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Question: A boat takes 3.20 hours to travel 30.0 km down a river, then 6.80hours to return.
Question 1: How fast is the river flowing?
I will only give best answer if all the steps are shown and correct. Thank you!
A 10cm long thin glass rod is uniformly charged to +50nC. A small plastic bead, charged to -5.3nC,is 4.4cm from the center of the rod
A hoop rolls without slipping down a ramp that is inclined at 35 degrees above the horizontal. Calculate the length of the ramp
a helium nucleus charge 2e moves through a potential difference v -0.60 kv. its initial kinetic energy is 2.90x10-16
what is the volume v of a sample of 4.30 mol of copper? the atomic mass of copper cu is 63.5 gmol and the density of
A 0.88 kg mass attached to a vertical spring of force constant 196 N/m oscillates with a maximum speed of 0.40 m/s. Find the following quantities related to the motion of the mass.
a cloud mass moving across the ocean at an altitude of 2000 m encounters a coastal mountain range. as it rises to a
When a 0.31-kg mass is attached to a vertical spring, the spring stretches by 15 cm. How much mass (total) must be attached to the spring to result in a 0.53-s period of oscillation
Suppose he hits the ball with a speed of 29 m/s at an angle of 26° above the horizontal. Explain how long was the ball in flight? How far did it travel?
A radioactive isotope has a half-life of 76.0 min. A sample is prepared that has an initial activity of 16.0E10 Bq. How many radioactive nuclei are initially present in the sample
An electric motor rotating a workshop grinding wheel at a rate of114 rev/min is switched off. Suppose the wheel has a constant negative angular acceleration of magnitude1.90 rad/s2. How long does it take for the grinding wheel to stop?
a baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 36.29 ms in the x direction. the
An electron is accelerated by a constant electric field of magnitude 325 N/C. Find the acceleration of the electron
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