When a piece of wood burns, it makes heat, light, and ash. Therefore, it is an example of what type of change

Explain how the earth is round and not flat

A lightweight string is wrapped several times around the rim of a small hoop. If the free end of the string is held in place and the hoop is released from rest, the string unwinds and the hoop descends.

What is the fundamental cause of air circulation in earths atmosphere

A test charge is placed at a distance of 3.5 meters from a charge of 8.7 x 109 coulombs. What is the electric field strength at the test charge? (k 9.0 x 109 newton-meter2/coulomb)

An ice boat is coasting along a frozen lake. Friction between the ice and the boat is negligible, and so is air resistance. Nothing is propelling the boat.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?