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Question: One of two machines, alpha and beta, is to be purchased to provide for a new production operation in a factory. Machine alpha costs $10 000 and machine beta, $15 000. However, machine beta will result in an annual savings in operating costs of $800 over machine alpha. Which machine would you recommend purchasing and why, if each has a useful life of 10 years and money is worth 9 percent? Assume that both machines will be worthless at the end of 10 years. What value of annual savings of machine beta over machine alpha would result in each being equally desirable?
Two conductors made of the same material are connected across the same potential difference. Conductor A has twice the diameter and twice the length of conductor B. What is the ratio of the power delivered to A and to the power delivered to B?
A flywheel in the form of a uniformly thick disk of radius 1.53 m, has a mass of 12.1 kg and spins counterclockwise at 355 rpm. Calculate the constant torque required to stop it in 1.00 min
A box of mass 52 kg is pushed up an incline that has a total length of 7.0 m and is tilted 21° away from the horizontal. What is the work done by the applied force
(A) Calculate the current in the resistor 9.00µs after the resistor is connected across the terminals of the capacitor. (B) What charge remains across the capacitor after 8 µs (c) What is the maximum current across the resistor?
A photon is scattered 60.0° during a collision with an electron, which is initially at rest and gains a speed of 6.00× 106 m/s during the collision
an electron moving at 3.70 x 103 ms in a 1.45 t magnetic field experiences a magnetic force of 1.40 x 10-16 n. what
An automobile of mass 1500 kg moving at 25.0 m/s collides with a truck of mass 4500 kg at rest. What are the final velocities of the car and truck
Bernie B is walking directly toward the center of a vertical mirror M. How close to the mirror will he be when Sarah S is just able to see him The vertical mirror has a width d = 3.0 m.
A 100-watt light bulb is brighter than a 25-watt light bulb because it uses more power. Which bulb has a greater resistance, the 100-watt or the 25-watt light bulb
In coming to a stop, a car leaves skid marks 76 m long on the highway. Assuming a deceleration of 6.50 m/s2, estimate the speed of the car just before braking. Express in m/s.
Sucrose is allowed to diffuse along a 10 centimeter length of tubing filled with water. Find the difference in the concentration levels of sucrose at the two ends of the tube
A train traveling at v0 = 28.0 m/s begins to brake by applying a velocity-dependent instantaneous acceleration a(v) = ? /(v+u) m/s^2, Determine the distance traveled by the train until it comes to a complete stop
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