Other Physics Answers

A paper is rubbed with a wood and the fur acquires a charge of magnitude 5.26nC.

a. Did the paper gain or lose electrons?

b. How many electrons were transferred during the process?

c. What is the change in the mass of the paper?

d. What is the change in the mass of the wood?

In the process of rubbing the lenses of the eyeglasses, 6.28x1010 electrons were transferred.

a. What is the charge of the lenses and the nylon cloth?

b. What is the change in their masses?

An object accelerates at 2.2 m/s² for 3.0 seconds. If the final velocity is 15m/s what was the initial velocity?

If the torque required to loosen a nut that holds a wheel on a car has a magnitude of 58 N*m, what force

must be exerted at the end of a 35 cm lug wrench to loosen the nut when the angle of the wrench is 560?

A boy who weighs 800 N and his 475 N little sister are 3.5 meters apart from each other on a balanced see-

saw.

a) What is the mass of the little sister?

b) How far away is the little sister sitting from the center of the see-saw?

A wave is modeled by the wave function.

y(x,t)= (0.30m)sin[2pi/4.50m(x-18.00m/st)].

What are the amplitude,wavelength,wave speed, period, and frequency of the wave?

A goat and a dog are in a road race. The goat moves the entire 1000m at the speed of 0.2m/s. The dog runs the first 200m at 2m/s, stops to rest for 45minutes and then continues the race to finish the last 800m with an average speed of 3m/s.

Determine the amount of heat that must be removed from 1 kg of water at 40°C to convert it to ice at -5°C.

(Obtain any relevant data that you need from the internet. Cite the source of that data in your answer)

Vector a is 6m due north, b is 4 at an angle of 30 degree Celsius above the horizontal what is the resultant vector?

A person wants to replace his vehicle’s tyres to a larger diameter/thickness. The driver askes your suggestion if there would be any changes to his vehicle after the replacement of the tyres. Provide your knowledgeable opinion on the changes that would occur if the driver were to change his vehicle’s tyres from a diameter of 175 mm to 215 mm. Your answer should exemplify the following changes to the vehicle;

I. Centripetal force

II. Torque

Acceleration