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a soccer player kicks a soccer ball initially at rest setting it in motion at a velocity of 30 m/s. if the ball has a mass of 0.50 kg and the time of contact is 0.025 s, what is the force exerted on the players foot?
A ball is thrown downward of a 50 meter high building with a speed of 10 m/s. In what height do the balls meet
A student on a piano stool rotates freely with an angular speed of 3.05 rev/s. Calculate the initial kinetic energy of the system
A "door closer" is attached to the door and the top of the door frame.When the door is open and at rest, the door closer exerts a torque of 4.8 {rm N} cdot {rm m}. What is the least force that you need to apply to the door to hold it open.
A uniform electrical field is established by connecting the plates of a parallel-plate capacitor to a 11V battery. The plates of the capacitor are separated a distance 3.50 cm. What is the capacitance of this parallel plate capacitor
Assume that a 7.0-cm-diameter, 50 W light bulb radiates all its energy as a single wavelength of visible light. Estimate the magnetic field strength at the surface of the bulb
Given that the diameter of the moon is 3,480 km, and using a meter stick or tape measure plus a 25¢ coin, estimate the distance, D, from the Earth to the Moon
A circuit contains six 210 lamps and a 14 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 12A fuse, will the fuse melt if all the lamps and the heater are on.
The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10-11 m, what is a fundamental difference between the two forces
A transformer takes 120V (RMS) from a household circuit and drops it to supply a secondary circuit at 8V (RMS) to power a dorbell at 3.75A (RMS). What is the peak current in the primary coil of the transformer
A concave spherical mirror has a radius of curvature of 7.00cm. Calculate the size of the image
question1if argentinosaurus a long-necked gigantic sauropod had a head height of 19 m and a heart height of 7.9 m what
A 1250 kg cannon, which fires a 80 kg shell with a speed of 546 m/s relative to the muzzle, is set at an elevation angle of 39° above the horizontal. At what angle with the ground is the shell projected
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