If a small machine does 2500 joules of work on an object to move it a distance of 100 meters in 10 seconds, what is the force needed to do the work? What is the power of the machine doing the work?

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

La fuente de energia que se encuentra en la materia organica, de origen vegetal o animal y en los materiales obtenidos a partir de su transformacion recibe el nombre de: a. Biomasa b. Geotermica c. Mareomotriz d. Solar

When is a robot considered a cyborg.? A) when it replaces a human in a job B) when part of it is human C) when it is used in medical procedures D) when part of it malfunctions

The specific heat of copper is 0.093 cal/gC°, and the specific heat of aluminum is 0.22 cal/gC°. The same amount of energy applied to equal masses, say, 50.0 g of copper and aluminum, will result in a. a higher temperature for copper. b.

The way matter moves in a longitudinal wave

How much force is needed to stop a 80 kg football player if he decelerates at 5m/s?

A plastic rod rubbed with a duster attracts bits of paper becauseof a what force

A radioactive isotope of potassium has a half-life of 20 minutes if a 40 g sample of this isotope is allowed to decay for 80 minutes how many grams of the r adioactive isotope will remain

Which changes of state occur between solids and gases

The main difference between speed and velocity involves a. distance. b. weight. c. direction. d. gravity.