Kerry is explaining to a friend that she will be conducting a descriptive investigation. she wants to know if increasing the size of a parachute affects a skydiver’s time in the air. she plans on having skydivers drop from the same height but with different chute sizes and comparing the data. what is unusual about the description of her scientific investigation? a. descriptive investigations cannot have procedures.
b. this is not a descriptive investigation.
c. this is not a proper scientific question.
d. descriptive investigations cannot have a question.
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The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.