3 years ago

Human impact on the environment

Physics

1 answer:

Sergeeva-Olga [200]3 years ago

8 0

Answer:

we have caused global warming, we have caused the enhanced green house effect

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tresset_1 [31]

Answer:

the larger the mass, the greater the gravitational pull of an object

Explanation:

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3 years ago

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A round loop of wire carries a current of 100 A, has a radius of 10 cm, and its normal (vector) makes an angle of 30∘ with a mag

Oliga [24]

Answer:

0.823 Nm

Explanation:

current, i = 100 A

radius, r = 10 cm

Angle between the normal and the magnetic field, θ = 30°

Magnetic field, B = 0.524 T

Torque is defined as the

$\tau = i \times A\ B\times sin\theta$

$\tau = 100 \times 3.14\times 0.1\times 0.1\ 0.524\times 0.5$

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Thus, the torque is 0.823 Nm.

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4 years ago

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The answer is water!!!

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3 years ago

A 55 kilogram person jumps off a cliff and hits the water 5.8 seconds later, how high is the cliff above the water?

ElenaW [278]

R=ut+gt^2/2
r- displacement (height to find)
u - initial speed (zero)
t - time taken

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3 years ago

A wire has a cross sectional area of 4.00 mm2 and is stretched by 0.100 mm by a certain force. How far will a wire of the same m

Nina [5.8K]

Answer: $0.05\ mm$

Explanation:

Given

Cross-sectional area of wire $A_1=4\ mm^2$

Extension of wire $\delta l=0.1\ mm$

Extension in a wire is given by

$\Rightarrow \delta l=\dfrac{FL}{AE}$

where, $E=\text{Youngs modulus}$

$\Rightarrow \delta_1=\dfrac{FL}{A_1E}\quad \ldots(i)$

for same force, length and material

$\Rightarrow \delta_2=\dfrac{FL}{A_2E}\quad \ldots(ii)$

Divide (i) and (ii)

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3 years ago