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A 225 gram arrow is shot vertically into the air from an initial height of 1.40 meter above the ground with an initial speed of 18.6 m/s. When it reaches a height of 4.60 meter above the ground, its velocity is measured to be 9.74 m/s upward. Air resistance is not negligible. During the time interval between shooting the arrow and measuring its velocity at 4.60 m, find the amount of mechanical energy dissipated by air friction?
A toy car of mass 1.0 kg is stationary, and a child rolls a toy truck of mass 4.7 kg straight toward it with a speed of 3.2 m/s. What is the velocity of the center of mass of the system consisting of the two toys
A bar 5.0 m long has its center of gravity 1.5 m from the heavy end. What is the weight of the bar
A converging lens is located 10.0 cm to the left of a diverging lens. The focal length of the converging lens is +20.0 cm. where is the final image formed by the diverging lens
y of light in air enters a glasss surface. The angle ofrefraction in the glass is measured to be 45 degrees. what is the angle of incidence
At one point in the room, the sound intensity is 3.5 *10^-16W/m^2. If you move twice the distance away, find the sound intensity at the new distance
a system is devised to exert a constant force of 8 n on an 80-kg body of mass initially at rest. the force pushes the
An airplane flies 422 km in a straight line at an angle of 73.0 degrees south of east. Find the resultant displacement of the airplane for the entire trip
A camera with a telephoto lens of focal length 125 nm is used to take a photograph of a plant 1.8 m tall. The plant is 5.0 m from the lens. How tall is the image
a child rolls a 0.685kg basketball up a long ramp. the basketball can be considered a thin walled hollow sphere. find the maximum vertical height increase of the ball
Find the flux of Earth's magnetic field of magnitude 5.00 x 10-5 T through a square loop of area 10.0 cm2 when the field is perpendicular to the plane of the loop
an elevator mass 4900 is to be designed so that the maximum acceleration is 6.30times10-2.what is the maximum force
A laboratory technician drops a 0.0850-kg sample of unknown material, at a temperature of 100.0C, into a calorimeter. The calorimeter can, Compute the specific heat capacity of the sample
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