Question 1: How would you determine the length of Jupiter's orbit using Kepler's third
law? What information would you need?

Answers

Answer 1

Final answer:

To determine the length of Jupiter's orbit using Kepler's third law, information needed includes Jupiter's orbital period (11.86 years) and semimajor axis (5.20 AU). Using these, you verify the relationship P² ≈ a³ and calculate the orbit size.

Explanation:

To determine the length of Jupiter's orbit using Kepler's third law, you would need two key pieces of information: the time it takes for Jupiter to complete one orbit around the Sun (its orbital period) and the average distance of Jupiter from the Sun (its semimajor axis). Kepler's third law states that the square of the orbital period (P) of a planet is directly proportional to the cube of the semimajor axis (a) of its orbit, mathematically written as P² ≈ a³.

From this relationship, if you know one of the values (P or a), you can calculate the other. For Jupiter, its orbital period is approximately 11.86 Earth years, and its semimajor axis is about 5.20 Astronomical Units (AU). Using these values, you can confirm that its period squared is proportional to its semimajor axis cubed, which is consistent with Kepler's law. This law is valid for any two objects orbiting each other and does not depend on the masses of the planets or the Sun.

Thus, by knowing the values of Jupiter's orbital period or semimajor axis, Kepler's third law allows us to calculate and verify the expected size of its orbit around the Sun.

Answer 2

To determine the length of Jupiter's orbit using Kepler's third law, you need to know Jupiter's orbital period and the semi-major axis of its orbit.

Kepler's third law states that the square of the period of revolution (P) is proportional to the cube of the semi-major axis (a):

[tex]P^2 \propto a^3 \\[/tex]

The formula can be written as:

[tex]P^2 = k \cdot a^3 \\[/tex]
where k is the proportionality constant.

For objects orbiting the sun, k is approximately equal to 1 when P is in years and a is in astronomical units (AU).

Given Jupiter's orbital period (P) is 11.86 years and the semi-major axis (a) is 5.20 AU, you can verify the relationship by calculating:

[tex]P^2 = 11.86^2 = 140.83 \\[/tex][tex]a^3 = 5.20^3 = 140.61[/tex]

Since 140.83 ≈ 140.61, Kepler's third law holds true.


Related Questions

A missile is moving 1350 m/s at 25.0° angle. It needs to hit in a 55.0° direction in 10.20 s. What is the direction of its final velocity?

Answers

Answer:

final velocity = 3504 m/s  

Explanation:

Given data:

velocity of missile = Vi = 1350m/s

angle at which missile is moving = 25degree

distance between missile and targets = 23500m

angle between target and missile=55degree

time=10.2s

To find:

Final velocity: ?

Formula:

x = Vx*t + ½*ax*t²  

Let x be the horizontal component of distance

x = ertical component of distance

t-time

ax = horizontal component of acceleration

ay = Vertical component of acceleration

Vx = horizontal component of velocity

Vy = Vertical component of velocity

Solution:

x = Vx*t + ½*ax*t²

23500m * cos55.0º = 1350m/s * cos25.0º * 10.20s + ½ * ax * (10.20s)²  

ax = 19.2 m/s²  

V'x = Vx + ax*t = 1350m/s * cos25.0º + 19.2m/s² * 10.20s = 1419 m/s  

similarly vertically:

y = Vy*t + ½*ay*t² 

23500m * sin55.0º = 1350m/s * sin25.0º * 10.20s + ½ * ay * (10.20s)²  

ay = 258 m/s²  

V'y = Vy + ay*t

     = 1350m/s * sin25.0º + 258m/s² * 10.20s = 3204 m/s  

V = √(V'x² + V'y²)

   = 3504 m/s  


Dominic Roth is in a roller coaster car, which rapidly picks up speed as it rolls down a slope.
As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the
slope, his speed is 22 m/s. What is its average acceleration?​

Answers

Answer: 6m/s²

Explanation:

Acceleration = change in velocity / time

Initial velocity = 4m/s

Final velocity = 22m/s

Time = 3s

Acceleration = (22 - 4) / 3

a = 18 / 3 = 6m/s²

A car travels 1800 m south in 35 s, what is it's velocity?​

Answers

Answer:

its velocity is 51, or 51.42 to be exact it would be: 51.4285714286

what happens when a plastic lid sprinkled with iron filings is placed over a magnet?

Answers

When a plastic lid is sprinkled with iron filings is placed over a magnet then a pattern is formed. The iron fillings arrange themselves in a way how magnetic field is present. The force of the magnet is the strongest at the two ends because more iron particles are concentrated in these areas. The magnetic lines of flux flow from one end to the other.

You should never swim alone true or false

Answers

Answer:True

Explanation:

if you were to swim alone and something bad happen and there was none on the beach you'd be stuck out so NEVER swim alone :)

Ques
A skateboarder is cruising on his skateboard at 3 m/s and has a total mass of 70 kg. A friend jumps on
(from standing still). What is the new velocity of the skateboarder if the friend has a mass of 50 kg?

Answers

Answer:

When a particle or a system of particles move in a system where no external force acts, then the total linear momentum of the particle system remains constant.

Explanation:

Given data:

Total mass of the skateboarder, [tex]m_{1} = 70 \ kg[/tex]

Mass of the friend, [tex]m_{2} = 50 \ kg[/tex]

Initial velocity of the skateboarder, [tex]u_{1} = 3 \ m/s[/tex]

Initial velocity of the the friend, [tex]u_{2} = 0[/tex]

Let the new velocity of the skateboarder when his friend jumps be [tex]v[/tex].

From the conservation law of linear momentum,

[tex]m_{1}u_{1} + m_{2}u_{2} = (m_{1} + m_{2})v[/tex]

[tex]70 \times 3 + 50 \times 0 = (70 + 50)v[/tex]

[tex]\Rightarrow \ v &= 1.75 \ m/s.[/tex]

a bucket of unstretched springs (k=8 N/m) resting on the ground.Calculate the bucket's Mechanical Energy in [J}

Answers

Answer:

0 J

Explanation:

The mechanical energy of a spring is given by [tex]0.5kx^{2}[/tex] where k is spring constant and x is extension of spring. Since the spring is unstretched,  its extension is zero.

#Notice that the potential energy is 0.

-Substituting spring constant,  k with 8 and extension with zero then the mechanical energy will be

[tex]0.5\times 8\times 0^{2}=0 J[/tex]

List two ways you changed the speed of the ball without changing its direction..

Answers

By applying force on the object. Force changes the direction of motion of the object. For example : a soccer player control the motion of a soccer ball by applying a force. It will change the ball's direction not its speed.

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron? A 0.00578 J/g°C B 0.45 J/g°C C 2.20 J/g°C D 4.18 J/g°C

Answers

Answer:

b.

[tex]0.45J/g\textdegree C[/tex]

Explanation:

Specific heat capacity is the amount of heat required to raise one gram of substance by one degree celcius.

It's calculated by the formula:[tex]s=\frac{q}{m\bigtriangleup T}[/tex], where q=heat and m= mass

[tex]\bigtriangleup T=20-0=20\textdegree C\\q=1004J\\m=111.6g[/tex]

Therefore:

[tex]s=\frac{1004J}{111.6g\times20\textdegree C}\\=0.45J/g\textdegree C[/tex]

Hence the iron's specific heat capacity is [tex]0.45J/g\textdegree C[/tex]

1. For a reaction to occur, energy must be
to break chemical bonds.
O A released
OB converted
OC absorbed

Answers

For a reaction to occur, energy must be absorbed to break chemical bonds

Explanation:

Reactions can be classified as chemical reaction, nuclear reaction, thermal reaction. So in these three reaction types, the nature of energy will only be varying.

But in order to execute a reaction, there should be breaking of existing bonds and then formation of new bonds. So for breaking of the bonds of reactants, energy should be absorbed from the surrounding.

Then the extra energy will be released after forming the products. Thus, the process of absorption of energy will lead to endothermic process and the process of releasing of energy will lead to exothermic reaction. So for a reaction to occur, energy must be absorbed to break the chemical bonds.

Shay reacts solid zinc and aqueous copper sulfate to form aqueous zinc sulfate and solid copper. If he reacts 10.1 grams of zinc with 18.6 grams of copper sulfate and yields 20 grams of zinc sulfate and 8.7 grams of copper, then was mass conserved? explain how you know.

Answers

Answer:

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Explanation:

As we know that zinc reacts with copper sulfate

so the reaction is given as

[tex]Zn + CuSO_4 --> ZnSO_4 + Cu[/tex]

so here we have

[tex]Zn = 10.1 g[/tex]

[tex]CuSO_4 = 18.6 g[/tex]

[tex]ZnSO_4 = 20 g[/tex]

[tex]Cu = 8.7 g[/tex]

Now total mass of reactant is given as

[tex]M_1 = 10.1 + 18.6 = 28.7 g[/tex]

Mass of the product is given as

[tex]M_2 = 20 + 8.7 = 28.7 g[/tex]

Now since mass of reactant is equal to mass of the product after the reaction so we can say that mass conservation is applicable here

Carmen is heating some water and trying to measure the temperature of water using a Celsius thermometer. Which measurement can she expect once the water begins to boil?

32°C
100° C
212°C
373°C

Answers

100° C she can expect once the water begins to boil.

Option: B

Explanation:

The boiling point for water at 1 pressure atmosphere of sea level is 212 ° F or 100 ° C. That value isn't a fixed. Water's boiling point is dependent on the ambient pressure, which varies based on elevation. At a lower temperature, water boils as one gains altitude like getting higher on a hill, and boils at a higher temperature if one increases the atmospheric pressure of returning to or below sea level.

It also relies upon the water's purity. Water containing contaminants like salted water boils at a level higher than pure water. This effect is called acceleration of the boiling point and is one of the material's colligative features.

Answer:

option b) 100°

Explanation:

What is the momentum of an adult female that is 75 kg riding a bicycle travelling at a velocity of 30 km/h.

Answers

Answer:

Explanation:

momentum is written as p

p = mass * velocity

p = mv

30 km per hr = 30 * 1000 meters per 3600 seconds

velocity = 30000 meters per 3600 seconds

p = mv

p = 75 * 30000 / 3600

p = 625 kilogram per meter second

I hope my answer helps you and is correct

Please mark as brainliest

The momentum of an adult female weighing 75 kg and riding a bicycle at 30 km/h (8.33 m/s) is 625 kg·m/s.

To calculate the momentum of an adult female riding a bicycle, we use the formula for linear momentum, which is momentum (p) = mass (m) × velocity (v). First, we need to convert the velocity from kilometers per hour (km/h) to meters per second (m/s) since the standard unit for velocity in physics is m/s. The conversion is as follows: 30 km/h = 30 × (1000 m/3600 s) = 8.33 m/s. The mass of the adult female is given as 75 kg.

Therefore, the momentum of the adult female riding a bicycle is:

p = m × v = 75 kg × 8.33 m/s = 625 kg·m/s.

1. Does this kind of wave carry energy?
Transverse wave
Longitudinal wave​

Answers

Answer:

Yes they do

Explanation:

All waves (both transverse and longitudinal) transfer energy from one point to another.

(e.g think about sound waves (longitudinal) and light waves (transverse))

Noah stands 170 meters away from a steep canyon wall. He shouts and hears the echo of his voice one second later. What is the speed of the wave?

Answers

answer: 340 m/s

explanation: in this instance, the sound wave travels 340 meters in 1 second, so the speed of the wave is 340 m/s. remember, when there is a reflection, the wave doubles its distance. in other words, the distance traveled by the sound wave in 1 second is equivalent to the 170 meters down to the canyon wall plus the 170 meters back from the canyon wall.

The speed of the wave is 340 m/s. It can be calculated by dividing distance by time.

Given:

Distance = 170 meters

Time = 1 Seconds

What is Speed?

It is defined as the ratio between distance and time.

Speed = Distance /  Time

In this instance, The sound wave travels 340 meters in 1 second, So the speed of the wave is 340 m/s.

When there is a reflection, the wave doubles its distance. In other words, the distance traveled by the sound wave in 1 second is equivalent to  170 meters down to the canyon wall plus 170 meters back from the canyon wall.

Thus, the speed of the wave is 340 m/s.

Find more information about the Speed of waves here:

brainly.com/question/13867834

The diagram shows the protons and neutrons in an atom.
p = protons n = neutrons
Which fundamental force is shown?
O static
o electromagnetic
O strong
O light
p
7
na LA
P
n

Answers

Answer:

O strong

Explanation:

From the diagram, we are dealing with strong forces.

Strong forces are one of the four fundamental forces found in nature. The other forces are gravitational forces, electromagnetism and weak interactions.

Strong forces holds protons and neutrons together in an atom. They are domiciled in the nucleus and are sources of nuclear energy. They  are also called strong nuclear forces.

Answer:

Strong

Explanation:

Identify the correct Units for a Force

Answers

Answer:

Newton

Explanation:

Newton is the correct unit for a force

The correct answer is newton

An airplane travels 622.4 km from Kansas City to St. Louis. The flight takes 4.7 hours. Calculate the Velocity of the plane

Answers

Answer:

132.43km/h

Explanation:

Velocity = displacement/time

Given

Displacement = 622.4km

Time = 4.7 hours

Therefore,

Velocity = 622.4km/4.7hrs

= 132.43km/h

1) A force of 20 Newton acts on a bar having a cross sectional area of 0.8m^2 and length 10cm.calculate the stress developed in the bar​

Answers

Answer:25N/M^2

Explanation:

Force=20N Area=0.8M^2

Stress=force/area

Stress=20/0.8

Stress=25N/M^2

A slug traveling at 3 mm/h, East decided to race the slug next to him increasing his velocity to 5 mm/h, East in one hour. What was the slug's acceleration?

Answers

The Acceleration of  slug  would be 2 mm/hr²

Step by step Explanation:

Given of the solution

Initial velocity of the slug,(we can represent as [tex]v_{i}[/tex])  [tex]v_{i}[/tex]= 3 mm/hr

Final velocity of the slug,(we can represent as [tex]v_{f}[/tex] ) [tex]v_{f}[/tex]= 5 mm/hr

Time, t = 1 hr

Acceleration, a = ?

We know,

[tex]a = \frac{(5-3)}{1} \\\\a = 2 mm/hr^2[/tex]

Therefore, The Acceleration of  slug would be 2 mm/hr²

How much heat is required to raise the temperature of 0,20 kg of water from 15 degrees Celsius to 45 degrees Celsius?

Answers

Answer:

25116 J

Explanation:

The amount of heat required to raise the temperature of a substance is given by the equation

[tex]Q=mC\Delta T[/tex]

where

m is the mass of hte substance

C is the specific heat capacity of the substance

[tex]\Delta T[/tex] is the change in temperature

For the sample of water in this problem, we have:

m = 0.20 kg is the mass

[tex]C=4186 J/kg^{\circ}C[/tex] is the specific heat of water

[tex]\Delta T=45-15=30^{\circ}C[/tex] is the increase in temperature

Therefore, the amount of heat required is

[tex]Q=(0.20)(4186)(30)=25116 J[/tex]

A string of fifty 15 ohm Christmas tree lights are connected in series. One burns out, they all burn out.Calculate the total resistance. (Draw a one way switch to control all of them at once)

Answers

The effective resistance of many individual resistors in series is the sum of the individual resistances.

50 items in series, each with a resistance of 15 ohms, are equivalent to a single resistance of (15 x 50) = 750 ohms.

By the way . . . If one of the little bulbs in series burns out, all the others do NOT burn out. They simply get turned off and go dark, because the current can't flow through the one that did.

The total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

Total resistance of the series resistors

The total resistance of the series resistors is determined by adding all the componenets of the resistors together.

Rt = R1 + R2 + R3 + ----

where;

Rt is the total resistance of the series circuit

Rt = 50 x (15 ohms)

Rt = 750 ohms

Thus, the total resistance of the string of fifty 15 ohm Christmas tree lights that are connected in series is 750 ohms.

Learn more about total resistance here: https://brainly.com/question/2980867

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7. What two controls on a car cause a change in speed? What control causes a change in
velocity?

Answers

-- A change in speed can be either speeding up or slowing down. These effects can be caused by the gas pedal or the brake pedal.

-- Velocity is made of the car's speed and direction. These can be changed by the gas pedal, the brake pedal, or the steering wheel.

Final answer:

The two controls causing a change in car speed are the accelerator and brakes. For velocity, any change in speed or direction (affected by the accelerator and steering wheel) can alter it. An odometer measures distance traveled, while a speedometer measures instantaneous speed.

Explanation:

The two controls on a car that cause a change in speed are the accelerator (gas pedal) and the brakes. Pressing the accelerator increases the car's speed, while applying the brakes decreases it. The control that causes a change in velocity is both the accelerator and the steering wheel. This is because velocity includes both speed and direction. Thus, pressing the accelerator affects speed, which is a part of velocity, and turning the steering wheel alters the direction of the car's velocity.

Velocity is defined by both speed, which is a scalar quantity, and direction, a vector quantity. Changing either of these two or both simultaneously, results in a change in velocity. Acceleration, therefore, refers to the rate at which velocity changes over time and can occur due to a change in speed, direction, or both. For example, when a car moves from left to right at a constant velocity and the accelerator is pressed, both the velocity and acceleration vectors point rightwards. However, if the brakes are applied while the car is still moving to the right, the velocity remains directed to the right but the acceleration vector points to the left, indicating deceleration.

The car's odometer measures the total distance traveled, which is a scalar quantity, while the speedometer measures the instantaneous speed of the car, also a scalar. To illustrate the difference between average speed and the magnitude of average velocity consider a car trip where the car moves in a circle and returns to its starting point. The average speed is the total distance traveled divided by the elapsed time, whereas the magnitude of average velocity would be zero since displacement is zero after completing the loop. The two quantities are the same if the car travels in a straight line without changing direction.

A 5.00 kg crate is on a 21.0° hill.
Using X-Y axes tilted down the
plane, what is the y-component
of the weight?
(Unit = N)​

Answers

Answer: 4575N

Explanation:

For y component, W = mgcosø

W = 500×9.8cos21

W = 4574.54N

Find the diagram in the attached file

Answer:

-45.745

Explanation:

negative because it is downward

4a.) A 0.50 kg water balloon is thrown against a wall at 32 m/s coming to a stop. What was its change in
momentum?

Answers

Answer:

-16 kg m/s

Explanation:

Momentum is a vector quantity indicating the "amount of motion" in an object.

The change in momentum of an object is given by:

[tex]\Delta p = m(v-u)[/tex]

where:

m is the mass of the object

u is its initial velocity

v is its final velocity

For the water balloon in this problem, we have:

m = 0.50 kg is the mass

u = 32 m/s is the initial velocity

v = 0 m/s (since the balloon comes to a stop)

Therefore, the change in momentum is:

[tex]\Delta p=(0.50)(0-32)=-16 kg m/s[/tex]

And the negative sign indicates that the direction is opposite to the initial velocity.

A 2 kilogram mass is lifted 4 meters above the ground what is the change it gravitational energy

Answers

Answer:

78.4 J

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its location in the gravitational field.

The change in gravitational potential energy of an object is given by:

[tex]\Delta U=mg\Delta h[/tex]

where:

m is the mass of the object

[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity

[tex]\Delta h[/tex] is the change in height of the object

For the mass in  this problem, we have:

m = 2 kg is the mass

[tex]\Delta h = 4 m[/tex] is the change in height

So, its change in gravitational energy is:

[tex]\Delta U=(2)(9.8)(4)=78.4 J[/tex]

Definition: To stir, shake, mix, or otherwise move something in order to accelerate a reaction or other
change.

Answers

agitate... hope this helps.......

Final answer:

In Chemistry, to accelerate a reaction often involves using a catalyst to increase the reaction rate without the catalyst being consumed. Acceleration in Physics refers to a change in an object's velocity, as described by Newton's first law of motion.

Explanation:

The term 'to accelerate' typically implies speeding up any process or reaction. In the context of Chemistry, this often refers to increasing the rate at which a chemical reaction occurs. Factors that can accelerate a reaction include stirring, increasing temperature, or adding a catalyst. A catalyst is a substance that increases the speed of a reaction without being consumed in the process. Acceleration, specifically in Physics, is defined as the change in velocity - which can be in the magnitude or direction or both. Newton's first law of motion, also known as the law of inertia, states that a body at rest remains at rest, and a body in motion remains in motion at a constant velocity unless acted upon by a net external force — implying the role of acceleration when this state is altered.

Acceleration
a=124 -0)3
a (Vf-vilt
a velocity
Vf- fina velocity
t = time vizan
initial velocity

Answers

Answer:

[tex]41.3 m/s^2[/tex]

Explanation:

The acceleration of an object is the rate of  change of the velocity of the object.

It is a vector quantity, so it has a magnitude and a direction.

The acceleration is given by:

[tex]a=\frac{v_f-v_i}{t}[/tex]

where

[tex]v_f[/tex] is the final velocity

[tex]v_i[/tex] is the initial velocity

t is the time taken for the velocity to change

If the acceleration is positive, the direction is the same as the initial velocity; if the acceleration is negative, the direction is opposite to the initial velocity.

In this problem:

[tex]v_i=0[/tex] is the initial velocity

[tex]v_f=124 m/s[/tex] is the final velocity

t = 3 s is the  time

So, the acceleration is

[tex]a=\frac{124-0}{3}=41.3 m/s^2[/tex]

In a battery powered flashlight, how is energy converted

Answers

Answer:

The correct answers are "chemical energy into electrical energy" and then "the electrical energy into light energy". Explanation: In the battery-powered flashlight, the battery supplies the chemical energy which makes the electrons to flow in the circuit and constitutes the current

Explanation:

Question 15 (4 points)

The environmental impact of deforestation is decreased by using buffer zones of trees to prevent clear-cut areas from

looking so bare.

True

False

Answers

Answer:

True

Explanation:

Other Questions
Miltmar Corporation will pay a year-end dividend of $5, and dividends thereafter are expected to grow at the constant rate of 6% per year. The risk-free rate is 5%, and the expected return on the market portfolio is 10%. The stock has a beta of 0.76.a. Calculate the market capitalization rate. (Do not round intermediate calculations. Round your answer to 2 decimal places.) Market capitalization rate _____ %b. What is the intrinsic value of the stock? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Intrinsic value $ A memory error caused by exposure to incorrect data between the original event and a subsequent memory test of that event is called the __________ effect. Reader's Digest Association, Inc., has published Reader's Digest magazine for over 80 years, and many believe the publication is dated and can no longer attract many readers. They believe _____ plans are needed to revamp the magazine's content, editorial staff, and readership. A manufactured lot of buggy whips has 20 items, of which 5 are defective. A random sample of 5 items is chosen to be inspected. Find the probability that the sample contains exactly one defective item Which compound is most likely an example of a base?compound that forms as the result of a neutralization reactioncompound that tastes sourcompound that forms hydrogen when it reacts with a metalcompound that feels slippery Solve for q. 3q + 2 = 5 identify the numerical coefficient of the term 5xy The right to _______________, or the right of parties in a dispute to have their case determined by a group of ordinary citizens, dates back in England to the Magna Carta (1215). Frey Corp. is experiencing rapid growth. Dividends are expected to grow at 25 percent per year during the next three years, 18 percent over the following year, and then 8 percent per year, indefinitely. The required return on this stock is 15 percent, and the stock currently sells for $60.00 per share. What is the projected dividend for the coming year? List the laws of thermodynamic and describe their relevance in the chemical reactions2. Define the standard reduction potential. Why aerobic grow generates the highest amount ofenergy (ATP). if f(x) = 3x - 12, what is f(2)? -6-18186 9. A large electronic office product contains 2000 electronic components. Assume that the probability that each component operates without failure during the useful life of the product is 0.995, and assume that the components fail independently. Approximate the probability that five or more of the original 2000 components fail during the useful life of the product. 100 POINTS IF YOU CAN ANSWER ALL QUESTIONS!! PLUS BRAINLIEST, THANKS, RATINGS, ETC1. The Sun, like 80 to 90 percent of stars, is in which stage of life?A. main sequenceB. stellar formationC. red giantD. dying star2. How do scientists learn about the age of the solar system and its planetary bodies? Select the two correct answers.A. using radiometric dating of meteoritesB. comparing the composition of the gaseous planets to the rocky planetsC. analyzing impact craters on planetary body surfacesD. measuring distances between planets3. Which describe the study of spectroscopy? Select the two correct answers.a. the number of galaxiesb. interaction of light and atomsc. emission and absorption of lightd. reflection of light by Earth4. Which state of matter best describes the elements inside stars?a. plasmab. liquidc. solidd. gas5. Which are examples of non-visible light?a. white light from the sun and microwavesb. radio waves and ultraviolet lightc. white light from a lightbulb and rainbowsd. rainbows and X-rays6. Which is the first stage in the life cycle of a massive star?a. black holeb. white drawf c. red giantd. nebula7. Which of these is a heavy element in a star?a. carbonb. hydrogenc. lithiumd. helium8. Why are spectral lines useful in classifying stars?a. They show the layers that make up a star.b. They show a star's location.c. They indicate a star's age.d. They show the composition of a star.9. Which statement correctly explains how the Hertzsprung-Russell diagram helps to compare stars?a. The Hertzsprung-Russell diagram plots stars according to their luminosity and temperature, which is also associated with spectral class.b. Stars with the highest temperatures appear towards the right side of the Hertzsprung-Russell diagram.c. The Sun's high temperature places it to the far left of the Hertzsprung-Russell diagram.d. The Hertzsprung-Russell diagram plots stars according to their size and shape. Which sentence best compares two things?A. Running on a treadmill, like running outdoors, helps build strengthand stamina.B. Running on a treadmill can help build strength and stamina.C. Running on a treadmill is much easier than running outdoors.D. Running outdoors is much more fun than running on a treadmill. Skylar got a manicure for $28 and pedicure for $35salon. If she plans to tip 15%, how much will she pay? which two of the following are notable achievements of the Maya?developing an extensive road systemcreating a hieroglyphic writing systemInventing an accurate calendar systemestablishing a unifled tribute empirecreating advanced methods of irrigation Find the surface area of number 1. Will give Brainliest why was it hard for European explorers of the 15th and 16th centuries to understand the diversity of the native Americans? plz help me asap will give brainliest and 100 points.3. A new ice cream shop is opening up and the owners are making a large ice cream cone for display (seepicture below). What is the volume of the ice cream cone? Round your answer to the nearest hundredth of acubic inch. Use 3.14 to approximate pi. Show your work and explain your steps. Joe and Angie are studying how listening to music affects grades. Joe listened to music while he studied while Angie studied in silence. After two weeks, they took the same math test and Joe scored higher than Angie. They came to the conclusion that listening to music will improve grades. What comment would you make to Joe and Angie about their experiment?