1.The dimensions or units for the quantity (Pressure * Volume) is the same as the dimensions or units of

a.force

b.energy

c.energy/temperature

d.force/temperature

2.According to the ideal gas law, PV = constant for a given temperature and amount of gas. As a result, an increase in volume corresponds to a decrease in pressure. According to the kinetic theory, this happens because the molecules

a.Collide with each other more frequently

b.Move slower on the average.

c.Strike the container wall less often.

d.Transfer less energy to the walls of the container each time they strike it.

3.An air bubble ascends from the bottom of a lake 15 m deep. The temperature at the bottom of the lake is 4oC, and near the surface it is 20oC.

Calculate the speed (in m/s) of an electron and a proton with a kinetic energy of 1.70 electron volt (eV). (The electron and proton masses are me = 9.11 ✕ 10−31 kg and mp = 1.67 ✕ 10−27 kg. Boltzmann's constant is kB = 1.38 ✕ 10−23 J/K.)

(a) an electron m/s

(b) a proton m/s

(c) Calculate the average translational kinetic energy in eV of a 3.15 ✕ 102 K ideal gas particle. (Recall from Topic 10 that 1 2 mv2 = 3 2 kBT.)

___eV

a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A when it is connected to a voltage. At what voltage is it operating? (Express your answer to two significant figures.)

b) A piece of copper wire is 1.00 m long and has a diameter of 2.00 mm. Copper has a resistivity of 1.725⋅10−8Ω1.725⋅10−8Ω

Calculate the resistance of this piece of copper wire. (Express your answer to three significant figures.)

The launching mechanism of a popgun consists of a trigger-released
spring. The spring is compressed to a position yA=-0.12m, and the trigger is fired.
The projectile of mass m=35g rises to a position yC=20m above the position yB=0m
at which it leaves the spring.
1-Neglecting all resistive forces, determine the spring constant.
2-Find the speed of the ball at height yB

After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 50.0 m horizontally from the end of the ramp. His velocity, just before landing, is 24.0 m/s and points in a direction 34.1 ° below the horizontal. Neglecting air resistance and any lift that he experiences while airborne, find (a) the magnitude and (b) the direction of his initial velocity when he left the end of the ramp.

A map suggests that Atlanta is 730 miles in a direction 5.00° north of east from Dallas. The same map shows that Chicago is 560 miles in a direction 21.0° west of north from Atlanta. The figure below shows the location of these three cities. Modeling the Earth as flat, use this information to find the displacement from Dallas to Chicago.

A small bouncy ball is dropped from the flat roof of an abandoned, and as-yet unrepurposed industrial building. The ball is observed to take 1/8 of a second to fall across a broken window with the total height of 1.2m. After the ball hits the ground, it bounces back upward and again traverses the window’s height in 1/8s of a second on its way toward the top of the roof. We thus assume that the ball loses no energy upon impact with the ground. If the time that the ball spends below the bottom of the window is 2s, answer the following questions.

a) What is the velocity of the ball at the top and bottom of the window, respectively, when the ball is on its way down?

(b) What is the time it takes the ball to fall from the top of the building to the top of the window?

(c) What is the height of the building?

A pilot flies her route in two straight-line segments. The displacement vector A for the first segment has a magnitude of 235 km and a direction 30.0^o north of east. The displacement vector B for the second segment has a magnitude of 173 km and a direction due west. The resultant displacement vector is R = A + B and makes an angle θ with the direction due east. Using the component method, find (a) the magnitude of R and (b) the directional angle θ.

Three equal point charges, each with charge 1.30μC , are placed at the vertices of an equilateral triangle whose sides are of length 0.300m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)

A 45.0-kg girl is standing on a 159-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.58 m/s to the right relative to the plank. (Let the direction the girl is moving in be positive. Indicate the direction with the sign of your answer.)

(a) What is her velocity relative to the surface of ice?
m/s

(b) What is the velocity of the plank relative to the surface of ice?
m/s

A spider hangs from a strand of silk whose radius is 4.0 X 10 E-6 m. The density of the silk is 1300 kg/m3(cube). When the spider moves, waves travel along the strand of silk at a speed of 280 m/s. Ignore the mass of the silk strand, and determine the mass of the spider.

Please Help!!!!!!!!!!

A steel ball with a mass of 0.600 kg is dropped from an initial height of 2.80 m onto a metal plate. The steel ball bounces multiple times and on each bounce it returns to 75% of its previous maximum height.

A)What is the initial mechanical energy of the ball-Earth system, just after the ball is released from its initial height? Use the surface of the steel plate as the y = 0 reference point for the gravitational potential energy.

B)How much mechanical energy does the system lose during its first bounce?

What are differences (in use, benefits, requirements etc) in the 160 volts that the USA uses and 220-240 volts the rest of the world uses? Explain how a step-down converter/transformer to reduce the voltage input and outputs the correct voltage works when using a device of 240 volts to the USA 160v, vice versa?

A coin is dropped from a hot-air balloon that is 287.3m above the ground and rising at 10.0m/s upward. For the coin, find: a) the maximum height reached,b) its position 4.34s after being released,c) and the time before it hits the ground.