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3 years ago

5

Voyager 2 is a space probe, launched in 1977, to study the outer planets. It will continue to travel through space for thousands

of years without stopping. Which one of Newton's laws does this describe?
(I'm new to this website so Im just getting the hang of it)

2 answers:

lord [1]3 years ago

6 0

The 1st law I believe.

RUDIKE [14]3 years ago

3 0

1st law hope this helps

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Average velocity is different than average speed because calculating average velocity involves ?

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Direction!

Velocity is a vector quantity and speed is a scalar quantity. Vector quantities includes both magnitude and direction, while scalar quantities only have magnitude. :)

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(b) If you decrease the length of the pendulum by 25%, how does the new period TN compare to the old period T?

malfutka [58]

Answer:

The new period will be reduced by 50%

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When the length is decreased by 25%, the new length L₂ is given by;

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L₂ = 0.25L₁

$\frac{L_1}{T_1^2} = \frac{L_2}{T_2^2}\\\\T_2^2 = \frac{T_1^2L_2}{L_1} \\\\T_N^2 = \frac{T^2(0.25L_1)}{L_1}\\\\ T_N^2 =0.25T^2\\\\T_N = \sqrt{0.25T^2}}\\\\T_N = 0.5 T$

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3 years ago

Ice has a density of 0.920 g/cm3. An ice cubes mass is 100 g. What is its volume?

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Answer:

$\boxed {\tt 108.695652 \ cm^3}$

Explanation:

Volume can be found by dividing the mass by the density.

$v=\frac{m}{d}$

The mass is 100 grams and density is 0.920 grams per cubic centimeters.

Therefore,

$m=100 \ g \\d= 0.920 \ g/cm^3$

Substitute the values into the formula.

$v=\frac{100 \ g}{0.920 \ g/cm^3}$

Divide. Note that the grams, or "g" will cancel each other out.

$v- 108.695652 \ cm^3$

The volume of the ice cube is 108.697652 cubic centimeters.

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