Barycenter can be described as?? A) the center of a celestial object
B) the point between 2 objects that is in the exact center
3) the point between 2 objects where they balance each other

Answers

Answer 1

Answer:

Answer: 3) the point between 2 objects where they balance each other

Explanation:

The center of mass of two bodies about which the bodies orbit and balance each other is known as Barycenter. It is the point of balance of two or more celestial bodies. The Barycenter determines the orbit of the celestial bodies.

For example: the binary stars orbit a common center of mass. Pluto and its moon Charon revolve about their Barycenter.

Hence, the correct option is 3.

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A train is accelerating at a rate of 2 km/hr/s. If its initial velocity is 20 km/hr, what is its velocity after 30 seconds?

Answers

"2 km/hr/s" means that in each second, its engines can increase its speed by 2 km/hr.

If it keeps doing that for 30 seconds, its speed has increased by 60 km/hr.

On top of the initial speed of 20 km/hr, that's 80 km/hr at the end of the 30 seconds.

This whole discussion is of speed, not velocity. Surely, in high school physics,
you've learned the difference by now. There's no information in the question that
says anything about the train's direction, and it was wrong to mention velocity in
the question. This whole thing could have been taking place on a curved section
of track. If that were the case, it would have taken a team of ace engineers, cranking
their Curtas, to describe what was happening to the velocity. Better to just stick with
speed.

Which of the following contains the most thermal energy?a. a cup of hot water
b. a cup of cold water
c. a hot tub full of hot water
d. a large bucket of hot water

Answers

the answer would be c.

Which of the following is not an example of work?A. raising a barbell over your head

B. picking up a box off the floor

C. holding a tray in the cafeteria line

D. pushing a box across the floor

Answers

The following which is not an example of work is C. holding a tray in the cafeteria line because if force displaces an object it should work. I think it's clear and I am pretty sure this answer will help you.

Asteroids are larger than

Answers

Asteroids are larger than comets, you, me, and meteoroids.

asteroids are larger than a house, a molecule, a car, a fish, an Iphone, and etc...

If a wave has a frequency of 2 Hz. what is the period

Answers

The period is the reciprocal of the frequency ... ' 1 ' divided by it.

P = 1/f = 1 / (2 per second) = 1/2 second

Which of the following is NOT true? a. The higher the moment of inertia, the greater the resistance to changes in angular velocity. b. The higher the moment of inertia, the slower something will roll down an incline. c. The lower the moment of inertia, the easier it is to change the angular velocity. d. The lower the moment of inertia, the slower something will roll down an incline.

Answers

Answer:

Explanation:

The moment of inertia is the integral of the product of the squared distance by the mass differential. Is the mass equivalent in the rotational motion

a) True. When the moment of inertia is increased, more force is needed to reach acceleration, so it is more difficult to change the angular velocity that depends proportionally on the acceleration

b) True. The moment of inertia is part of the kinetic energy, which is composed of a linear and an angular part. Therefore, when applying the energy conservation theorem, the potential energy is transformed into kinetic energy, the rotational part increases with the moment of inertia, so there is less energy left for the linear part and consequently it falls slower

c) True. The moment of inertial proportional to the angular acceleration, when the acceleration decreases as well. Therefore, a smaller force can achieve the value of acceleration and the change in angular velocity. Consequently, less force is needed is easier

Final answer:

d. The lower the moment of inertia, the slower something will roll down an incline - this is the option that is NOT true. Objects with lower moments of inertia roll down inclines faster, not slower because they resist changes to their rotation less.

The correct statement that is NOT true among the provided options is: d.

Explanation:

The correct statement that is NOT true among the provided options is: d. The lower the moment of inertia, the slower something will roll down an incline.

The moment of inertia, often denoted by 'I', is essentially the rotational equivalent of mass for linear motion. It is a property of a body that measures its resistance to angular acceleration, which is its change in angular velocity.

a. True - The higher the moment of inertia, the greater the resistance to changes in angular velocity, because a body with a larger moment of inertia (mass concentrated farther from the axis of rotation) requires more torque to change its rotational speed.
b. True - The higher the moment of inertia, the slower something will roll down an incline. This is because an object with a greater moment of inertia will resist rolling down the incline more than one with a lower moment of inertia.
c. True - The lower the moment of inertia, the easier it is to change the angular velocity, as there is less mass resisting the change in rotation.

However, the claim in statement d is not correct as per the principles of rotational motion in physics. An object with a lower moment of inertia would actually roll down an incline faster, not slower, given the same amount of gravitational potential energy, since it has less resistance to changes in its rotational motion.