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Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.9 × 10-4m2 and the speed of the water is 0.75 m/s as it leaves the faucet. Ignoring air resistance, find the cross-sectional area of the water stream at a point 0.09 m below the faucet.
A negative charge of -2.0 10-4 C and a positive charge of 9.5 10-4 C are separated by 0.24 m. What is the force between the two charges
A 370 kg rocket sled can be accelerated at a constant rate from rest to 1200 km/h in 2.0 s. What is the magnitude of the required net force
A cyclist has a speed of 5.0 m/s when she begins to coast down a hill, Calculate the work done by gravity on the cyclist
A 2.80 kg gold bar at 98 degrees celcius is dropped into 0.34 kg of water at 23 degree celcius. what is the final temperature? assume the specific heatof gold is 129 J/kg
Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion).
A standard 100 W (120 V) lightbulb contains a 7.70cm-long tungsten filament. What is the diameter of the filament
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 32 cans of soda which are warm at 87.7°F. how much ice needs to be added to your cooler
So I have a spring with a ball on it. I measure how many times it oscillates 10 times and I measure those 10 times at 11.6 seconds which means one time it takes is 1.16 seconds. How do I find the spring constant
A 75 kg bobsled is pushed along a horizontal surface by two athletes. After 4.5 m from rest, the bobsled has a speed of 6.0 m/s. How much force did the two athletes push with
A turntable is initially at rest. It starts rotating with a constant maximum angular acceleration for a period of 5 seconds. It then starts to slow down with an angular acceleration of -1 rad/s2 for another 5 seconds.
A 202 kg cart runs into the rear end of a 103 kg cart that is stationary. what is the speed of the cart before collision
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 505 nm, What is the intensity (in W/m^2) delivered to a rod
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