Physics Answers

5.If a glass tube is lowered into a dish of mercury, one finds that inside the tube the level of mercury is depressed below that in the dish. What is the level difference if the diameter of the glass tube is 0.80 mm?

Lying on your back in the grass you observe a jet fly over head at an altitude of H- 1300 m. After a time t 3.5 s from the instant the jet passes over you, you hear a sonic boom. The speed of sound is v 340 m/s. What is the Mach number of the velocity of the jet?

A tennis ball moves 18 meters northward then 22 meters southward then 14 meters northward and finally 28 meters southward.

The motion of a damped harmonic oscillator is described by

A ball is tied at the end of a rope and swings in a circle at a constant speed, doing 60 revolutions a minute. What is the frequency, which period does this movement have?

Particles moves along the x-axis according to the equation x= 3t^2 - 2t + 3, where x is in meters and t is in seconds at t= 3s. Find a.) the position of the particle b.) it's velocity c.) it's acceleration

A simple carousel consists of a flat circular floor that rotates a revolution of 12 s.
a) Calculate all the forces acting on a person standing 4.5 m from the center of the carousel. The person weighs 55 kg.
b) What is the shortest lap time the carousel can have without the person starting to slide? The friction figure between the person's shoes and the floor is 0.45.

Do liquids have elasticity?

Q14. A car is moving with a speed of 50m/s in 10 sec. Another car moving with a speed of 50 m/s it takes
15 sec. Calculate and find out which covers more distance and how much?