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3 years ago

9

The chart shows masses and velocities of four objects. Which lists the objects in order, from least to greatest momentum?

2 answers:

melamori03 [73]3 years ago

7 0

Answer: d

Explanation:

damaskus [11]3 years ago

6 0

Momentum is the product of mass x velocity.

p = mv

Where: p = momentum
m = mass
v = velocity

Now you can answer your question by finding the momentum of each:

p = mv
p(w) = 12 x 5 = 60
p(x) = 15 x 8 = 120
p(y) = 18 x 2 = 36
p(z) = 28 x 10 = 280

With that you can now arrange them in ascending order (least to greatest):
Y < W < X < Z

Your answer is D.

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vekshin1

Answer:

80 km

Explanation:

Since 240 divided by three is 80, the velocity the car is traveling at is 80 kilometers per hour.

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DochEvi [55]

In order to find the efficiency first we will find the Change in Potential energy of the small stone that robot picked up

First we will find the mass of the stone

As it is given that stone is spherical in shape so first we will find its volume

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$V = \frac{4}{3}\pi *(\frac{0.06}{2})^3$

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Now it is given that it's specific gravity is 10.8

So density of rock is

$\rho = 10.8 * 10^3 kg/m^3$

mass of the stone will be

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$m = 10.8* 10^3 * 1.13 * 10^{-4}$

$m = 1.22 kg$

now change in potential energy is given as

$\Delta U = mgH$

here

g = gravity on planet = 0.278 m/s^2

H = height lifted upwards = 15 cm

$\Delta U = 1.22* 0.278 * 0.15$

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t = time = 12 s

$E = 10* 1.83 * 10^{-3} * 12$

$E = 0.22 J$

Now efficiency is defined as the ratio of output work with given amount of energy used

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sergij07 [2.7K]

Answer: current I = 0.96 Ampere

Explanation:

Given that the

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Power is the product of current and voltage. That is

P = IV ...... (1)

But voltage V = IR. From ohms law.

Substitutes V in equation (1) power is now

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