A train travels 90 kilometers in 2 hours, and then 66 kilometers in 2 hours. What is its average speed?

What is the number of waves per second in a radio signal? a. frequency b. interval c. recess d. velocity

If you combine a weak acid with an equal amount of a strong base, will the solution be acidic or basic?

Sodium = Na Water = H2O Gold = Au Silicone = Si Boron = ? What is the symbol for Boron?

Equal number of protons in an atom (two word)

A baseball pitcher loosens up his pitching arm. He tosses a 0.20-kg ball using only the rotation of his forearm, 0.28 m in length, to accelerate the ball.

Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.

The correctly balanced equation for H202 - H2O + O, is A) H202 - 2H2O + O2 B) H302 - H20+20, C) 2H, 02 - - 4H20 + 0, D) 2H, 02 - 2H30 + 0,

What happens to the wavelength of a wave if you increase the frequency?

In a transverse wave, the particle motion is what to wave motion? A. perpendicular B. parallel

Which agent of weathering breaks down limestone statues?