An upward force of 27.5 n is applied to a string to lift a ball with a mass of 2.5 kg.

a. what is the net force acting upon the ball

What car companies are making electric cars

A 0.200 kg block of a substance requires 3.59 kJ of heat to raise its temperature by 20.0 K. What is the specific heat of the substance? A. 2,020 J / (kg * K) B. 383 J / (kg*K) C. 130 J / (kg * K) D. 897 J / (kg*K)

The cognitive aspect of cognitive-behavioral therapy is mainly concerned with a person's: A. group interactions. B. biochemistry. C. early childhood. D. thoughts.

What is the velocity of a bicycle in meters per second if it travels 1 kilometer west in 4.1 minutes

Why has no work being done if there is no displacement? Use the equation W=Fx D to explain your answer

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons

Gamma radiation can be significantly reduced by ... A sheet of paper Air A 3 mm thickness of aluminium Several cm of lead