2 years ago

Select the correct answer from each drop-down menu.

Physics

1 answer:

nikklg [1K]2 years ago

8 0

Answer: what are the awnser choices

Explanation:

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A pencil has a density of 0.875 g/ml. It has a volume of 4.0 ml. Find the mass

loris [4]

Answer:

To find the mass using density and volume we just multiply them against each other which causes ml to cancel and just leaves us with grams which represents how much the item weights.

$mass=density*volume$

$mass=0.875\frac{g}{ml}*4.0\ ml$

$mass=3.5\ g$

Therefore, our final answer is that our pencil weight 3.5 grams

<u><em>Hope this helps! Let me know if you have any questions</em></u>

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2 years ago

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnet

nikitadnepr [17]

B south because north polarities line up with the opposite polarities

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4 years ago

If the mass is displaced 0.270 m from equilibrium and released, what is its speed when it is 0.130 m from equilibrium?

puteri [66]

Answer:

The speed is 1.52 m.

Explanation:

Given that,

Displacement =0.270 m

Distance = 0.130 m

Suppose a 0.321-kg mass is attached to a spring with a force constant of 13.3 N/m.

We need to calculate the angular velocity

Using formula of angular velocity

$\omega=\sqrt{\dfrac{k}{m}}$

Put the value into the formula

$\omega=\sqrt{\dfrac{13.3}{0.321}}$

$\omega=6.43\ rad/s$

We need to calculate the velocity

Using formula of velocity

$v=\omega\sqrt{A^2-x^2}$

Put the value into the formula

$v=6.43\times\sqrt{0.270^2-0.130^2}$

$v=1.52\ m/s$

Hence, The speed is 1.52 m.

6 0

3 years ago

What is the result of 1.58 divided by 3.793 written with the correct number of significant figures?

NISA [10]

0.41655681518586870551015027682573

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3 years ago

A runner starts from rest, runs for 30

aleksklad [387]

Answer:

u=0

t=30s

a=2m/s²

v=?

v= u+at

= 0+(30)(2)

= 60m/s

6 0

3 years ago