Which of the following describes what all electromagnetic waves have in common?

Why does Newton's law of universal gravitation apply to all objects in the universe? Explain

SCORPION-xisa [38]

Because all objects attract in proportion to the product of their masses.Gravitational interactions exist between all objects with an intensity that is directly proportional to the product of their masses.

3 0

3 years ago

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ANSWER THIS FOR 16 POINTS!!!!!!!!!!

Vlad [161]

Answer:

As the ski jumper starts moving downhill, some of his potential energy changes into kinetic energy (KE). Kinetic energy moves him down the slope to the ramp. When the ski jumper takes off from the ramp, some of his kinetic energy is changed back into potential energy as he rises in the air.

Explanation: hope this helps

4 0

3 years ago

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You have a 40-Hz sound wave and a 5,000-Hz sound wave. Both are traveling

Westkost [7]

Answer:

Both sound waves will travel at the same speed.

Explanation:

The speed of sound depends only on the density and the elastic properties of the medium it is travelling through, the mathematical relation is

$v= \sqrt{\dfrac{B}{\rho} }$ ,

where $B$ is the bulk modulus<em> (a measure of how much a material will compress under a certain pressure)</em>, and $\rho$ is the density of the medium.

Since the frequency of a sound wave does not change the properties of the medium it is travelling through, every frequency will have the same speed through a certain medium.

Hence, a 5,000 Hz and a 40-Hz sound wave will have the same speed through steel.

4 0

4 years ago

You wish to make a simple amusement park ride in which a steel-wheeled roller-coaster car travels down one long slope, where rol

Crazy boy [7]

Answer:

(a) The car is going approximately 40.43 m/s at the bottom of the hill

(b) The thermal energy will increase by 607,268.76 J

Explanation:

In the question, we have;

The height of the roller coaster above ground = 83.4 m

The mass of the roller coaster, m = 743.0 kg

(a) By the conservation of energy principle, we have;

The potential energy at the top of the hill, P.E., is equal to the kinetic energy at the bottom of the hill, K.E.

∴ P.E. = K.E.

P.E. = m·g·h

Where;

m = The mass of the roller coaster = 743.0 kg

g = The acceleration due to gravity = 9.8 m/s²

h = The height of the roller coaster = 83.4 m

Therefore, we have;

P.E. = 743.0 kg × 9.8 m/s² × 83.4 m = 607,268.76 J

P.E. = 607,268.76 J

K.E. = 1/2·m·v²

∴ K.E. = 1/2 × 743.0 kg × v²

P.E. = K.E.

∴ P.E. = K.E. = 607,268.76 J

1/2 × 743.0 kg × v² = 607,268.76 J

v² = 607,268.76 J/(1/2 × 743.0 kg) = 1,634.64 m²/s²

v = √(1,634.64 m²/s²) ≈ 40.43 m/s

(b) Given that the material wheel moves along polystyrene track, the sound released will be minimal and almost all the kinetic energy will be converted to heat energy when the train stops, therefore, the thermal energy will increase by K.E. = 607,268.76 J

7 0

3 years ago

A botanist is measuring plants to determine amount of growth after fertilizer was used. A ruler was used for the measurements. W

Gemiola [76]

Answer:

Hi there!

Your answer is:

A. Linear

Explanation:

Linear measurement is when you measure things in a straight line using tools such as a ruler, yardstick or tape measure. To measure height, they are using a ruler, which is a form of linear measurement!

I hope this helps!

7 0

3 years ago