Find out the angular velocity of the wheel
A powered rotating disc roates with a constant 2.27 rad/s2 angular acceleration. After 3.98 s it has rotated through an angle of 60.7 radians. Find the angular velocity of the wheel at the beginning of the 3.98 s interval.
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If on striking the ground it embeds itself 7.00 in into the ground, find the magnitude of the acceleration (assumed constant) required to stop the arrow, in units of feet/second^2.
Two resistors R1 and R2 are in series with a 7.8 Volts battery. If R1 has a resistance of 2.0 Omega and R2 receives energy at the rate of 5.1 Watts, what is (are) the value(s) for the circuit's current(s)? (There may be more than one answer.)
Determine the electrical power that must be supplied to a heater submerged in the oil if the prescribed conditions are to be maintained.
The mass of each pulley of the system is m and the mass of the suspended object A is mA. Determine the force T necessary for the system to be in equilibrium.
In a special test for determining the performance of a heat exchanger, an electric heater produces a temperature variation in an airflow that can be approximated with a 1-Hz sine wave.
A rigid tank containing 20 kg of Refrigerant 134a as saturated vapor at 1.0 bars and -26.43 *C is heated until the temperature reaches 20 *C.
A 3.00 m diameter university communications satellite dish receives TV signals that have a maximum electric field strength (for one channel) of 7.20 µV/m. (a) What is the intensity of this wave? (b) What is the power received by the antenna?
How many unit cells are there in the foil? What is the mass of each unit cell if the density is 19.32 Mg/m3 (= 19.32 g/cm3)?
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When children are able to determine that the same amount of liquid is in two different sized containers, they have mastered
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The range of tasks that are too difficult for the child to master alone but that can be learned with the guidance and assistance of adults
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