Physics Answers

What is first maxwell equation.

A motar car moving with velocity 90km-1 sees a pedestrian crossing the road 100m ahead and applies the brakes. The brakes produces a retardation of 5ms-2. If the driver applies brakes 1s after he sees the pedestrian (reaction time = 1s), what is the distance to the pedestrian when the car stops?

A 0.60-kg block attached to a spring with force constant 130 N/m is free to move on a frictionless, horizontal surface. The block is released from rest when the spring is stretched 0.13 m. At the instant the block is released, what is (a) the force on the block and (b) its acceleration

1- You are standing on an icy surface. Your friend throws a ball with 0.4 kg at 10 m/s velocity. If your mass is 70 kg. Calculate your velocity

a- When you hold the ball.

b- When the ball hits you and bounces back 7m/s.

2- A 50kg woman stands up in a 70kg canoe 5m long. She walks from a point of 1.m from one and to a point 1.0 m from the other end. If the resistances are ignored how far is the canoe moving during this process?

Please, Expert, I need your solution to this problem. Thank you

 Two systems A and B are arranged so that their total volume is constant, but their individual volumes can change. Calculate the standard deviation of fluctuations in the volume in system A for constant energy. (Hint: see section 4.5 for the analogous calculation of the fluctuation ill energy.)

A conker held still by a string. Explain why the conker is at rest

According to the figure below an experiment has been conducted where some of the most important components in the experiment can be seen below.

c) All the groups said that they observed rings with smaller diameter when they increased the acceleration voltage. Explain this qualitatively.

e) All groups said that they observed two rings of different of different size on the screen, that is to the far right in the figure above. Explain why with the help of the figure below and also with some formulas from the book why you could see two rings of different sizes.