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A conducting rod slides at 4.0 m/s on metal rails separated by 2.0 m. If a current of 40 mA is generated in the circuit with resistance of 0.36 W, what is the magnetic field between the rails?
If the vertical component of Earth's magnetic field is 5.0 10-5 T, what is the emf induced between the blade tip and the central hub?
The gondola ski lift at Keystone, Colorado, is 2830 m long. On average, the ski lift rises 14.6o above the horizontal. How high is the top of the ski lift relative to the base?
A punter kicks a football with an initial velocity of 25 m/s at an angle of 60 degrees above the ground. what is the hang time of the football?
if the theremometar is then immersed in a sample of water of a mass 119 celsius and the combination reaches the final tempeture of 41.5 celsius, what was the initial tempeture of the water?
A small steel ball bearing with a mass of 29.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.33 m. Calculate the hori
A 4.20 kg steel ball strikes a wall with a speed of 7.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.200
You send a laser beam toward Earth traveling at velocity c relative to you. What do observers on the Earth measure for the speed of the laser beam?
How do I calculate the resonance frequency for a physics lab given that the L=.084Hz, C=.0015*10^-6F and that the total resistance in the circuit is 2434ohms?
The velocity of a particle moving in the xy plane is given by = (5.5t - 4.5t2)i + 8.3j , with in meters per second and t (> 0) in seconds. At t = 1.8 s and in unit-vector notation what positive t
The first person is initially moving forward with a speed of 2.50 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 chair of weight 145.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 40.0 N directed at an angle of 43.0 degrees below the horizontal and
A loudspeaker of mass 25.0 {rm kg} is suspended a distance of h = 1.60 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
A rifle is aimed horizontally at a target 47 {rm m} away. The bullet hits the target 2.0 {rm cm} below the aim point. What was the bullet's flight time?
What is the approximate fraction of the hydrogen atoms that are in the second excited state (and therefore could emit a photon)?
An object at rest on a flat, horizontal surface explodes into two fragments. One fragment is 7 times as massive as the other. The heavier fragment slides 8.70 m before stopping. How far does the li
A typical person radiates about 62 W of power at room temperature. How long does is take for a person to radiate away the energy acquired by consuming a 230 Calorie doughnut?
A 18.6g of Styrofoam carries a net charge of -0.686 uC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per un
A race car has a mass of 703 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
When an external resistor of resistance R1 = 16 Ω is connected to the terminals of a battery. Calculate: the internal resistance of the battery.
A small steel ball bearing with a mass of 23.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.43 m. Calculate the horiz
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, h, it is hit from below by a 15m g pellet traveling vertic
A 30.0 mu F capacitor initially charged to 30.0 mu C is discharged through a 2.10 kOmega resistor. How long does it take to reduce the capacitor's charge to 6.00 mu C?
A particle starts from the origin at = 0 with an initial velocity of 5.5 along the positive axis.If the acceleration is (-2.8 + 4.5 ), determine (a)the velocity and (b)position of the particle at t
A cargo plane is flying horizontally at an altitude of 11.4 km with a speed of 960 km/h when a large crate falls out of the rear loading ramp. (Ignore any effects due to air resistance.)