What's the efficiency of a car that uses 400,000 J of energy from gasoline to make 48,000 J of kinetic

energy?

A band director instructs students to play a pitch louder. How will the sound wave change when the band plays the same pitch louder? The speed of the sound wave will increase. The frequency of the sound wave will increase.

Consider an unknown charge that is released from rest at a particular location in an electric field so that it has some initial electric potential energy.

Why are most organelles surrounded by membranes

Why does the temperature decreases at higher altitudes

Uma pessoa exercita-se em uma esteira rolante manual. Ela andou 20 minuots com velocidade de 5.4km/h e consumuiu 200 quilocalorias. Qual a distancia percorrida por essa pessoa se estivesse na rua? Qual seu deslocamento em relação ao solo?

For resonance to occur, the object must experience a frequency equal to its what? amplitude period wavelength natural frequency

Rasheed runs a football 10 meters east, turns and runs the football 6 meters west. If his velocity during this run is found to be 3 meters/second, how long does this take Rasheed to complete this run?

What is the approximate weight of a 20-kg cannonball on the moon if the acceleration due to gravity is 1.6m/s^2

A man consumes 2245 kcal of food in one day, converting most of it to maintain body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate?

If an eagle and a bumblebee are traveling at 8km/hr which has more momentum?