Question 2
When the frequency of SOUND changes, we hear a change in
when the frequency of LIGHT changes we see a change in
А
intensity, color
9
B
loudness, brightness
С
pitch, color
D
pitch, brightness
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Answer:

625 W

Explanation:

Applying

P = W/t.................... Equation 1

Where p = power, W = Work, t = time

But,

W = Force (F) × distance (d)

W = Fd........................ Equation 2

Substitute equation 2 into equation 1

P = Fd/t.................... Equation 3

From the question,

Given: F = 5000 N, d = 30 m, t = 4 munites = (4×60) seconds = 240 seconds

Substitute these values into equation 3

P = (5000×30)/240

P = 625 Watt

Answer: space race automobiles

Explanation:

they were used in space to get to planets

Answer:

When you move players towards home plate in order to make the play at home.

Answer:

Explanation:

same idea as before Liam,  first, find the parallel resistance in 35 || 20

(35*20)  / (35+20)  = 700 / 55  = 12.727272 ohms

now add the  12.727272 + 15 = 27.727272 ohms total resistance

V = IR

10 = I *    27.727272

10 / 27.727272 = I

0.360655 = I

V = IR  (again, but across the 15 ohm resistor)

V =     0.360655 * 15      

V = 5.4098                

Answer:

150J

Explanation:

Pi = Pf + Kf

200 = 50 + Kf

---> Kf = 150J

The kinetic energy of the swing at its lowest point is 150 J.

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.

Given in the question the potential energy of a swing is 200 J at its highest point and 50 J at its lowest point

Pi = Pf + K E

200 = 50 + K E

K E = 150 J

The kinetic energy of the swing at its lowest point is 150 J.

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Answer:

90.15K

Explanation:

The formula is x°C + 273.15 = yK

Answer:

(-183°C) = 90.15K

Explanation:

-183°C is given

Now,

K = °C + 273

K = (-183) + 273.15

K = 90.15

Thus, (-183°C) = 90.15K

-TheUnknownScientist

Answer:

a. heat your telescope, so its delicate optics are not cold

Explanation:

If star is just born and giving off  faint radiation in infrared. These radiation would be long range infra red radiation as the star is just born having less surface temperature.

In order to locate the star through telescope, it must be positioned at higher altitudes so that water vapor is minimum. The radiation from other heating objects might alter the light coming through the cosmos. Therefore, it is mandatory to shield the telescope from foreign radiations.

For the same reason mentioned above the telescope must have cold surroundings. Moreover, optics of the telescope must also be kept free from dust and dirt for clear vision.

However, Heating of telescope in order to safe optics from cold must not be done. This would change the wavelength of long range infra red radiations from star and hence, its location.

Answer:

i agree

Explanation:

Answer:

Colour of any object is by the colour of light it reflects i.e if white light is incident on the object,it will reflect blue color.so it will appear blue.But if red light is incident on it,it will not reflect that and absorb it.so as it will not reflect any light it will appear black.

Explanation:

Answer:

b.      

If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet. ... The current flowing through the wire makes the wire hot and drains the battery quickly.

Explanation:

Answer:

KE = 54450 J

Explanation:

Data:

Use the formula:

Replace and solve:

A kinetic energy of 54450 Newtons is imparted to it.

Greetings.

Answer:

Continental slope

Answer: The answer is Seamount. A seamount is  a submarine mountain located  on oceanic crust near mid-ocean. The image shows a very long seamount in Massachusetts and that is formed by volcanic activity in New England Seamounts.

Answer:

0.175g

Explanation:

A = A02^-(t/hl)

= (5.6g)2^-(750/150)

= 0.175g

Answer:

Explanation:

dwadad

the answer is true like and sub to zeelitmotion                                     :      

Answer:

Explanation:

Considering that this is parabolic motion, we know that the time the ball is in the air begins the instant it leaves the ground, reaches up to its max height, and then begins falling until it reaches the ground. Duh, right? Some important things happen during this trip. There are a few things we need to know in order to even begin the problem. Parabolic motion has x and y coordinates because it is 2-dimmensional; the acceleration in the x dimension is not the same as the acceleration in the y dimension; the velocity of an object at its max height is always 0; the time it takes to reach its max height (where the max height is half the distance the object travels) is half the time it takes to make the whole trip. Yikes. That's a lot to know and much to remember! Don't you just LOVE physics!?

For a. the hang time is the time the ball was in the air. Some of that stuff we talked about above is pertinent to solving this problem. We know that the velocity of the ball is 0 at its max height, and we also know that if we find the time it takes to reach its max height, we can double that number to find how long it was in the air for the whole trip. Use the one-dimensional equation

[tex]v=v_0+at[/tex] to find out how long it took to reach the max height. Even though we don't yet know the max height, we DO know that the velocity at that point is 0. BUT before we do that, since we are working in the y-dimension only, it would behoove us (benefit us) to find the velocity particular to this dimension. We are going to answer c. first, then backtrack.

c. wants the initial vertical velocity. That is found in the magnitude of the "blanket" or generic velocity times the sin of the angle, namely:

[tex]V_y=25sin(45)[/tex] so

[tex]V_y=[/tex] 18 m/s Now we can use that as the initial upwards velocity in part a:

[tex]v=v_0+at[/tex] and filling in:

0 = 18 + (-9.8)t and

-18 = -9.8t so

t = 1.8 seconds. But remember, this is only half the time it was in the air. The whole trip, then, takes 2(1.8) which is

t = 3.6 seconds

That's a and c. Now for b:

b. asks for the x component of the velocity:

[tex]V_x=Vcos\theta[/tex] which works out to be the same as the vertical velocity, since the sin and cos of 45 degrees is the same:

[tex]V_x=25cos45[/tex] and

[tex]V_x=[/tex] 18 m/s

Onto d:

d. wants the max height. Remember, it took 1.8 seconds to get to the max height, so using yet another one-dimensional equation:

Δx = v₀t + [tex]\frac{1}{2}at^2[/tex] where Δx is the displacement, v₀ is the initial upwards velocity, a is the pull of gravity, and t is the time it takes to reach that max height (Δx, our unknown). Filling in:

Δx = [tex]18(1.8)+\frac{1}{2}(-9.8)(1.8)^2[/tex] and if you do the rounding correctly, you'll end up with this:

Δx = 32 - 16 so

the max height, Δx, is 16 meters.

e. wants the range. That translates to the distance the ball traveled. This is found in a glorified version of d = rt, where d is displacement, r is velocity, and t is...well, time (that doesn't change):

Δx = vt so

Δx = 18(3.6) remember that the ball was in the air for a total of 3.6 seconds, so

Δx = 65 meters.

Phew!!!!! That's a lot! I suggest you learn your physics or this will make you insane by the end of the course!

Answer:

3

Explanation:

Answer:

The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

Explanation:

I hope that helps! (B is the answer)

The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects.

The force is no longer felt by the two objects when the interaction ends. Only when there is interaction do forces actually exist.

Action-at-a-distance forces are those that happen even when the two interacting objects are not physically touching each other but are nevertheless able to push or pull against each other despite their physical separation.

Therefore, The equation for acceleration can be rewritten as B to calculate the net force acting on an object when its mass and acceleration are known.

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Answer:

Solution given:

frequency[f]=60,500,000Hz

velocity[V]=300,000,000m/s

wave length=?

we have

wave length=[tex] \frac{V}{f} [/tex]

=[tex] \frac{300,000,000}{60,500,000} [/tex]

=[tex] \frac{3000}{605} [/tex]=4.96 m

Option A.4.96m

Answer:

4.96

Explanation:

Wavelength = Speed ( velocity ) over Frequency

If frequency = 60,500,00 and Velocity = 300,000,000

Then, Wavelength = [tex]\frac{300,000,000}{60,500,00}[/tex] which is equivalent to 4.96

Answer:

Could you translate it to Korean or English...

Explanation:

Answer:

Gravitational

Explanation:

When studying atoms, scientists can ignore the  gravitational force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.

Answer:

Gravitational

Explanation:

Answer:

a convex lens forms a larger, virtual image

Explanation:

The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.

A convex is defined as a lens in which the reflecting surface is bent inwards. It is thicker in the middle and thinner at the edges.

Here,

The convex lenses are the type of lens that can converge the beam of light coming from outside and reflect the rays and focus them on a point at the other side.

Convex lens is also known as a converging lens.

The image of the object here is formed on the opposite side of the object, so it is a virtual image that has been formed here.

The size of the image formed here is larger when compared to the size of the object. Thus larger image formed.

Thus the convex lens formed a larger and virtual image of the object here.

Hence,

The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.

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Answer:

In marine ecosystems, climate change is associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification. There are also strong linkages between climate and species distributions, phenology, and demography.

Explanation:

Mark her brainliest

Answer: 0.899

Explanation:

acellus

Answer: 0.899

Explanation: It's right in acellus I just did it

Question :

If a body acquires a charge of -0.02 C, has it gained or lost electrons? Many?

Solution :

We know, charge gained is shown by negative sign.

Since, charged acquired is given as -0.02 C .

Therefore, it is body has gained electrons.

Now, number of electrons is given by :

[tex]n = \dfrac{net\ charge}{charge \ on \ one \ electron}\\\\n = \dfrac{-0.02}{-1.60 \times 10^{-19}}\\\\n = 1.25\times 10^{17}[/tex]

Hence, this is the required solution.

Answer:

10m/s

Explanation:

a = v- u/ t

=> v = at + u

= -2 × 5 + 20

= 10m/ s. ( 72 km/ h = 20 m/ s)

Answer:

Solution given:

frequency[f]=60,500,000Hz

velocity[V]=300,000,000m/s

wave length=?

we have

wave length=[tex] \frac{V}{f} [/tex]

=[tex] \frac{300,000,000}{60,500,000} [/tex]

=[tex] \frac{3000}{605} [/tex]=4.96 m

Option A.4.96m

Answer:

Its C, the only thing you do is add both of the numbers and get your answer which is C.

Explanation:

Answer:

0.923

Explanation:

Use the formula current equals voltage /resistance

Answer:

Electromagnetic waves are reflected

Explanation:

Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. ... This concept is often termed the Law of Reflection.

Electromagnetic waves are reflected by the shiny surfaces. The correct option is 1.

These are the rays which mostly come from the Sunlight. It possess energy or defined by energy of photon.

Reflection of light occurs when the waves strike a surface or boundary that does not absorb the energy of the radiation but bounces the waves away from the surface. This is often called the Law of Reflection.

Thus, the Electromagnetic waves are reflected by the shiny surfaces. The correct option is 1.

Learn more about electromagnetic waves.

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Answer:

The car's kinetic energy is 751,500 J.

The car's potential energy is 0 J.

Explanation:

The kinetic energy equation is used as KE = 1/2mv^2 and the potential energy equation is used as PE = mgh.  Your mass for the car is 1670 kg and the velocity would be 30 m/s.  30^2 would equal to 900 and you multiply that by 1670 for 1,503,000.  Divide that number by 2 since there is 1/2 behind it to get your car's kinetic energy which is 751,500 J.

The potential energy which is calculated by mass times gravitational energy times height would be 0 J.  Because the car is at a standard height on the ground, it would make sense for the height to be 0 meters and when multiplying it, your total potential energy would be 0 J.