Rearranging Equations Part A
Please show your work
1. Solve for n. PV=nRT.
2. The speed of sound in air changes when the air conditions change.
We can calculate the speed of sound (v). Solve this equation for v.
f=
3. Power is the amount of work done divided by the time in which it
was done. Solve for W.
(P = )
4. Momentum is the mass times the velocity(speed). Solve for v.
P = mv
Answers to part B
1. Multiply both sides by –p, and so q = - pM
2. a =
3. F = Ap
4. I =
Rearranging Equations B
Please show your work
1. The equation for lens magnification is shown below. p is the object
distance, q is the image distance. Usually we know p and M, so we
can find q. Solve this equation for q.
M=-
2. The equation for force is shown below. F = force, m = mass (in
kilograms), and a = acceleration (how fast something speeds up.) If
we know the mass of a baseball, and force the batter applies, we can
predict the acceleration of the baseball. Solve for a.
F = ma
3. For hydraulic equipment, P = pressure, F = force, and A = area.
Solve for F.
p=
4. The voltage = the current times the resistance. V = voltage, I =
current, R = resistance. If we know the voltage and resistance of a
circuit, we can predict the current that will flow. Solve for I.
V = IR
Answers to part A
1. Divide both sides by RT.
2. V = 2L f
3. W = Pt
4. v =
n=