Physics High School

can some one explain me big bang theory ?​

Answers

Answer 1

Answer:

The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

Related Questions

a 2.00kg cart travelling north at 4.00m/s collides head on with a 1.00kg cart travelling south at 8.00m/s. what is the magnitude of the total momentum of the two carts after the collision

Answers

Answer:

16 kgm/s

Explanation:

Step one:

given data

m1= 2kg

v1= 4 m/s

m2= 1kg

v2= 8m/s

Required

The magnitude of momentum after impact pafter

Momentum is the product of a moving object's mass and velocity

Step two:

Pa= m1v1+m2v2

Pa=2*4+1*8

Pa=8+8

Pa=16 kgm/s

A 2.0 kg block is pulled across a horizontal surface by a 15 N force at a constant velocity. What is the force of friction acting on the block?

Answers

Answer:

The force of friction acting on the block has a magnitude of 15 N and acts opposite to the applied force.

Explanation:

Net Force

The Second Newton's law states that an object acquires acceleration when an unbalanced net force is applied to it.

The acceleration is proportional to the net force and inversely proportional to the mass of the object.

If the object has zero net force, it won't get accelerated and its velocity will remain constant.

The m=2 kg block is being pulled across a horizontal surface by a force of F=15 N and we are told the block moves at a constant velocity. This means the acceleration is zero and therefore the net force is also zero.

Since there is an external force applied to the box, it must have been balanced by the force of friction, thus the force of friction has the same magnitude acting opposite to the applied force.

The force of friction acting on the block has a magnitude of 15 N opposite to the applied force.

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