3 years ago

What is the farthest distance parallaxes can be used to measure star distances from Earth?

1 answer:

8 0

Using current technology, useful parallax measurements can only be found for stars up to about 340 light years (100 parsecs) away.

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Which of the following statements about globular clusters is true? All stars in the cluster have approximately the same mass. Al

Lilit [14]

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Most stars in the cluster are yellow or reddish in color. Most

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2 years ago

You are tasked with calibrating the springs for a pinball machine. Your method of testing the springs is by attaching masses ont

choli [55]

Answer:

$490.5\ \text{N/m}$

Explanation:

m = Mass attached to spring = 14 kg

g = Acceleration due to gravity = $9.81\ \text{m/s}^2$

x = Displacement of spring = $78-50=28\ \text{cm}$

k = Spring constant

The force balance of the system is given by

$kx=mg\\\Rightarrow k=\dfrac{mg}{x}\\\Rightarrow k=\dfrac{14\times 9.81}{0.28}\\\Rightarrow k=490.5\ \text{N/m}$

The spring constant for that spring is $490.5\ \text{N/m}$ .

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3 years ago

Define Plateau period.

Amiraneli [1.4K]

A plateau period refers to a period in life where you are kind of stuck in the middle. There is little growth or decline so you are kind of at a standstill.

please vote my answer brainliest. thanks!

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3 years ago

In a lab,two pieces of cellphane tape are placed on a lab table. They are quickly ripped off the lab table. Which would you pred

galben [10]

Answer:

they would repel each other

Explanation:

they have gained the same charge

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3 years ago

A child pushes a 75 N toy car across the floor. What is the mass of the car?

GaryK [48]

Answer:

7.6 kg

Explanation:

w=75N

w=mg

m=w÷g

m=75÷9.8

m=7.6kg

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3 years ago