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On wet pavement, the coefficient of kinetic friction is 0.25. How fast should drive on wet pavement in order to stop in 50.78m?
a bullet is fired horizontally at a block of wood that is suspended by a string. the bullet strikes the block and is
An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is ? = 1.81 10-7 C/m2, and the plates are separated by a distance of 1.38 10-2 m. How fast is the electron moving just be..
A train moving with a speed of 31.7 m/s sounds a 140 Hz horn. Assume the stationary observer sounds a horn that is identical to the one on the train. What frequency is heard from this horn by a passenger in the train?
A very long wire generates a magnetic field of 9x 10-7 at a distance of 3 mm. What is the magnitude of the current
A 7.80×10?2 H inductor and 3.30×10?5 F capacitor are connected in series in a simple loop. What is the angular frequency of the circuit oscillations
A sailboat runs before the wind with a constant speed of 3.7 m/s in a direction 32 degrees north of west. How far north has the sailboat traveled in 21 min
A 200 lbs guy wants to slide down a plastic slide 24 ft long and on a 30 degree angle, after that the slide goes horizontally for 6 feet. Taking friction into consideration, how fast would he be going down the slide.
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
A 97.1-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.67 rad/s. Find the angular velocity of the platform with its load
A parallel-plate air capacitor of area A=16.0cm2 and plate separation d=3.40mm is charged by a battery to a voltage 52.0V. how much additional charge will flow from the battery onto the positive plate
A chocolate bar (40grams) has 210 Calories. Approximately how long would the 100 watt light bulb shine if we convert all the chocolate's energy into electricity (100% efficiently)? (Remember 1Cal = 1000 cal = 4200 joules)
A hollow, spherical shell with mass 1.90kg rolls without slipping down a slope angled at 40.0 degree. Part A Find the acceleration. Take the free fall acceleration to be g = 9.80m/s^2 Part B Find the friction force. Take the free fall acceleration to..
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