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3 years ago

Question 1: Explain how stars are formed.

Physics

1 answer:

iris [78.8K]3 years ago

5 0

Star formation begins when the denser parts of the cloud core collapse under their own weight/gravity.

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A 9-volt battery is used to power two lightbulbs in a series circuit. The first light bulb has a

butalik [34]

Explanation:

Total Resistance: 3+2 = 5 ohms

V=9V

Power = V²/R

=9²/5

=81/5

=16.2 W

6 0

2 years ago

a tire rolls from rest to an angular velocity of 6 radians per second. the angle it turns through is 12 radians. what is the ang

True [87]

Answer:

$\alpha =1.5\ rad/s^2$

Explanation:

Given that,

Initial angular velocity, $\omega_i=0$

Final angular speed, $\omega_f=6\ rad/s$

Angular displacement, $\theta=12\ rad$

We need to find the angular acceleration of the tire. We can find it using the third equation of rotational kinematics. So,

$\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{6^2-0^2}{2\times 12}\\\\\alpha =1.5\ rad/s^2$

So, the angular acceleration of the tire is equal to $1.5\ rad/s^2$ .

7 0

3 years ago

Assume your sampling frequency (fs) is 500 Hz. If you want to capture the 50Hz signal for 5 seconds, calculate the number of sam

belka [17]

Answer:

N = 2500

Explanation:

By definition, the sampling frequency (fs) is:

$f_{s} = N / T$

<em>where N: is the number of samples and T: is the time</em>

Hence, the number of samples at the sampling frequency, 500 Hz, to get 5 seconds of data is:

$N = f_{s} \cdot T = 500 s^{-1} \cdot 5 s = 2500$

I hope it helps you!

3 0

4 years ago

As the car moves from point A , to point B, and finally to point C, the total energy of the car

Minchanka [31]

Answer: C

Explanation:

Energy stays the same, but there’s more kinetic energy the less it moves and mor kinetic energy the more it moves

3 0

3 years ago

You're in an airplane that flies horizontally with speed 1100 km/h (300 m/s ) when an engine falls off. Neglecting air resistanc

Tcecarenko [31]

Answer:

The height of the airplane is 3312.4 meters.

Explanation:

Given that,

Speed of the airplane, v = 1100 km/h = 300 m/s

It takes 26 s for the engine to hit the ground. We need to find the height of the airplane. Using second equation of motion to find it as :

$h=ut+\dfrac{1}{2}at^2$

Here, u = 0 and a = g

$h=\dfrac{1}{2}gt^2\\\\h=\dfrac{1}{2}\times 9.8\times (26)^2\\\\h=3312.4\ m$

The height of the airplane is 3312.4 meters.

5 0

4 years ago

Question 1: Explain how stars are formed.​

Question 1: Explain how stars are formed.