What do the arrows in food chains represent

A car with a mass of 1,500 kg doubles its speed from 50 km/h to 100 km/h. by how many times does the kinetic energy of the car increase

A feather will fall through the air more slowly than a brick because of air resistance, gravity, inertia or, momentum

The specific heat of copper is 0.385 j/g•°c. Which equation would you use to caculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°c to 29°c?

List and describe the forces that act on a block as it moves down the ramp at constant speed.

The main greenhouse gases in the atmospheres of the terrestrial planets are

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?