PHYSICS MIDDLE SCHOOL

A teacher points to a microscope sitting on the desk. Which conclusion best explainswhy the microscope is not moving?

Answers

Answer 1

Answer:

Answer:

The object is sitting

Explanation:

Therefore the object cannot be in current motion as no force has been acted upon it (exept gravitational force)

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What process, driven by heat generated from within the Earth's core, occurs in the mantle and is a primary cause of plate tectonics?A.faulting
B.mantle convection
C.subduction
D.trench formation

Answers

Answer:

The correct option is (B)mantle convection

Explanation:

Tectonic plates at the earth's surface move because of the intense heat in the Earth's core. this heat causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell and producing a movement called mantle convection which is the slow creeping motion of Earth's solid silicate.

The answer is B. Mantle convection.

A 4.8-kilogram ball moving at 8 m/sec to the right collides with a 1.4-kilogram ball at rest. After the collision, the 4.8-kilogram ball moves at 4.8 m/sec to the right. What is the velocity of the 1.4-kilogram ball?m/s

Answers

The final velocity of the 1.4 kg ball is 11.0 m/s to the right

Explanation:

We can solve this problem, by using the law of conservation of momentum: in fact, the total momentum of the two balls must be conserved before and after the collision. Therefore, we can write:

$p_i = p_f\nm_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2$

where:

$m_1 = 4.8 kg$ is the mass of the first ball

$u_1 = 8 m/s$ is the initial velocity of the first ball (taking right as positive direction)

$v_1 = 4.8 m/s$ is the final velocity of the first ball

$m_2 = 1.4 kg$ is the mass of the second ball

$u_2 = 0$ is the initial velocity of the second ball (it is at rest)

$v_2$ is the final velocity of the second ball

And solving the equation for v2, we find:

$v_2 = (m_1 u_1-m_1v_1)/(m_2)=((4.8)(8)-(4.8)(4.8))/(1.4)=11.0 m/s$

So, the 1.4 kg ball moves at 11.0 m/s to the right.

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

A bulldozer does 45,000 joules of work to push a boulder a distance of 30 meters.How much force is applied to push the?

Answers

Answer:

1500N

Explanation:

we have ,

w= f*d

45,000 =f * 30

f=45000/30

f=1500N..

An organism's scientific name consists of...

Answers

Answer:

binomial nomenclature.

Explanation:

This means that an organism's scientific name is a combination of two terms.

The first is the name of the organism's genus, and the second is the name of the organism's species

together the genus and the species create the name of a single organism.

Make labeled diagrams of badminton court and badminton racket.

Answers

Answer:

labeled diagrams for badminton court and badminton racket

Explanation:

here are pictures for badminton court and racket

A push or pull on an object

Answers

a pull because you can get the object

Other Questions

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Friction in machines is commonly reduced by using what?

A car is strapped to a rocket (combined mass = 661 kg), and its kinetic energy is 66,120 J.At this time, the rocket runs out of fuel and turns off, and the car deploys a parachute to slow down, and the parachute performs 36,733 J of work on the car.What is the final speed of the car after this work is performed?

Two precautions in images of a convex lens