Friction between two flat surfaces can be divided into two categories. What are the two most common kinds of friction?

Air resistance

Fluid

Static

Kinetic

An automobile engine has an efficiency of 19.0%. If it produces 23.0 kJ of mechanical work per second, the heat rejected per second from the engine is closest to: (a) 77.0 kJ (b) 81.5 kJ (c) 86.5 kJ (d) 92.0 kJ (e) 98.1 kJ

A soccer ball collides with another soccer ball at rest. The total momentum of the balls A. is zero. B. increases. C. remains constant. D. decreases.

How does current change for resistors in series? what is the equivalent resistance for resistors in series? answers?

If you were trying to kill a fish with a laser beam, would you aim where you see the fish?

To consume means to eat and drink

The potential difference between the terminal of an electrical heater is 60v when it draw a current 4A fron the source. What current will the heater draw if the potential difference is increased to 120v?

Which answer choice best explains why nuclear reactions release more energy than chemical reactions? Electrostatic forces of repulsion are thousands of times stronger than gravitational forces.

A train's mass is 18181.81 kg. What is its weight?

a 3.0m long frictionless pendulum swings with a maximum angluar displacement of 10 degree from the vertical. at its lowest position the kinetic energy of the pendulum is 20.0j what is the potential energy of the pendulum when the kientic energy is 5.

How are hypotheses and theories related to each other?