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Two sound sources radiating in phase at a frequency of 450 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find the sepa
A 0.125 kg baseball is dropped from rest. If the magnitude of the baseball's momentum is 0.790kg*m/s just before it lands on the ground, from what height was it dropped?
A basketball player who is 2.00 m tall is standing on the floor 10.0 m from the basket. If he shoots the ball at a 40.0 degree angle with the horizontal, at what initial speed must he throw so that
So that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the d
Determine the acceleration of each block and the tension in the string?
A diver releases an air bubble of volume 2.4 cm3 from a depth of 13 m below the surface of a lake, where the temperature is 7.0°C. What is the volume of the bubble when it reaches just below the
What is the apparent weight of a 75 kg astronaut 2500 km from the center of the earth's moon in a space vehicle accelerating toward the moon at 3.2 m/s^2
An impulse of 149 Ns is required to stop a person's head in a car collision. If the face is in contact with the steering wheel for 0.0152 s, what is the average force on the cheekbone? Answer in uni
One end of this rod is attached to the ceiling by a frictionless hinge, so the rod is free to swing back and forth. Pendulum B is a simple pendulum whose length is also d. Obtain the ratio TA/TB of
In terms of G, Me, m, and r, find the total mechanical energy Ea and Eb of the two satellites plus Earth's system before collision.
A 87 g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 76 cm. What is the speed of the arrow as it leaves the bow?
The acceleration of gravity is 9.81 m/s2 . Assuming that air resistance is simply a constant 95 N force on the person during the fall, determine the person's velocity just before hitting the net.
A rectangular block of ice 7 m on each side and 0.9 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. How high does the top of the ice block
(a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time.
Determine the number of 400-kg horses it can carry. This is a problem found in a conceptual physics book so no need to get to mathmatical.
Suppose you wanted to reach Alpha Centauri in 100 years. How many times faster is the speed you found in (a) than the speeds of our fastest current spacecraft (around 50,000 km/hr)?
An airplane can fly 470 miles with the wind in the same amount of time as it can fly 340 miles against the wind. If the wind speed is 26 mph, find the speed of the plane in still air.
If a 60 W light bulb at 120 V is left on in your house to prevent burglary, and the power company charges 10 cents per kilowatt-hour, how much will it cost to leave the bulb on for 30 days? Show you
A brick is thrown vertically upward with an initial speed of 4.80 m/s from the roof of a building. If the building is 74.0 m tall, how much time passes before the brick lands on the ground?
Lonnie pitches a baseball of mass .2 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the
By what length would these rails change between a cold day when the temperature is -10 degrees C and a hot day a 30 degrees C?
The mean distance between earth and the sun is 1.50 x 1011 m. The average intensity of solar radiation incident on the upper atmosphere of the earth is 1390 W/m2. Assuming the sun emits radiation un
the volume of inside of house is 240.16ft3. the air sh; 0.24btu/lbF and the density is 0.075lb/ft3. what rate should air be moving through the open window in order to keep the system in equilibrium?
find the components of the force exerted by the wall on the steel bar.
Find the speed of transverse waves on this string. If the tension in this string is increased by 1.0%, what will be the new fundamental frequency of the string?