04/04/20

#### Physics EM induction

A pair of parallel conducting rails that are L = 22 cm apart lies at right angles to a uniform magnetic field of 0.5 T directed into the page. A R = 14  resistor is connected across the rails. A... more

04/04/20

#### Physics Problem

The 400-turn primary coil of a step-down transformer is connected to an ac line that is 120 V (rms). The secondary coil is to supply 15.0 A at 6.30 V (rms).1)Assuming no power loss in the... more

04/04/20

#### Physics Current

An ideal transformer produces an output voltage that is 500% larger (e.g. a 6-fold increase) than the input voltage.If the input current is 14 A (rms), what is the output current?

04/04/20

#### Physics Problem

The 400-turn primary coil of a step-down transformer is connected to an ac line that is 120 V (rms). The secondary coil voltage is 6.50 V (rms).Calculate the number of turns in the secondary coil

04/04/20

#### Physics Induction

A single-turn circular loop of wire that has a radius of 2.5 cm lies in the plane perpendicular to a spatially uniform magnetic field. During a 0.12-s time interval, the magnitude of the field... more

03/29/20

#### EMF of a square conductor moving in homogeneous magnetic field

We have a homogeneous magnetic field of strength 1T.There is a copper SQUARE conductor, moving by constant speed 1m/s in a direction parpendicullar to magnetic field lines, so we can measure... more

03/22/20

#### How fast is the skier moving at the top of the hill?

A skier is initially moving at 18.1m/s on level ground as they approach a hill that is angled upward at 16.3 degrees. The skier then slides up the hill over a diagonal distance of 4.8m (assume a... more

04/27/16

#### A 2.5 g steel ball moving 0.40 m/s collides elastically with a stationary, identical ball. As a result, the incident ball is deflected 30.00 from its initial...

A 2.5 g steel ball moving 0.40 m/s collides elastically with a stationary, identical ball. As a result, the incident ball is deflected 30.00 from its initial path.a. What is the velocity of the... more

04/26/16

#### An earth satellite orbits the earth in a circular orbit at a distance....

An earth satellite orbits the earth in a circular orbit at a distance of 1.5 x 104 km from the centre of the eartha. What is the speed of the satellite? (ans: 5200 m/s)b. What is the gravitational... more

04/26/16

#### The force of gravity on a wooden crate is 500.0 N. If it requires ...

The force of gravity on a wooden crate is 500.0 N. If it requires 1.5 x 103 J of work to push the crate at steady speed along the floor for a distance of 5.0 m, what is the coefficient of friction... more

09/23/15

#### WORD MATH PROBLEM

The speed of the current in a river is 4 miles per hour. A boat travels 18 miles downstream (with the current) in this river in the same time that it travels 10 miles upstream (against the... more

09/15/15

#### What is the average rate on the return trip

you ride your bike to campus a distance of 7 miles and returning home on the same route.Going to campus you ride mostly downhill and average 8 miles per hour faster than on your return trip home.... more

09/15/15

#### Potential at any point inside a chatged hollow sphere is constant.why?explain?

the field view is maximun for convex mirror.why?

09/10/15

#### Use your knowledge of acceleration, average speed, and running starts to explain why it happens?

A common track event is the 4x100m relay, where each athlete each run 100m and passes a baton to the next runner who then runs 100m, and so on until all four runners have gone. The runners... more

09/02/15

#### The distance between two points A and B on Earth is measured along a circle having center C at the center of Earth and radius equal to the

distance from C to the surface (see the figure). Assume the diameter of Earth is approximately 8,000 miles. If angle ACB has measure 1', then the distance between A and B is a nautical mile.... more

08/27/15

#### Junior Johnson won with an average speed of 125 miles per hour. The next year Marvin Panch won with an average speed of 150 miles per hour. What was the differ

Junior Johnson won with an average speed of 125 miles per hour. The next year Marvin Panch won with an average speed of 150 miles per hour. What was the difference in the race time between 1960 and... more

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