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Keith_Richards [23]

3 years ago

8

Change the following data into scientific notation. 5 000 000 km

1 answer:

RoseWind [281]3 years ago

8 0

To find out scientific notation, you want to make sure that number is less than 10. So do 5.000000, you don't rally need the zeros but I just want to make my point. So use 10^x meaning ten the whatever power adds zeros like 5.000000x10^6 meaning it is increasing it by six zeros moving it out of the decimals and letting become 5,000,000.

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Find the polar angle (in radians with respect to +x-axis) of −3i + j.

Gala2k [10]

Answer:

$-18.43^{\circ}$

Explanation:

Let $\theta$ be the polar angle of −3i + j. We can find it using the formula as follows :

$\tan\theta=\dfrac{y}{x}\\\\\tan\theta=\dfrac{1}{-3}\\\\\theta=\tan^{-1}(\dfrac{1}{-3})\\\\\theta=-18.43^{\circ}$

So, the required polar angle is $-18.43^{\circ}$ .

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2 years ago

2 Using the formula GPE = mxgxh, what are

vagabundo [1.1K]

Answer:

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3 years ago

The power in an electric circuit varies inversely with the resistance. If the power is 2,200watts when the resistance is 25 ohms

lana66690 [7]

Answer:

50ohms

Explanation:

If the power in an electric circuit varies inversely with the resistance, it can expressed as P = k/R where;

P is the power, R is the resistance and k is the constant of proportionality.

From the formula, k = PR

k = P1R1 = P2R2...(1)

Given P1 = 2200watts, R1 = 25ohms, P2 = 1100watts R2 = ?

From equation (1);

R2 = P1R1/P2

R2 = 2200×25/1100

R2 = 50ohms

The resistance when the power is 1100watts is 50ohms.

This shows that as the power is decreasing, the resistance is increasing.

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