In which activity is no work done?

A. lifting a book

B. holding a brick

C. climbing stairs

D. pushing a shopping cart

An isotope has a half life of 2 days. After 6 days, how much of the original material is left? A. 12% B. 12.5% C. 30.2%

Electrical shock is more likely to be fatal when the path of current is through the

A piece of metal has attained a velocity of 107.8 m/sec after fallinf for 10 seconds what is its initial velocity

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)

Water has a density that is 13.6 times less than that of mercury. how high would a column of water need to be to measure a pressure of 1 atm?

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a

What is Nothing. (sorry i have been wondering this for a very long time)