Which is true about forces? Check all correct answers. a. Forces are scalar quantities-they do not need direction.

b. Force is directly proportional to acceleration and mass. Objects with bigger mass and higher acceleration can produce bigger forces.

c. Forces are vectors- they always have magnitude and direction.

d. Objects at rest do not have any force acting on them.

e. Gravity only acts on objects that are falling.

f. Forces always require the Agent and the Receiver to touch to take effect.

g. Forces of equal magnitude but in opposite directions have a zero net force and so are in a balanced state- at rest or in motion.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80