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A dentist's drill starts from rest. After2.90s of constant angular acceleration it turns at a rate of2.2104rev/min.
(a) Find the drill's angular acceleration.
rad/s2
(b) Determine the angle (in radians) through which the drill rotates during this period.
rad
A vertical straight wire carrying an upward 21-A current exerts an attractive force per unit length of 8.3×10?4N/m, What is the magnitude of the current in the second wire
in a typical Van de Graaff linear accelerator, protons are accelerated through a potential difference of 20 MV. What is their kinetic energy if they started from rest
What is the flux of Zn moving down the rod? Write down all your assumptions (hint: you will need to look up the density of copper. You do not need to account for the variation in density with alloy composition). Clarify what the boundary conditions w..
Calculate the Q-value of the alpha decay of 211Po. It was found that 211Po can follow an alpha decay to an meta state. The alpha energy in this decay is 7.275 MeV
The force involved in a collision is 1.0 × 10^2 newtons. What is the value of the change in momentum
Block A in the figure weighs 1.60 N and block B weighs 3.10 N. The coefficient of kinetic friction between all surfaces is 0.300. Illustrate what is the friction force on block A?
The output signal intensity of the transducer is 40 Watt / cm2. The echo returning from a reflector deep inside the patient is 0.025 Watt / cm2. How many dB is the ratio of output signal to echo?
A 80 g, 33-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing by its center. A 11 g ball of clay traveling horizontally at 2.5 m/s hits and sticks to the very bottom tip of the rod.
A 46.6 ?F capacitor is connected to a 46.7 ? resistor and a generator whose RMS output is 24.4 V at 54.0 Hz. Calculate the phase angle for the circuit
a baseball pitcher throws a fastball across home plate. the ball crosses the plate, calculate the speed of a baseball that takes .010 s to cross home plate, .30 m from front to back
Florence, who weighs 120 lbs, stands on a bathroom scale in an elevator. What would the scale read when the elevator is accelerating downward at 2m/s2.
A 60 gram iron at 60o C is dropped into 200 gram of water at 20o C, What is the final equalibrium temperature of the system
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