How do you find initial velocity?

A spaceship is built to reach a star system 15 light-years away. (a) How fast must the spaceship move (in units of c) so that the round trip time experienced by the crew is 20 years?

The longer coffee sits on a desk, the cooler it becomes. True or False? The length of time on the desk is a function of the temperature of the coffee. A. True B. False

How much force is needed to stop a 80 kg football player if he decelerates at 5m/s?

Examples of how thermal energy transfer by conduction, convection, or radiation.

A mystery element has three isotopes of the following masses and percent abundances: 93.597 amu at 23.63 % abundance, 96.191 amu at 30.53 % abundance, and 95.502 amu. What is the exact atomic mass of the mystery element?

If a cart of 4 kg mass has a force of 8 newtons exerted on it, what is its acceleration?

Why does the liquid thermometer work?

What energy do electrons have when they are farther away from the nucleus?

200 525000 lololo Boat A is 10 km north of a port. Boat B is 5 km east of the same port. Boat A sails in a straight line towards boat B. Work out the bearing on which boat A sails.

Is Li greater than He on the periodic table?