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Q. Suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.40 s before coming to rest. How numerous revolutions did the centrifuge complete after being turned off?
Q. A 5.2kg block hangs from a spring with spring constant 2100 N/m. The block is pulled down 5.3cm from the equilibrium position and given an initial velocity of 1.60m/s back toward equilibrium. What is the frequency? What is the amplitude? What is the total mechanical energy of motion?
Coherent light with wavelength 590 mm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 m from the slits.
A dentist uses a small mirror of radius 55 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 20 mm from the tooth, what is the magnification of image.
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
An object weighs 302 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 220 N. When it is immersed in oil, it weighs 257 N. what is the density of the object.
A stream of water strikes a stationary turbine blade horizontally. The incident stream has a velocity of +16m/s whilst the exit has a velocity of -16m/s. mass of water per second that strikes the blade is 30kg/s.find the magnitude of average force ex..
A race car has a mass of 718 kg. It starts from rest and travels 45.0 m in 3.0 s. The car is uniformly accelerated throughout the entire time. What net force is exerted on it.
Avoid the weight of the bat, since it is so much less than the force of the bat. Select the direction of the incoming ball as positive direction.
A small immersion heater is rated at 350 W. Estimate how long it would take a heat a cup of soup (assume this is 250 mL of water) from 20C to 60C.
Illustrate a new gravitational potential energy
Compare these two ratings by determining the ratio of energy.
And if the plane could fly without this pilot, how much force would the plane require to maintain the equal acceleration?
After the engine is ignited, what is the rocket's speed when the spring has stretched 19.00 cm past its natural length? What would be the rockets speed after travelling the distance if it weren't tied down to spring.
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