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A cannon fires a cannon ball at 853.59 m/s in a straight line that passes directly over an observer's head. If the observer hears the sound of the cannon fire 2.45 seconds after he sees the cannon ball pass over his head, how far is the cannon from the observer? The temperature on this day is 8.99 oC.
Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.
A speedboat moving at 30 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of negative 3.5 m/s^2 by reducing the throttle. How long does it take boat to reach the buoy.
A 100 kg rocket moving radially outward from Earth has a speed of 4 km/s as its engine shuts off 200 km above Earth's surface.
The roof makes an angle of 23 degrees with the horizontal. If the edge of the roof is 10 meters high, clarify how far from the base of the house the basketball hits.
What is the magnitude of the passenger's acceleration.
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space.
George just graduated from college and is going on his first job interview. He has learned that there are two other candidates. Because of the information he has learned about the serial position effect, George asks to be either the first or the last..
A 68-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.11. What would be the magnitude of acceleration.
A playground merry-go-round has a radius of 4.60 {rm m} and a moment of inertia of 250 kg m^2 and turns with negligible friction about the vertical axle through its center.
the cube of insulating material has the one corner at the origen . each side of the cube has length 0.250m so the top face of the cube is parallel to the xz-plane and is at y=.250m, calculated the net charge enclosed by the cube
Suppose that the sound level of a conversation is initially at an angry 70 dB and then drops to a soothing 50 dB. Assuming that the frequency of the sound is 500 Hz, determine the (c) initial and (d) final sound wave amplitudes.
The three charged particles in the figure below are at the vertices of an isosceles triangle (where d = 1.60 cm). Taking q = 8.20 µC, calculate the electric potential at point A
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