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An archer fires an arrow, which produces a muffled "thwok" sound after it hits a target. If the archer hears the "thwok" exactly 1.2 s after firing the arrow and the average speed of the arrow was 48 m/s, what was the distance separating the archer and the target? Use 340 m/ s for the speed of sound
A point source of light is submerged 2.53 m below the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the area illuminated is a circle. What is the maximum radius that this circle could have?
At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m, How fast will the payload be traveling when it reaches the bottom of the shaft
A 0.65-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.4m on a frictionless horizontal surface. What is the maximum speed the ball can have
A transformer is made by winding a primary coil of 260 turns around an iron core. A secondary winding of 50 turns is made around the same core. What is the output voltage on the secondary
if the maximum height from which a person can jump without a parachute and still survive is 7.50 meters the maximum
A speedometer is graduated in 8 km/h increments and has accuracy rated to be within ±4%. Estimate the uncertainty in indicated speed at 90 km/h
A string that is fixed at both ends has a length of 2.28 m. When the string vibrates at a frequency of 85.7 Hz, a standing wave with five loops is formed. (a) What is the wavelength of the waves that travel on the string? (b) What is the fundamental ..
how high does it rise above the point of release. guess the speed of the car just before braking.
One lens of a near sighted man's eyeglasses has a focal length of-23.0 centimeter, and the lens is 2.1 centimeter from the eye. evaluate the focal length of the corresponding contact lens
a spring with a spring constant of 549 nm is used to propel a 0.275-kg mass up an inclined plane. the spring is
What is the height that the ball needs to be dropped from to make it completely around the loop on the track? (neglect air resistance and friction)
Your friend's car has broken down, and you volunteer to push it to the nearest repair shop, If the mass of your friend's car is 1050 kg, what is the normal force between the two bumpers
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