Diego rivera's mural for the lobby of the rca building was destroyed because

Which of these statements is correct about Newton's first law of motion?

nexus9112 [7]

Answer:

Answer D: It describes the relationship between motion and force.

Explanation:

The answer is D because a law is something that describes something in nature, but does not try to explain how or why is occurs (that is a theory). Options B and C sound more like theories, while option A sounds like a definition. Option D is correct because a law describes without explaining.

4 0

3 years ago

Two magnets are held apart. Once released, the South Pole of one magnet moves toward the North Pole of another magnet until the

tresset_1 [31]

Answer:

Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.

Explanation:

easy

6 0

3 years ago

Conductors can be charged by, while insulators cannot.

ikadub [295]

Answer:

Electrons

Explanation:

Conductors can be charged by electrons, while insulators cannot. Insulators inhibit the flow of electrons; conductors allow free flow of electrons.

7 0

3 years ago

Sort the statements based on whether they are correct or incorrect. All waves have the same wavelength. Radio telescopes give us

shutvik [7]

All waves have the same wavelength.

FALSE

All waves may not be of same frequency because all waves are of different energy levels and energy depends on the frequency which is different.

Radio telescopes give us information about the birthplace of a star.

FALSE

Radio telescope is an astronomical instrument consisting of a radio receiver and an antenna system that is used to detect radio-frequency radiation emitted by extraterrestrial sources.

If the wavelength of a wave increases, its frequency also increases.

FALSE

relation between frequency and wavelength is given as

$\nu = \frac{c}{\lambda}$

so they are inversely related to each other and hence if wavelength is increased then frequency must have to decrease.

Visible light is a kind of electromagnetic wave.

TRUE

All visible light is a part of electromagnetic waves.

All objects emit electromagnetic waves.

TRUE

Due to thermal vibrations all objects radiate electromagnetic waves of different frequencies.

6 0

3 years ago

Read 2 more answers

A man driving a car traveling at 20 m/sec slams on the brakes and decelerates at 3.25

zhuklara [117]

Recall that

${v_f}^2-{v_i}^2=2a\Delta x$

where $v_i$ and $v_f$ are initial and final velocities, respectively; $a$ is acceleration; and $\Delta x$ is the net displacement, or distance if the object is moving in a single direction.

The car has initial speed 20 m/s and acceleration -3.25 m/s². It comes to a stop, so it has 0 final speed. Then

0² - (20 m/s)² = 2 (-3.25 m/s²) ∆<em>x</em>

∆<em>x</em> = (20 m/s)² / (7.5 m/s²) ≈ 53.3 m

8 0

3 years ago