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4 years ago

How does light spectra help us understand astronomy

1 answer:

7 0

Answer: From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star.

Explanation: The spectral line also can tell us about any magnetic field of the star. The light from the stuff between the stars allows astronomers to study the interstellar medium.

Hope this helps! :)

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Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific invest

Ne4ueva [31]

Answer:

Explanation:

8 0

4 years ago

The average distance from Earth to the Moon is 384,000 km.

Fofino [41]

Answers:

1) Time it takes to travel to the moon

Velocity $V$ is defined as:

$V=\frac{d}{t}$

Where:

$d=384,000 km$ is the average distance from Earth to the Moon

$V=800 km/h$ is the velocity of the spacecraft

$t$ the time

Isolating $t$ :

$t=\frac{d}{V}$

$t=\frac{384,000 km}{800 km/h}$

$t=480 h$ This is the time in hours

2) Time in days

A day is equivalent to 24 hours:

$1 day= 24 h$

Hence:

$t=480 h (\frac{1 day}{24 h})$

$t=480 h (\frac{1 day}{24 h})=20 days$ This is the time in days

3) Time in months

A month is equivalent to 30.4 days:

$1 month= 30.4 days$

Hence:

$t=480 h (\frac{1 day}{24 h})$

$t=20 days (\frac{1 month}{30.4 days})=0.65 months$ This is the time in months

6 0

3 years ago

When you ride your bike around a corner at 10 m/s, you are accelerating?

WINSTONCH [101]

When you ride your bike around a corner at 10 m/s, you are accelerating. Acceleration is caused by any forces. Sliding friction keeps you in the seat when a car goes around a corner. If you throw a ball into the air, Earth exerts a force on the ball.

5 0

3 years ago

Read 2 more answers

When a warm air mass collides with a cold air mass, the warm air mass rises above the cold air mass leading too:

nikdorinn [45]

Answer: It leads to a front. A front is.., I don't know how to explain it, so I'll add a picture. Fronts are made out of clouds and usually bring rain. So the answer is C: The formation of clouds and rain.

Explanation:

7 0

3 years ago

A spring hangs from the ceiling with an unstretched length of x 0 = 0.35 m . A m 1 = 6.3 kg block is hung from the spring, causi

Jlenok [28]

Answer:

x₂=0.44m

Explanation:

First, we calculate the length the spring is stretch when the first block is hung from it:

$\Delta x_1=0.50m-0.35m=0.15m$

Now, since the stretched spring is in equilibrium, we have that the spring restoring force must be equal to the weight of the block:

$k\Delta x_1=m_1g$

Solving for the spring constant k, we get:

$k=\frac{m_1g}{\Delta x_1}\\\\k=\frac{(6.3kg)(9.8m/s^{2})}{0.15m}=410\frac{N}{m}$

Next, we use the same relationship, but for the second block, to find the value of the stretched length:

$k\Delta x_2=m_2g\\\\\Delta x_2=\frac{m_2g}{k}\\\\\implies \Delta x_2=\frac{(3.7kg)(9.8m/s^{2})}{410N/m}=0.088m$

Finally, we sum this to the unstretched length to obtain the length of the spring:

$x_2=0.35m+0.088m=0.44m$

In words, the length of the spring when the second block is hung from it, is 0.44m.

3 0

4 years ago