Someone please answer all 5 will mark brainliest on first answer!!!!

Answer:

The frequency of wave is 160Hz.

Explanation:

Given that the formula of speed is V = f×λ where V represents speed, f is frequency and λ is wavelength.

So first thing, you have to make frequency the subject by dividing wavelength on both sides :

[tex]v = f \times λ \: [/tex]

[tex]v \div λ = f \times λ \div λ[/tex]

[tex]f = \frac{v}{λ} [/tex]

Next you have to substitute the value of v and f into the formula :

Let λ = 2.5m,

Let v = 400m/s,

[tex]f = \frac{400}{2.5} [/tex]

[tex]f = 160Hz[/tex]

Answer: Find the answer in the explanation.

Explanation:

The earth wire act as a protective conductor in which hazardous current flows to the earth. Whenever there is a faulty flow of current, the earth wire will protect an iPad with a metal casing from eddy current by allowing the faulty current to flow directly to the earth.

With the use of fuse, an iPad with a metal casing will be protected from extreme heat due to overheating or electrical overloading as a result of short circuit.

Answer:

A. absorb heat energy and move farther apart

Explanation:

The answer is A since when a ice cube takes in heat, it changes form and melts down to a liquid : water.

The molecules in water are farther apart since they are moving around alot but can be contained in a container.

Answer: A; True

Explanation: Momentum is known to be a vector quality, and thus has been proven by modern scientists and resulting in this answer being true.

Hope this helps <3

Stay safe, stay warm

-Carrie

Ps. it would mean a lot if you marked brainliest (=

I would say Book B.

Gravitational Potential Energy is mass * gravity * height.

Gravity is same for the same, it's constant.

Book C is the lowest, so it has less height.

And Book B is clearly the more massive of Book A and Book B, which are the same height.

Book B

Answer:

72000 miles

Explanation:

If the distance between the students is 600 miles, and this implies in a 3 degree difference in the sun position, that means this 600 miles is related to 3 degrees of the circunference of the planet.

So, to find the whole circunference of the planet, that is, 360 degrees, we just need to use a rule of three:

3 degrees -> 600 miles

360 degrees -> x miles

3x = 600 * 360

x = 600 * 360 / 3 = 72000 miles

Answer:Heat from Earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.

Explanation:

Answer:

Heat from Earth’s interior causes currents of hot rising magma and cooler sinking magma to flow, moving the crust along with them.

Explanation:

Answer:

b

Explanation:

Answer:

Glass is solid.

Explanation:

It is not a liquid or gas.

Answer:

An amorphous solid

Explanation:

since glass is hard it's be a supercooled liquid but it's actually neither a liquid or a solid. It's called an amorphous solid, which is a state somewhere between those two states of matter.

Answer: 320 W

Explanation:

P = W/t

W = F * d

F = 160 N

d = 1 m

t = 0.5 s

W = 160 * 1

W = 160 J

P = 160 J / 0.5 s

P = 320 W

Answer: Speeding Up

Explanation:

Force is proportional to the acceleration of an object. The greater the force, the more acceleration will be produced.

When the force on the tire is equal to the weight of the car, the car is reaching a stability as a result of increase in motion.

But when the force of the load on the tire is quite large(most likely several times the weight of the car) and is directed forward, then, the car is at high speed.

Answer: one that makes a more mellow sound

Explanation:

One that makes a more mellow sound will have a constant frequency than the one that has a loud sound.

Fading away of sound waves depends on the wavelength of the sound. The one that has a loud sound with high frequency will have a brighter sound. While the more mellow one will have the bassier sound. Therefore, the sound with a more mellow sound will fade away faster.

Answer:

c

Explanation:

The step that has been missing in the carbon cycle has been decomposition, as it breaks the organic matter into simpler carbon that can be absorbed. Thus the correct option is C.

The carbon cycle can be defined as the transfer of carbon in varying forms in the atmosphere. Carbon has been present in the atmosphere in the form of air.

The air has been taken up by the plants for the formation of glucose. The atmospheric carbon has been converted into sugars by photosynthesis.

The sugar has been taken up by the consumers and is released back into the earth from the decomposition of the plants and waste from consumers or by the combustion process.

The carbon cycle can be given as:

Photosynthesis (Food) [tex]\rightarrow[/tex] Consumers

    Decomposition [tex]\downarrow[/tex]               [tex]\downarrow[/tex] Combustion

                            Carbon dioxide

The step that has been missing in the carbon cycle has been decomposition, as it breaks the organic matter into simpler carbon that can be absorbed. Thus the correct option is C.

For more information about the carbon cycle, refer to the link:

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Answer:

B

Explanation:

moving a car requires energy from gas, growing a plant requires energy from the sun, and getting a tan requires energy from the sun. So it must be a stationary inanimate object.

Answer: Frequency = 15Hz

Explanation:

Given that

Wavelength (λ) = 3 m

Wave speed V = 45 m/s

Wave speed is the product of frequency and wavelength. That is

V = f(λ)

Substitute wavelength and wave speed into the formula

45 = f × 3

Make f the subject of the formula

f = 45/3

f = 15 Hz

Therefore, the frequency of the ocean wave is 15 Hz

The answer is B and C are both true.

The reason we can read print from any direction is that the white part of a page reflects light in all directions. Hence, option C is correct.

Reflection is an optical phenomenon, that the light when hit on a transparent object reverts back in the straight direction making the material surface gleaming.

White light is the mixture of all the visible lights. White material absorbs all colors and all of them are reflected back making its color white. Whereas, black light is not reflecting any color but absorbs all. Thus, no reflection causes no color except the darkness.

Letters in white background is visible in all direction since white  light reflects in all directions. Thus, black letters printed in in a white page will be readable in all directions.

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Answer:

The electric force on an electron in this field [tex]3.2\times 10^{-15}\ N[/tex].

Explanation:

We have,

Electric field of along the +x-axis is [tex]2\times 10^4\ N/C[/tex]

It is required to find the electric force on an electron in this field. The electric force acting on the particle is given by :

[tex]F=qE[/tex]

q is charge of electron

[tex]q=-1.6\times 10^{-19}\ C[/tex]

So,

[tex]F=1.6\times 10^{-19}\times 2\times 10^4\\\\F=3.2\times 10^{-15}[/tex]

So, the electric force on an electron in this field [tex]3.2\times 10^{-15}\ N[/tex].

The electric force on an electron throughout this field will be "3.2 × 10⁻¹⁵ N".

An electric field throughout a force created by a charge throughout proximity to its circumstances. Whenever additional charges come into contact with this field, they are subjected to this force.

A charge's electric field at quite a point seems to be the force that somehow a unit positive (+) charge will indeed personal experience if put at around that spot.

According to the question,

Electric field = 2 × 10⁴ N/C

Charge of electron, q = -1.6 × 10⁻¹⁹ C

We know the relation,

→ F = qE

By substituting the values, we get

      = [tex]1.6\times 10^{-19}\times 2\times 10^4[/tex]

      = [tex]3.2\times 10^{-15}[/tex] N

Thus the above answer is correct.

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Answer:

A., B. & C.

Explanation:

All apply, because all these happen in a plant.

The following processes that occur in the cells of plants:

C. production of food through photosynthesis

B. removal of wastes

A. exchange of CO2 and O2

Learn more about photosynthesis:

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Answer: here you go I was looking for this answer everywhere,I have it now so it’s 6.30 x 10^-7 s

Explanation:

I hope this helps☺️

Answer:

I can confirm that it is 6.30 x 10^-7

Explanation:

Answer:

hope this helps :)

Explanation:

Answer:

1.) V = 12t^3 - 120t^2 + 252t

2.) No

3.) At positive V and negative V

Explanation: Given that the position of an object at any time t is s(t)=3t4−40t3+126t2−9.

1.) To determine the velocity V, we will differenciate the equation above with respect to t.

V = ds/dt

ds/dt = 12t^3 - 120t^2 + 252t

Therefore,

V = 12t^3 - 120t^2 + 252t

2.) The equation above depict an exponential equation which proves that the object never stops changing.

3.) The object moves to the right at positive velocity V and moves to the left at negative velocity V

i. The velocity of the object at any time is V = 12t^3 - 120t^2 + 252t

ii. The object is Not changing.

iii. At positive V and negative V.

Since the position of an object at any time t is

s(t)=3t4−40t3+126t2−9.

1.

Here the velocity is

V = ds/dt

ds/dt = 12t^3 - 120t^2 + 252t

SO,

V = 12t^3 - 120t^2 + 252t

2.) The equation above represents an exponential equation that proves that the object never stops changing.

3.) The object moves to the right at positive velocity V and moves to the left at negative velocity V

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Answer:

A positively charged ion

Answer:

Ion

Explanation:

An ion with a positive charge that is attracted to the cathode in electrolysis

Answer:

hy how are you now this is 2020 question but now it is 2022

Answer:

B

Explanation:

Answer:

The correct option is (a).

Explanation:

We have, a negative test charge experiences a force to the right as a result of an electric field. The electric force acting on a charged particle is given by :

F = qE

q is charged particle, E is electric field

The direction of electric force is in the direction of electric field. For a negative charge, the electric field points to the left because the force on a negative charge is opposite to the direction of the field.

Answer: q2 = -0.05286

Explanation:

Given that

Charge q1 = - 0.00325C

Electric force F = 48900N

The electric field strength experienced by the charge will be force per unit charge. That is

E = F/q

Substitute F and q into the formula

E = 48900/0.00325

E = 15046153.85 N/C

The value of the repelled second charge will be achieved by using the formula

E = kq/d^2

Where the value of constant

k = 8.99×10^9Nm^2/C^2

d = 5.62m

Substitutes E, d and k into the formula

15046153.85 = 8.99×10^9q/5.62^2

15046153.85 = 284634186.5q

Make q the subject of formula

q2 = 15046153.85/ 28463416.5

q2 = 0.05286

Since they repelled each other, q2 will be negative. Therefore,

q2 = -0.05286

Answer:

-0.05286

Explanation:

acellus

Answer:

The angles of reflection on both sides of the normal are always equal, so the angle of reflection is 70°. 2. The speed of light in diamond is 1.24 x 108 m/s.

Answer:

Hope it helps

Explanation:

MONOMERS

Answer:

Equivalent resistanfe in parallel (R):

1/R = 1/100 + 1/200 + 1/300

1/R = (6 + 3 + 2)/600

1/R = 11/600

R = 600/11 = 54.55 ohms

Equivalent resistance is 54.55Ω.

It is given that three resistors are,

[tex]R_{1}[/tex] = 100Ω, [tex]R_{2}[/tex] = 200Ω, and [tex]R_{3}[/tex] =300Ω

It is required to find the equivalent resistance when resistors connected in parallel.

What is the equivalent resistance?

As we know, when the resistors are connected in parallel,

[tex]\frac{1}{R} =\frac{1}{R_{1} } +\frac{1}{R_{2} }+\frac{1}{R_{3} }[/tex]

Putting the values, we have

[tex]\frac{1}{R} =\frac{1}{100} } +\frac{1}{200 }+\frac{1}{300 }[/tex]

[tex]\frac{1}{R} =\frac{(6+3+2)}{600}[/tex]

[tex]\frac{1}{R} =\frac{11}{600}[/tex]

[tex]R=\frac{600}{11}[/tex]

R=54.55Ω

Thus, equivalent resistance or total resistance when resistance are connected in parallel is 54.55Ω.

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