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LenaWriter [7]
3 years ago
7

How can voltage be induced in a wire with the help of a magnet?

Physics
1 answer:
babunello [35]3 years ago
3 0
If you move a magnet through a loop of wire, induction will happen. The more loops you make, the stronger the effect becomes.
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The separation between two magnets is reduced by a factor of 5. How does the force between them change?
gtnhenbr [62]

Answer:Increase by a factor of  25

Explanation:

We know that magnetic force is proportional to \frac{1}{r^2}

where r is the distance between them

F\propto B\propto \frac{1}{r^2}

Thus F\propto \frac{1}{r^2}

Where B=magnetic field

If distance is reduced by a factor of 5 then force must increase by a factor of 25 because

r\rightarrow \frac{r}{5}

so F\propto \dfrac{1}{(\frac{r}{5})^2}

F\propto \frac{25}{r^2}

7 0
3 years ago
Which of the following is the same size as Pluto?
coldgirl [10]
I would say it's <span>C. the Moon
</span>
4 0
3 years ago
Read 2 more answers
A taxi starts from Monument Circle and travels 5 kilometers to the east for 5 minutes. Then it travels 10 kilometers to the sout
Morgarella [4.7K]

Answer: The taxi is moving with reference to A) Monument Circle. For each leg of the trip, the taxi's A) Average speed stays the same, but it's B) Average velocity changes.

Explanation: Brainliest Please!!!!

7 0
3 years ago
An above ground swimming pool of 30 ft diameter and 5 ft depth is to be filled from a garden hose (smooth interior) of length 10
STALIN [3.7K]

This question involves the concepts of dynamic pressure, volume flow rate, and flow speed.

It will take "5.1 hours" to fill the pool.

First, we will use the formula for the dynamic pressure to find out the flow speed of water:

P=\frac{1}{2}\rho v^2\\\\v=\sqrt{\frac{2P}{\rho}}

where,

v = flow speed = ?

P = Dynamic Pressure = 55 psi(\frac{6894.76\ Pa}{1\ psi}) = 379212 Pa

\rho = density of water = 1000 kg/m³

Therefore,

v=\sqrt{\frac{2(379212\ Pa)}{1000\ kg/m^3}}

v = 27.54 m/s

Now, we will use the formula for volume flow rate of water coming from the hose to find out the time taken by the pool to be filled:

\frac{V}{t} = Av\\\\t =\frac{V}{Av}

where,

t = time to fill the pool = ?

A = Area of the mouth of hose = \frac{\pi (0.015875\ m)^2}{4} = 1.98 x 10⁻⁴ m²

V = Volume of the pool = (Area of pool)(depth of pool) = A(1.524 m)

V = [\frac{\pi (9.144\ m)^2}{4}][1.524\ m] = 100.1 m³

Therefore,

t = \frac{(100.1\ m^3)}{(1.98\ x\ 10^{-4}\ m^2)(27.54\ m/s)}\\\\

<u>t = 18353.5 s = 305.9 min = 5.1 hours</u>

Learn more about dynamic pressure here:

brainly.com/question/13155610?referrer=searchResults

7 0
3 years ago
A graduated cylinder contains 17.5 ml of water. When a metal cube is placed onto the cylinder, its water level rises to 20.3 ml.
igomit [66]

Answer:

V=2.8 ml

Explanation:

volume of the cube is it would be 20.3 - 17.5 ml so 2.8 ml.

8 0
3 years ago
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