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3 years ago

The white dwarf that remains when our sun dies will be mostly made of

Physics

1 answer:

expeople1 [14]3 years ago

7 0

Answer:

Carbon and oxygen

Explanation:

White dwarfs are the stars which have used all their hydrogen and helium fuel and now exists with only carbon and oxygen in their core. Their size reduces up to one hundredth times of the size of their sun in early stages and yet they possess the same mass.

Due to loss of fuels and impact of gravity, a young star collapses on itself leading to formation of dwarf star.

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A force acts on an object. Which option describes an action that could prevent the object from moving? (1 point)

hram777 [196]

C. because if you push a ball on one side and on the other side with the same amount of force at the same time it won’t move.
Hope this helps

8 0

3 years ago

b. A string is wrapped around a pulley of radius 0.05 m and moment of inertia 0.2 kg  m2. If the string is pulled with a force

Oduvanchick [21]

Answer:

f = 8 N

Explanation:

Data provided in the question

Radius of the pulley = r = 0.05 m

Moment of inertia = (I) = 0.2 kg.m^{2}

Angular acceleration = ∝ = 2 rad/sec

Based on the above information

As we know that

Torque is

$= force \times radius$

$= f \times r$

And,

Torque is also

$= moment\ of\ inertia \times angular\ acceleration$

$= I \times \alpha$

So,

We can say that

$f \times r = I \times \alpha$

$f \times 0.05 = 0.2 \times 2$

0.05f = 0.4

f = 8 N

We simply applied the above formulas

8 0

4 years ago

With a quarter-turn flick of the wrist, a student sets the frisbee rotating at 570 rpm . what is the magnitude of the torque, as

Sunny_sXe [5.5K]

Torque: $\tau = \overrightarrow r \times \overrightarrow F = rFsin\theta = I\alpha$

6 0

3 years ago

A source emits a sound and is represented by the red dot in this map. Four people are located around the source, and the circles

xenn [34]

Answer:

Explanation:

When a sound is produced by a stationary point source , moving waves are produced around it in circles consisting of compression and rarefaction . These compression and rarefaction are mutually equidistant. But when the source moves in a particular direction , waves get compressed in that direction . If in a distance of V , n number of waves are formed , in case of moving source , same no of waves will lie in V - v distance in the direction of motion. . Here V is velocity of sound , v is velocity of source and n is no of waves being produced per second. So we see that distance between two consecutive waves becomes smaller . Or , waves get compressed . In this region frequency becomes greater.

A is standing left of source and source is moving towards left , hence A. will hear highest pitch or greatest frequency.

4 0

3 years ago

The capacitor in the figure (Figure 1) is initially uncharged. The switch is closed at t=0.

fomenos

Immediately after the switch is closed, the capacitor acts like a short circuit for a very small time. We can calculate the currents through each resistor by first calculating the total resistance:

Req = 1/(1/3+1/6) + 8 = 1/(3/6) + 8 = 2 + 8 = 10 ohms.
IR1 = E / Req = 42 / 10 = 4.2 A.
VR2 = VR3 = E * R23 / Req = 42 * 2 / 10 = 8.4 V
IR2 = VR2 / R2 = 8.4 / 6 = 1.4 A.
IR3 = VR3 / R3 = 8.4 / 3 = 2.8 A.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

3 0

3 years ago