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2 years ago

Which kind of star is most likely to spend the longest time on the main sequence?

Physics

2 answers:

s2008m [1.1K]2 years ago

6 0

A, a low-mass red star

zhannawk [14.2K]2 years ago

6 0

Answer: 1. c . Nebula

2. a. low mass red star

3. d. turn into white dwarfs

4. c. 10 billion years

Explanation:

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What is the angular momentum of a 0.25 kg mass rotating on the end of a piece of

finlep [7]

L = r x p = rmv = mr²ω

L = 0.25 x 0.75² x 12.5 = 1.758

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1 year ago

choose the correct anwer 9: the range of the gravitional force is given by A: 10_2m B:10_15m C: infinite D: 10_10m

frosja888 [35]

Answer:

The answer is C

Explanation:

The magnitude of the gravitational force depends inversely on the square of the radial distance between the centers of the two masses. Thus, essentially, the force can only fall to zero, when the denominator that is r becomes infinite.

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2 years ago

A wave with a frequency of 17 Hz has a wavelength of 4 meters. At what speed (in m/s) will this wave travel?

Molodets [167]

Answer:68m/s

Explanation:

Frequency=17Hz

Wavelength=4metre

Wave speed=frequency x wavelength

Wave speed =17 x 4

Wave speed =68m/s

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2 years ago

igor_vitrenko [27]

Answer:

$a=40\ m/s^2$

Explanation:

Given that,

Initial speed of a shuttlecock, u = 30 m/s

Final speed of the shuttlecock, v = 10 m/s

Time, t = 0.5 s

We need to find its average acceleration. The acceleration of an object is equal to the change in speed divided by time taken. It is given by :

$a=\dfrac{v-u}{t}\\\\a=\dfrac{10-30}{0.5}\\\\a=-40\ m/s^2$

So, the average acceleration of badminton shuttlecock is $40\ m/s^2$ .

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2 years ago

Two forces that act on very small distances (smaller than you can see ) are

BlackZzzverrR [31]

There are three fundamental forces that act at a distance. They are gravitational, electromagnetic and nuclear forces.

7 0

2 years ago