Jenny is sitting on a sled on the side of a hill inclined at 15°. What force is required to keep the sled from sliding down the

hill if the combined weight of Jenny and the sled is 90 pounds?

If vx = 7.50 units and vy = - 6.10 units, determine (a) the magnitude and (b) direction of v⃗.

Perid 4 of the periodic table contains the elements potassium, calcium, and copper. Which is least reactive?

How do good and bad ozone forms

What can you assume has happened if an electron moves to a higher energy level? A) the atom has become more stable B) the electron has lost energy C) the electron has gain energy D) the atom has lost an electron

Describe the main reason why the scientific community did not accept Alfred wegener idea of continental drift?

How would be the number 54 be correctly produced in ASL

A thin rectangular piece of wood floats in water. You slowly pour oil with a density equal to that of the wood on the surface of the water until the height of the oil above the water is twice the height of the piece of wood.

A high speed train travels with an average speed of 227 km/hr. The train travels for 2hrs how far does the train travel

Why does a fluid become less dense when it is heated?

The period of a simple pendulum in a grandfather clock on another planet is 1.80 s. What is the acceleration due to gravity (in m/s2) on this planet if the length of the pendulum is 1.00?