The thrust from a car is 590 n. the air resistance and friction together total 680 n. what happens to the speed of the car?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm

Hurry! how much heat is absorbed by a 72g iron skillet when its temperature rises from 11°c to 23°c?