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A man can row a boat at a speed of 7.45 km/h in still water. If he is crossing a river where the current is 2.00 km/h, in what direction should his boat be headed if he wants to reach a point directly opposite his starting point?
What is the friction force that acts on the firefighter?
A yo-yo has a rotational inertia of 1140 g·cm2 and a mass of 81.3 g. Its axle radius is 3.27 mm, and its string is 106 cm long, translational kinetic energy, rotational kinetic energy
A 60.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.760 and 0.410, correspondingly. What horizontal pushing force is required to (i) just start the crate moving and (ii) slide the crate ..
Assume the wheel has a constant negative angular acceleration of magnitude 2.50 rad/s2. Explain through how many radians has the wheel turned during the interval found in (a) which is 4.98?
A particle of ionizing radiation creates 4900 ion pairs in the gas inside a Geiger tube as it passes through. What minimum energy was deposited
The average output power of a cellular phone, which can be treated as a point of E-M waves, is 1.0W when it is "ON". Estimate the intensity of the phone's E-M waves in your brain
Two blocks of mass 2kg and 4 kg are held together by a string force of 10N is applied on 2kg and 20N on 4kg find the tension in the string connected between two blocks
A certain part of an aircraft engine has a volume of 2.6 ft3. Determine how much weight is saved by using aluminum instead of nickel
How far ahead of the film should the lens be if the object to be photographed is 13 m away.
A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. What is the force exerted by the muscle if its effective perpendicular lever arm is 2.10 cm
A moon orbits a planet of unknown mass with a period of 1.8 days. If the radius of the moon's orbit is 420,000,000 meters, Determine the centripetal acceleration of the moon
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. how much thermal energy is created
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