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A current of 2.50 A passing through a heating coil immersed in 180 g of paraffin (specific heat capacity 2.00 jg^-1K^-1) raises the temperature from 5 c below room temperature to 5 c above room temperature in 100 seconds. What should be the reading of a voltmeter connected across the heating coil?
q1. a 1590 kg car starts from rest on a horizontal road and gains a speed of 61 kmh in 30 s a what is its kinetic
Two air-track gliders of equal mass are initially moving in the same direction along a straight line. What is the speed of the second glider
What would be the minimum width of the mirror if you are willing to accept that you must use two eyes to see the full width of your face
2.1 m length of straight wire carries a current of 30 A in a uniform magnetic field of 55 mT whose direction is at an angle of 37° from the direction of the current
An objects average density, p, is defined as the ration of its mass to its volume: p = M/V. The Earth's mass is 5.94x10^24 kg and its volume is 1.08x10^12 km^3
A soccer player kicks a ball that is on the ground down the field. The balls initial velocity is 10 m/s, 30 degrees above the horizontal. How long does is take for the ball to land down the field
A small block with mass 0.0525kg slides in a vertical circle of radius 0.0750m on the inside of a circular track. What is the magnitude of the normal force that the track exerts on the block when it is at the top of its path
During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires, How long does the car take to stop completely in seconds
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C, How much heat is discharged into the room
The maximum current in a superconducting solenoid can be as large as 3.61 kA. what is the magnitude of the magnetic field it produces
The other string is plucked in a different location, primarily exciting the 5th harmonic. The resulting sounds give rise to a beat frequency of 342 Hz. What is the wave propagation speed on the guitar strings?
A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
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