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A 2.00 kg ball is attached to the bottom end of a length of a string 0.60 m in lenght. The top end of the string is held stationary. The ball is released from rest with the string taut and horizontal (theta = 90.0 °). Find (a) speed of the ball as it swings through the lowest point (theta = 0 °) , and (b) the tension in the spring at that point.
A small mailbag is released from a helicopter that is descending steadily at 2.71 m/s. How far is it below the helicopter
An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. How fast is it going when the nose leaves the station
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.1. How far behind the pinhole should you place the viewing screen
The inner and outer surfaces of a cell membrane carry a negative and positive charge, respectively. What is the magnitude of the electric field in the membrane
The threshold of dark-adapted (scotopic) vision is 6.0 x 10-11W/m2 at a central wavelength of 500 nm. how many photons per second enter the eye
A 915 N crate rests on the floor. How much work is required to move it at constant speed5.5 m vertically
A certain heat engine does 12.0 kJ of work and dissipates 8.00 kJ of waste heat in a cyclical process. What was the heat input to this engine
Two blocks are connected by a string. The smooth inclined surface makes an angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.70 kg. The mass of the hanging block is m= 2.90 kg. Find the direction of the hanging blo..
On a humid day, an electric field of 2.00 * 10^4 N/C is enough to produce sparks about an inch long. Suppose that in your physics class, use Coulomb's law to calculate the electric field at the surface of the sphere
Explain how much mechanical energy is lost due to friction acting on the runner? How far does he slide?
When Apollo 11 landed on the moon, the time delay for Neil Armstrong's voice to travel from the moon to Earth would be equivalent to the delay from hearing a speaker 439.5 m away. how far away is the moon
The rotor of an electric motor has rotational inertia Im = 7.59 x 10-3 kg·m2 about its central axis. The motor is used to change the orientation of the space probe in which it is mounted. The motor axis is mounted along the central axis of the probe;
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