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4 years ago

Which of the following truly describes the electromotive force?

2 answers:

7 0

The correct answer is
<span>voltage provided by a battery

In fact, the electromotive force (e.m.f.) of a battery corresponds to the voltage provided by the battery, and this voltage is provided by the work done by the battery which converts the chemical energy of the cell into electrical energy (the current in the circuit).</span>

KATRIN_1 [288]4 years ago

4 0

The correct answer is
voltage provided by a battery

it is the force required to move one unit of charge across the poles.

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A diagnostic sonogram produces a picture of internal organs by passing ultrasound through the tissue. In one application, it is

miss Akunina [59]

Answer:

1) $\lambda = 11\times 10^{-4} m$

2) $2.51\times 10^9 Pa$

Explanation:

Given data:

speed of sound v = 1540 m/s

frequency f = 1.40 MHz = 1.40 \times 10^6 Hz

density $\rho = 1060 kg/m^3$

1) we know that

$v = f\lambda$

$\lambda = \frac[v}{f} = \frac{1540}{1.40\times 10^6}$

$\lambda = 11\times 10^{-4} m$

2) we know that

$v= \sqrt{\frac{modulus}{density}}$

$v^2 = \frac{\gamma}{\rho}$

$\gamma = v^2 \rho$

$\gamma = 1540^2 \times 1060 = 2.51 \times 10^9 Pa$

6 0

4 years ago

What advantage does a telescope in space have over one located on the ground.

klio [65]

A telescope in space can focus on any object while a telescope on the ground cannot focus on the object it is on

7 0

4 years ago

There are two waves that we deal with everyday. Name them and describe them.

Likurg_2 [28]

Answer:

idk

Explanation:

idk

7 0

4 years ago

6. For a cell to produce a current, the

Reil [10]

Answer:

for a cell to produce a current the cell electrodes of the cell must have a potential difference option A is the correct answer

6 0

2 years ago

Read 2 more answers

A permanent magnet is pushed into a wire, left there for a while, and then pulled out. During which time does a current run thou

lakkis [162]

Answer:

C. while the magnet is moving

Explanation:

Electromagnetic induction implies the production of electric current by mere movement of a magnet with respect to a coil or wire.

In the given question, current would be induced in the wire only when the magnet moves. That is either when the magnet is pushed into a wire, or when pulled out. But no current would flow through the wire when the magnet is left there for a while.

The current is induced because of the motion involved. Thus, the appropriate option is C.

8 0

3 years ago