In an equilibrium system, the sum of all forces is zero but the sum of moments of these forces depends on the location where the moments are calculated. The statement is true.
What is equilibrium?A body is in a state of equilibrium when there are no changes in its motion. In static equilibrium, the object is stationary, and in dynamic equilibrium, the object is in constant velocity. The state of equilibrium is obtained when the resultant force acting on the object is zero. This implies that the sum of all forces in the body is zero when it is in equilibrium.
The sum of moments of these forces depends on the location where the moments are calculated. This is because when we take a moment, the distance between the point at which the force is applied and the point where we calculate the moment plays a significant role.
As a result, a moment depends on the position of the point at which the force is applied. In conclusion, the statement "In an equilibrium system, the sum of all forces is zero but the sum of moments of these forces depends on the location where the moments are calculated" is true.
To know more about the equilibrium system, refer here:
https://brainly.com/question/30199874#
#SPJ11
1 pts
Question 13
Which statement best describes the consequences of a plant's leaf cells suddenly losing their
chloroplasts?
The leaf cells would divide rapidly.
The leaf cells would evolve into animal cells.
The leaf cells wouldaccumulate too much food and convert it to starch.
The leaf cells would be unable to convert the sun's energy to make food.
Question 14
1 pts
Answer:
The leaf cells would be unable to convert the sun's energy to make food.
Explanation:
The chloroplast in the leaf are used to make food for the plant. If the leaf loses its chloroplast, the leaf with not be able to use solar energy to manufacture their food.
During photosynthesis, green plants manufacture their food. They use sunlight to cause a reaction between carbon dioxide and water. The sunlight is trapped using chlorophyll present in the leaf. In the absence of the chlorophyll contained in the chloroplast, no solar energy would be generated to cause the reaction to take place.When the diameter of one telescope is twice that of another, how does its collecting area compare?
the larger telescope will produce brighter images compared to the other, smaller one
When the diameter of one telescope is twice that of another, the larger telescope will have four times the collecting area of the smaller one.
The collecting area of a telescope is proportional to the square of its diameter. A telescope's diameter is important because it determines the amount of light that enters the instrument. The amount of light that a telescope can gather is proportional to the square of its diameter. This means that if one telescope has a diameter twice that of another, it can gather four times as much light.
In other words, the collecting area of a telescope is proportional to the square of its diameter. This means that if one telescope has a diameter twice that of another, its collecting area is four times greater than that of the smaller telescope. Therefore, the larger telescope will produce brighter images than the smaller one.
Learn more about telescope at:
https://brainly.com/question/30837195
#SPJ11
A spacecraft is fueled using hydrazine (N2H4; molecular weight of 32 grams per mole [g/mol]) and carries 1640 kilograms [kg] of fuel. On a mission to orbit a planet, the fuel will first be warmed from −186 degrees Fahrenheit [°F] to 78 degrees Fahrenheit [°F] before being used after the long space flight to reach the planet. The specific heat capacity of hydrazine is 0.099 kilojoules per mole kelvin [kJ/(mol K)]. If there is 300 watts [W] of power available to heat the fuel, how long will the heating process take in units of hours [h]?
Answer:
The value is \(t = 689.029 \ hours \)
Explanation:
From the question we are told that
The molar mass of hydrazine is \(Z = 32 g/mol = \frac{32}{1000} = 0.032 \ kg/mol\)
The initial temperature is \(T_i = -186 ^o F = (-186-32) *\frac{5}{9} +273.15 = 152\ K\)
The final temperature is \(T_f = 78 ^o F = (78-32) *\frac{5}{9} +273.15 = 298.7 \ K\)
The specific heat capacity is \(c_h = 0.099 [kJ/(mol K)] = 0.099 *10^3 J/(mol/K)\)
The power available is \(P = 300 \ W\)
The mass of the fuel is \(m = 1640 \ kg\)
Generally the number of moles of hydrazine present is
\(n = \frac{m}{Z}\)
=> \(n = \frac{1640}{= 0.032}\)
=> \(n = 51250 \ mol\)
Generally the quantity of heat energy needed is mathematically represented as
\(Q = n * c_h * (T_f -T_i)\)
=> \(Q = 51250 * 0.099 *10^3 * (298.7 - 152)\)
=> \(Q = 7.441516913 * 10^{8} \ J\)
Generally the time taken is mathematically represented as
\(t = \frac{Q}{P}\)
=> \(t = \frac{7.441516913 * 10^{8} }{300}\)
=> t = 2480505.6377 s
Converting to hours
\(t = \frac{2480505.6377}{3600}\)
=> \(t = 689.029 \ hours \)
The expression for thermal energy and power we were able to find the time necessary to heat the fuel is t = 689 h
To find
TimeThe international measurement system (SI) establishes the fundamental units in the measurement processes, this is defined by convention, giving uniformity in the calculation process and measurement exchange. Before starting the exercise we must reduce the magnitude to the SI system
PM = 32 g / mol (\(\frac{1 kg}{1000 g}\) g) = 32 10-3 kg / mol
T₀ = 5/9 (ºF -32) + 273.15 = 5/9 (186 32) +273.15 = 152.0 K
T_f = 5 * (78 - 32) +273.15 = 298.7 K
c_e = 0.099 kj / mol k (\(\frac{1000J}{1 kJ}\)) = 0.099 10³ J / mol K
The mole is the amount of matter of the international system (SI), the moles exist must be calculated since they are the mass of the compound for this we use a direct rule of proportions, if a mole has more than 32 10⁻³ kg, when moles are 1640 kg
n = \(\frac{m}{PM}\)
n = 1640/32 10⁻³
n = 51.25 10³ mol
If we assume that all energy transfer is thermal, we can use
Q = \(m\ c_e ( T_f - T_o)\)
Q = 51.25 10³ 0.099 10³ (298.7 -152.0)
Q = 7.44 10⁸ J
Power defined by the relationship between work and time
P = \(\frac{W}{t}\)
In this case the thermal work is equal to the heat ( W=Q)
t = \(\frac{Q}{P}\)
t = 7.44 10⁸ / 300
t = 2.48 10⁶ s
They indicate that the answer is given in hours, let's reduce the time
t = 2.48 106 s (1h / 3600s)
t = 6.89 10² h
In conclusion, with the relationship of thermal energy and power, we were able to set the time necessary for the amount of fuel to be t = 689 h
Learn more about thermal energy and power here:
https://brainly.com/question/11278589
a fixed system of charges exerts a force of magnitude 9.0 n on a 3.0 c charge. the 3.0 c charge is replaced with a 4.0 c charge. what is the exact magnitude of the force (in n) exerted by the system of charges on the 4.0 c charge? do not include units with your answer.
The required magnitude of the force exerted by the system of charges on the 4 C charge is calculated to be 12 N.
Magnitude of force is given as 9 N.
Initial charge = 3 C
It is then replaced by 4 C.
The magnitude of the force exerted by the system of charges on the 4 C charge is to be calculated.
We know that, electric field is given by the formula, E = F/q
Placing the values,
E = F/q = 9/3 = 3 N/C.
Now, the charge is 4 C.
The electric field remains the same. Then,
F = 3 × 4 = 12 N
Thus, the exact magnitude of the force exerted by the system of charges on the 4 C charge is 12 N.
To know more about charge:
https://brainly.com/question/14643963
#SPJ4
a weather emergency siren is mounted on a tower, 105 m above the ground. on one hand, it would be a good idea to make the siren very loud so that it will warn as many people as possible. on the other hand, safety regulations prohibit the siren from exceeding an intensity level of 116 db for workers standing on the ground directly below the siren. assuming that the sound is uniformly emitted, what is the maximum power that the siren can put out? maximium power output: 4387.95 tools x10y w how far away from the base of the tower can a person be and still be able to hear the siren? neglect any absorption of sound energy by the air; although, in reality, such absorption would be significant at long distances. maximum audible distance:
The maximum power that the siren can put out is of 4.74 dB.
Given that,
The height of the tower above the ground is, h = 105 m
Sound intensity from the siren is, I = 116 dB
We know that, the maximum intensity of sound allowed is 11.6 B.
Then the intensity of sound in terms of W/m² can be found as follows,
log(I / I₀) = 11.6
I / I₀ = 10¹¹°⁶
I = 10¹¹°⁶ * I₀
⇒ 10¹¹°⁶ * 10⁻¹²
⇒ 10⁻⁰°⁴
At 105 m above the ground the intensity will be 105² times.
Then the intensity at source point = 10⁻⁰°⁴ * 105²
⇒ 0.398 * 105² = 4387.95 W/m²
The energy of sound from the source is given as,
4π* intensity= 4* 3.14* 4387.95 = 55112.65 W/m²
To convert into decibels:
log(55112.65/ 10⁻¹²) = log(55112.65+12) = 4.74 dB
Thus, we can conclude that the maximum power that the siren can put out is of 4.74 dB.
To know more about intensity of sound:
https://brainly.com/question/2485434
#SPJ4
If a stream drops 45 meters in 15 kilometers, what is its gradient? a) 333.3
meters per kilometer b) 0.33 meters per kilometer c) 3 meters per kilometer d) 0.003 meters per kilometer
To calculate the gradient of the stream, we need to determine the change in elevation per unit of horizontal distance.
In this case, the stream drops 45 meters over a horizontal distance of 15 kilometers. To find the gradient, we divide the vertical drop (45 meters) by the horizontal distance (15 kilometers). However, to ensure consistent units, we convert the 15 kilometers to meters by multiplying it by 1,000 (since there are 1,000 meters in a kilometer).
So, the calculation becomes:
Gradient = Vertical drop / Horizontal distance
= 45 meters / (15,000 meters)
= 0.003 meters per meter
This means that for every meter of horizontal distance, the stream drops by 0.003 meters vertically. Simplifying the expression, we can also express it as 3 millimeters (mm) per meter.
Therefore, the correct answer is d) 0.003 meters per kilometer.
Learn more about horizontal distance here:
https://brainly.com/question/11960089
#SPJ11
What determines an object’s mass?
A. Amount of matter
B. Amount friction
C. Amount of force
D. Amount gravity
Answer: D
Explanation:
35.On a cold winter day the sections of a bridge will...Select one:a. expand.b. contract.c. remain the same.d. none of the above.
We know that substances expand with high temperatures and contract with low temperatures, therefore, the bridge will contract and the answer is b.
In the first activity, Vehicle 2 has a greater acceleration than Vehicle 1, but has a less forceful engine. How can this be? Explain in terms of your equation.
Answer:
This can be explained by the equation Force=Mass x Acceleration. Vehicle 2 has a higher acceleration than Vehicle 1, which means it accelerates quicker. However, this increased acceleration is achieved by a less forceful engine. This is possible because Vehicle 2 has a lower mass than Vehicle 1, meaning the same force applied to Vehicle 2 results in greater acceleration. Therefore, Vehicle 2 has a greater acceleration than Vehicle 1 but has a less forceful engine.
Justify why polonium decay is considered a nuclear reaction and not a chemical reaction.
the energy released is greater than a chemical reaction
nuclear reaction: reaction of the nucleus of the atom
chemical reaction: reaction of the atoms
In a competition, an athlete threw a flying disk 145 meters through the air. While in flight, the disk traveled at an average speed of 12.0 m/s. How long did the disk remain in the air?
Hop off this app because im telling the teacher because this is cheating and thats wrong. periodt pooh..
what is the sound intensity that is equivalent to 43.0 db?
The sound intensity that is equivalent to 43.0 dB is equal to \(I = 1.0 * 10^{-4} W/m^2\)
Sound intensity is the energy of a sound wave per unit area, measured in watts per square meter (W/m2). It is related to the strength or amplitude of the wave and is a measure of the sound pressure level. Sound intensity can be used to measure the loudness of a sound, as well as its direction and distance from the source.This is because the decibel scale is a logarithmic scale, so a difference of 10 dB represents a 10-fold increase in sound intensity. Therefore, a sound intensity of 43.0 dB is 10^4 (or 10,000) times larger than a sound intensity of 0 dB, which is equal to \(I = 1.0 * 10^{-4} W/m^2\)
The equation used to calculate this is:
\(I = 10^{\frac{dB}{10}} * 10^{-12} W/m^2\)
or
\(I = 10^{\frac{43.0}{10}} * 10^{-12} W/m^2\)
or
\(I = 1.0 * 10^{-4} W/m^2\)
therefore ,The sound intensity that is equivalent to 43.0 dB is equal to \(I = 1.0 * 10^{-4} W/m^2\)
learn more about Sound intensity Refer:brainly.com/question/19863423
#SPJ4
Can someone help me with these questions?
Mercury
1. What shape is the orbit of Mercury?
2. Why do you think the Sun is not at the center of Mercury’s orbit?
3. What did you notice about the motion of Mercury in its orbit?
4. Click on each highlighted section and record the area. What do you notice about each area?
5. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Earth
1. What is the orbit of the Earth?
2. Is the Sun at the center of the Earth’s orbit?
3. Describe the motion of the Earth throughout its orbit? Does it move at constant speed?
4. Click on each highlighted section and record the area. What do you notice about each area?
5. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Mars
1. What is the orbit of the Mars?
3. 2. Is the Sun at the center of the Mars’s orbit?
4. Describe the motion of Mars throughout its orbit? Does it move at constant speed?
5. Click on each highlighted section and record the area. What do you notice about each area?
6. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Saturn
1. What is the orbit of the Saturn?
2. Is the Sun at the center of the Saturn’s orbit?
3. Describe the motion of Saturn throughout its orbit? Does it move at constant speed?
4. Click on each highlighted section and record the area. What do you notice about each area?
5. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Neptune
1. What is the orbit of the Neptune?
2. Is the Sun at the center of the Nepturn’s orbit?
3. Describe the motion of Neptune throughout its orbit? Does it move at constant speed?
4. Click on each highlighted section and record the area. What do you notice about each area?
5. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Comet
1. What is the orbit of the comet?
2. Is the Sun at the center of the comet’s orbit?
3. Describe the motion of the comet throughout its orbit? Does it move at constant speed?
4. Click on each highlighted section and record the area. What do you notice about each area?
5. Click on the “Toggle Major Axes” button. Record any observation regarding the perihelion distance (Rp) and the aphelion distance (Ra).
Neptune:
The orbit of Neptune is an ellipse.Yes, the Sun is at the center of Neptune's orbit.Neptune moves at varying speeds throughout its orbit, but it is generally faster when it is closer to the Sun.What are the features of the planets?Mercury:
The shape of Mercury's orbit is an ellipse.
The Sun is not at the center of Mercury's orbit because the orbit is not a perfect circle, and the gravitational pull of other planets affects the orbit of Mercury.
Mercury's motion in its orbit appears irregular because it moves faster when it is closer to the Sun and slower when it is farther away.
Earth:
The orbit of the Earth is also an ellipse.
Yes, the Sun is at the center of the Earth's orbit.
The motion of the Earth throughout its orbit is not at a constant speed. It moves faster when it is closer to the Sun (perihelion) and slower when it is farther away (aphelion).
Mars
The orbit of Mars is an ellipse.
Yes, the Sun is at the center of Mars's orbit.
Mars moves at varying speeds throughout its orbit, but it is generally faster when it is closer to the Sun.
Saturn:
The orbit of Saturn is an ellipse.
Yes, the Sun is at the center of Saturn's orbit.
Saturn moves at varying speeds throughout its orbit, but it is generally faster when it is closer to the Sun.
Comet:
The orbit of a comet is an ellipse.
Yes, the Sun is at the center of the comet's orbit.
The motion of the comet throughout its orbit is not at a constant speed. It moves faster when it is closer to the Sun (perihelion) and slower when it is farther away (aphelion). Additionally, the gravitational pull of other planets may affect the motion of the comet.
Learn more about planets at: https://brainly.com/question/24949523
#SPJ1
frequency of sound determines its _____ measured in _____.
amplitude: amplitude of sound wave determines its _____ measured in _____.
Answer:
Loudness of sound is determined by its amplitude.
Loudness of sound is determined by its amplitude.The intensity or loudness of a sound depends upon the extent to which the sounding body vibrates, i.e., the amplitude of vibration. A sound is louder as the amplitude of vibration is greater, and the intensity decreases as the distance from the source increases.
Sammy is combing his hair. his hair starts to stand on end as energy is transferred to its __________ energy store. what one word completes the sentence?
Answer:
Kinetic?
Explanation:
Sammy is combing his hair. During combing, his hair starts to stand on end as energy is transferred to its static electricity store. This energy is transferred due to the friction.
What is Static electricity?Static electricity is developed by the imbalance of electric charges within the surface of a material or between the two materials. The charge remains on the surface until it is able to move away by an electric current or electrical discharge of electrons.
When a person combs his/her hair, negative charged particles i.e., electrons leave the hair and transfer to the plastic comb. The comb which is covered in negatively charged particles, then becomes negatively charged, and the hair are left with a positive charge due to loss of electrons.
Static electricity develops when a person runs a plastic comb through his/her hair, then place the comb near small pieces of paper. The paper pieces are attracted to the comb in contact. This attraction is because of the charged comb that induces an opposite charge in the paper, these opposite charges are attracted to each other, and therefore the paper sticks to the comb.
Learn more about Static electricity here:
https://brainly.com/question/1279104
#SPJ2
Rosa was looking for patterns to help predict the products of chemical reactions. She recorded three similar decomposition reactions in the table.
A 2-column table with 3 rows. The first column labeled reactants has entries 2 N a C l O subscript 3, 2 K C l O subscript 3, 2 L i C l O subscript 3. The second column labeled products has entries 2 N a C l + 3 O subscript 2, 3 O subscript 2 + 2 K C l, empty.
What products should she record in the last row of the table?
2LiCl + 3O2
3LiCl + 2O2
2LiO + 3Cl2
3LiO+ 2Cl2
Answer:
It's A
Explanation:
Because I know it is
The record in the last row should be 2LiCl + 3O2.
What is a chemical reaction equation?A chemical reaction equation has two parts;
The left hand side that contains the reactants.The right hand side that contains the products.The interaction between the atoms of the reactants lead to rearrangement hence products are formed.
For the reaction, the record in the last row should be 2LiCl + 3O2.
Learn more about chemical reaction:https://brainly.com/question/6876669
Click on the graphic below until the correct answer appears.
Which applies to a real machine?
Answer:
there is no graphic
Explanation:
How does the force work
Answer:
A force is a push or a pull.
Explanation:
Example: A boy is pushing a box. He has to push the box to go forward or pull it to go backwards.
Hope this helped
what is the best description of free-body diagram.
Answer:
leekwwjwojowo cliiiodh
Explanation:
Answer:
A free body diagram consists of a diagrammatic representation of a single body or a subsystem of bodies isolated from its surroundings showing all the forces acting on it In physics and engineering, a free body diagram (force diagram, or FBD) is a graphical illustration used to visualize the applied forces, moments,
Explanation:
Hope it helps
A hiker travels 8 km North then 7 km East. What distance
did the hiker travel? What was the hiker's total displacement
Answer:
Explanation:
The hiker has traveled 8 km North and 7 km East, which does not result in a straight line distance. To calculate the total distance traveled, you would need to use the Pythagorean theorem.
The theorem states that in a right triangle, the square of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides. In this case, the hiker's total distance traveled can be calculated as the square root of the sum of the squares of the North and East distances:
distance = √(8^2 + 7^2) = √(64 + 49) = √113 = approximately 10.6 km.
So, the hiker has traveled a total of approximately 10.6 km
A golfer hits a ball at 10.5 m/s at an angle of 25 degrees.
a) How long will the ball be moving?
B) How far will the ball go? C) How high will the ball go?
if the moon rose tonight at 6 pm, then tomorrow it will rise about:
The timing of the moonrise can vary depending on several factors, including your location and the time of year. On average, the moon rises approximately 50 minutes later each day. This is because the moon orbits around the Earth, causing its position relative to our location to change gradually over time.
The moon's rising time is influenced by its orbital motion and the rotation of the Earth. As the Earth rotates on its axis, different parts of the Earth come into view of the moon, causing it to appear to rise and set.
However, it's important to note that the exact time of moonrise can be affected by various factors such as the moon's phase, your latitude, and local terrain. For instance, mountains or buildings on the horizon can delay or obstruct the view of the moon as it rises.
To determine the precise time of the moonrise for a specific location and date, it is recommended to consult reliable astronomical resources, use an online moonrise calculator, or refer to specialized mobile apps that provide accurate moonrise and moonset times based on your location.
By using these resources, you can obtain the most accurate information on when the moon will rise in your area tomorrow or on any other given day.
To know more about Earth refer here
https://brainly.com/question/12041467#
#SPJ11
A 2.0 x 10^3-kilogram car travels at a constant speed of 12 meters per second around a circular curve of radius 30. meters. What is the magnitude of the centripetal acceleration of the car as it goes around the curve?
The magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²
Circular motionFrom the question, we are to determine the magnitude of the centripetal acceleration.
Centripetal acceleration can be calculated by using the formula
\(a_{c} =\frac{v^{2} }{r} \)
Where \(a_{c} \) is the centripetal acceleration
\(v\) is the velocity
and \(r\) is the radius
From the given information
\(v = 12 \ m/s\)
and \(r = 30 \ m\)
Therefore,
\(a_{c} =\frac{12^{2} }{30} \)
\(a_{c} =\frac{144 }{30} \)
\(a_{c} = 4.8\ m/s^{2} \)
Hence, the magnitude of the centripetal acceleration of the car as it goes round the curve is 4.8 m/s²
Learn more on circular motion here: https://brainly.com/question/20905151
mix 4 L of 30°C water is 6 L of 40°C water and you’ll have water at what temperature?
Answer:
dont know
Explanation:
need points
What is the average velocity of an object that moves from 7.3 cm to 4.1 cm relative to the origin in 2.5 s
PLEASE HELP ME I DONT WANT TO FAIL
Answer:1 7/25
Explanation:take the total distance7.3-4.1 then divide by the total time taken
The average velocity of the object is equal to -1.28m/s relative to the origin when it moves for 2.4 seconds.
What is average velocity?Average velocity is a vector quantity and is defined as the change in position (∆x) divided by the time intervals (∆t) in which it occurs. The average velocity can be positive or negative and the S.I. unit of average velocity is m/s.
The average velocity of an object = ∆x/∆t
The average velocity of an object involves only the displacement of the object. However, the magnitude of the displacement of an object can be different from the actual path length.
Given, the displacement of the object = final position - initial position
∆x = 4.1 - 7.3 = -3.2m
The time, ∆t = 2.5 - 0 = 2.5 s
The average velocity of the object = ∆x/∆t = -3.2/2.5 = -1.28 m/s
Therefore, the average velocity of the object is -1/28 m/s relative to origin.
Learn more about average velocity, here:
https://brainly.com/question/862972
#SPJ2
How are the strong winds associated with the tornado in diagram C product
Answer:
there is no diagram, but i can try to help
Explanation:
strong winds bonding together (i.e hot and cold) help form the tornado, depending on the weather depends on how long it can go on, if more hot and cold are feeds into it, it will get faster and last longer. it is just like dust devils, it is wind and dirt mixing to make a tornado, the more wind and dirt the worst it will be
why is saturn almost as large in radius as jupiter despite its smaller mass?
Answer:
Saturn is almost as big as Jupiter despite its smaller mass because Jupiter is a more dense gas giant than Saturn.
Explanation:
What went wrong in this conversion of 50km/hr to miles/min? *
2 points
50km Imile 60 min
hr 1.609 km Ihr
X х
Answer:aka
Explanation:
mekje
PLEASE HELPPP
Force: Adding vectors (find resultant force)
50N north plus 50N west Plus 50N north west
Aluminum hydroxide is a common _________
Answer:base
Explanation:apex