HELPPPPPPPPP PLEASEEEEEE On this graph, which material has the lowest density? Density comparison Question 4 options: red yellow green blue

Answer:

If the force on a cart doubles, the acceleration of the cart doubles.

Explanation:

For this problem, we need to consider the following equation:

Force = Mass x Acceleration

We can reasonably assume that the cart will have constant mass in the given force system.  With this assumption we can say the following relationship:

Force is directly proportional to Acceleration within the system.

Given that our force on the cart is doubled, then our acceleration of the cart must also be doubled.  You can mathematically express this as follows:

F = MA

2F = M * 2A

Hence, if force doubles, the acceleration doubles.

Cheers.

Answer:

Speed describes how far an object moves in a given amount of time (for example, miles per hour).

Explanation:

Answer:

The spring constant,k is measured in newtons per meter

Answer:

Answer:

weight

Explanation:

the reason is because I am invteble

Answer:

Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

Answer:

Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.

Explanation:

Answer:

when an object has more velocity, it tends to have less potential energy and more kinetic energy.

Explanation:

kinetic energy is the energy of movment and velocity helps to describe movement

Answer:

The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]

The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]

Explanation:

Radius of sphere = 5 cm

Radius with uncertainty r'= [tex]5 \pm 0.05[/tex]

Volume of sphere = [tex]\frac{4}{3} \pi r^3=\frac{4}{3} \pi (r')^3[/tex]

[tex]V=\frac{4}{3} \pi (r')^3\\\frac{dV}{dr'}=4\pi (r')^2[/tex]

Where dV is the uncertainty in volume

dr' is the uncertainty in radius

[tex]dV=4\pi (r')^2 dr'\\dV=4 \pi (5)^2(0.05)\\dV=15.70\\V=\frac{4}{3} \pi (r')^3=\frac{4}{3} \pi (5)^3=523.59[/tex]

The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]

The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]

Answer:

Explanation:

a) Using the equation of motion

S = ut + 1/2gt²

S is the distance of fall

g is the acceleration due to gravity

t is the time taken

Given S = 12.0m, g = 9.81m/s^2, un= 0m/s

12 = 0+1/2(9.81)t²

12 = 4.905t²²²

t² = 12/4.905

t² = 2.446

t = √2.446

t = 1.56secs

b) To determine how fast is the frog falling at this point, we need to calculate the speed of the frog. Using the equaton v = u+gt

v = 0+9.81(1.56)

v = 15.34m/s

Hence the frog is falling at the rate of 15.34m/s

If a  car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.

Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.

As for the given problem, we have to find out the mass of the car if the car moving at 30 m/s has 900 kJ of kinetic energy.

Kinetic energy = 1 / 2 m v²

         900000 = 0.5 × m × 30²

                    m = 1000 / 0.5

                        = 2000 kilograms

Thus, If a  car moving at 30 m / s has 900 kJ of kinetic energy, then the mass of the car would have been 2000 kilograms.

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Answer:

C

Explanation:

It says is it a good idea the person so 1 person can say no and the other one can say yes so it is asks for a opinion

A question that asks for an opinion is as follows:

Thus, the correct option for this question is C.

An opinion may be defined as a type of viewpoint, judgment, or statement that is not conclusive, rather than facts, which are true statements. It may vary from person to person, topic to topic, and condition to condition.

The opinion of any individual belongs or relates to one particular person rather than to other people. For example, in this given scenario, some reply to the question with a yes answer. In a manner, it is definitely a good idea to try to establish human colonies on Mars. While some categorized themselves on no side.

Therefore,  the correct option for this question is C.

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Answer:

The ramps length, height, degree, and the weight of the car.

Explanation:

Answer:

I think they need the slope of the ram(degree) .

& current gravitational acceleration

& the length of the ram and also l don't think mass of the cars are not needed becoz the acceleration of the cars are given by its,

Gravitational acceleration * sin( slope).

So then use that in v^2=u^2+2as equation.

s for length

a for acceleration

v for end velocity

u for start velocity

Answer:

Explanation:

According to me, humans visiting an alien planet is more likely. This is because the allien planets may not have higher levels of technology.

Whereas in today's world, the technology have come to aqquire a very high position. So it likely that humans could visit the alien planets because of the technology evolved by them.

Hope this helps

plz mark as brainliest!!!!!!

Answer:

the answer is c testable

Answer:

800 meters

Explanation:

4 x 200 is 800 meters.

Answer:

Where speed limit of speed camera is 50 km/h.

Explanation:

Speed cameras work on the principal that photos reflected from the moving car have a higher or lower frequency. This is the Doppler principal. In a  car traveling at the speed of light, the waves/particles will not be able to catch up with that car thus no photon will reflect back to the receiver/speed camera thus no speed will be record. Such a speed is impossible to achieve due to the amount of infinite energy expenditure required. This means if the speed is higher and approaching that of light, the frequency of reflected photons will be very high causing high amounts of energy that could damage the speed camera and cause detection. When the car travels at a higher speed, the photos frequency is high thus more energy they will carry and high chances of the vehicle being detected. This means the time interval of photos taken will be smaller.

Answer:

True

Explanation:

Answer:

A

Explanation:

Answer: C

Explanation: Because if magma wasn't to be forced on earth's surface, the magma would come on earth and burn earth down.

Answer:

Probably Trent or something like that

Answer:

Trent or tranthjhikjhjhuiivd

Answer:

Explanation:

The answer is C because the liquid has to turn into gas which the liquid has volume and a variable shape. Gas does not have volume or shape.

An object has a fixed volume and a variable shape before it changes state. After the change, it can change in both shape and volume then the change of state occurred was liquid to gas

Anything which has mass and occupies spaces is known as matter ,mainly there are four states of matter solid liquid gases, and plasma.

These different states of matter have different characteristics according to which they vary their volume and shape.

Liquid has a fixed volume but it can change its shape to any form but gases can change their volume as well as shape, therefore the correct answer is C.

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Answer:

Measurement scales are used to categorize and/or quantify variables. This lesson describes the four scales of measurement that are commonly used in statistical analysis: nominal, ordinal, interval, and ratio scales.

Hope I helped let me know if I didn't

lol i’m in your physical science class what was the answer

Answer:

4.2 km

Explanation:

CAR A(velocity =20m/s to East)

In 1s, it covers 20m.

In 120s(2min),it covers20*120m.=2400m=2.4 km

CAR B(velocity =15m/s to west)

In 1s, it covers 15m.

In 120s, it covers 15*120m.=1800m=1.8km

Now, distance between the two cars after 2 minutes =2.4 km+1.8 km=4.2km

Explanation:

(a) What is the maximum height the arrow will attain?

Given:

v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s

vᵧ = 0 m/s

aᵧ = -9.8 m/s²

Find: Δy

vᵧ² = v₀ᵧ² + 2aᵧΔy

(0 m/s)² = (24.5 m/s)² + 2 (-9.8 m/s²) Δy

Δy = 30.7 m

(b) The target is at the height from which the arrow was shot. How far away is it?

Given:

Δy = 0 m

v₀ᵧ = 54 sin 27.0° m/s = 24.5 m/s

aᵧ = -9.8 m/s²

Find: t

Δy = v₀ᵧ t + ½ aᵧt²

0 m = (24.5 m/s) t + ½ (-9.8 m/s²) t²

t = 5.00 s

Given:

v₀ₓ = 54 cos 27.0° m/s = 48.1 m/s

aₓ = 0 m/s²

t = 5.00 s

Find: Δx

Δx = v₀ₓ t + ½ aₓt²

Δx = (48.1 m/s) (5.00 s) + ½ (0 m/s²) (5.00 s)²

Δx = 241 m

Answer:

what is it about

Explanation:

Answer:

Note: These answers are based off of sense and educational quessing, as I cannot do the experiment.

Question 1:

The balloons did not balance.

Question 2:

The bigger balloon tipped the scale down.

Question 3:

Yes, it validated that gas does has mass, as the bigger balloon weighed down the scale.

Question 4:

N/A

Answer:

Deposition

Explanation:

I took the quiz

Deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

The term phase change simply means a change from one state of matter to another. Phase changes are often accompanied by a loss or gain in energy depending on what process occurred.

The phase change deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

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