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You notice you are running low on gas in your 1200kg car, and you are hoping you have enough gas to reach the bottom of the hill. You decide to harness your graitational potential energy combined with your initial kinetic energy at the top of the hill to help you get to the bottom of the hill without over working your engine, so you take your foot off of the gas pedal to coast down the hill. If your initial speed is 10 m/s, the elevation of the hill is 50 m and the work done by friction of the tires on the road is 150,000 J, what will your speed be at the bottom of the hill? Use conservation of energy.
A 20,000 ohm resistor and a capacitor are connected in series and then a 15v potential differnce is suddenly applied across them. what is the capacitive value of the capacitor
Investigators are researching the appearance of a strange movement of objects in what the local community considers a haunted house. how strong was the magnetic field that produced this EMF
During the late 19th and early 20th centuries, direct observations showed that a glacier in Switzerland flowed forward in the downhill direction while its snout (terminus) was retreating higher up the valley? Which of the following describes these..
A 3.6- cm-radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 255 rad/s2, How long is the plane
A 50-m length of wire is stretched horizontally between two vertical posts, Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 67.0° with respect to the wire
A speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. What is the speed at which the belt of the ramp is moving
Water is in the big beaker. Scale 1 reads 87 newtons, scale 2 reads 948 newtons, and scale 3 reads 0 newtons. The hanging block has a density of 10 × 10^3 kg/m3. To the nearest tenth of newton what does scale 1 read after the block is fully lowere..
A student is trying to decide what to wear. His bedroom is at 17.0°C. His skin temperature is 36.0°C, Find the net energy loss from his body by radiation in 10.7 min
A point charge q1 = 15.00 microC is held fixed in space. From a horizontal distance of 8.0cm, a small sphere with mass 4.00*10^-3 kg, What is the acceleration of the sphere at the instant
A kite is hovering over the ground at the end of a straight 44-m line. The tension in the line has a magnitude of 15 N. Find the height of the kite
A free floating piston cylinder device that contains 1 kg of a 25% quality saturated mixture of water at 150C, Determine the initial and final pressure, the total energy of electrical work added to the water
A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 87.5 dB. What is the combined sound level
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