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A gymnast whose mass is 50.0 kg swings back and forth on a 4.0m long rope. At the top of the swing she comes within 1.2m of the ceiling.
a) What is her velocity at the bottom of the swing? Use PE and KE (Potential and Kinetic Energy)
b) What is her velocity when she is 2.0m from the ceiling?
Analyze various philosophical approaches for ethical decision making, and the effectiveness and limits of each approach for making ethical choices and
A charge of -3.65 nC and a charge of -6.70 nC are divorced by a distance of 70.0 cm. Find the position at which a third charge of +7.30 nC can be placed so that the net electrostatic force on it is zero.
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 655 m/s. What is the horizontal distance between the end of the rifle and the bull's-eye
You and your friend Peter are putting new shingles on a roof pitched at 25?. If the coefficient of kinetic friction between the box and the roof is 0.51, with what speed should you push the box to have it gently come to rest right at the edge of th..
An object of length 3 cm is inside a plastic block with index of refraction 1.40. If the object is viewed through the top surface of block at a non-zero angle from the normal, where is an object relative to its image.
A tennis ball is hit with a vertical speed of 30 m/s and a horizontal speed of 25 m/s. How long will the ball remain in the air
If a mass m_a = 2m has intial velocity 4m/s and mass m_b = m is initially at rest, they undergo elastic collision. Calculate their final velocities after the collision
An object is 12.0 cm in front of a convex mirror. When the convex mirror is replaced with a flat mirror, What is the focal length of the convex mirror
A capacitor with air between its plates is charged to 70 V and then disconnected from the battery. When a piece of glass is placed between the plates, the voltage across the capacitor drops to 50 V. What is the dielectric constant of this glass?
One generator uses a magnetic field of 0.185 T and has a coil area per turn of 0.0405 m2, What magnetic field should be used in the second generator
An air conditioner connected to a 129 V rms ac line is equivalent to a 17 capital omega resistance, What is the impedence of the air conditioner
A copper kettle contains water at 23.4 °C. When the water is heated to 99.5 °C, Determine the volume of the kettle
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