PHYSICS HIGH SCHOOL

Which of the following can be determined by studying the spectrum of a star?the chemicals in the atmosphere of the star
the motion of the star
the temperature of the atmosphere of the star
all of the above

Answers

Answer 1
Answer:

Answer:

all of the above

Explanation:

The spectrum of the star is is used to study its composition, motion and surface temperature. The absorbed or emitted wavelength indicates the elements present. The peak wavelength determines the surface temperature of the star using Wein's law. Peak wavelength is inversely proportional to temperature. The red-shift or blue shift indicates whether the star is moving away or towards us.

Answer 2
Answer: The right answer for the question that is being asked and shown above is that: "all of the above." the following that can be determined by studying the spectrum of a star includes: the chemicals in the atmosphere of the star; the motion of the star; the temperature of the atmosphere of the star.

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The force acting between two charged particles A and B is 5.2 × 10-5 newtons. Charges A and B are 2.4 × 10-2 meters apart. If the charge on particle A is7.2 × 10-8 coulombs, what is the charge of particle B?(k = 9.0 × 109 newton·meters2/coulomb2)A 2.4 × 10-2 coulombsB 4.6 × 10-11 coulombsC 5.2 × 10-11 coulombsD 7.2 × 10-8 coulombs
A body mass 30 kg is traveling in space at a speed of 10 m/s. Given that the formula for kinetic energyis KE = 0.5 * m * v^2, and m is mass, v is speed
What is the speed of a boat that travels 20 miles in 60 minutes? Please answer in miles per hour.Formula : speed = distance time
As current flows through a uniform wire, the wire gets hotter because the electrons stop moving and therefore transform their lost kinetic energy into thermal energy in the wire. as current flows through a uniform wire, the wire gets hotter because the electrons stop moving and therefore transform their lost kinetic energy into thermal energy in the wire. a. True b. False

Why is it necessary that the solar concentrators used by solar power plants be able to move throughout the day?

Answers

to track the sun as it moves through out the day
To track the sun as it's moving across the sky. Hope this helps! 

Our Sun is all of the following EXCEPT ____.a. part of a binary system
c. a yellow star
b. a main sequence star
d. of average absolute magnitude

Answers

Answer:

part of a binary system

Explanation:

Sun is a yellow star, it is a G-type main sequence star. It is yellow dwarf star. It is white but from our earth, it appears yellow. So it is a yellow star.

As mentioned, yes it is a main sequence star.

It is our main part of solar system so it appears to be huge for our earth, however it stands medium in the size among all other billions of stars in the universe.

Sun is solo star, It has no companion star associated with it (as with other stars which have one or more companion star with them making binary or tertiary etc system).

A) Part of a binary system. There is no evidence to suggest that the Sun has a companion star.

Comic strip hero Superman meets an asteroid in outer space and hurls it at 100 m/s. The asteroid is on thousand times more massive than superman is. In the strip, superman is seen at rest after the throw. Taking physics into account, what would be his recoil speed?

Answers

Answer:

Recoil speed = -100,000 m/s

Explanation:

First, this is an exercise that has relation with angular momentum.

So, you need to use the expressions for momentum.

Now, we can assume that Superman and the asteroid are initially at rest, so both moments are 0.

If superman hurls the asteroid, this means that  he should have an equal moment but in the opposite direction of the asteroid, therefore, he also have an opposite recoil moment.

The expression to use is the following:

innitial momentum = final momentum

The final momentum, is the combination of superman recoil moment, and the asteroid so:

0 = Mass * Velocity

Let M1 and V1 be the mass and velocity of superman, while M2 and V2 would be the asteroid, thus we have:

0 = M1 * V1 + M2 * V2

As the problem states, the asteroid is 1000 times more massive than superman, so we can say that M2 = 1000M1. Replacing in the above expression we finally have:

0 = M1 * V1 + 1000M1 * V2

M1 * V1 = -1000M1V2 -----> Simplify M1

V1 = -1000V2

V1 = -1000 * 100

V1 = -100,000 m/s

This would be the recoil speed of Superman.

Answer:

-100,000m/s

Explanation:

Choose the best answer for each situation. a scientist with the epa examining water for contamination writes down that there was an iridescent sheen on the surface of the water. what type of data did the scientist record? a scientist needs to know the temperature of the water every 5 m along 3 km of the river. what tool would the scientist use?

Answers

  • qualitative data
  • electronic temp probe

-type of data did the scientist record was qualitative data.

-tool the scientist would use is electronic temp probe

  • The scientist recorded an illustration of qualitative data.
  • He is recording the water's quality as perceived by him since he noted explicitly that the water's surface had an iridescent sheen.
  • This makes the kind or condition qualitative data because it cannot be expressed numerically.

What is an electronic temperature probe ?

  • Electronic thermometers use thermoresistive devices, in which the electrical resistance alters in response to changes in temperature, to detect temperature changes.
  • The tip of a probe contains this device, which could be a thermocouple or a thermistor.

To learn more about qualitative data visit:

brainly.com/question/17741728

#SPJ4

Answer:

The first one is qualitative data

The second one is electronic temp probe

Explanation:

A a0 is the amount of heat needed to raise the temperature of one kilogram of water one degree centigrade.

Answers

The correct answer that would best complete the given statement above would be the term KILOCALORIE. A KILOCALORIE  is the amount of heat needed to raise the temperature of one kilogram of water one degree centigrade. On the other hand, the amount of heat needed to raise the temperature of one gram of water one Centigrade degree is calorie. Hope this answer helps.

I got this correct on Odyssey-ware the answer is Kilocalorie

A box is being pulled to the right on flat ground with a force of 112 N at an angle of 42° to the horizontal. What is the x-component of the force of tension?

Answers

The x-component is related with the Force through the trigonometric function cosine.

cos(42°) = x-component / F ⇒ x-component = Fcos(42°) = 112N*0.743 = 83.2 N

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