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You are driving a car which is heading 20 m/s towards a brick wall. You sound a horn which emits at a frequency of 400 Hz when at rest.
A) If the horn acts like an organ pipe which is open on each end, what is the length of the organ pipe in cm?
B) What is the beat frequency that you hear?
One member of a pair of parallel conducting plates has potential 17 V. An electron is ejected from that plate at potential, What is the potential of the second plate
A 1380-kg racecar is driving around a circular track of radius 157 m, What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
The hydrogen bomb detonated in 1954 had an explosive power equal to about 15 megatons of TNT, How many times more explosive was the hydrogen bomb
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. The tension in the wires is the equal, and they have the same mass.
A 34.4-kg crate rests on a horizontal floor, and a 71.8-kg person is standing on the crate. Determine the magnitude of the normal force that the floor exerts on the crate
What are the corresponding velocity vectors
The length of a moving spaceship is 25.6 m according to an astronaut on the spaceship. what is the speed of the spaceship
A rock is thrown vertically upward with a speed of 14.0 . Exactly 1.00 later, a ball is thrown up vertically along the same path with a speed of 21.0
A 2.0 mL syringe has an inner diameter of 4.0 mm, the needle inner diameter of 0.21 mm, and a plunger pad diameter (where you place your finger) of 1.20 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. S..
Suppose a car is traveling at 14 m/s, and the driver sees a traffic light turn red. After 0.50 s has elapsed (the reaction time) the driver applies the brakes and the car decelerates at 8.0 m/s2.
A certain musical instrument is a tube with one end open and the other end closed. The second-lowest frequency that it can play is 1500 Hz. What is the fundamental frequency
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