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4 years ago

15

The model that describes a Sun-centered solar system is called theA.laws of motion.B.geocentric model.C.heliocentric model.D.gen

eral theory of relativity.

1 answer:

artcher [175]4 years ago

7 0

The answer is C the heliocentric model.

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Look at the two wave diagrams. Which best describes the difference between wave A and wave B? Wave A has a greater pitch and fre

stealth61 [152]

Answer:

Correct answer is Wave A has a greater pitch and frequency

Explanation:

To understand the given figure, we should know the definition of wavelength, frequency and pitch

Wavelength

wavelength is defined as distance between two successive wave crests or troughs.

Frequency

Frequency is defined as the number of waves which passes through a given point per second. SI unit of frequency is Hertz.

Pitch

our ear understand the frequency of a sound wave as pitch. A a lower frequency sound has a lower pitch and a higher frequency sound has a higher pitch.

In given figure Wave A has lower wavelength and higher frequency so it have higher pitch than wave B.

4 0

4 years ago

Read 2 more answers

||||| A ball on a porch rolls 60 cm to the porch’s edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm

3241004551 [841]

Answer:

$d = 145.6 cm$

Explanation:

first ball rolls on the porch by total distance

$x_1 = 60 cm$

Then again it will move on horizontal floor

$x_2 = 80 cm$

also in vertical direction it will drop down

$y = 40 cm$

so we have

$x = 60 + 80$

$x = 140 cm$

$y = 40 cm$

so magnitude of net displacement of the ball is given as

$d = \sqrt{140^2 + 40^2}$

$d = 145.6 cm$

8 0

3 years ago

what is the driver doing when they are holding their foot over top of the accelerator but not touching it?

notka56 [123]

Hovering their foot over the gas petal.

8 0

2 years ago

Heat is transferred from your body into an ice cube by

Dima020 [189]

2.) <span>Heat is transferred from your body into an ice cube by "Conduction"

3.) </span><span>The loudness of a sound will be determined by the wave’s "Frequency"

4.) </span>The speed of a sound wave <span>"is slower than an electromagnetic wave"

Hope this helps!
</span>

3 0

3 years ago

A 0.30 kg softball has a velocity of 15 m/s at an angle of 35 degrees below the horizontal just before making contact with the b

jarptica [38.1K]

Answer:

a) 5.03 kg m/s

b) 10.03 kg m/s

Explanation:

Hi!

Let us consider the origin of coordinates at the pitcher, and pointing directly towards the initial direction of the ball. Therefore, the angle of the velocity with respect to the x axis is -35° (below the horizontal).

The components of the initial momentum are:

px = (0.3 kg)(15 m/s) cos(-35° ) = 4.5 cos(-35° ) kg m/s = 3.69 kg m/s

py = 4.5 sin(-35° ) kg m/s = -2.581 kg m/s

The final momentum will be:

a)

pfx = 0

pfy = - (20 m/s) (0.3 kg) = -6 m/s

And the difference in momentum is:

dpy = pfy - py = -3.419 kg m/s

dpx = pfx - px = -3.69 kg m/s

And its magnitude:

dp = √(dpy^2 + dpx^2) = 5.03 kg m/s

b)

pfx = -6 kg m/s

pfy = 0

And the difference in momentum is:

dpx = pfx - px = -9.69 kg m/s

dpy = pfy - py = 2.581 kg m/s

And its magnitude:

dp = √(dpy^2 + dpx^2) = 10.03 kg m/s

6 0

3 years ago