What is the efficiency of her body when a cyclist expends 1000 w of power to deliver mechanical energy to the bicycle at the rate of 100w?

How long does it take for the speed of light and sound to travel around the world

A 92.0-kg skydiver falls straight downward with an open parachute through a vertical height of 325 m. The skydiver's velocity remains constant.

An object with a mass of 8.9kg has a force of 92.0 Newtons applied to it. What is the resulting acceleration of the object? Enter Answer Here

The Standard Kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is the density of the material? density=m/v mass=1kg and volume being volume of a cylinder.

Which of the following statements are true. A. Conductors consist of metals, like silver, copper, iron. Insulators consist of nonmetals like wood, plastic, wool. B. Conductors consist of nonmetals like wool, wood, plastic.

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.