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According to the kinetic theory of gases, the pressure of a gas is due to:
Air enters a hot-air furnace at 7°C and leaves at 77°C. If the pressure does not change each entering cubic meter of air expands to:
Looking directly downward from a boat, you see a shark that appears to be 4.5 m below the water's surface. What's the shark's actual depth?
Question: If a particle of mass 5.4 kg is moving east at 10 m/s and a particle of mass 19 kg is moving west at 10 m/s, what is the velocity of the center of mass of the pair? answer in m/s west.
Immediately after the release, particle 1 has an acceleration A1 whose magnitude is 4.90 103 m/s2, while particle 2 has an acceleration A2 whose magnitude is 8.00 103 m/s2. Particle 1 has a mass of
Assuming you are 10m away from each other, what is the magnitude of the electric force between the two of you? Is the direction of the force towards or away from your neighbor? and how can you tell?
a) calculate the new angular speed of the disc b) if the lump gets unstuck and rolls of the disc.what will now be the angular speed of the disc ?
To appreciate the strength of gravity, calculate the number of steel cables that would be required in the absence of gravity to hold the moon in orbit about the earth. Each cable has a cross section
Heat is: A) energy transferred by virtue of a temperature difference B) energy transferred by macroscopic work C) energy content of an object D) a temperature difference E) a property objects have
To study in detail the surface of the moon, it is planned to put a geo-synchronous satellite in orbit about the moon. calculate the distance from the moons center that the satellite should be at so
What is the rate of energy loss in watts per square meter through a glass window 1.6 mm thick if the outside temperature is -8.3°F and the inside temperature is +84°F?
A 2.00-kg object moves with constant velocity 3.00 m/s toward the east. Two forces act on the object. The first is a 40.0 N force toward the west. What is the second force that acts on the object?
A ball is thrown at a 60.0° angle above the horizontal across level ground. It is released from a height of 2.00 m above the ground with a speed of 16.0 m/s. How long does the ball remain in the
A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 480 m. How fast can she swim in still water?
The plane flies with an air speed of 120 m/s. If a constant wind blows at 10.0 m/s due west during the flight, what direction must the plane fly relative to the air to arrive at the destination?
A plane is headed eastward at a speed of 156 m/s. A 20.0 m/s wind is blowing southward at the same time as the plane is flying. The velocity of the plane relative to the ground is ?
A swimmer heading directly across a river 200 m wide reaches the opposite bank in 6 min 40 s. She is swept downstream 480 m. What is the speed of the current?
Consider a two-loop standing wave on a string. If we increase the tension without changing the frequency, what kind of standing wave can we obtain?
Moving a charge from point A, where the potential is 380V, to point B, where the potential is 190 V, takes 4.1×10-4 J of work. What is the value of the charge?
what are the mass and speed (in the initial particle rest frame) of the second particle?
At relatively high temperatures nitrogen and oxygen more readily form a compound according to: N2(g) + O2 <-> 2NO(g). Calculate kp given that the initial pressures of nitrogen are 95 atm and 8
A 40.2 L constant-volume cylinder containing 2.21 mol He is heated until the pressure reaches 4.20 atm. What is the final temperature?
One hundred stones are placed on the ground 3 ft. apart, the first being 3 feet from a basket. If the basket and all of the stones are in a straight line, how far does a person travel who starts fro
A blue ball is thrown upward with an initial speed of 21.2 m/s, from a height of 0.5 meters above the ground. 2.6 seconds after the blue ball is thrown, a red ball is thrown down with an initial spe
Suppose a ball thrown downward with initial velocity 3 m/s instead of being dropped a) what then would be its position after 1s and 2s ?