How is a star color related to its temperature?

Answers

Answer 1

Answer: The color of a star is related to its temperature because a relatively cool star glows red as a very hot one glows bluish - white or even blue.

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An object has a density of 0.755 g/mL. Its volume is 640 mL. What is its mass?

Answers

Answer:Density = 7.5 g/ml (By putting the given values.) [ The ratio of the mass to volume is the density, that's why the unit of the density is also the ratio of the unit of mass to the unit of volume. ] Hence, the density of the object is 7

Explanation: Google

3m/s North is an example of a____

Answers

That's a velocity vector.

A sinusoidal wave travels along a string. The time for a particular point to move from maximum displacement to zero is 0.13 s. What are the (a) period and (b) frequency? (c) The wavelength is 1.9 m; what is the wave speed?

Answers

Answer:

Part a)

T = 0.52 s

Part b)

$f = 1.92 Hz$

Part c)

$speed = 3.65 m/s$

Explanation:

As we know that the particle move from its maximum displacement to its mean position in t = 0.13 s

so total time period of the particle is given as

$T = 4* 0.13 = 0.52 s$

now we have

Part a)

T = time to complete one oscillation

so here it will move to and fro for one complete oscillation

so T = 0.52 s

Part b)

As we know that frequency and time period related to each other as

$f = (1)/(T)$

$f = (1)/(0.52)$

$f = 1.92 Hz$

Part c)

As we know that

wavelength = 1.9 m

frequency = 1.92 Hz

so wave speed is given as

$speed = wavelength * frequency$

$speed = 1.92 * 1.9$

$speed = 3.65 m/s$

What information about an element is most crucial for locating that element in the periodic table?

Answers

the most crucial information would be its atomic number.

In which situation is no work being done?A. No force is applied
B. The force does not result in displacement
C. The force and displacement are perpendicular to each other
D. The force and displacement are in the same direction

Answers

Answer:

Work is said to occur when a force is able to cause displacement of an object in the direction of the applied force. It is given by the scalar product of force and displacement.

W = F.s = F s cos θ

Thus, no work is being done when no force is applied ( ∵ F = 0, W = 0) or the force does not result into displacement (∵ s = 0, F = 0) or when the force and displacement are perpendicular to each other (∵ θ =0, cos θ =0, W =0).

Answer: D. The force and displacement are in the same direction

Explanation: The guy above me is trying to hard to put information into his answer...

Why do deer depend on plants to survive

Answers

Deer depend on plants to survive because they are herbivores. Herbivores are animals that only eats plants and fruits in order to survive. Deer's meal includes grass and evergreen plants. If grass is unavailable, they eat whatever food like fallen leaves, twigs, bushes and other woody plants.

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An explosion occurs 340 km away. Given that sound travels at 340 m/s, the time the sound takes to reach you is a. 1 s. b. 10 s. c. 100 s. d. 200 s. e. more than 200 s.

When a warm air mass and cold air mass come together, like a warm front and cold front, a typical outcome is rain. What explains why rain forms in this situation? A. The cold air causes the moisture in the warm air to condense and precipitate as rain. B. The cold air is moving faster than the warm air, which causes rain. C. Because the cold air is denser, it causes rain. D. The two air masses neutralize each other, which results in clouds that produce rain.

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In which direction should you look to see the setting moon.