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A football player punts the ball at a 45.0º angle. Without an effect from the wind, the ball would travel 60.0 m horizontally. What is the initial speed of the ball?
Calculate the density of a bar of gold with a length
A small block is attached to an ideal spring and is moving in SHM on a horizontal, frictionless surface. When the amplitude of the motion is 0.090m , it takes the block 2.90s to travel from x= 0.090m tox= -0.090m.
A ball is thrown vertically upward by an initial speed of 11 m/s. One second later, a stone is thrown vertically upward with an initial speed of 25 m/s. Discover the time it takes the stone to catch up with the ball.
A 75kg skier rides a 2830m long lift to the top of amountain. The lift makes an angle of 14.6 degrees with thehorizontal. What is the change in the skiers gravitational potential energy
Discover the electric energy density among the plates of a 225-F parallel-plate capacitor. The potential difference among the plates is 310V, and the plate separation is 0.265mm .
A spring has a spring constant, k, of 440 N/m. How much must this spring be stretched to store 25 J of potential energy
A high-speed flywheel in a motor is spinning at 450 rpm when a power failure suddenly occurs. The flywheel has mass 40.0 kg and diameter 72.0 cm. How many revolutions would the wheel have made during this time
An aircraft performs a maneuver called an aileron roll. During this maneuver, the plane turns like a screw as it maintains a straight flight path, which is the acceleration of the wing tip
A 52.0 kilogram ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 1.50 turns every second. Determine what horizontal force must her wrist exert on her hand
The dipole moment of CH4 is zero, yet CH3D has a finite dipole moment. Describe why CH3D has a dipole moment. (Hint: Consider a simple qualitative model for potentials bonding H's and D's to C. Use your knowledge of the harmonic oscillator. Note that..
A 0.14 meter string clamped at both ends under a tension of 16 N has a fundamental frequency of 135 Hz. What is the mass density of the string
Your company makes anemometers and plans to install light bulbs on them for high wind warnings. calculate the number of turns in the coil wire needed to light the bulb
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