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3 years ago

9

___________ are things that a scientist keeps the same during an experiment.

1 answer:

Keith_Richards [23]3 years ago

3 0

Answer:

independent variable

Explanation:

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Four balls have the same temperature. Which ball has the most thermal

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a bowling ball because it has the most mass.

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what does being diplomatic mean? *complying with instructions *having biased feelings or opinions created without adequate knowl

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As the phase angle is decreased, the power factor is

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3 years ago

A straight wire that is 0.60 m long is carrying a current of 2.0 A. It is placed in a uniform magnetic field of strength 0.30 T.

Degger [83]

Answer:

The angle the wire make with respect to the magnetic field is 30°

Explanation:

It is given that,

Length of straight wire, L = 0.6 m

Current carrying by the wire, I = 2 A

Magnetic field, B = 0.3 T

Force experienced by the wire, F = 0.18 N

Let θ be the angle the wire make with respect to the magnetic field. Magnetic force is given by :

$F=ILB\ sin\theta$

$\theta=sin^{-1}(\dfrac{F}{ILB})$

$\theta=sin^{-1}(\dfrac{0.18\ N}{2\ A\times 0.6\times 0.3\ T})$

$\theta=30^{\circ}$

So, the angle the wire make with respect to the magnetic field is 30°. Hence, this is the required solution.

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3 years ago

A car tire contains 0.0380m3 of air at a pressure of 2.20×105N/m2 (about 32 psi). How much more internal energy does this gas ha

emmasim [6.3K]

Answer:

$\Delta U = 11305 J$

Explanation:

As per ideal gas equation we know that

PV = nRT

here we know that

$P = 2.20 \times 10^5 Pa$

$V = 0.0380 m^3$

now we have

$nRT_1 = (2.20 \times 10^5)(0.0380) = 8360 J$

now for other case at zero gauge pressure we have

$P = 1.01 \times 10^5 Pa$

$V = 0.0380 m^3$

we have now

$nRT_2 = (1.01 \times 10^5)(0.0380) = 3838 J$

now the difference in internal energy of air is given as

$\Delta U = \frac{5}{2}nR\Delta T$

$\Delta U = \frac{5}{2}(8360 - 3838)$

$\Delta U = 11305 J$

6 0

4 years ago