3 years ago

Is density the degree of compactness of a substance?

Physics

1 answer:

san4es73 [151]3 years ago

5 0

Yes it is, in other simplified terms density compares the amount of matter an object has to its volume.

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A magnetic field would be produced by a beam of

Oksi-84 [34.3K]

<span>A magnetic field would be produced by a beam of (3) protons.
Although you could easily make a case for any of these four options (the question is pretty ambiguous), there can be only one correct answer, which is the third option, in this case.
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7 0

4 years ago

A 50-loop circular coil has a radius of 3 cm. It is oriented so that the field lines of a magnetic field are perpendicular to th

nikitadnepr [17]

Answer:

-17.8 V

Explanation:

The induced emf in a coil is given as:

$E = \frac{-NdB\pi r^2}{dt}$

where N = number of loops

dB = change in magnetic field

r = radius of coil

dt = elapsed time

From the question:

N = 50

dB = final magnetic field - initial magnetic field

dB = 0.35 - 0.10 = 0.25 T

r = 3 cm

dt = 2 ms = 0.002 secs

Therefore, the induced emf is:

$E = \frac{-50 * 0.25 * \pi * 0.03^2}{0.002} \\E = -17.8 V$

Note: The negative sign implies that the EMf acts in an opposite direction to the change in magnetic flux.

6 0

3 years ago

Una mujer de 65 kg, se balancea sobre uno de los tacones de sus zapatos. Si el tacón es circular con un radio de 0,5 cm, ¿qué pr

goldenfox [79]

Explicacion

m = 65 kg

g = 10 m/s²

r = 0.5 cm (1m / 100 cm) = 0.05 m

A = π r² = π (0.05 m)² = 0.00785 m²

F =W = m g = 65 kg(10 m/s²) = 650 N

P = F/A = 650 N / 0.00785 m² = 82802.54 N/m²

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3 years ago

What is a disadvantage associated with many renewable or alternative energy sources

Alex Ar [27]

Its pretty expensive and can't be replaced immediately and some source like nuclear energy produces nuclear waste which produce radioisotope that is harmful for all living beings

5 0

3 years ago

1. Juan wants to measure the current traveling through the straight wire in his experiment. He

olga2289 [7]

Answer:

galvanometer

Explanation:

A galvanometer is an instrument that can detect currents.
Juan wants to measure the current traveling through the straight wire in his experiment. He uses a galvanometer as his tool. He places the wire in between two permanent magnets to measure the current created by the magnetic field.

5 0

3 years ago