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A bullet of mass 7.00 g is fired horizontally into a wooden block of mass 1.15 kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.250. The bullet remains embedded in the block, which is observed to slide a distance 0.270 m along the surface before stopping.
What was the initial speed of the bullet?
A diving bell with interior air pressure equal to atmospheric pressure is submerged in Lake Michigan at a depth of 180.5 m. find the magnitude of the net force on the viewing port
On a drive from your home to town, you wish to average 56 mph. The distance from your home to town is 76 miles. What average speed must you maintain in the remaining distance
A projectile is red from level ground at an angle of 30 degree above the horizon. It hits the ground at t = 4 s. What is the magnitude of the initial velocity, v?
Cell phone sends 1.25ghz magnetic waves. Field vector of the wave has a strength of 24 mv/m and points upward, Which direction does magnetic vector point
a 7.60 cm length of straight wire runs horizontally along a north-south line. the wire carries a 3.25a current flowing
Zartan of the jungle crosses a river by grabbing an 8 m long vine, conveniently hanging from a strong branch, and swinging over the water. find his acceleration and the tension in the vine
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 8.77 m, what is the magnitude of the astronaut's linear speed
A real battery is not just an emf. We can model a real 1.5v battery as a 1.5v emf in series with a resistor known as the "internal resistance", What is the potential difference between the terminals of the battery
A 400-W immersion heater is placed in a pot containing 2.0 litters of water at 20 C.(a) how long will it take to bring the water to boiling temperature assuming that 80% of the available energy is absorbed by the water?(b) how much longer will it tak..
The mass of hot-air balloon and its occupants is 320 kg (excluding the hot air inside the balloon). To what temperature (in K) must the air be heated so that the balloon just lift off? The molecular mass of the air is 29 u
A device uses a Stirling cycle on 391 moles of a monatomic ideal gas between two reservoirs with temperatures of 395 K, How much energy does this device remove from the cold reservoir
A 1.5 kg mass is held at rest on top of a frictionless and horizontal table. A light string loops over a pulley which is in the shape of a 10 cm radius solid disk which has a mass of 1.5 kg. What is the acceleration of the falling mass
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