What type of energy do not harm our environment?
Answers
Answer:
Explanation: Renewable energy is energy that has been derived from earth's natural resources that are not finite or exhaustible, such as wind and sunlight. Renewable energy is an alternative to the traditional energy that relies on fossil fuels, and it tends to be much less harmful to the environment.
Related Questions
Something that bases conclusions on established authority is Question 1 options: A.pseudoscience B. non-science C.science
Answers
Answer:
is the first one right
Explanation:
Answer:
yes
Explanation:
A skater pushes on the back of a 45.3 kg sled with an average force of 72.5 N over a distance of 15.6 m. Find the final speed of the sled if it was moving at 1.31 m/s initially.
Answers
7.19 meters per second
Explanation
Step 1
find the acceleration of the skater
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate,it is defined by the expression
\(\begin{gathered} F=ma \\ where\text{ F is the applied force} \\ m\text{ is the mass} \\ a\text{ is the accelearaion} \end{gathered}\)so
a) Let
\(\begin{gathered} F=72.5\text{ N} \\ m=45.3\text{ Kg} \end{gathered}\)b) now, replace and solve for a
\(\begin{gathered} F=ma \\ replace \\ 72.5\text{ N=45.3 kg*a} \\ divide\text{ both sides by 45.3 Kg} \\ \frac{72.5N}{45.3}\text{=a} \\ a=1.6\text{ }\frac{m}{s^2} \end{gathered}\)Step 2
Now, to find teh final speed we need to use the expression
\(v_f^2=v_1^2+2ax\)so
a)Let
\(\begin{gathered} v_i=1.31\frac{m}{s} \\ x=15.6m \\ a=1.6\frac{m}{s^2} \end{gathered}\)replace
\(\begin{gathered} v_f^2=v_1^2+2ax \\ v_f^2=(1.31)^2+2(1.6)(15.6) \\ v_f^2=51.63 \\ v_f=\sqrt{51.63} \\ v_f=7.19\frac{m}{s^} \end{gathered}\)so, the answer is
7.19 meters per second
I hope this helps you
What is the current in a 160V circuit if the resistance is 10Ω?
Answers
Hello!!
For this, use the formula:
\(\boxed{I=V/R}\)
\(\textbf{Being:}\)
\(\sqrt{}\) \(I = Current = ?\)
\(\sqrt{}\) \(V = Voltage = 160 \ V\)
\(\sqrt{}\) \(R = Resistance = 10\ \varOmega\)
\(\textbf{If we replace and resolve it}\)
\(I = 160\ V / 10\ \varOmega\)
\(I = 16\ A\)
\(\text{The current of that circuit is \textbf{16 Amperes}}\)
The change in sea level due to tides are primarily the result of ?
1. Earth's rotation and revolution around the Sun
2. The Moon's rotation
3. The Earth's rotation and the Moon's revolution
4. The Earth's elliptical orbit
Answers
The change in sea level due to tides which are primarily the result of the Earth's rotation and Moon's revolution, option 3 is the correct answer.
Tide: Tides are very long-period waves that are move through the sea
The elliptical orbits of the moon around the Earth and the elliptical orbit of the Earth around the sun have a large or huge effect on the the Earth's tides. Once in a month, at perigee, when the moon is closest to the Earth, tide-generating forces are higher than normal, and as a result of which produce above average ranges in the tides.
Therefore due to the attraction between the earth and the moon or we can say that the due to the effect of Moon's revolution around the Earth tides are form, so option 3 is the correct answer.
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Please help me!! 1 a) Compare the speed that light waves travel in air to the speed that sound waves travel in the air. (Show results in meters/second) 1 b) How many times faster do light waves travel in the air in comparison to sound waves in air? (show working out) 2) Compare the speed of light in water to the speed of sound in water. (Show results in meters/second)
Answers
The speed of light waves travel in air is 3.0 * 10⁸ m/s, while the speed of sound waves in air at 25° C is 346.3 m/s.
Light waves travels 8.66 * 10⁵ times faster in air in comparison to sound waves in air.
The speed of light in water is 3.0 * 10⁸ m/s while the speed of sound in water is 1.481 m/s
What is wave speed?The distance covered by a wave per second is known as the wave speed.
The speed of a wave varies according to the density of the medium it is travelling as well as the due to the frequency of the wave.
The speed that light waves travel in air = 3.0 * 10⁸ m/s
The speed that sound waves travel in the air at 25° C = 346.3 m/s
The ratio of the speed of speed that light waves travel in air to that of the speed that sound waves travel in the air at 20° C = 3.0 * 10⁸/346.3 = 8.66 * 10⁵
Therefore, light waves travels 8.66 * 10⁵ in the air in comparison to sound waves in air
The speed of light in water = 3.0 * 10⁸ m/s
The speed of sound in water = 1,481 m/s
Therefore, light waves travels much faster water than sound waves in water.
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After 4 half-lives, 5g of a sample of Krypton-85 remains unchanged. What was the original mass of the sample?80 g40 g20 g10 g
Answers
The original mass of the sample of Krypton-85 was 80 grams.
Hence, the correct option is A.
The half-life of a radioactive substance is the amount of time it takes for half of the substance to decay. If after 4 half-lives, 5g of a sample of Krypton-85 remains unchanged, we can determine the original mass of the sample.
Let's start by determining the fraction of the sample remaining after 4 half-lives. Since each half-life halves the amount of the substance, after 4 half-lives, the remaining fraction can be calculated as (1/2)⁴.
Remaining fraction = (1/2)⁴ = 1/16
The remaining mass can be calculated by multiplying the original mass by the remaining fraction:
Remaining mass = Original mass * Remaining fraction
5g = Original mass * (1/16)
To solve for the original mass, we can rearrange the equation:
Original mass = 5g / (1/16)
Original mass = 5g * 16
Original mass = 80g
Therefore, the original mass of the sample of Krypton-85 was 80 grams.
Hence, the correct option is A.
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How does the induction motor works?
Answers
Answer:
It uses electromagnets to create a rotating magnetic field.
Explanation:
I remember learning this in AP Physic class. The interaction between the two fields causes the rotor to turn and it creates a magnetic field!
Answer:
It generates a rotating magnetic field using electromagnets.
24.11 a capacitor is made from parallel plates with a plate area of .0178 m2 . the plates are placed 0.35 mm apart and filled with a dielectric material. if the capacitance of the capacitor is 1.44 x 10-9 f, what is the dielectric constant of the material?
Answers
Using the buildup of electric charges on two neighbouring surfaces that are electrically insulated from one another, a capacitor is a device that stores electrical energy in an electric field. It is an electrical passive component with two terminals. Capacitance is the measurement of a capacitor's effect.
C = ∈oA / d = (8.85 * 10⁻¹² * 0.0178) / (0.35 * 10⁻³)
= 4.5 * 10⁻¹⁰ F
Q = C*V = (4.5 * 10⁻¹⁰ * 27)
= 1.215 * 10⁻⁸ C
E = V / d = 27 / (0.35 * 10⁻³)
= 7.71 * 10⁴ N/C
An electrical energy storage device called a capacitor is made up of two conductors that are situated close to and insulated from one another. A parallel-plate capacitor serves as an easy-to-understand illustration of one such storage device.
In contrast to a battery, a capacitor is a part of a circuit that uses a potential difference created by charged particles distributed between (typically two) plates to temporarily store electrical energy. A capacitor may charge more quickly than a battery and can quickly release all of its stored energy.
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How much resistance is required in a 27 volt circuit in order to achieve a current of 0. 66 amps? Show all work (formula, substitution with units, answer with units)
Answers
The resistance in the 27-volt circuit necessary to obtain a current of 0.66 amps is roughly 40.91 ohms.
Ohm's Law, which states that voltage (V) equals the product of current (I) and resistance (R), can be used to determine the resistance necessary in a circuit to achieve a certain current. The formula is as follows:
V = I * R
Voltage (V) = 27 volts is given.
I (current) = 0.66 amps
We must locate the resistance (R). Rearranging the formula yields:
R = V / I
Substituting the following values:
R is equal to 27 volts / 0.66 amps.
Calculating:
R ≈ 40.91 ohms
As a result, the resistance in the 27-volt circuit necessary to obtain a current of 0.66 amps is roughly 40.91 ohms.
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Question 21 Marks: 1 Minimum wash water temperature in a hospital laundry isChoose one answer. a. 146 to 150 degrees F b. 160 to 167 degrees F c. 170 to 178 degrees F d. 185 to 196 degrees F
Answers
The option b, 160 to 167 degrees F, is likely the correct answer.
The primary goal of laundering healthcare linens is to remove soil and microbial contamination to prevent the spread of infections. The temperature of the wash water is a critical factor in achieving this goal because it directly affects the effectiveness of the cleaning and disinfection process.
According to the CDC guidelines, the minimum wash water temperature for processing healthcare linens is 160 to 165 degrees Fahrenheit (71 to 74 degrees Celsius). This temperature range is based on the fact that most bacterial pathogens and viruses are killed at temperatures above 160 degrees Fahrenheit.
It is important to note that different types of healthcare linens may have different temperature requirements based on their fabric type and level of contamination. For example, some delicate fabrics may require lower temperatures to prevent damage, while heavily soiled linens may require higher temperatures to ensure effective cleaning.
In addition to temperature, other factors such as the duration of the wash cycle, detergent selection, and mechanical action are also important in achieving effective cleaning and disinfection of healthcare linens. Proper training and adherence to established laundry protocols are essential to ensure that healthcare linens are processed safely and effectively.
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(b) What is the probability that the electron can be detected in the middle one third of well, region (b)
Answers
In order to determine the probability that an electron can be detected in the middle one-third of a well region, we need to take into account the wave function and the boundary conditions.The wave function represents the probability density of finding the electron in a particular location within the well. The boundary conditions are determined by the geometry of the well, which can be rectangular, triangular, or other shapes.
The Schrodinger equation is used to calculate the wave function and determine the probability density of finding the electron in a particular location. The wave function is a complex function that describes the position and momentum of the electron. It is also used to calculate the energy of the electron in the well.The probability of finding the electron in the middle one-third of the well can be determined by integrating the probability density over the middle one-third of the well region. This will give us the probability of finding the electron in that region. The integral can be evaluated using numerical methods or analytical methods, depending on the complexity of the wave function and the boundary conditions.In general, the probability of finding the electron in the middle one-third of the well will depend on the shape of the well, the energy of the electron, and the boundary conditions. For example, if the well is rectangular and the electron is in the ground state, then the probability of finding the electron in the middle one-third of the well will be high. However, if the well is triangular and the electron is in an excited state, then the probability of finding the electron in the middle one-third of the well will be lower.For such more question on probability
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a swan on a lake gets airborne by flapping its wings and running on top of the water. if the swan must reach a velocity of 6.00 m/s to take off and it accelerates from rest at a constant rate of 0.350 m/s2, how far will it travel before becoming airborne?
Answers
By using uniform motion, the distance traveled by the swan is 51.43 meters.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
vo = 0 m/s
vt = 6 m/s
a = 0.35 m/s²
By using second equation, we can find the distance traveled by swan
vt² = vo² + 2a . s
6² = 0² + 2 . 0.35 . s
36 = 0.7 s
s = 36 / 0.7
s = 51.43 m
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a 0.150 kg baseball traveling with a horizontal speed of 4.70 m/s is hit by a bat and then moves with a speed of 32.5 m/s in the opposite direction. what is the change in the ball's momentum?
Answers
To calculate the change in the ball's momentum, we can use the formula:
Δp = pf - pi
Where:
Δp = change in momentum
pf = final momentum
pi = initial momentum
The initial momentum of the baseball can be calculated using the formula:
pi = m * vi
Where:
m = mass of the baseball (0.150 kg)
vi = initial velocity (4.70 m/s)
pi = 0.150 kg * 4.70 m/s = 0.696 kg*m/s
The final momentum of the baseball can be calculated using the formula:
pf = m * vf
Where:
m = mass of the baseball (0.150 kg)
vf = final velocity (-32.5 m/s)
pf = 0.150 kg * (-32.5 m/s) = -4.87 kg*m/s
Now we can use these values to find the change in momentum:
Δp = pf - pi = -4.87 kgm/s - 0.696 kgm/s = -5.57 kg*m/s
Therefore, the change in the ball's momentum is -5.57 kgm/s, which means that the ball's momentum decreased by 5.57 kgm/s.
This decrease in momentum is a result of the force exerted on the ball by the bat, which caused the ball to reverse its direction and change its velocity.
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Please help!!!!!!!!!
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What help do you want? If you tell, I may help you.
You attend a concert and have a seat that is 70 m away from the stage where the sound is produced. How long does it take for the sound to reach your ears? You take a picture with your phone and send it to your friend who could not come to the concert. She lives in a town 45 miles away. How long does it take until she gets the picture on her phone? Please, include the assumptions that you make.
Answers
Given:
distance of observer from the sound source, \(s=70~m\)
distance between the source of image information sender and the receiver, \(d=45~miles=72420.48~m\)
Assumptions:
speed of sound, \(v=343~m/s\)
speed of the image information being sent, \(c=3\times 10^8~m/s\) (we assume it to be nearly the speed of light in vacuum)
Solution:
Time taken by the sound to reach the observer:
\(time=\frac{distance}{speed}\)
\(time=70\div 343\)
\(time \approx 0.2~s\)
Time taken by the image to reach the destination:
\(time=\frac{72420.48}{3\times 10^8}\)
\(time=2.4\times 10^{-4}~s\)
A red cart mass = 2kg and a blue cart mass = 2 kg are ELASTICALLY crashed into each other at the indicated velocities and bounce. After the collision which cart will have the SMALLEST speed.
Answers
After the collision the cart with the SMALLEST speed is the cart with the GREATEST initial speed.
What is the principle of conservation of linear momentum?
The principle of conservation of linear momentum states that in an Isolated system, the total momentum of the system is conserved.
Mathematically, the formula for conservation of linear momentum is given as;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where;
m₁ is the mass of the red cart
m₂ is the mass of the blue cartu₁ is the initial velocity of the red cartu₂ is the initial velocity of the blue cartv₁ is the final velocity of the red cartv₂ is the final velocity of the blue cartThe final speed of each cart is calculated as;
v₁ = [ m₁u₁ + m₂u₂ - m₂v₂ ] / m₁
v₂ = [ m₁u₁ + m₂u₂ - m₁v₁ ] / m₂
since m₁ = m₂, our new equation becomes;
v₁ = u₁ + u₂ - v₂
v₂ = u₁ + u₂ - v₁
Thus, the cart with the least initial speed, will have the greatest final speed and vice versa.
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two satellites of masses m1 and m2 orbit a planet of mass m in circular orbits. the satellites travel in opposite directions with speeds v1 and v2, as shown in the figure above. their orbital radii are r1 and r2,respectively. assume that m >> m2 > m1. if u1 is the potential energy of the planet-satellite system containing the satellite of mass m1 and u2 is the potential energy of the planet-satellite system containing the satellite of mass m2, in terms of the given variables, what is the ratio u1/u2?
Answers
The ratio u₁/u₂ is equal to (m₁/m₂)×(r₁/r₂). The potential energy of a planet-satellite system is given by the formula U = -G(m₁m₂)/r, where G is the gravitational constant, m₁ and m₂ are the masses of the planet and satellite, and r is the distance between their centers.
In circular orbits, the kinetic of the satellite is equal to half of its potential energy, so the total energy of the system is negative and equal in magnitude to the potential energy.
Using this formula, we can write u₁ = -G(mm₁)/r₁ and u₂ = -G(m×m₂)/r₂.
Dividing u₁ by u₂, we get:
u₁/u₂ = (-G(m m₁)/r₁) / (-G(m m₂)/r₂)
u₁/u₂ = (m₁ r₂) / (m₂ r₁)
u₁/u₂ = (m₁/m₂) (r₂/r₁)
Since the satellites are in circular orbits, their speeds are given by the formula v = √(Gm/r),
where v is the speed, G is the gravitational constant, m is the mass of the planet, and r is the radius of the orbit.
Therefore, we can write r₂/r₁ = (v₁/v₂)².
Substituting this into the previous equation, we get:
u₁/u₂ = (m₁/m₂) ((v₁/v₂)²)
The ratio u₁/u₂ is equal to (m₁/m₂) (v₁/v₂)², where m₁ and m₂ are the masses of the two satellites, v₁ and v₂ are their speeds, and r₁ and r₂ are their orbital radii.
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Please help me, I am following along diligently. V(t) = t^2 -9t+18, with distance, s measured in meters, left or right of 0, and t measured in seconds, with t between 0 and 8 seconds inclusive. The position at time t=0 sec is 1 meter right of 0, that is s(0)= 1Part I: Average velocity over the interval 0 to 8 secondsPart II: The instantaneous velocity and speed at time 5 secsPart III: The time intervals when the particle is moving rightPart IV: The time intervals when the particle is going faster, and slowing downPart V: Total distance the particle has traveled between 0 and 8 seconds
Answers
Given that the velocity at any time t is
\(v(t)=t^2-9t+18\)Also, the time interval is from t = 0 to t = 8 seconds
The position at time t = 0 s is s(0) = 1 m towards right of zero.
The initial time is t = 0 s, so the initial velocity will be
\(\begin{gathered} v_i(t=0)=0^2-9\times0+18\text{ } \\ v_i(0)\text{ = 18 m/s} \end{gathered}\)The final time is t = 8 s, so the final velocity will be
\(\begin{gathered} v_f(t=8)=8^2-9\times8+18 \\ v_f(8)\text{ = 64-72+18} \\ =\text{ 10 m/s} \end{gathered}\)The average velocity will be
\(\begin{gathered} v_{av}=\frac{v_i+v_f}{2} \\ =\frac{18+10}{2} \\ =14\text{ m/s} \end{gathered}\)Thus, the average velocity is 14 m/s.
Part II:
The instantaneous velocity at time t =5 s will be
\(\begin{gathered} v(t=5)=5^2-9\times5+18 \\ =25-45+18 \\ =-2\text{ m/s} \end{gathered}\)The instantaneous speed is the magnitude of instantaneous velocity.
Thus, the instantaneous speed will be 2 m/s.
Part III:
The particle will move towards the right when v(t) > 0
The time intervals will be
\(\begin{gathered} t^2-9t+18>0 \\ t^2-6t-3t+18>0 \\ t(t-6)-3(t-6)>0 \\ (t-6)(t-3)>0 \\ t-6>0\text{ or t>6} \\ t-3>0\text{ ot t>3} \end{gathered}\)Thus, time intervals are t > 3 and t > 6 when the particle is moving towards the right.
Part IV :
The particle will move faster if the acceleration, a(t) > 0
The particle will slow down if the acceleration, a(t) < 0
So, first, we need to find the acceleration, it can be calculated as
\(\begin{gathered} a(t)=\text{ }\frac{d(v(t))}{dt} \\ =\frac{d(t^2-9t+18)}{dt} \\ =2t-9 \end{gathered}\)For the particle moving faster,
\(\begin{gathered} a(t)>0 \\ 2t-9>0 \\ 2t-9+9>9+0 \\ 2t>9 \\ \frac{2t}{2}>\frac{9}{2} \\ t>\frac{9}{2} \\ t>4.5\text{ s} \end{gathered}\)For particle slowing down,
\(\begin{gathered} a(t)<0 \\ 2t-9<0 \\ 2t-9+9<9+0_{} \\ 2t<9 \\ \frac{2t}{2}<\frac{9}{2} \\ t<4.5\text{ s} \end{gathered}\)The total distance can be calculated as
\(\begin{gathered} s(t)=\int ^8_0v(t)dt \\ =\text{ }\int ^8_0(t^2-9t+18)\mathrm{d}t \\ =\lbrack\frac{t^3}{3}\rbrack^8_0-9\lbrack\frac{t^2}{2}\rbrack^8_0+18\lbrack t^{}\rbrack^8_0 \\ =\frac{1}{3}\lbrack512-0\rbrack-9\lbrack64-0\rbrack+18\lbrack8-0\rbrack \\ =\text{ 170.67-576+144} \\ =-261.33\text{ m} \end{gathered}\)Here, the negative symbol indicates it is towards the left from zero.
A student is watching a video in order to understand how convection in the mantle of the Earth occurs. The video shows rock rising and sinking to make convection currents in the mantle. Which process is responsible for causing rock to rise? A. Rock is heated. B. Rock rapidly cools off. C. Rock increases in density. D. Rock undergoes intense pressure.
Answers
Answer:
A
Explanation:
Because of the convectional currents
Electric charge only has an amount. That makes it a
Answers
The longer the lever, the greater the
Answers
Answer: The longer the lever, the greater the force on the load will be.
Explanation:
which of these two functional groups would you expect to be more electronegative?
Answers
The two functional groups that would be expected to be more electronegative is b. carboxyl
The ability of an atom to draw electrons into a chemical connection is known as electronegativity. The oxygen atom in typical carbonyl group of the carboxyl functional group, which consists of a carbonyl and a hydroxyl which is the -OH group, is extremely electronegative. This specific group is considerably more electronegative because oxygen has a higher electronegativity than carbon.
Whereas, a polysaccharide, is a carbohydrate made up of many sugar units. While the degree of electronegativity of various functional groups within the polysaccharide structure, such as hydroxyl (-OH) groups, may fluctuate, overall polysaccharide molecule lacks a particular functional group that is consistently more electronegative than a carboxyl group.
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Complete Question:
Which of these two functional groups would you expect to be more electronegative?
a. polysaccharide
b. carboxyl
c. Na Cl
Mr. Temper, a 5-foot, 4-inch, 100-pound hothead, tells Mr. Big, a 300-pound professional wrestler, that he is going to "make him regret he set foot in this bar." At the same time, Temper clenches and raises his fists. Big looks at Temper from head to toe and responds, "yeah, right." Big can sue Temper for: a. assault
b. battery
c. assault and battery
d. Big has no cause of action
Answers
Big has no cause of action against Temper. In this scenario, while Temper may have made a verbal threat and raised his fists in a confrontational manner, there is no indication that he physically touched or harmed Big.
Assault refers to the act of intentionally causing apprehension or fear of imminent harmful or offensive contact. Battery, on the other hand, involves the intentional and harmful or offensive physical contact with another person without their consent.
In this case, Temper's actions may constitute assault due to the verbal threat and raising his fists, creating an atmosphere of fear or apprehension. However, since no physical contact or harm occurred, battery is not applicable. Therefore, the appropriate response is option d: Big has no cause of action against Temper.
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If a 0. 5 kg pair of running shoes would weigh 11. 55 newtons on jupiter, what is the strength of gravity there?.
Answers
The strength of gravity on Jupiter is 23.1 m/\(s^{2}\).
F = ma
a = F / m
a = acceleration due to gravity
F = weight on Jupiter, given = 11.55 N
m = mass, given = 0.5 kg
Put these values in formula, a = F / m
a = 23.1 m/\(s^{2}\)
Therefore, the strength of gravity on Jupiter is 23.1 m/\(s^{2}\).
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If a wave vibrates back and forth 12 times each second, what is period of the wave?
Answers
Answer:
I think it might be 9 hz but not 100% shore though
Explanation:
The body of the runner was found in the park one early, hot summer morning. Her body shows rigor in her face, neck, arms, and torso. How long has been dead?
Answers
for a long time but has been preserved by ice
a 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. calculate the height of the image (in mm) for the maximum magnification for a normal eye.
Answers
The height of the image for the maximum magnification for a normal eye is 7 mm.
What is the the height of the image?The focal length of a simple microscope = f = 10 cm
The shortest distance of distinct vision = D = 25cm
The hight of the newspaper print = h = 2 mm
Let the height of the image = H
There will be a maximum magnification when the image is generated at the closest range of distinct vision, and the converging lens or a simple microscope will provide the maximum magnification by:M = 1 +\(\frac{D}{f}\)
The height of the image is given by:H = Mh
= [1 +\(\frac{D}{f}\) ](h)
= [1 + \(\frac{25}{10}\) ] 2
=[ \(\frac{35}{10}\) ] 2
= 3.5 (2)
=7mm
So, option b is correct.What is focal length?The inverse of the optical power of an optical system, the focal length provides a measurement of how strongly the system converges or diverges light. A system's light converges when the focal length is positive, while it diverges when the focal length is negative.In a system with a shorter focal length, the rays are bent more sharply, coming into focus closer to the system or diverging more quickly.The distance (in millimeters) between your lens's point of convergence and the sensor or film that captures the image is known as the focal length. The amount of the scene that your film or digital camera can capture depends on the focal length of the lens.The complete question is :
A 10-cm focal length converging lens is used to magnify small newspaper print 2.0 mm high. Calculate the height of the image (in mm) for the maximum magnification for a normal eye.
a. 3.5
b. 7.0
c. 9.2
d. 12
e. 2.5
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brainly help this kid who's a liability
Answers
Answer:
1 go up
Explanation:
crude density is 9/10 of water (ice melting) so oil will go up
A block of ice floats in an oil in a vessel when the ice melts the level of oil will go up.
Explanation:
When the water is heated, it expands, increasing in volume.1)A particle at 1.65s is at 4.48m and at 2.05s is at 4.95m. What is its average velocity?
2)A bird can fly 95.6 km/h. How long does it take to fly 778 km? Express your answer in hours [h].
3)if you are driving 116 km/h along a straight road and you look to the side for 13.8s, how far you travel during this inattentive period? Express your answer in meters.
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Answers
According to the problem the average velocity of 0.47m/0.4s = 1.175m/s.
What is average velocity?Average velocity is a term used to describe an object's rate of change in its position. It is a vector quantity, meaning it has both a magnitude (the speed at which the object is moving) and a direction.
1) The average velocity of the particle can be calculated by taking the difference in position at different times and dividing it by the difference in time. For this given problem, the average velocity can be calculated by taking the difference in position (4.95m - 4.48m = 0.47m) and
dividing it by the difference in time (2.05s - 1.65s = 0.4s).
This gives an average velocity of 0.47m/0.4s = 1.175m/s.
2) To find the time it takes the bird to fly 778 km,
we can divide the total distance by the bird's speed.
Since the bird can fly 95.6 km/h, we divide 778 km by 95.6 km/h.
This gives 778 km/95.6 km/h = 8.14 h.
Therefore, it takes 8.14 h for the bird to fly 778 km.
3) To calculate the distance a person travels while looking away for 13.8s, we can take the speed of 116 km/h and convert it to m/s.
To do this, we divide 116 km/h by 3.6, giving 32.22 m/s.
We then multiply this by the time of 13.8s to get the distance travelled: 32.22 m/s x 13.8 s = 445.2 m.
Therefore, the person travels 445.2 m during the inattentive period of 13.8s.
To learn more about average velocity
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how to find resultant force?
Answers
Explanation:
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force. The direction of the resultant force is in the same direction as the larger force