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1 year ago

If a star is found directly above the sun on the h-r diagram, what can you conclude about its size?.

Physics

1 answer:

hammer [34]1 year ago

7 0

Answer:

It is larger than the Sun.

Explanation:

Brainliest pls

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During the fission reaction shown, how did the target nucleus change ?

Zarrin [17]

Answer:

A. The target nucleus split into two nuclei, each with fewer nucleons than the original.

Explanation:

5 0

2 years ago

A gymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular v

kifflom [539]

Here we will say that there is no external torque on the system so we will have

$L_i = L_f$

here we know that

$L_i = I_1\omega_1$

where we know that

$I_1 = \frac{2}{5}mr^2$

Also we know that

$I_2 = \frac{1}{12}mL^2$

initial angular speed will be

$\omega_1 = 2\pi(2rev/s) = 4\pi rad/s$

now from above equation

$\frac{2}{5}mr^2 (4\pi) = \frac{1}{12}mL^2 \omega$

$0.4(0.3)^2(4\pi) = \frac{1}{12}(1.5)^2\omega$

$0.452 = 0.1875 \omega$

now we have

$\omega = 2.41 rad/s$

so final speed will be 2.41 rad/s

6 0

2 years ago

The forces exerted on an object are shown. (3 points)

Alex_Xolod [135]

Answer:

<em>F equals 3 N and the object remains stationary</em>. (second option in the list)

Explanation:

For sure to cancel acting forces, F must be 3N pointing up. But with regards to the object stationary or not, the question is tricky. We could have a ZERO net force applied, and the object moving at constant speed, which could still verify Newton's Laws. But considering the first answer option that refers to vertical motion upward where the object could be gaining potential energy, the most accurate response is that the force F has to be 3 N pointing up to make the object in equilibrium, and no motion in the vertical axis.

7 0

2 years ago

13. A 50 kg cart is attached to a 75 kg donkey. Two men, each using 100 N of force, try to pull the

Arturiano [62]

F1=-100N
F2=500N

$\\ \sf\longmapsto F_{net}=F_1+F_2$

$\\ \sf\longmapsto F_{net}=-100+500$

$\\ \sf\longmapsto F_{net}=400N$

7 0

2 years ago

Which device is designed to convert chemical energy into kinetic energy ?

irakobra [83]

Answer:

A.C. Generator

Explanation:

The device designed to convert chemical energy into kinetic energy is an A.C generator.

The generator uses fuel to cause the mechanical motion of the pistons in the device.

Chemical energy is a form of energy found between the bonds of compounds and molecules.
When the bonds are broken, energy is released.
The heat energy produced drives pistons and cause mechanical motion of the body.
This is a form of kinetic energy which causes the motion of a body.

7 0

2 years ago