A construction worker with a weight of 850 N stands on a roof that is sloped at 20. What is the magnitude of the normal force of the roof on the worker?

What characteristic of water makes it the universal solvent?

Imagine that you're observing a collision. Which action would allow you to determine whether the collision is inelastic? A. Measure the force of impact. B. Observe whether the colliding objects change their shape. C.

What is the impedance of the circuit? what is the reactance of a 4.00 micro f capacitor at a frequency of 80.0 hz?

A bat hits a moving baseball. If the bat delivers a net eastward impulse of 0.80 N-s and the ball starts with an initial horizontal velocity of 3.8 m/s to the west and leaves with a 5.

Alfred wegener was the one who made contiental drift theory?

Why does the closed top of a convertible bulge when the car is riding along a highway? Why does the closed top of a convertible bulge when the car is riding along a highway? The air pressure is greater outside the car than inside.

Is a white shirt cooler or warmer in the sunlight?

A stone is thrown vertically upward with a speed of 18.0. (a) How fast is it moving when it reaches a height of 11.0? (b) How long is required to reach this height? For part A) I did: y=11m, g=9.

What object or class of objects makes up most of the solar systemâs mass?

Carole is very tired and makes coffee. why would newton say that she must use her hand to put up the cup