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A cylinder contains 2.25 mol of helium gas at 21.0°C. Assume that the helium behaves like an ideal gas.
(a) Find the total internal energy of the system.
=?J
(b) What is the average kinetic energy per molecule?
(c) How much energy would have to be added to the system to double the rms speed? The molar mass of helium is 4.00 10-3 kg/mol.
A 200 cm rope under a tension of 80 N is set into oscillation. The mass density of the rope is 120 g/cm. What is the frequency of the first harmonic mode
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.57 m/s relative to the ground. How fast is the train moving
A small block of mass m1 = 0.5kg slides to the left, with a velocity of v1 = -8.40 m/s, towards a curved wedge of mass m2 = 3 kg which sits on an icy, frictionless lake surface.
You throw a bouncy ball directly down toward the ground. When it leaves your hand, 1 m above the ground, it is moving at 5 m/s. What is the ball's maximum height after it bounces
Monochromatic light falls on two very narrow slits 0.045 mm apart. Successive fringes on a screen 5.00 m away are 6.2 cm apart near the center of the pattern. estimate the frequency of the light
An object of mass b has a speed that changes with distance d according to v = bx^-n. What is the force as a function of d? What is the position as a function of time d(t=0)=d(initial).
A dog searching for a bone walks 3.00 m south, then 8.20 m at an angle 30.0° north of east, and finally 14.0 m west. Find out the dog's resultant displacement vector using graphical techniques.
A 5.61-mm-high firefly sits on the axis of, and 10.3 cm in front of, the thin lens A, whose focal length is 6.99 cm. Is this image upright or inverted with respect to the firefly
A 40.00-W eletric motor is able to accelerate a 8755 g car from rest to 30.00 mph in 31.10 seconds. Calculate the efficiency of the motor
500 mL of a liquid with a coefficient of volume expansion of 205x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 105x10-6/oC. how much of the liquid will overflow the container
A ray of light strikes a flat block of glass (n = 1.53) of thickness 1.80 cm at an angle of 36.0° with the normal. find the angles of incidence and refraction at each surface
He was supposed to travel due north for 5.6km, but he actuallytraveled 7.8km at 50 degrees north due east. (a) how far and (b) elucidate in what direction must he now travel to reach base camp?
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