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what is the magnitude of the tension in the string at the top of the new path (directly above the peg)?
To clear the net, the ball must rise at least 0.370 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racquet?
A 33 kg gun is standing on a frictionless sur- face. The gun fires a 45.7 g bullet with a muzzle velocity of 316 m/s. The positive direction is that of the bullet. Calculate the momentum of the bullet
Six charges, including both positive and negative ones, are placed in a configuration so that the electric potential at a certain location in space is 34.7 V. A seventh charge of -9.260e-6 C is bro
Once the chair is in motion, a 339 N horizontal force keeps it moving at a constant velocity. The acceleration of gravity is 9.81 m/s^2. What is the coeffcient of static friction between the chair a
A car traveling east at 38.0 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 2.90 s. How far does the car travel in the 2.90-s time period?
An ocean liner leaves New York City and travels 36.0° north of east for 112 km. How far east and how far north has it gone?
The velocity of a 2.30 kg block sliding down a frictionless inclined plane is found to be 1.58 m/s. 1.90 s later, it has a velocity of 9.56 m/s. What is the angle of the plane with respect to the h
Using energy principles and neglecting friction, find the angular speed after the grindstone has made 15.0 revolutions.
What is the velocity of the first person immediately after the snowball is thrown? Disregard friction between the skates and the ice.
Describe some of the 2 and 3 parameter correlations which support this claim, explaining what physical principals lie behind the correlations.
Estimate wavelengths of the first three spectral lines of in the Lyman spectral series for hydrogen. What energies (eV) do photons with these wavelengths have?
Show that, at high energies, where the average number of electrons per quantum state is small, the quantum-mechanical Fermi-Dirac approaches the classical Boltzmann distribution, N = exp(-E/kT)
The first person is initially moving forward with a speed of 2.10 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregar
A professor's office door is 0.90 wide, 2.0 high, and 4.0 thick; has a mass of 25 ; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of the door frame. When th
Suppose the weight of the sky diver is 915 N and the drag force has a magnitude of 1027 N. The mass of the sky diver is 93.4 kg. What is the magnitude of his acceleration.
A 21 g bullet traveling at 235 m/s is fired into a 0.432 kg wooden block anchored to a 100 N/m spring. How far is the spring compressed to the nearest thousandth of a meter?
The coil is flipped so its plane is perpendicular to themagnetic field in 0.050 s. What is the magnitude of the average induced emf?
Two sound sources radiating in phase at a frequency of 410 Hz interfere such that maxima are heard at angles of 0 and 20° from a line perpendicular to that joining the two sources. Find
A second fragment, whose mass is 3.5 kg, moves away from the point of explosion with a speed of 418 m/s along the negative x axis. What is the speed of the third fragment? Ignore effects due to grav
To determine if the ball clears the crossbar, what is its height with respect to the crossbar when it reaches the plane of the crossbar? The acceleration of gravity is 9.81 m/s2.
Two point charges, Q_1 = -6.9 mu C and Q_2 = 2.0 mu C are located between two oppositely charged parallel plates, as shown in the figure . The two charges are separated by a distance of x = 0.33 m.
What is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and magnetic fields of magnitude 4800 V/m and 3.5×10-3 T, respectively?
What is the new angular speed when the man walks to a point 0.8 m from the center? Assume that the merry-go-round is a solid 25 kg cylinder of radius 2.0 m.
Deer C is located 75° north of east relative to dear A. The distance between deer B and C is 92 m. What is the distance between deer A and C?