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A car travels up a hill at a constant speed of 31 km/h and returns down the hill at a constant speed of 47 km/h. Calculate the average speed for the round trip.
Refrigerant-22 enters a turbine at 300 psi, 280°F, 2000 ft3/hr. The exit is at 15 psi, 10°F. Find the mass flow rate
An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other losses account for 60.0 percent of the energy usage, what altitude change can a rider achieve when driving in hilly terrain, if the rider and scoote..
An unstretched elastic spring has a mass M = 3.75 kg and a length of l0 = 0.525 m. What is the elastic potential energy of the spring
A 51.5 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.110 m/s. How much work must be done to stop it
Water is flowing through a pipe (area 4.2 cm2) that connects to a faucet adjusted to have an opening of 0.48 cm2. what is its speed as it leaves the faucet
if the fundmental source of a sound wave is a vibrating object, what is the fundamental source of an electomagnetic wave
Forensic scientists can measure the muzzle velocity of a gun by firing a bullet horizontally into a large hanging block that absorbs the bullet and swings upward. What was the original speed of this bullet
A charged particle is injected at 215 m/s into a 0.0739-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
The expression found in part (d) is a cubic equation. There are standard algebraic solutions to this type of equation, but it is sometime quicker and easier to use other methods. explain a way to get a reasonably accurate estimate of v (say, to th..
If the wire is heated to 36.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire
a damped harmonic oscillator involves a block (m=2kg) ,a spring (k=10N/m)and a damping force F=-rv. How much energy is lost during these five cycles
A He-Ne laser beam with an intensity of 1.00 103 W/m2 is incident from air to dense flint, Find the intensity of the beam transmitted into the dense flint
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