Chase is riding a roller coaster called The Shock Wave. He experiences a downward acceleration of 12.5 m/s2 at the start of a downhill. Use Newton's
second law to determine the force acting upon Chase's 50-kg body at the
start of the hill. *
0.25 Newtons
2.5 Newtons
4 Newtons
62.5 Newtons
625 Newtons
4,000 Newtons
62,500 Newtons

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is