Physics Answers

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

. A sinusoidal wave travels along a string. The time for a particular point to move from

maximum displacement to zero is 0.170 s. What are the (a) period and (b) frequency? (c)

The wavelength is 1.40 m. what is the wave speed?

A 100N weight rest on a 30 degrees inclined plane. Neglecting friction, how much pull must one exert to bring the weight up the plane

If the molecular theory of matter is changed or discarded in the future, will the concept of temperature still remain?

a 25 N block is pushed up a plane inclined 30° with the horizontal by a force F of 46 N applied parallel to the plane. The block moves 3.0 m up the plane. the coefficient of friction is 0.2 find the work done by: a. gravity b. force c. friction force d. normal force

An object travels around a circle 10.0 full turns in 2.5 seconds. Calculate the angular displacement , theta in radians

How fast must a 58 kg mountaineer climb a hill that has a slope of 16° to come up with a power output of 1.0 hp?

Jane is walking at such speed o that her kinetic energy is 20 J. What is her speed? It started to rain. Jane runs at a rate of 4.2 m/s. Find the change in her kinetic energy. Jane has a mass of 50 kg.