Scientists test their ideas by

A. Publishing in scientific journals

B. Performing experiments

C. Developing theories

D. None of the above

The speed of water waves decreases as the water becomes shallower. suppose waves travel across the surface of a lake with a speed of 2.0 m/s and a wavelength of 1.5 m. when these waves move into shallow part of the lake, their speed decreases to 1.

What is the variable that changes in response to the manipulated variable?

On a farm, you are pushing on a stubborn pig with a constant horizontal force with magnitude 30.0 n and direction 37.0° counterclockwise from the + x-axis. how much work does this force do during a displacement of the pig that is (a) s s = 15.

Neptune is a planet that ... a) revolves upon its axis and rotates around the Sun. b) revolves upon its axis and rotates around the Milky Way Galaxy. c) rotates upon its axis and revolves around the Sun.

State that energy is conserved in any transfer

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?

Identify the conditions for an elastic collision in a closed system. Check all that apply. Energy is conserved. Velocities may change. Momentum is conserved. Kinetic energy is conserved. Objects stick together after the elastic collision.

When the velocity of a mass on a spring is zero, the acceleration is at

Which is a disadvantage of using wind as an energy source? Check all that apply. It may be unreliable. It is not naturally occurring. It produces a lot of waste. It requires wires to carry electricity. It generates large amounts of electricity.