What is kinetic energy of a 30 kg child running at 7mph

During takeoff, an airplane climbs with a speed of 130 m/s at an angle of 47 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead.

Why is electric switches and boards are made up of plastic

A true hero is the unifying force in the diverse society

What is a risk assessment

An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object? 0.25 m/s2 4 m/s2 60 m/s2 100 m/s2

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?

What would a sound wave do if it traveled from a gas to a liquid? •stop •stay the same speed •slow down •speed up

A rock is thrown downward into a well that is 7.92 m deep. Part A If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.

Which drum would make a sound that fades away faster - one that makes a loud sound or one that makes a more mellow sound Why?

Which of the following is NOT a way to increase the solubility of a solid in water? A. crushing the solid B. shaking the mixture of solid and water C. raising the temperature of the water D. letting the mixture stand still a long time