Hydrogen fusion in the Sun requires a temperature (in Kelvin) of Group of answer choices any temperature, as long as gravity is strong enough. millions of degrees. billions of degrees. thousands of degrees.

Answers

Answer 1

Any temperature, as long as gravity is strong enough, may cause hydrogen fusion in the Sun, which requires a temperature of millions of degrees. Option A is correct.

What is the helium fusion process?

When the temperature in the core hits around 100 million degrees, the helium will begin to fuse into carbon in a mechanism known as the triple-alpha process

Any temperature may result in hydrogen fusion in the Sun, which needs a temperature of millions of degrees, as long as gravity is strong enough.

Hence option A is correct.

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Related Questions

Which two changes would decrease the electric force between two charged particles? A. Decrease the charge of one of the particles. B. Increase the charge of one of the particles. C. Increase the distance between the particles. D. Decrease the distance between the particles. E. Increase the charge of both particles. Which two changes would decrease the electric force between two charged particles ? A. Decrease the charge of one of the particles . B. Increase the charge of one of the particles . C. Increase the distance between the particles . D. Decrease the distance between the particles . E. Increase the charge of both particles .​

Answers

Answer:

A   C

Explanation:

F = C q1q2/r^2    means that decreasing the charge (s) or increasing distance will decrease force

A  C


Which vector shows the velocity of the yo-yo at this moment?

Answers

The vector which shows the velocity of the yo-yo at this moment is A and is denoted as option A.

What is Velocity?

This is referred to the rate of change of distance with time and the unit is metre per seconds.

A shows the direction of motion is same as the direction of velocity and is the tangent at that particular point hence why it was chosen as the most appropriate choice.

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What does it mean for the forces acting on an object to be balanced?

Answers

When the forces are said to be balance, it means that net force is zero.

What is Net force?

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

The resultant of all the forces in horizontal and vertical direction is zero, when the forces are balanced.

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look at picture below !! please <3

Answers

Answer:

C

Explanation:

compound is a substance made from two or more different elements that have been chemically joined

as the mass of the central star increases, the distance to the habitable zone __________ and the size (width) of the habitable zone __________.

Answers

As the mass of the central star increases, the distance to the habitable zone increases and the size (width) of the habitable zone increases.

How the does the size and mass of a star affect its habitable zone?

A star is a large luminous object found in space which produces heat and light energy as well as electromagnetic radiation.

The habitable zone of a star is the zone or area where liquid water can be found.

The distance habitable zone of a star increases with increase in mass of the star.

Therefore, as the mass of the central star increases, the distance to the habitable zone increases and the size (width) of the habitable zone increases.

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What is the resultant of the two vectors shown?

Answers

Explanation:

The correct is (c). cuz, the tail of A and the tip of B will join

Electric Resistance measured in?

Answers

Answer:

ohms

Explanation:

because it deal with circuit

Electric resistance is measured in Ohms.

What is an Electric resistance?

A electric resistance can be defined as the opposition to current flow in a conductor.

From ohms law, an electric resistance can be determined using the formula below.

Formula:

V = IR.............. Equation 1

Where:

V = VoltageI = CurrentR =  Electric resistance

Also,

V  is measured in VoltsI is measured in AmpereR is measured in Ohms.

Hence, Electric resistance is measured in Ohms.

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An arrow is shot horizontally from the top of a building and it lands 200m from the foot of the building after 10s. assuming air resistance is negligible, calculate the initial velocity of the arrow, find also the height of the building

Answers

The initial velocity and the height of this building are 29 m/s and 780 meters respectively.

How to calculate the initial velocity?

In order to calculate the initial velocity, we would apply the second equation of motion:

S = ut - ½at²

200 = u10 - ½(9.8 × 10²)

200 = u10 - 490

u10 = 490 - 200

u10 = 290

u = 290/10

Initial velocity, u = 29 m/s.

Next, we would determine the height of the building:

H = ut + ½at²

H = 29(10) + ½(9.8 × 10²)

H = 290 + 490

Height, H = 780 meters.

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Which of the following would increase the amount of electricity generated by a wind turbine

Answers

Higher wind speeds would increase the amount of electricity generated by a wind turbine.

What is a power plant?

A power plant is an industrial structure that generates electricity. The majority of power plants are linked to the electrical grid.

Stronger winds produce greater power because they enable the blades to revolve more quickly. Greater mechanical and electrical power from the generator result from faster spinning.

Hence, higher wind speeds would increase the amount of electricity generated by a wind turbine.

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What's the difference between the speed and velocity of an object?

question 1 options:

speed refers to the distance an object travels over time, whereas velocity represents the speed only at a given moment.


speed refers to the distance the object travels only, whereas velocity accounts for the acceleration of the object.


speed refers to the distance an object travels per unit of time only, whereas velocity also indicates the direction of travel.


speed accounts for the distance traveled and the direction, whereas velocity considers only the distance traveled per unit of time.

Answers

Answer:

C

Explanation:

velocity is a vector unit, meaning it isn't scalar so also gives direction, same as distance vs. displacement.

C is the correct answer


A firework with a mass of 1.5 kg shoots up into the air with a velocity of 25 m/s. It then explodes. Use this information to work out the total momentum of all the pieces after the firework explodes

Answers

Answer:

37.5 kg⋅m/s

Explanation:

p = mv

p = (1.5)(25) = 37.5 kg⋅m/s

Momentum is conserved in all collisions and explosions!

Trivia Time!! At what velocity does light move?

Answers

Explanation:

Light Light from a moving source travels at 300,000 km/sec (186,000 miles/sec).

Note:

The Speed of Light Is Constant.

Explanation:

LIGHT TRAVELS AT A CONSTANT VELOCITY OF 300,000 km/sec.

two conducting spheres ​

Answers

Answer:

[tex]\fbox {F: +3C, G: +3C}[/tex]

Explanation:

When two conducting spheres come in contact, their charges will become the mean of their charges. This takes place by the transfer of charges from the greater charged sphere to the lesser charged one.

Then :

⇒ F + G / 2

⇒ -14 + 20 / 2

⇒ 6/2

3C

∴ Hence, both sphere F and sphere G will have a charge of +3 C.

My predicted height was lower than the final height i measured. this is because friction slowed the puck as it was sliding along the track. do you agree or disagree with khadija

Answers

I disagree since friction will cause the ultimate height to be lower than what was anticipated. To reduce the height, resist the action.

What is the height?

The vertical distance between an object's top and the bottom is defined as its height.

It is measured in centimeters, inches, meters, and other units. The height of the cliff is obtained by the Newton equation of motion.

My actual height was less than what I had anticipated. this is because the puck's movement along the track was impeded by friction.

To the Khalida, I object. Disagree, since friction will cause the ultimate height to be lower than the anticipated height. To reduce the height, resist the action.

Hence, I disagree with Khalida.

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how many wavelengths are represented​

Answers

Answer:

two wavelength are present

as wavelength is counted either from crest to crest or trough to trough and there are only 2

When in contact with hydrochloric acid, which mineral gives off bubbles of carbon dioxide gas?.

Answers

Answer:

calcite

Explanation:

A car accelerates at a rate of 8.8 m/s² with a force from the tires of 15,840 N.
What is the mass of the car?

Answers

Answer:

1,800kg

Explanation:

Force = Mass x Acceleration

F = m x a

15840N = m x 8.8

8.8 x m = 15840

m = 15840/8.8

= 1,800kg

Answer:

[tex]\displaystyle 1800\:kg.[/tex]

Explanation:

[tex]\displaystyle am = F_{net} \\ \\ \frac{15840}{8,8} = \frac{8,8m}{8,8} \\ \\ \boxed{1800 = m}[/tex]

I am joyous to assist you at any time.

Analyze the relationship between total internal reflection and the critical angle.

Answers

Answer:

5.15 when the angle of incidence is equal to critical angle the angle of reflection is equal to 90 if the angle of incidence is bigger than the critical anger the reflected ray will not emerge from the medium but will be reflected back into the medium this is called total internet reflection

Explanation:

hope it's helpful

Objects A and B have been projected from the same point at angles 30° and 60° with the ground, respectively. If both objects
reach the same height what is the ratio of their velocities Va and Vb

A). 3:1
B). 2:1
C). 1:1
D). 2:1

Answers

If both objects reach the same height, the ratio of their velocities Va and Vb is 3:1. The correct option is A.

What is projectile?

When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.

Objects A and B have been projected from the same point at angles 30° and 60° with the ground, respectively. If both objects reach the same height.

The maximum height of the objects A and B are same, so

H = Va² sin²30 / 2g =  Vb² sin²60 / 2g

Va²/Vb² = sin²60/ sin²30

Va/Vb = 3:1

Thus, the correct option is A.

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Siobhan wants to measure the mass of the bag of flour.what should she do?

Answers

Answer:

Weight it in beam balance or any other weight mesuring device

A 10 kg ball Is released from the top of the hill how fast is the ball going when it reaches the base of the hill

Answers

The velocity of the ball going when it reaches the base of the hill will be 5.5 m/sec.

What is velocity?

The change of distance concerning time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.

The complete question is;

A 10 kg ball is released from the top of a hill. How fast is the ball going when it reaches the base of the hill? Approximate g as 10 m/s2 and round the answer to the nearest tenth.

hy = 2 m

h = 0.5 m

The given data in the problem is

m is the mass of block =  10 Kg

u is the initial velocity of fall = 0 m/sec

h is the distance of fall =  2.5 m

g is the acceleration of free fall =10 m/sec²

v is the hitting velocity of =?

According to Newton's third equation of motion;

[tex]\rm v^2=u^2+2g(h_2-h_1) \\\\ \rm v^2=0+2g(h_2-h_1) \\\\ v = \sqrt{2g(h_2-h_1)}\\\\ v = \sqrt{2 \times 9.81 \times (2-0.5)|}\\\\ v =\sqrt{2 \times 9.81 \times 1.5 } \\\\ v = 5.5 \ m/sec[/tex]

Hence, the velocity of the ball going when it reaches the base of the hill will be 5.5 m/sec.

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You should switch your headlights from high beam to low beam when a vehicle approaching from the opposite direction gets no closer than____ feet away from you.

Answers

You should switch your headlights from high beam to low beam when a vehicle approaching from the opposite direction gets no closer than 492.126 feet away from you.

What is a low beam?

Low beams, often known as dipped beams have a close-range focus. The most crucial and commonly utilized beam in an automobile is the low beam.

When a car coming from the other direction is no closer than 492.126 feet away from you, you should lower your headlights from high to low beam.

Hence, a vehicle approaching from the opposite direction gets no closer than 492.126 feet away from you.

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someone help real quick please
On one run along a measured distance of 200 m, the bicycle's speed is 40 m/s.
(a) Calculate the time taken by the bicycle to travel this distance.
(b) State the formula you use and show your working.​

Answers

Answer:

5 sec

Explanation:

The formula for speed is distance/time taken. so if we use cross multiplication we get distance = speed x time taken. And to get rid of speed we divide both equations by speed like this distance = speed x time taken

speed speed

We cancel out speed by speed and we get this formula to calculate time.

time taken = distance

speed

Now we got the formula we need so we substitute them by their values.

time taken = 200m

40m/s

We cancel meter by meter and divide 200 by 40 and the answer will be 5 seconds. please give me like, thank me and make my answer the brainliest.

give two reasons why carbon brushes and commutators are made of graphite?​

Answers

Answer:

Graphite is a good conductor of electricity

it allows easy shift of current between the comm

Explanation:

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. How long will the ball be in the air before it lands? Round your answer to the nearest tenth.


s




How far will the football travel before it lands? Round your answer to the nearest tenth.


m

Answers

Answer:

See below

Explanation:

vertical velocity=13.9 sin 25

When it hits the ground  y = 0

0 = vo t - 1/2 a t^2

0    =  13.9 sin 25  t   - 1/2 (9.81)t^2  

0 = 13.9 sin 25 - 1/2 (9.81) t        shows t = 1.1976  ~ 1.2 sec

horizontal speed x time = distance

13.9 cos 25   x   1.1976 =15 .1 meters    

What observation method exposes people to frustrations, temptations, pressure, and boredom in a controlled environment, and is used for firearms training in police departments?

Answers

Virtual reality is the observation method that exposes people to frustrations, temptations, pressure, and boredom in a controlled environment, and is used for firearms training in police departments.

What is virtual reality?

Virtual reality is an observation technique that is utilized in police agencies for weapons training. It exposes individuals to frustrations, temptations, pressure, and boredom in a controlled setting.

Police officers' psychophysiological reactions are impacted when participating in virtual reality weapons training exercises.

Electroencephalographic (EEG) and heart rate variability (HRV) measurements, as well as VR simulator performance metrics, are used as outcome measures.

In order to facilitate the design of a biocybernetic adaption layer that generates real-time modulations in simulation difficulty based on specific physiological responses, we propose a psychophysiological model.

Hence, virtual reality is the observation method that exposes people.

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A car accelerates from a standstill to 60 km/hr in 10.0 seconds. What is its acceleration?

Answers

The acceleration of the car is 1.66 m per sec square.

How to calculate acceleration?

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is accelerating.

Initial velocity=0

Final velocity= 60km/hr

To convert it into m/sec

1 km=1000 m

1 hr=3600 sec

So= (60×1000)÷3600=16.66 m/sec

time=10 sec

We know that acceleration is the rate of change of velocity per unit of time.

acceleration=(final velocity-initial velocity)÷ time taken

                     = (16.66-0)÷10

                     = 1.66 m per sec square

So, Acceleration will be, 1.66 m per sec square

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A hiker travels 12 km in a direction of 50 degrees west of north. What are the north and west components of this displacement?

Answers

The north and west components of this displacement are 9.19 km and -7.71 km respectively.

North component of the displacement

The north component of the displacement is calculated as follows;

Dy = D sinθ

Dy = 12 km x sin50

Dy = 9.19 km

West component of the displacement

Dx = D x cosθ

Dx = - 12 km x cos(50)

Dx = -7.71 km

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Average speed equals distance divided by time. on a journey to the
alpha centauri star system, a space probe travels a distance of
meters in 1.73x10 10 seconds. (a) find its average speed in
meters per second. (b) how long did the journey take in years? use
365.24 days per year.
4.12x1016
2e-12%

Answers

The average speed will be 2.38×10⁶ m/sec.The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.

What is the average speed?

The total distance traveled by an object divided by the total time taken is the average speed.

The speed calculated at any particular instant of time is known as the instantaneous speed.

Given data;

Distance travelled = 4.12x10¹⁶ meter

Time period= 1.73x10¹⁰ sec

The average speed is found as

[tex]\rm V_{avg}= \frac{d}{t} \\\\\ \rm V_{avg}= \frac{4.12 \times 10^{16}}{1.73 \times 10^{10} } \\\\\ V_{avg}=2.38 \times 10^6 \ m/sec[/tex]

Hence, the average speed will be 2.38×10⁶ m/sec.

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How many electrons or protons are found in: a). +1 C of charge? b). -1 C of charge? c. -1.6 x 10^-6 C of charge? a)

Answers

Answer:

50 charges

Explanation:

it will deduct and mutiple it self and divide

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