Which of the following is an important property of stars, because it provides some information about the temperature of a star? Group of answer choices The shape of the star The distance to the star The star's color The star's name

Answers

Answer 1

Answer:

The star'scolor is an important property of stars because it provides some information about the temperature of a star. The correct option is C.

What does color of star indicates?

A star'shue depends on its temperature; cooler stars seem red, while hotter stars appear blue or white.

This is due to the fact that although stars emitlight over the full spectrum, the predominant hue in the light that we perceive is the color that corresponds to the star's temperature.

The other stated characteristics, such as a star's name, distance from the star, and shape, have no direct bearing on a star's temperature.

However, these characteristics can also provide crucialdetails about the star, such as its size, brightness, and location in the sky.

Thus, the correct option is C.

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Answer 2

Answer:

The stars color

Explanation:

Scientists know how a Star is by their color like blue is hotter than red

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The soccer game begins with a ______ ______ in the center of the field

Answers

It begins with a kick-off

A curve has a radius of 50 meters and is banked 5 degrees. The road is covered with ice and is frictionless. What is the maximum speed, in mph, a car can travel and negotiate the curve? A.) 15.65mph B.) 25.00mph C.)65.00mph D.) 6.55mph E.) None of the above

Answers

Answer:

E.) None of the above

Explanation:

Draw a free body diagram. There are two forces acting on the car. Normal force perpendicular to the road, and weight downward.

Sum of the forces perpendicular to the road:

∑F = ma

N − mg cos θ = 0

N = mg cos θ

Sum of the forces towards the center of the circle:

∑F = ma

N sin θ = mv²/r

mg cos θ sin θ = mv²/r

g cos θ sin θ = v²/r

v = √(gr cos θ sin θ)

Given r = 50 m and θ = 5°:

v = √(9.8 m/s² × 50 m × cos 5° × sin 5°)

v = 6.52 m/s

v = 14.6 mph

The more ______ an object moves, the more __________ it has (Kinetic Energy)

Answers

Answer:

__________

Explanation:

The slope of the line on a speed-time graph tells the speed.Please select the best answer from the choices provided

T
F

Answers

From the choices provided, the better answer is ' T ' .

7. Alice holds a black belt in Taekwondo and her fist has a mass of 0.5 kg. Her fist obtains a velocity of 5 m/s in 0.1 seconds from rest. Evaluate the average net force applied to the fist.

Answers

Answer: 25 N

Explanation:

the fist hit by the black belt Alice in the Taekwondo has been given to have a mass of 0.5 kg which acquires a velocity of 5 m/s in a time of 0.1 sec, therefore, the average net force which is being applied to the fist can be calculated by the following method,

Given, mass m=0.5 kg, velocity v=5 m/s, time t=0.1 sec

As we know that, acceleration

$a=(v-u)/(t)=(5-0)/(0.1)=50 \mathrm{m} / \mathrm{s}^(2)$