If it takes 150 n of force to move a box 10 meters, what is the work done on the box?

A closed flat loop conductor with radius 2mm is located in a changing uniform magnetic field. If the emf induced in the loop is

BARSIC [14]

Answer:

Rate of magnetic field is 15923.668 T/sec

Explanation:

We have given radius of loop conductor r = 2 mm = 0.002 m

Induced emf = 2 volt

As the magnetic field and plane are perpendicular to each other so angle between magnetic field and area is 0°

Cross sectional area of the conductor is equal to $A=\pi r^2$

$A=3.14\times 0.002^2=1.256\times 10^{-6}m^2$

Induced emf is given by $e=\frac{-d\Phi }{dt}=-A\frac{dB}{dt}$

$2=1.256\times 10^{-6}\times \frac{dB}{dt}$

$\frac{dB}{dt}=159235.668T/sec$

6 0

3 years ago

A stunt-rider on a motorcycle rides down a ramp and into a vertical loop-the-loop. If the diameter of the loop is 7.50 m, then t

VikaD [51]

Answer:

v = 6.06 m/s

Explanation:

In order for the rider to pass the top of the loop without falling, his weight must be equal to the centripetal force:

$Centripetal Force = Weight \\\frac{mv^2}{r} = mg\\\\\frac{v^2}{r} = g\\\\v = \sqrt{gr}$

where,

v = minimum speed of motorcycle at top of the loop = ?

g = acceleration due to gravity = 9.8 m/s²

r = radius of the loop = diameter/2 = 7.5 m/2 = 3.75 m

Therefore, using these values in equation, we get:

$v = \sqrt{(9.8\ m/s^2)(3.75\ m)}$

5 0

3 years ago

What is used to study the waves ?

rewona [7]

Answer:

Buoys can be used to measure the height, period and direction of waves. The buoy can even measure its own acceleration – this can tell scientists whether it is falling from the top of a high wave into a trough.:

5 0

3 years ago

Read 2 more answers

a balloon inflated in a room at 297k has a volume of 4.00 l. the balloon is then heated to a temperature of 331 k. what is the n

Naddika [18.5K]

V2 = 4.4579 L

Since pressure is constant, use Charle’s law.
Charles's law, a statement that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.

V(olume) 1 = V(olume) 2
————— —————
T(emperature) 1 T(emperature)2

4.00 L = V2
———- ———
297 K 331 K

Cross multiply
(4.00 L x 331 K) = (297 K x V2)
Simplify
1324 L/K = 297 K x V2
Isolate V2 by dividing out 297 K
1324 L/K = V2
————
297 K
(This cancels out the kelvin and leaves you with Liters as the volume measure)

V2 = 4.4579 L

Round to significant digits if required

7 0

2 years ago

What is the p.d. across a 4 resistor when there is a current of 0.3 A in it?

gregori [183]

Answer:

1.2V

Explanation:

Given parameters:

Resistance = 4Ω

Current = 0.3A

Unknown:

Potential difference = ?

Solution:

To find the potential difference, we use the ohms law;

V = IR

Now, insert the parameters and solve;

V = 0.3 x 4 = 1.2V

3 0

3 years ago