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2 years ago

A car of mass 1200 kg, moving with a speed of 72 mph on a highway,

Physics

1 answer:

Keith_Richards [23]2 years ago

8 0

momentum(p) = mass(m) x velocity(v)

KE = kinetic energy = 1/2 mv²

the ratio of the momentum of the SUV to that of the car

$\tt \dfrac{mv}{1.5m\dfrac{2}{3}v }=1:1$

b. the ratio of the KE of the SUV to that of the car

$\tt \dfrac{1/2\times mv^2}{1/2\times 1.5m\times (\dfrac{2}{3}v )^2}=\dfrac{mv^2}{1.5m\dfrac{4}{6}v^2 }=1:1$

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A Young's interference experiment is performed with blue-green laser light. The separation between the slits is 0.500 mm, and th

Tamiku [17]

Answer:

λ = 509 nm

Explanation:

In order to calculate the wavelength of the light you use the following formula:

$y=m\frac{\lambda D}{d}$ (1)

where

y: distance of the mth fringe to the central peak = 3.30 mm = 3.30*10^-3 m

m: order of the bright fringe = 1

D: distance from the slits to the screen = 3.24 m

d: distance between slits = 0.500 mm = 0.500*10^-3 m

You first solve the equation (1) for λ, and then you replace the values of the other parameters:

$\lambda=\frac{dy}{mD}\\\\\lambda=\frac{(0.500*10^{-3}m)(3.30*10^{-3}m)}{(1)(3.24m)}=5.09*10^7m\\\\\lambda=509*10^{-9}m=509nm$

The wavelength of the light is 509 nm

8 0

4 years ago

If Jupiter were 10 times more massive, it would generate nuclear fusion in its core and be a star instead of a planet. If Jupite

OverLord2011 [107]

Answer:

False

Explanation:

Let me put it in numbers. Jupiter has mass of 1.898x10^27Kg, make it 10 times as much and it becomes 1.898x10^28 Kg.

TRAPPIST-1, smallest star ever found has Mass of 1.77x10^29Kg, that is around 93 times larger than the mass of Jupiter.

Clearly 10 times as much is not enough to generate fusion reaction and become a star, in theory Jupiter must be at least 85 times larger than it's current mass to be able to generate fusion reaction and become a star.

So i think we can conclude that if Jupiter were to have 10 times of its own mass, it would not become a star, therefore the given statement is False.

5 0

3 years ago

Read 2 more answers

A bumblebee has a charge of 1.0 µC is placed 10.0 cm from a charge of 2.5 µC. What is the magnitude of the electric force?

allochka39001 [22]

Answer:

F = 2.25 N

Explanation:

Given that,

Charge 1, $q_1=1\ \mu C = 10^{-6}\ C$

Charge 2, $q_2=2.5\ \mu C=2.5\times 10^{-6}\ C$

Distance between charges, d = 10 cm = 0.1 m

We need to find the electric force between charges. The formula that is used to find the electric force is given by

$F=\dfrac{kq_1q_2}{d^2}\\\\F=\dfrac{9\times 10^9\times 10^{-6}\times 2.5\times 10^{-6}}{(0.1)^2}\\\\=2.25\ N$

Hence, the force between charges is 2.25 N.

6 0

3 years ago

This mathematical model describes the changes that occur in a sample of

True [87]

The correct answer is D. The movement of the molecules will gradually increase.

Explanation:

At the beginning of the model the state of matter of the water is solid, in this, particles have a defined arrangement and are together, which stops particles from moving freely and only allows them to vibrate. However, as the substance is heated the thermal energy (heat) increases in the sample, this causes particles to move more and the arrangement of it changes. Due to this, when the ice melts and there is liquid water particles move more than in solid states, which makes ice lacks a defined shape. Moreover, as the heat continues to increase the thermal and kinetic energy (movement) increases, indeed in gas state (water vapor) particles will move freely. This means the movement or kinetic energy in particles gradually increases in the model.

8 0

3 years ago

Kelly sits on a rock. Her weight is an action force. What is the reaction force?

Dmitrij [34]

The force ffrom the ground that holds the rock up and prevents her from falling through the gound, unless the ground breaks.

4 0

4 years ago