How many copies of H2O are required to balance this chemical equation? CH4 + 2O2 CO2 + __H2O A. 1 B. 2 C. 3 D. 4

Features of a projectile motion

Name one contact force and one force that acts through a force field

What does a water wave transfer

A 66-kg fellow stands on a digital scale in an elevator that accelerates upwards from rest to 4.5 m/s in 2.00 s.

A 12-V battery is connected to a device and 24 mA (24 x 10' Amps) of current flows through it. If the device obeys Ohm's law, how much current will flow when a 24-V battery is used?

The path of a beam of light from the sun to your eye when you are wearing sunglasses

The element that is most abundant in earth is

What is true about coal as an energy source

A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop? A) 36 m B) 72 m C) 140 m D) 210 m

Which of the following best explains why an explosive charge in a cannon can cause a cannonball to fly out of the cannon with a high velocity? A. because chemical potential energy can convert to gravitational potential energy B.