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Three balls with masses of 3.0 kg, 1.0 kg, and 5.0 kg are located at coordinates (8.0m,8.5m), (8.5m,4.5m), and (4.5m,1.0m), respectively, and are connected by massless rods. What is the x-coordinate of the center of mass? For the three balls above, what is the y-coordinate of the center of mass?
A Carnot engine performs work at the rate of 380 kW when using 730 kcal of heat per second. If the temperature of the heat source is 560 C, at what temperature is the waste heat exhausted.
A spring whose stiffness is 1000 N/m has a relaxed length of 0.49 m. what is the change in the potential energy of the spring
A charge of ?3.00nC is placed at the origin of an xy-coordinate system, find the x and y components of the total force and Find the direction of this force
Two force vectors point in opposite directions and have the same magnitude. If their magnitudes are 36.5 Newton’s, then what is the magnitude of their sum?
Visitors at a science museum are invited to sit in a chair to the right of a full-length diverging lens (f1 = -2.94 m), Find the overall magnification of the friend when viewed through both lenses
The catapult on an aircraft carrier can take an aircraft from 0 to 197 mph ( the launch speed) in 5 Seconds, at which time the aircraft launches
A photon of red light (wavelength = 710 nm) and a Ping-Pong ball (mass = 2.10 × 10-3 kg) have the same momentum. At what speed is the ball moving
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz, find the wavelength of the radio waves from this station
A 10 Newton effort force is required to lift a 10kg box just off the ground. What is the effort required to lift the box off the ground using a 3m long lever.
Where can a third charge be placed. To what common temperature must the two pieces be heated in order that the cylinder just fit over the piston.
Two football players are moving toward each other in a straight line. Number 56 has a mass of 120 kg, Determine the velocity (magnitude and direction) of players, after the collision, before they hit the ground
A 240-V dc motor has an armature whose resistance is 1.10? . When running at its operating speed, it draws a current of 16.0A, What is the back emf of the motor when it is operating normally
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