A boy pedals his bicycle with a net horizontal force of 235 N. If the total mass of the boy and the bike is 40 kg, how much are they accelerating

When neutral charge comes into contact with a positive charge

In the Earth's mantle, heat is transferred in large convection currents. Within these currents,

Which of the following statements describes how a heat pump works? 1. The heat pump decompresses gas to warm and cool air. 2. The heat pump compresses gas to warm air and decompresses gas to cool air. 3.

Why is external fertilization not possible in organisms that live on land

A uniform disk of radius 0.2 m and mass m = 16 kg is mounted on a nearly frictionless axle. A string is wrapped tightly around the disk and pulled with a constant force of F = 1 N. After a while the disk has reached an angular speed of!0 = 1.2 rad/s.

Suppose if you whirl a yo-yo about your head in a horizontal circle. in what direction must a force act on the yoyo? What exerts the force?

Solutions with a low pH have which of these properties? - have an - OH value -feels slippery -tastes sour -turns litmus paper blue

Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel? A. A compound B. An element C. A molecule D. An alloy

Consider two small masses of air, both at a pressure of 1000 mb. One mass is on the beach in Costa Rica (lucky air mass) and the other is on a glacier in Greenland (Sad!). Which mass has the higher density?

Metric Unit for Weight (Not grams)