Other Physics Answers

A cheetah is running at 100. km/hr directly after an antelope which is running at 90.0 km/hr. Assuming both animals run in a straight line, and the antelope is 10.0 m ahead, how long will it take for the cheetah to catch the antelope?

Sound travels through air at a speed of 342 m/s at room temperature. To the nearest tenth of a meter, what is the wavelength of a sound wave with a frequency of 285 Hz?

A wave travelling along a string is describe by y(x,t) = 0.35sin(2.75t – 72.5x).

Determine

i. The velocity with which the wave moves along the string

(2 marks)

ii. The displacement of a particle located at x = 21.5 cm and t = 15.5 sec.

(3 marks)

A car approaches a stop sign going 5 m/s before it comes to a stop. If it does this in 4 seconds, what was its acceleration?

A capacitor has a charge of 9 microcoulomb when connected with a 12 V battery. Determine the capacitance.

What is the charge stored when the voltage across a 25 milliard capacitor is 9 V?

What is the capacitance of a capacitor that stores 50 picocoulomb of charge when connected to a 4 V battery?

How much charge flows from a 12.0 V battery when it is connected to a 9.00 microfarad capacitor?

A sphere has a potential difference between it and the earth of 5 V when charged with 14 nanocoulomb. What is the capacitance?

A car is speeding up and has an instantaneous velocity of 1.0 m/s in the +x-direction when a stopwatch reads 10.0 s. It has a constant acceleration of 2.0 m/s² in the x-direction. (a) What change in speed occurs between t = 10.0 s and t = 12.0 s? (b) What is the speed when the stopwatch reads 12.0 s?