Which of the following tools is used to mark the spot where a hole is to be drilled in a piece of metal?

a. hacksaw

b. center punch

c. screwdriver

d. cold chisel

The hydrogen atoms in a star are also moving at high velocity because of the random motions caused by their high temperature.

You new motorcycle weighs 2540 n. the acceleration of gravity is 9.8 m/s 2. what is its mass? answer in units of kg.

Describe how the Fermi level changes with donor level, temperature and contact with p and n type semiconductors

This traction loss occurs in the rear wheels of a vehicle. a) Braking-induced traction loss b) Acceleration-induced traction loss c) Front wheel traction loss (skid) d) Rear wheel traction loss (skid) e) Driver-induced skids

What layer of the atmosphere is made mostly of hydrogen and helium?

What type of material is inside the holes in an electrical outlet?

A fisherman noticed that a float makes 30 oscillations in 15 seconds. The distance between two consecutive crests is 2 m. What is the period and frequency of the wave? What is the wave speed?

A small spaceship with a mass of only 2.6 ✕ 103 kg (including an astronaut) is drifting in outer space with negligible gravitational forces acting on it. If the astronaut turns on a 12 kW laser beam, what speed will the ship attain in 1.

What will be the acceleration of a skydiver when air resistance builds up to 86% of her weight? assume the acceleration due to gravity is 10 m/s 2. answer in units of m/s 2?

A 255 g lead ball at a temperature of 81.6°C is placed in a light calorimeter containing 153 g of water at 22.3°C. Find the equilibrium temperature of the system.