A train is moving west with an initial velocity of 20m/s accelerates at 4m/s for 10 seconds during this time the train moves a distance

A plane travels 350 km south along a straight path with an average velocity of 125 km/h to the south. The plane has a 30 minute layover, and then travels 220 km south with an average velocity of 115 km/h to the south.

As the temperature increases the number of effective collisions between reacting particles in a chemical reaction A. initially increase, them decreases B. Decreases C. Initially decreases, then increase D. Increases only

The force that pulls objects toward each other

In which way does Stephen Hawking use mathematics in his work?

Which of the following has exactly 4 significant figures A 0.045 B 32.110 C 370.0 D 4500

A measure of the energy of motion of the particles in a substance is its

What is the final velocity of the combined bumper cars A 225 kg red bumper car is moving at 3.0 m/s. It hits a stationary 180 kg blue bumper car. The red and blue bumper cars combine and hit a stationary green bumper car of mass 150 kg.

0.4-L glass of water at 20°C is to be cooled with ice to 5°C. The density of water is 1 kg/L, and the specific heat of water at room temperature is c = 4.18 kJ/kg·°C. The specific heat of ice at about 0°C is c = 2.11 kJ/kg·°C.

Regions in a sound wave where particles are farthest apart are called

What will happen to thermal condictivity of a substance if its thickness is doubled? Also give reason.