Calculate the work done in lifting a 500-N

barbell 2.2 m above the floor. What is the

potential energy of the barbell when it is

lifted to this height?

be bor

The sound level produced by one singer is 70.8 dB. What would be the sound level produced by a chorus of 37 such singers (all singing at the same intensity at approximately the same distance as the original singer)

Em um recipiente foram colocados 800ml de álcool, cujo coeficiente de dilatação volumétrica é 1,8.10

What is a broad question you can answer by doing this experiment?

Which of the following terms best describes energy from the Sun? A.) microwaves B.) visible light C.) infrared radiation D.) electromagnetic radiation

Which of the following is an inference? A) the flower is pink. B) vinegar has a pungent aroma. C) a dog barks. D) a cup with steam coming out of it will be hot to the touch.

Suppose a body has a mass of 60 kilograms and a velocity of 2 meters per second upward. What is the linear momentum?

Reflection and abssorption prevent some

Why is it important to change only one experimental variable at a time in an experiment?

A 0.0663 kg ingot of metal is heated to 241◦C and then is dropped into a beaker containing 0.395 kg of water initially at 25◦C. If the final equilibrium state of the mixed system is 27.4 ◦C, find the specific heat of the metal.

What does it mean when we say an atom has decayed?