If an object has a mass of 81 kg, what is its approximate weight on earth?

A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no appreciable air drag.

What type of waves is caused by a gravitational attraction of the sun and moon?

This glass of lemonade is sitting in the hot summer sun. As time passes, in which direction will heat transfer take place?

Fluid originally flows through a tube at a rate of 100 cm³/s. To illustrate the sensitivity of flow rate to various factors, calculate the new flow rate for the following changes with all other factors remaining the same as in the original

How would you sketch the path of boat of a speed of 3 m/s?

2 A scientific theory is

Explain the roles of Earth's own energy sources and solar energy in the rock cycle

In order to merge into highway traffic, a car accelerates along a 100.0 m on ramp from rest to 25.0 m/s. How much time does this take?

Muscle control is the ability to quickly change directions and make complex movements

According to the first law of thermodynamics, what could happen when heat is added to a system? The internal energy of the system decreases. The heat is turned into work done by the system. New energy is created within the system.