What is the magnetic field in air 0.05 m away from a long straight wire carrying current of 15A? An air-core solenoid with 2000 loops is 0.60 m long and has a...

What is the magnetic field in air 0.05 m away from a long straight wire carrying current of 15A? An air-core solenoid with 2000 loops is 0.60 m long and has a...

Two objects slide over a frictionless horizontal surface. The object A with a mass of 5000g is moves at a speed of 4.5m/s toward the object B (mB= 2500g) which is initially at rest. After the collision,...

An 0.050 m long wire carrying current of 30 A is placed in a uniform magnetic field, B = 0.80 T, such that the wire is oriented so it's length runs perpendicular to the field. Find the magnitude...

An electric motor rotating a workshop grinding wheel at a rate of 212 rev/min is switched off. Assume constant angular deceleration of magnitude 2.94 rad/s 2 . Through how many revolutions does the...

A rocket is standing by to launch. While sitting on the launching pad the rocket has zero velocity and thus zero initial momentum (p1=0). When the rocket takes off, a bystander proclaims that the...

When there is free fall there is work done then how the energy "mgh" remain constant all over the way.

A 1.5 tonne car travelling at 100km/h suddenly brakes. The brakes provide an overall force of 50 times the normal reaction. Calculate the acceleration of the car.

Suppose a company decides to ship 150 000 W over 2.0 Ω transmission lines at 560 V. a) How much power is lost? (and.I = 143,498 W) b) What is the efficiency of transmission?(ans...

Jose is trying to take apart an old bike. A rusty bolt is stuck and he thinks he should use a different wrench. What would be more effective for him to try?

What is the gravitational force between two 200 g masses that are 65 cm apart?

a test pilot whose mass is 85 kg is strapped into a large centrifuge machine for training. The machine spins rapidly to stimulate increased gravitational forces on the body. If the machine spins the...

Q1: a test pilot whose mass is 85 kg is strapped into a large centrifuge machine for training. The machine spins rapidly to stimulate increased gravitational forces on the body. If the machine spins...

A child's baton is 0.50 m long, and each end has a mass of 0.15 kg. What is the moment of inertia of the baton if the baton is twirled about the midpoint between the ends? Assume that the rod has...

The mass of Earth is 5.98x10^24 kg and the mass of the sun is 330,000 times greater than the mass of Earth. If the center of Earth is, on average, 1.495x10^11 m from the center of the Sun, calculate...

Consider two wheels with fixed hubs. The hub cannot move, but the wheel can rotate about it. The hubs are fixed to a stationary object. The hubs and spokes are mass-less, so that the moment of inertia...

A rocket with a total mass of 40 t (including fuel) rises vertically from rest. 30 kg of exhaust comes out of the engine every second at a speed of 6.0*10^3 m/s for 40 s before the fuel runs out....

The sodium lamp used in a physics laboratory gives out light uniformly. Suppose that the lamp uses 40 W. Calculate the magnitude of electric field?

The figure shows a thin rod of length L and charge Q. (Figure 1) Part A Find an expression for the electric potential a distance x away from the center of the rod on the axis of the rod...

A compact car, mass 825 kg, moving south at 15 m/s, is struck by a full-sized car, mass 1588 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. A.Find...

Two charges q1 = −3.20 nC and q2 = +8.15 nC are at a distance of 1.28 µm from each other. q1 is fixed at its location while q2 is released from rest. (a) What is the kinetic energy of...

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