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A boat heads directly across a river 40 meter wide at 8.0 m/s. The current is flowing at 3.8 m/s. Determine how far downstream is the boat when it reaches the other side?
Find out the magnitude of that push.
a a sidewalk is to be constructed around a swimming pool that measures 10.0 plusmn 0.1 m by 17.0 plusmn 0.1 m. if the
what is the difference between the energy stored in a spring that is stretched 0.40 m and the energy stored in the same spring when it is stretched 0.20 m?
Estimate how many molecules of air are in each 1.8 L breath you take that were also in the last breath Einstein took (assumed to be the same volume). (Hint: Assume the atmosphere is about 12 km high and of constant density. Take the temperature of th..
A paperweight, when weighed in air, has a weight of W = 14.2 N. When completely immersed in water, however, it has a weight of Win water = 10.5 N. Find the volume of the paperweight.
Estimate the average force exerted by a shot-putter on a 7.4 kg shot if the shot is moved through a distance of 2.5m and is released with a speed of 11m/s
An average froghopper insect has a mass of 12.3 mg and reaches a maximum height of 290 mm when its takeoff angle is 58 degrees above the horizontal. Find the takeoff speed of the froghoppper
light falls on a pair of slits 0.00198 cm apart. the slits are 84.2 cm from the screen. the first-order bright line is
Lightning can be studied with a Van de Graaff generator, which consists of a spherical dome on which charge is continuously deposited by a moving belt, What is the maximum potential of the dome
A charge of q = +7.22 ?C is located in an electric field. The x and y components of the electric field at this point are Ex = 6.48E+3 N/C, What is the magnitude of the force on the charge
An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sees the car, the locomotive is 130 m from the crossing and its speed is 17 m/s.
A block with mass m =7.5 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.25 m. what is the magnitude of the net force on the block
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