Why sodium & pottasium are kept under kerosine

The radius of the planent venus is nearly the same as that of the earth, but its mass is only eighty percent that of the earth. If an object weighs w on the earth, what does it wiegh on venus

If the power rating on a motor is 10W and 500J of energy is used to move a 20N object, how long is the motor used for?

What is thermal equilibrium?

Sam is driving alond the highway towards saint john. he travels 150km in 3.00hrs. what was his average speed for his trip?

What is the molar mass, in grams, of a mole of an element equal to? A. The number of electrons B. The atomic weight of the element C. The atomic number of the element D. The number of neutrons in the element

The state of matter that has particles that slide by one another

Temperature is usually measured in degrees with a (n)

Two lab carts are pushed together with a spring mechanism compressed between them. Upon release, the 5.0 kg cart repels one way with a velocity of 0.12 m/s. The 2.0 kg cart goes the other way. At what velocity does it travel?

A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a force of 15.0 N. What is the force that the pin exerts on the bowling ball?

an electric clothes dryer has a resictance of 16 Ohms it drawes 15 A of current what is the voltage in volts of the wall outlet that it is pluged into