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A hydraulic cylinder with a radius of 0.0281 m has a piston on the left end and a safety valve at the right end. The safety valve is a circular opening with a radius of 0.00650m, sealed with a disk. The disk is held in place by a spring (spring constant = 885 N/m) that is compressed 0.0100 m from its unstrained length. What is the magnitude of the minimum force that must be exerted on the piston in order to open the safety valve?
A simple pendulum uses a steel wire as the "string." The length of this wire is 1.5 m at room temperature. What is the change in the period of the pendulum
A wheelchair athlete is training on a stationary ergometer. Her wheel's angular velocity is 3 rev/s and diameter is 80.0 cm. What is the linear velocity at the wheel's circumference
In order to view the craters of the Moon, you construct a refracting telescope from a lens with focal length 92.3 cm as its objective and a 14.3-cm focal length lens as its eyepiece
A refrigerator moves energy from a cold reservoir (the inside of the refrigerator) to a hot reservoir (the kitchen), but some extra energy is required in the form of work done by some outside agent (typically a compressor motor).
A diver runs horizontally off the end of a 3 m high diving board at 6 m/s. How long does it take for the diver to hit the water
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force, calculate the radius of the circular path on which the particle would move if it were a..
On a spacecraft, two engines are turned on for 730 s at a moment when the velocity of the craft has x and y components of velocity v0x = 4040 m/s, Find the x and y components of the craft's acceleration
In order to measure the radial velocity of a star (the speed of motion towards or away from us) what type of instrument would be used and how would the data be used to derive the velocity?
A circular loop of radius 24.9 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.280 T pointing into the paper. Calculate the current induced in the loop during that time
A harmonic wave travels along an ideal rope from left to right. At the position we’ve marked as zero meters, we observe the rope reaching a maximum displacement of 15 cm every 2 seconds. We also notice that the distance between neighboring maxima ..
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, Calculate the acceleration of the elevator
q1. a plane is flying horizontally with speed 198 ms at a height 6640 m above the ground when a package is dropped from
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