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A roller coaster goes through a complete loop. If the train is given an initial speed of v0 = 30 m/s, what is the largest value that the radius R can have if the car is to remain in contact with the circular track at all times?
The coefficient of performance of a refrigerator is 4.70. The compressor uses 20.0J of energy per cycle. How much heat energy is exhausted per cycle
Two blocks are connected over a massless, frictionless pulley, What is the value of the tension in the string
the 1400 turn coil in a dc motor has an area per turn of 1.1 multiplied by 10-2 m2. the design for the motor specifies
A 0.7 kg block of ice is sliding by you on a very slippery floor at 3.5m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with ice block for 0.003 seconds.
In a classroom demonstration, a 79.2-kg physics professor lies on a "bed of nails." what is the average pressure at each contact
An ideal spring is lying horizontally on a frictionless surface, find the oscillation frequency of a 2.5 kg blcok under the same circumstances
Gas is contained in an 6.5 L vessel at a temperature of 20°C and a pressure of 9.8 atm. How many molecules are in the vessel
An 1100 kg airplane starts from rest; 7.1s later it reaches its takeoff speed of 40m/s. What is the average acceleration of the airplane during this time?
A 47.0 g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a height of 23.8 m. determine the kinetic energy of the ball at its highest point
The cable of the 1300 kg elevator cab in the figure snaps when the cab is at rest at the first floor, Find the speed of the cab just before it hits the spring
an elephant can runat a steady speed of 10m/sec and can stop in 2.5 sec what is the average acceleration of the elephant while stopping
You use a HeNe laster, which has a wavelength of 633 nm, What is the vibrational frequency of the vibration corresponding to this peak
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