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A car is making a trip of 40 miles. It travels half the distance at an average speed of 20 mph. In order for it to have an average speed of 40 mph for the whole trip, the car would require to:
1. Cover the remainder of the distance in 15 minutes
2. Travel at an average speed of 60 mph for the remainder of the trip.
3. Travel at an average speed of 40 mph for the remainder of the trip.
The concrete wall of a building is 0.14 m thick. Thetemperature inside the building is 22°C, while the temperatureoutside is 0.0°C. What is the emissivity of the wall
A simple harmonic oscillator consists of a block of mass 1.83 kg attached to a spring of spring constant 100 N/m. What was the velocity of the block at t = 0 s
A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall 2.6 Joule of work is required to compress the spring by 0.1 meter. Determine the value of the mass
A 30.0g ball rolls around the 40.0cm diameter hemishperical track at 60.0rpm. Assume rolling friction is negligible. Determine the ball's linear velocity
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 660N on the earth, what would be your weight on the surface of a neutron star that has the same mass as ..
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
A magnetic field is oriented at an angle 42 degrees to the normal of a rectangular aread 5.5 cm by 6.8 cm. evaluate the strength of the magnetic field
A motorcycle has a constant speed of 24.0 m/s as it passes over the top of a hill whose radius of curvature is 131 m. The mass of the motorcycle and driver is 348 kg.
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
a ball is thrown straight down from the top of a cliff with a speed of 5 ms. the cliff-top is 20 m above ground level.
a lead ball is dropped into a lake from a diving board 18 ft. above the water. it hits the water with a certain
question1when the door of the chapel of the mausoleum in hamilton scotland is slammed shut the last echo heard by
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