Which of the following describe the brightness of a star as we see it from earth?

A: absolute magnitude

B: Parallax Magnitude

C: Apparent Magnitude

You have a 1.55 kg block of silver at room temperature of 20 °C. Silver melts at 962°C. How much heat energy would be needed to just melt the silver? (Hf (silver) = 111 kJ/kg). Show all work. Answer:

Caculate the acceleration of an airplane that goes from 0 knots to 400 knots in 8 seconds

A raw egg can be dropped from a third-fl oor window and land on a foam-rubber pad on the ground without breaking. If a 75.0-g egg is dropped from a window located 32.0 m above the ground and a foam-rubber pad that is 15.0 cm thick stops the egg in 9.

A 55.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300. What horizontal force must be applied to the box for it to start sliding along the surface?

A piece of Nichrome wire has a radius of 7.1 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.20*102 W of power when connected to a voltage source of 110 V.

The amount of force needed to keep a 0.1kg basketball moving at a constant speed of 6 m/s on frictionless ice is ___ N

What three forms of kinetic energy can a polyatomic molecule have?

A parachutist bails out and freely falls 50 m. Then the parachute opens, and thereafter she deceler - ates at 2.0 m/s2. She reaches the ground with a speed of 3.0 m/s.

Why the weight of a body decreases with increases in distance from the earth's surface

On a fishing trip Justin rides in a book 12 km south. The fish aren't biting so they go for kilometers west. They then follow a school of fish 1 km north. What distance did they cover? What was their displacement?