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In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. In one instance, the radius of the circle is 0.658 m. At one point on this circle, the ball has an angular acceleration of 65.0 rad/s2 and an angular speed of 16.8 rad/s.
(a) Find the magnitude of the total acceleration (centripetal plus tangential) of the ball.
(b) Determine the angle of the total acceleration relative to the radial direction.
An alpha particle (q = 2e and m = 6.64e-27 kg) is accelerated from rest through a potential difference of 1.2e+5 volts. Find the speed of the particle after being accelerated
Given two vectors a = 3.1i -3.4j and b =6.7i+8.7j, What is the magnitude (in m) of the vector a, Find the direction (in ° = deg) of the vector a, Find the magnitude of the vector b
A 25.0mH inductor is connected in series with a 50.0 ohms resistor, a 15.0 mH inductor and a 60.0 Hz 140.V rms source. Draw the reactance diagram for the circuit
The total mechanical energy of the spacecraft, assume that the gravitational potential energy is zero at an infinite distance from the Earth.
How many 185 W lightbulbs can you use in a 191 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 131 V.)
If an electric field strength greater than 3.88E+6 N/C causes the air to break down and conduct charge (lightning), what is the maximum charge the cloud can hold
A parallel plate capacitor is composed of two square plates, 13.5 cm on a side, separated by an air gap of 0.80 mm, Find the new energy stored in the capacitor
In a series R-L-C circuit, L = 0.205H , C = 80.5?F and the voltage amplitude of the source is 260V, What is the resonance angular frequency of the circuit
an object has a kinetic energy of 312 J and a momentum of magnitude 20.3 kg × m / s 1, find the speed of the object
A worker pushes horizontally on a large crate with a force of 304 N and the crate is moved 4.4 m. How much work was done.
She moves her family to New York and begins work. Three months later, she is fired for no stated cause. Could she successfully sue for reinstatement or pay?
A 210, 50-cm-diameter turntable rotates on frictionless bearings at 67. A 25 block sits at the center of the turntable. A compressed spring shoots the block thoroughly outward next to a frictionless groove in the surface of turntable.
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