When in orbit, astronauts experience weightlessness what is this caused by?

18 Newton's lifted 5 meters? How much is in joules?

A beam of 1.0 MHz ultrasound begins with an intensity of 1000 W/m². After traveling 12 cm through tissue with no significant reflection, the intensity is about A. 750 W/m² B. 500 W/m² C. 250 W/m² D. 125 W/m²

a horizontal force of 100N is required to push a crate across a factory floor at a constant speed. What is the net force acting on the crate / What is the force of friction acting on the crate?

List at least three factors that would cause an organism to migrate one habitat to another

Select the correct answer. A mixer-grinder has an efficiency of 65 percent. If the output work is 50 joules, what is the amount of input work required?

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?