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anyanavicka [17]
3 years ago
5

How long does it take for a star the size of the sun to become a red giant?

Physics
1 answer:
Agata [3.3K]3 years ago
8 0
Trillions and trillions of years I think.
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A turntable must spin at 33.4 rpm (3.50 rad/s) to play an old-fashioned vinyl record. how much torque must the motor deliver if
Westkost [7]
In order to compute the torque required, we may apply Newton's second law for circular motion:
Torque = moment of inertia * angular acceleration

For this, we require the angular acceleration, α. We may calculate this using:
α = Δω/Δt
The time taken to achieve rotational speed may be calculated using:
time = 1 revolution * 2π radians per revolution / 3.5 radians per second
time = 1.80 seconds

α = (3.5 - 0) / 1.8
α = 1.94 rad/s²

The moment of inertia of a thin disc is given by:
I = MR²/2
I = (0.21*0.1525²)/2
I = 0.002

τ = 1.94 * 0.002
τ = 0.004

The torque is 0.004
4 0
3 years ago
1. Which of the following is an accurate statement? A. Step-down voltage transformers have a different number of turns in the pr
Snowcat [4.5K]
'C' is the only true statement on the list.

Step-up voltage transformers have a lower number of turns
in the primary than in the secondary winding.

4 0
3 years ago
An X-Ray machine delivers a radiation dose of 5mRem/hr. at 3ft from the machine. How far will the X-Ray technician have to move
kupik [55]

Answer:

4.7ft

Explanation:

Pls see attached file

8 0
3 years ago
Identify the formula for the binary ionic compound, aluminum oxide.​
vesna_86 [32]

Answer:

my bad ion even know what it is i just need sum points

Explanation:

3 0
3 years ago
Read 2 more answers
Ignoring air resistance, if a 20 kg ball and a 400 kg crate were both dropped from the
masya89 [10]
The crate’s acceleration is gravity= 9.81m/s^2
The ball’s acceleration is also gravity=9.81m/s^2


8 0
3 years ago
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