which graph best represents the relationship between the velocity of an object thrown straight upward from Earth's surface and the time that elapses while it is in the air?
Answers
The graph that best represents the relationship between the velocity of an object thrown straight upward from the Earth's surface and the time that elapses while it is in the air is (option D)
What is Velocity?Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.
In other words, velocity is the primary indication of an object's location as well as its speed. It is defined as the distance traveled by an item in one unit of time. The displacement of an item in unit time is defined as velocity.
The equation that speaks to the velocity at a vertically upwards object that is accelerated against gravity and time is given as:
v = u + at; where
v = velocity
u = point from which the object starts to move
a is acceleration; and
t is time.
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Related Questions
30POINTS!!!!The solar wind is made up of electrically charged particles. They do not cause harm on Earth. They are too weak.
True
or
False
Answers
Answer:
true
Explanation:
the explanation is we would have been roasted if they weren't to weak
35) Kinetic energy in flowing water drives
A watermill. B. windmill
to generate electricity.
C. turbines. D. generator
Answers
Answer:
C) Turbines
Explanation:
C. because as the water flows, its kinetic energy is used to turn a turbine.
The velocity-time graph below shows the journey of a train. How far did the train travel during the whole journey?
Answers
The total distance that is covered in the velocity time graph is 5400 m.
What is the total distance travelled?We know that the velocity time graph shows the movement of an object form one point to the other. In this kind of velocity time graph that is shown here. We can see the complete journey of the body from start to rest and we can read off the total velocity as well as the total time taken from the velocity time graph that has been shown here.
Thus we can see from the graph that;
Total velocity of the object from start to rest = 60 m/s
Total time taken for the journey = 90 seconds
We know that;
Speed = distance/time
distance = speed * time
Total distance that is covered = 60 m/s * 90 seconds
= 5400 m
It then follows that all the distance that have been covered from the start to the end is 5400 m.
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Can work be done on a system if there is no motion?Select one:O A. Yes, if the sum of the external forces is zero.O B. Yes, if an external force is acting on the system,O C. No, since a system which is not moving has no energyO D. Yes, since motion is only relative.OE. No, since work involves a non-zero displacement.
Answers
ANSWER
E. No, since work involves a non-zero displacement
EXPLANATION
Work done on an object is given by,
\(W=F\cdot d\cdot\cos \theta\)Where W is work, F is the force applied on the object, d is the displacement of the object and θ is the angle between the applied force and the displacement.
Note that if there's no motion, then d = 0. Because d is multiplying the other variables, if d = 0 then work is zero as well.
Hence, the answer is option E.
You are driving a metric car that has a speedometer that displays in meters per second. When you look down at your speedometer, you see that it reads 23 m/s, then 7.4 s later you look down and it reads 13 m/s. What is your average acceleration over those 7.4 s?
Answers
A nearsighted woman can see clearly only objects within a 1.4 m of her eye. To see distant objects, she should wear eyeglasses of what power?
Answers
The nearsighted woman should wear eyeglasses with a power of about -0.714 diopters
A nearsighted woman who can only see objects clearly within 1.4 meters of her eye requires corrective lenses to improve her distance vision. To determine the power of the eyeglasses she needs, we can use the formula:
Power (P) = 1 / Focal length (f)
In this case, the focal length (f) is the distance at which she can see clearly, which is 1.4 meters. To convert this to meters, we have:
f = 1.4 m
Now, we can calculate the power of the eyeglasses:
P = 1 / 1.4 m = 0.714 diopters
The nearsighted woman should wear eyeglasses with a power of approximately -0.714 diopters to see distant objects clearly.
The negative sign indicates that the lenses should be concave, which is typical for correcting nearsightedness.
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Newton’s second law: The acceleration (a) of an object is directly proportional to the force on the object (F) and inversely proportional to its mass (m).
F < The greater the force, the greater the acceleration
a = -- OR F=ma
M< The greater the mass the less the acceleration
Answers
Answer:
there is the answer
Explanation:
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
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A spring scale is a device that uses a spring with a known spring constant to measure the weight of objects. You have a spring scale with a spring constant of 13 Nm. How much will the spring stretch when a 12-N weight is hung from one end?
Answers
Answer:
It would stretch about 6 inches, but it depends on the metal.
Explanation:
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A battery is connected in series with an ammeter and a variable resistor R.
When R= 6.0 ohms, the current in the ammeter is 1.0 A. When R= 3.0 ohms, the current is 1.5 A.
Calculate the internal resistance of the battery.
A. 6.0 ohms
B. 1.5 ohms
C. 4.5 ohms
D. 3.0 ohms
Answers
X Incorrect; Try Again; 3 attempts remaining Part 8 What is the capactance? Express your answer in farads.
Answers
Capacitance is a property of a capacitor and represents its ability to store electrical charge. It is denoted by the symbol C and is measured in farads (F).
The capacitance of a capacitor is determined by its physical characteristics, such as the size, shape, and materials used. It can be calculated using the equation:
C = Q / V
C = capacitance in farads,
Q = charge stored in the capacitor in coulombs,
V = voltage across the capacitor in volts.
In practical terms, capacitance describes the amount of charge that a capacitor can store per unit voltage. A capacitor with a higher capacitance can store more charge for a given voltage, while a capacitor with a lower capacitance can store less charge.
The farad (F) is a relatively large unit of capacitance, and in many cases, capacitors are commonly measured in smaller units such as microfarads (μF), nanofarads (nF), or picofarads (pF), which are equivalent to 10⁻⁶ F, 10⁻⁹ F, and 10⁻¹² F, respectively.
Thus, a capacitor's capacitance reflects its capacity to hold an electrical charge. It is measured in farads (F) and has the sign C.
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Complete question:
What is the capacitance?
Express your answer in farads.
which statement is true about electron shielding of nuclear charge?
Answers
Electron shielding reduces the effective nuclear charge.
Does electron shielding decrease the effective nuclear charge?Electron shielding refers to the phenomenon where inner electron shells in an atom partially block the attractive force of the positively charged nucleus on the outer electrons. This shielding effect arises from the repulsion between negatively charged electrons. As a result, the outer electrons experience a reduced effective nuclear charge, which is the positive charge felt by an electron due to the nucleus.
The shielding effect can be explained by considering the electron distribution in an atom. Inner electrons occupy regions closer to the nucleus, creating a barrier that diminishes the electrostatic attraction between the outer electrons and the nucleus. This reduction in the effective nuclear charge affects various atomic properties, such as atomic size and ionization energy.
the concept of electron shielding and its impact on atomic properties, including atomic radius and ionization energy. Understanding electron shielding helps in explaining trends and behaviors observed in the periodic table.
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If 60 Joules are used to raise a 15 N object, how high is the object raised?
Please help
Answers
Answer:
W = 60 J
F = 15 N
s = ?
W = Fs
s = W / F
s = 60 / 15
s = 4 m
how many km would you have to go above the surface of the earth to for your weight to decrease by half
Answers
When we go 19113 Km above the surface of earth, the weight of the person will become half.
The weight of the person is given by
W = Mg
Where,
M is mass of the person and g is the gravitational acceleration.
The gravitational acceleration of the earth varies with the height from the surface of the earth as,
g' = g(R/(R+H))²
Where,
R is the radius of earth,
g' is the gravitational acceleration at height H,
For g' = g/2,
g/2 = g(R/(R+H))²
1/√2 = (R/(R+H))²
Solving further,
H = 3R
So, when we go to a distance 3R above the surface of earth the weight of the person will become half.
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anyone who scuba dives is advised not to fly within the next 24 h because the air mixture for diving can introduce nitrogen to the bloodstream. without allowing the nitrogen to come out of solution slowly, any sudden air-pressure reduction (such as during airplane ascent) can result in the nitrogen forming bubbles in the blood, creating the bends, which can be painful and even fatal. military special operation forces are especially at risk. what is the change in pressure on such a special-op soldier who must scuba dive at a depth of 20 m in seawater one day and parachute at an
Answers
The change in pressure on such a special-op soldier is 22.58 x 10⁴ Pa.
Calculation:-
Let pressure at surface of earth be P Pa.
pressure at height of 8.1 km in air can be calculated as follows .
pressure due to column of air of 8.1 km height
= h d g , h is height , d is density of air and g is acceleration due to gravity
= 8.1 x 1000 x .87 x 9.8 = 6.9 x 10⁴ Pa .
pressure at the height of 8.1 km
= P - 6.9 x 10⁴ Pa
Pressure due to column of 16 m in the sea
= h d g
16 x 1000 x 9.8
= 15.68 x 10⁴ Pa .
Pressure at depth of 16m
= P + 15.68 x 10⁴
pressure difference between points at height of 8.1 km and pressure at point 16 m deep
= P + 15.68 x 10⁴ - P + 6.9 x 10⁴ Pa
= 22.58 x 10⁴ Pa .
Air is the invisible combination of gases that makes up the Earth's ecosystem. this is what we suggest while we communicate approximately the air that we breathe. The phrase air is also used to consult the advent of some thing, as in an air of mystery.
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When charging a secondary cell, energy is stored within a dielectric material using an electric field. True or False
Answers
It is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"
What is a secondary cell?The term secondary cell refers to a cell that can be recharged when it is used up. A typical example of a secondary cell is a lithium ion battery.
We know that most of the secondary cell are charged using a chemical that is inside the battery. As such, it is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"
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Students are playing tug-of-war. Which of these would cause the rope to move to the right?
A. A net force that points to the right
B. Balanced forces
C. A net force that points to the left
D. A net force of 0
Answers
Answer:
A, a net force that points to the right
Explanation:
This would make it move to the right because the net force would be above 0, and moving to the right.
Answer:
A net force that points to the right.
Explanation:
Look at the question, then use common sense while looking at the answers. Don't overthink it to much.
This is correct on a-p-e-x
what are the differences in your experimental results between the perfectly elastic and inelastic collisions?
Answers
The main difference between perfectly elastic and inelastic collisions is that In a perfectly elastic collision, the total kinetic energy of the system is conserved, while in an inelastic collision, the total kinetic energy of the system decreases.
Perfectly elastic collisions result in no loss of kinetic energy, whereas inelastic collisions result in a loss of kinetic energy. Collisions in which the kinetic energy is conserved are known as perfectly elastic collisions. Two billiard balls colliding are an example of a perfectly elastic collision because they have the same mass, and there is no deformation of the ball. As a result, in a perfectly elastic collision, both momentum and kinetic energy are conserved.In contrast, in an inelastic collision, kinetic energy is not conserved.
In an inelastic collision, two or more bodies come together and stick to one another after colliding. When two cars collide, for example, they do not bounce off each other; instead, they become deformed and stick together. A loss of kinetic energy is present in inelastic collisions because the deformation causes some of the energy to be converted to heat, sound, and other forms of energy that are not associated.
Therefore, the differences in the experimental results between perfectly elastic and inelastic collisions are due to the fact that inelastic collisions cause kinetic energy to be lost, while perfectly elastic collisions do not cause kinetic energy to be lost.
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1
A pencil weighing 1N is sitting on a desk.
Write down all the forces on the desk.
a.
b.
Draw a free body diagram of the desk.
c.
Add up the forces in the x-direction (horizontal) and the y-direction (vertical)
Answers
The force diagram on the desk consists of normal reaction and weight of the pencil.
The net force on the desk in vertical direction is 1 N.
The net force on the desk in horizontal direction is 0.
The given parameters;
weight of the pencil, W = 1 NThe force diagram of the desk is sketched as follows;
↑ N
⊕
↓ W
Where;
N is the normal reaction on the deskW is the weight of the ballThe net force on the desk in vertical direction = 1 N
The net force on the desk in horizontal direction = 0
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if a circuit has three batteries each would 3 volts how much total voltage is it in the circuit?
Answers
33) A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s while coming to a halt, the jumper's average deceleration is about
Answers
The magnitude of the jumper's average deceleration is about 15 m/s².
To find the magnitude of the jumper's average deceleration, we can use the equation for average acceleration:
Average acceleration (a) = Change in velocity (Δv) / Time taken (Δt)
In this case, the bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. Let's assume the bungee cord brings the jumper to rest after the stretch period.
The change in velocity (Δv) is the initial velocity (30 m/s) minus the final velocity (0 m/s), which is the jumper coming to rest.
Δv = 30 m/s - 0 m/s = 30 m/s
The time taken (Δt) for the stretch period is given as 2 seconds.
Δt = 2 s
Now, we can calculate the average acceleration:
Average acceleration (a) = Δv / Δt = 30 m/s / 2 s = 15 m/s²
Therefore, the magnitude of the jumper's average deceleration is about 15 m/s².
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A wave with an amplitude of
1 cm and a wavelength of 2 cm
Answers
A wave with an amplitude of 1 cm and a wavelength of 2 cm is a small and compact disturbance that is characterized by its amplitude and wavelength.
A wave is a disturbance that travels through space, transferring energy from one point to another without any actual movement of matter. Waves are characterized by their amplitude and wavelength, among other properties. In the case of a wave with an amplitude of 1 cm and a wavelength of 2 cm, we can say that the wave is a relatively small and compact disturbance. The amplitude of a wave is the maximum displacement of the wave from its equilibrium position. In this case, the wave has an amplitude of 1 cm, which means that the peak of the wave rises 1 cm above its baseline, and the trough of the wave falls 1 cm below its baseline. The wavelength of a wave is the distance between two corresponding points on the wave, usually measured from peak to peak or trough to trough. In this case, the wavelength of the wave is 2 cm, which means that the distance between two peaks or two troughs of the wave is 2 cm. It is worth noting that the amplitude and wavelength of a wave are related to each other, in that waves with larger amplitudes tend to have shorter wavelengths, and vice versa. This is because the energy of the wave is conserved, so if the amplitude increases, the wavelength must decrease to keep the total energy constant. These properties are related to each other and reflect the amount of energy carried by the wave.
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Determine the magnitude of the electrostatic force on a 0.06000 C charged object when it is placed in an electric field of magnitude 1500 N/C
Answers
Answer:
Explanation:
Use the following equation:
\(E=\frac{q}{F}\) and solve for F:
\(F=\frac{q}{E}\) and filling in:
\(F=\frac{.0600}{1500}\)
F = 4.0 × \(10^{-4\) N
the breakdown of rocks by chemical action of air and water is called
Answers
Answer:
Chemical weathering
Explanation:
This changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.
How many atoms are there in 0,23 g Na?
Answers
Answer:
There are 6.02*10^23 atoms in each mole (Avagadro no.) That is x moles * avagadro no. According to that, in 23 grams of sodium we have 6.02*10^23 atoms of Na.
Explanation:
A motorcycle being driven on a dirt path hits a rock. Its 50-kg cyclist is projected over the handlebars at 15 m/s into a haystack. If the cyclist is brought to rest in 0. 5 second, the magnitude of the average force exerted on the cyclist by the haystack is.
Answers
The magnitude of the average force is -1.5×10³ N.
What is force?
A force is any action that seeks to preserve, modify, or deform a body's motion.
We know,
The magnitude of the average force is:
F = m(v-u)/t
F = Average force
m = mass of the cyclist
v = Final velocity
u = Initial velocity
t = time.
Putting values into the formula
F = 50(0-10)/0.5
F = -1500 N
F = -1.5×10³ N
The negative sign is the force act against the motion of the cyclist.
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A running is training to compete in a marathon. During his training session he runs at anaverage speed of 4.5 m/s. If his training session lasted for 130 minutes, how long did he run?
Answers
Answer:
It would be 565m/s.
Explanation:
130 × 4.5=565
Part A
Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?
A. Materials that are insulators and conductors have a high
resistance to electricity.
B. It is more difficult for electricity to pass through insulators than conductors.
C. Insulators and conductors are able to generate a high amount of electricity
D.Electrons move through rubber easier than they move through
metal.
Part B
Which sentence from "Energy Story" best supports the answer in Part A?
A. "Electricity is conducted through some things better than
others."
B. "Its resistance measures how well something conducts
electricity."
C."Some things hold their electrons very tightly."
D. "Other materials have some loosely held electrons, which move
through them very easily."
Answers
Answer:
Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?
A. Materials that are insulators and conductors have a high
resistance to electricity.
Part B
Which sentence from "Energy Story" best supports the answer in Part A?
B. "Its resistance measures how well something conducts
electricity."
Explanation:
Why is the air temperature shown on Sensor 4 different from Sensor 5, even though they are at the same latitude?
Answers
Answer:
Hello your question lacks some information but i will give you a more General answer about differences in temperature of bodies on same latitude
answer : Continentality is the reason
Explanation:
Sensors or objects on the same latitude are supposed to have the same air temperatures but in some cases this might not be true. This is because of the proximity of the bodies to an Ocean or any water body.
Areas close to water bodies experience modest temperatures even if they are on the same latitude with Areas experiencing harsh temperatures. This effect is termed as Continentality
Hello.
Me and my friend are in year 8 and are currently doing a project on electricity.
We are attempting to power our electrical current that we made out of onions but we have to write how onions power a light bulb. May someone please explain, in simple words and vocabulary, what an onion contains inside of it and how it manages to power a light bulb ? thank you.
Answers
which moving object would have the least amount of kinetic energy if they were traveling at the same speed?
Answers
The object with least mass would have the least amount of kinetic-energy if they were traveling at the same speed.
Equation of kinetic energy is \(KE = (1/2) mv^2\)
m is the mass of the object and v is velocity.
From the equation of kinetic energy we can see two factors which kinetic energy is depends upon. First one is mass of the moving object. Second one is the velocity of the object.
Kinetic energy is directly depending on the mass of the object. That means if mass is higher, then kinetic energy also higher.
Likewise kinetic energy directly depends upon the square of the velocity of the object. So if velocity of A is twice than B, then the kinetic energy of A will be 4 times than of B.
In the question it is stated that objects are traveling at the same speed. If the speed is same that is if velocity is same, then the only factor that affects the kinetic energy will be mass of the moving objects.
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