The 8.00-cm long second hand on a watch rotates smoothly.

What is its angular velocity?

What is the speed of the tip of the hand?

Definition of rolling friction

Why do electromagnetic waves not require a medium for travel? A) because electromagnetic waves travel too fast for stationary particles to move with them B) because electromagnetic waves transmit energy without compressing the particles of the

How long will it take you to swim 100 meters if you swim at a speed of 12.5 m/s?

You observe a distant galaxy. You find that a spectral line, resulting from an electron transition in hydrogen, is shifted from its normal location in the visible part of the spectrum into the infrared part of the spectrum. What can you conclude?

Why is the atomic mass usually given as an average (and a decimal) ?

13. How is 0.00069 written in scientific notation? A. 69 x 10-5 B. 6.9 x 104 C. 0.69 x 10-3 D. 6.9 x 10-4

A 1300 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine?.

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz

A measure of how much pulling, or tension, a material can withstand before breaking is - A. hardness. B. brittleness. C. tensile strength. D. malleability.