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A large piano that weighs 4100 N is to be moved into a house by way of an opening that is 1.5 m from the ground. If the movers use an 18 m plank as an incline and a force of 600 N, what is the ideal mechanical advantage?
An 8.0 magnitude seismic wave is traveling to a city which is 100 kilometer away. Find how much time do the city residents have before it hits them
q1. a positive charge of q 3.5 microc is pulled on by two negative charges. one -2.0 microc is 0.050 m to the north
At our distance from the Sun, the intensity of solar radiation is 1370 W/m2. The temperature of the Earth is affected by the greenhouse effect of the atmosphere.
The earth orbits the sun in a nearly circular orbit of radius 1.49 x 1011 m. What is the acceleration of the earth
A boy of mass 48.7 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 11.1 m/s. discover the final velocity of the skateboard.
The pressure drop in the center of a tornado (i.e., relative to outside of the tornado) can be modeled by the following equation: delta p = rho^aU^b, Estimate the pressure drop in the center of the tornado
Two small balls with charges q1 = 6.3 microC and q = -17.5 miroC are separated by a distance d = 5.0 cm. Calculate the electric flux passing through the following three surface.
A high-voltage transmission line with a resistance of 0.28 omegacap.gif/km carries a current of 1040 A. What fraction of the transmitted power does this loss represent
A particle having charge q = +2.10 µC and mass m = 0.010 0 kg is connected to a string that is L = 2.00 m long and tied to the pivot point P, Determine the speed of the particle
Batteries consist of an ideal source of potential dissimilarity in series with a small resistance. The electrical energy of the battery is produced with chemical reactions that occur in the battery. But, these reactions also result in a small resista..
a tennis ball of mass o.022 kg is moving at 3.1 m/s at anangle of 222 degrees to the horizontal. it is struck by a tennisracket which exerts a force on it of 73t - 442t 2 N. find the final velocity of the tennis ball
The initial speed of a 2.8-kg box traveling up a plane inclined 37 degree to the horizontal is 3.96 m/s. The coefficient of kinetic friction among the box and the plane is 0.30. How far along the incline does the box travel before coming to a stop?
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