Find the weight of 100 ft3 of water

Which change would cause the largest increase in a mountain climber's gravitational potential energy?

Un motociclista al cabo de 12 segundos, adquiere una velocidad de 9 m/s y 6 segundos más tarde consigue una velocidad de 15m/s. Ya que viaja por una línea recta sobre una calle inclinada. Consigue la distancia. (con procedimiento por favor)

Planet Z has diameter 1.8 * 107 m. On the planet's surface, the acceleration due to gravity is 19.5 m/s2. What is the mass of the planet? Note: The constant of universal gravity (G) equals 6.674 * 10-11 N ⋅ m2/kg2.

A wave has the wavelength equal to 396 nm. what must be the frequency of this wave

Elements heavier than hydrogen are formed when light elements undergo nuclear fusion. Fusion takes place within stars at temperatures nearing 108K. Explain why this high energy is required for fusion to occur.

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques.

A hot air ballon with a mass of 500kg ascends at a constant rate of 1.5 m/s for 20s. how much work is done by the upward force?

A construction team gives an estimate of three months to repave a large stretch of a very busy road. The government responds that it's too much inconvenience to have this busy road obstructed for three months, so the job must be completed in one

Determine the time needed for the load at b to attain a speed of 10 m/s, starting from rest.

A tea kettle is warmed on an electric stove. After a while, water vapor builds inside the kettle and causes a whistle in the lid to make a sound. How does this demonstrates the first law of thermodynamics?