Help?? When vibrational motion in an object increases, which is a true statement? A.
Kinetic energy and temperature decrease; thermal energy increases.

B.
Kinetic energy, temperature, and thermal energy decrease.

C.
Kinetic energy and temperature increase; thermal energy decreases.

D.
Kinetic energy, temperature, and thermal energy increase.

i think its D, but im not sure.

Answers

Answer 1

Answer: The answer should be "D", Because the vibration would heat up the object causeing the temperature and thermal energy to increase. Since the object is moving (Vibration), then it is using kinetic energy, so that also increases.

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Two planets of the same mass are observed.Which of the following distances between the two planets would result in the least gravitational attraction?

A. 90 light years
B. 80 light years
C. 60 light years
D. 50 light years

Answers

It really doesn't matter what mass the planets have, or whether they're equal, or whether they're planets. The farther apart two objects are, the less gravitational attraction there is between them.

As the distance increases, the gravitational force between them decreases.
So, the option with the largest distance is (A) 90 light yrs. And that's the answer !!

two objects were lifted by a machine. one object had a mass of 2 kilograms and was lifted at the speed of 2 m/s. the other had a mass of 4 kilograms and was lifted at a rate of 3 m/s. which object had more kinetic energy while it was being lifted?"

Answers

to find the kinetic energy KE=1/2 × mass × velocity ^2
for object 1 ke= 1/2(2)(2^2)=4 J
for object 2 ke= 1/2(4)(3^2)=18J
meaning object 2 as more kinetic energy

Identify and explain the three different ways that charge is built up on an object.

Answers

Answer:

There are three ways to charge an object: friction, conduction and induction. Friction involves rubbing on material with another, resulting in electrons moving from one surface to another. ... Friction is useful for charging insulators, which are materials that aren't good conductors.

Explanation:

Sound: The more _______ a sound has, the _________ its volume is.

Answers

First answer: vibrations Second: louder

A wave's frequency is 2Hz and its wavelength is 4 m. What is the wave's speed?

Answers

Wave speed = (wavelength) x (frequency)

= (4 m) x (2 /sec)

= 8 m/sec

Final answer:

The speed of a wave is calculated by multiplying the frequency by the wavelength. For a wave with a frequency of 2Hz and a wavelength of 4m, the speed is 8m/s.

Explanation:

The subject of your question is Physics, specifically the behavior of waves. The speed of a wave can be calculated using the equation speed = frequency ×wavelength. Given that the frequency of your wave is 2Hz (hertz) and the wavelength is 4m (meters), we substitute these values into our equation.

Thus, the speed of the wave is 2Hz × 4m = 8 m/s. Therefore, the wave is moving at a speed of 8 meters per second.

Learn more about Wave Speed here:

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How are electromagnets made and how do they work?

Answers

Electromagnets

When an electric current flows in a wire, it creates a magnetic field around the wire. This effect can be used to make an electromagnet. A simple electromagnet comprises a length of wire turned into a coil and connected to a battery or power supply.

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