3 years ago

120CD 165

Physics

1 answer:

mylen [45]3 years ago

7 0

I’m sorry I can’t understand

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The equation to calculate density is D = m/v. For a liquid substance, which item increases as heat is applied?

777dan777 [17]

Answer:

See below

Explanation:

Things generally expand when heated ....so volume increases while mass remains the same .....this will cause the value of density to decrease

6 0

2 years ago

A copper wire (density equal to 8900 kg / m3) 0.3 mm in diameter "floats" due to the force of the earth's magnetic field, which

Andrews [41]

Answer: $I=112.094\ A$

Explanation:

Given

density $\rho =8900\ kg/m^3$

diameter $d=0.3\ mm$

Magnetic field $B=5.5\times 10^{-5}\ T$

Force on the current carrying conductor placed in a magnetic field

$F=BIL\sin \theta$

where L=length of conductor

$\theta$ =angle between magnetic field and current

If the wire is floating then weight must be balanced by weight of wire

$Weight=mg=\rho ALg$

Therefore

$\rho ALg=BIL\times \sin 90$

$8900\times \frac{\pi}{4}(0.3\times 10^{-3})^2L\times 9.8=5.5\times 10^{-5}\times I\times L$

$I=\frac{8900\times \pi\times 9\times 10^{-8}\times 9.8}{4\times 5.5\times 10^{-5}}$

$I=112.094\ A$

5 0

3 years ago

Uncertainty in 21.0 C is A. 0.1 B. 0.2 C. 0.05

san4es73 [151]

it's A.0.1

that's the answer

4 0

2 years ago

Short-term memory is active, while long-term memory is:

Afina-wow [57]

Answer:

the answer is b. reflective

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3 years ago

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic sound that travels 1530 m/s in seawater. find the dept

kompoz [17]

It will travel 1530 m* 6 seconds =9180m. thus the depth there will be 9180/2=4590m.

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4 years ago