**Answer:**

**Explanation:**

Given;

terminal voltage, V = 5.7 V, when the current, I = 0.3 A

terminal voltage, V = 5.1 V, when the current, I = 0.9 A

The emf of the generator is calculated as;

E = V + Ir

where;

E is the emf of the generator

r is the internal resistance

First case:

E = 5.7 + 0.3r -------- (1)

Second case:

E = 5.1 + 0.9r -------- (2)

Since the emf E, is constant in both equations, we will have the following;

5.1 + 0.9r = 5.7 + 0.3r

collect similar terms together;

0.9r - 0.3r = 5.7 - 5.1

0.6r = 0.6

r = 0.6/0.6

**r = 1 Ω**

Now, determine the emf of the generator;

E = V + Ir

E = 5.1 + 0.9x1

E = 5.1 + 0.9

**E = 6 V**

Why are images reflected from a rough surface not as clear as those reflected from a smooth

surface?

**Answer:**

Just as images are reflected from the surface of a mirror, light reflected from a smooth water surface also produced a clear image. ... Consequently, the outgoing rays are reflected at many different angles and the image is disrupted. Reflection from such a rough surface is called diffuse reflection and appears matte.

**Explanation:**

hi po I hope it's help you

which of the following is an example of potential energy:

(choose 1)

- a printer that is not connected

- your cellphone, when you make a call to someone

A printer that is not connecting

What is the net force acting on a jet that has a mass of 130,000kg and it accelerates at a rate of 6m/s as it takes off

???????????????????????????????

Joel uses a force of 50 Newtons to hold two weights 0.60 meters above his head. How much work is Joel doing on the weights?

30 J w=(force)(displacement) so W=(50N)(.6m) which equals 30J

create a formula giving the strength of the induced field (B) i terms of current (I) and the distance from the wire to the probe (d)

If this is a long straight wire, then you probably mean:

B = μ₀I/(2πd)

B = μ₀I/(2πd)

What is the geocentric angle of the earthquake focus?

**Answer:**

epicenter

**Explanation:**

the epicenter Is d point directly above it at the structure of the earth

The current in the wires of a circuit is 60.0 milliAmps. If the

voltage impressed across the ends of the circuit were

doubled and the resistance were tripled, then its new current

would be ___ milliAmps.

**Answer:**

I' = 40 mA

**Explanation:**

Given that,

The current in the wires of a circuit is 60.0 mA.

If the voltage impressed across the ends of the circuit were doubled and the resistance were tripled such that,

V' = 2V and R'=3R

The relation between current, voltage and resistance is given by :

**V = IR**

Let I' be the new current. So,

**V'=I'R'**

⇒ [tex]I'=\dfrac{V'}{R'}\\\\I'=\dfrac{2V}{3R}\\\\I'=\dfrac{2}{3}\times \dfrac{V}{R}\\\\I'=\dfrac{2}{3}\times I\\\\I'=\dfrac{2}{3}\times 60\\\\I'=40\ mA[/tex]

**So, the new current would be 40 mA. **

A box weighs 25N. How much mass does it have?

**Explanation:**

If box weight 25N on ground

MA=F

M(10)=25

M=2.5Kg

The hot resistance of a 125V filament lamp is 500Ω. Determine the current taken by the lamp and its power rating.

**Answer:**

0.25 amps

**Explanation:**

V = IR

125 = I(500)

I = 0.25 amps

b. What is the man's weight on Mars where the acceleration due to gravity is

3.7 m/s2 ? Show your answer in both Newtons and pounds.

**Answer:**

How much is the mass of man?

1 point

Question 11

A swimmer feels cold after leaving warm water on a warm, windy day.

Why does she feel cold even though the air is warm?

A. The less energetic water molecules on her skin escape quickly.

B. The more energetic water molecules on her skin do not escape quickly.

С The water on her skin does not evaporate quickly enough to keep her warm.

D. The water on her skin evaporates quickly and cools her skin.

**Answer:**

D. The water on her skin evaporates quickly and cools her skin.

**Explanation:**

A tugboat is pulling a barge into a harbor. The barge is exerting a force of 3000 N against the tugboat.

Available options are:

A. –4500 N

B. –2500 N

C. 2500 N

D. 4500 N

Answer:

-4500 N

Explanation:

Given that we have F₁ = 3000N? (force of the barge)

the force of the tugboat is F '

To pull the barge, the force of the tugboat must be greater than or equal to the force of the barge.

Hence, according to Newton's third law which states that for every action or force in nature, there is an opposite reaction.

Therefore considering the available option the correct answer is "- 4500N, " this is because it is greater than the force of the barge and it's in opposition to the force exerted.

**Answer:**

The answer is -4500 N

**Explanation:**

PLEASE HELPPPPP!!!!! ILL GIVE CROWN

Denver, Colorado is located near the rocky mountains. Which list of controls below would have the strongest influence on the weather in Denver.

A ) Ocean currents, distance from large bodies of water, and altitudes

B ) Altitude, topography, and ocean currents.

C ) Latitude, altitude, and topography

D ) Topography, ocean currents, and latitude.

Answer:To understand the regional and local climates of Colorado, you must begin with a basic knowledge of Colorado's topography. Colorado lies astride the highest mountains of the Continental Divide. Nearly rectangular, its north and south boundaries are the 41° and 37° N. parallels, and the east and went boundaries are the 102° and 109° W. meridians. It is eighth in size among the 50 states, with an area of over 104,000 square miles. Although known for its mountains, nearly 40 percent of its area is taken up by the eastern high plains.

Of particular importance to the climate are Colorado's interior continental location in the middle latitudes, the high elevation of the entire region, and the mountains and ranges extending north and south approximately through the middle of the State. With an average altitude of about 6,800 feet above sea level, Colorado is the highest contiguous State in the Union. Roughly three-quarters of the Nation's land above 10,000 feet altitude lies within its borders. The State has 59 mountains 14,000 feet or higher, and about 830 mountains between 11,000 and 14,000 feet in elevation.

Explanation:

**Answer:**

D

**Explanation:**

Hope this helps :)

What happens to the arrangement of atoms in matter as it is heated?

**Answer:**

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance.

**Explanation:**

Atoms speed up and create more energy/heat.

A food has 2 grams of protein, 2 grams of carbs, and 2 grams of fat. How many total calories does this food have? HELP

**Answer:**** ***6 grams*

**Explanation:**

**Cause 2+2+2=6**

DESPERATE WILL GIVE BRAINLIST AND THANKS

Which condition would have resulted from the functions of prokaryotes on early Earth?

Earth's oceans grew larger

less oxygen gas became present in the atmosphere

less carbon became present in Earth's soil

more oxygen gas became present in the atmosphere

Hope this helps!

the answer is B.

the answer is B.

Answer: D. more oxygen gas became present in the atmosphere

Explanation:

I just took the test and that was the answer

The first mineral to melt from a rock is

**Answer:**

Quartz

**Explanation:**

**Answer:**

Quartz

**Explanation:**

The temperature must be high enough to melt at least some minerals in the rock. The first mineral to melt from a rock will be quartz

Correct the following statement:

Wind is caused by the revolution of the Earth around the Sun.

O Wind is caused by the rotation of the Earth.

O Wind is caused by the differences in air pressure on Earth's surface.

This statement is already correct.

O Wind is caused by the greenhouse effect.

**Answer:**

It's the 3rd option

**Explanation:**

Wind is caused by the differences in air pressure on Earth's surface.

does uranium use steam?

**Answer:**

Yes.

**Explanation:**

Reactors use uranium for nuclear fuel. The uranium is processed into small ceramic pellets and stacked together onto sealed metal tubes called fuel rods. The heat created by fission turns the water into steam.

Speed = Distance Time Velocity = 1. Find the velocity of a truck that travels 75miles north in 2.5 hours? List: Equation: Substitution: Answer with units:

**Answer:**

187.5 m/s (i think)

**Explanation:**

If you use the formula V= T times displacement you can find this out by doing the following-

Displacement equals 75 m

T equals 2.5 hrs

75x2.5= 187.5

and since velocity is measured in m/s, it becomes

187.5 m/s

Determine the kinetic energy (in joules) of a 1000 kg roller coaster car that is moving with a speed of 25.0 m/s?

The correct answer is 312,500j

Explanation : using KE formula 1/2 m v^2 .

Explanation : using KE formula 1/2 m v^2 .

A 0.144 kg baseball approaches a batter with a speed of . The batter lines the ball directly back to the pitcher with a speed of . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat 20 m/s 30 m/s.

**Answer:**

**What**** ****you**** ****say**** ****¡**

** **

**no**** ****pagal**

** ****Mayur**** ****is**** ****very**** ****very**** ****shame**

HELP ME PLEASE I need the answer now and I will give all my brain lists

**Answer:**

I'd say it's B

Sorry if I get you wrong-

plaque contains billions of bacteria true or false

**Answer:**

true

**Explanation:**

Answer: True

Explanation:

Helppp!!!!! Please!!

A 0.144 kg baseball approaches a batter with a speed of . The batter lines the ball directly back to the pitcher with a speed of . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat 20 m/s 30 m/s

**Complete question:**

A 0.144 kg baseball approaches a batter with a speed of 20m/s . The batter lines the ball directly back to the pitcher with a speed of 30m/s . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat

**Answer:**

(1) The impulse exerted by the ball is **7.2 kg.m/s**

(2) The average force exerted on the ball by the bat is **600 N.**

**Explanation:**

Given;

mass of the baseball, m = 0.144 kg

velocity of the baseball, v₁ = 20 m/s

velocity of the batter, v₂ = -30 m/s (opposite direction to the ball's speed)

The impulse exerted by the ball is calculated as follows;

J = ΔP = mv₁ - mv₂

ΔP = m(v₁ - v₂)

ΔP = 0.144 [20 - (-30)]

ΔP = 0.144 ( 20 + 30 )

ΔP = 0.144 (50)

ΔP = 7.2 kg.m/s

The average force exerted on the ball by the bat is calculated as;

[tex]F = \frac{\Delta P }{t} \\\\where; t \ is \ time \ of \ contact= 0.012 \ s\\\\F = \frac{7.2}{0.012} \\\\F = 600 \ N[/tex]

Hurry up i need help.

The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be __________.

Question 1 options:

Different

The same

Not equivilent

With in 500 degrees of eachother

**Answer:**

The answer would be** B) The Same**

**Explanation:**

Not gonna lie I checked my class notes but I figured this would help :)

Good luck!!!

Law of superstition which was deposited first

**Answer:**

E is the answer.

**Explanation:**

What has more kinetic energy 15 kg ball rolling north at 15 m/s or a 15 kg ball rolling backwards at 7m/s

**Answer:**

15 kg ball

**Explanation:**

How are gamma rays used for communication?

**Answer:**

No

**Explanation:**

Electromagnetic radiation is used for communications and transmission of information. The waves that are used in this way are radio waves, microwaves, infrared radiation and light.

CAN A BRAINLEST HELP PLEASE!!!

The diagram below represents a rope along which

two wave pulses of equal amplitude, A, approach

point P

Might be A good luck

which inequality is true if p = 3.4
Help plz. I don't get this.
2. Rachel's Gift ShopThe motto of Rachel's Gift Shop is Real Friends Give Real Gifts!" Rachel's GiftShop sells a variety of gifts- coffee mugs, pens, dress, shoes for men and women.A famous mayor says, I've shopped at Rachel's for ten years and I have neverbeen disappointed. What persuasive device is used in the tagline, Real FriendsGive Real Gifts"?A testimonialC. exaggerationB. bandwagonD. repetition
What is the volume of an aquarium if 50cm long 10 cm broad 15 cm high
9. If the concentration of water inside a cell is lower then outside the cell, what will be the netmovement of water molecules be? *(1 Point)a) Into the cell.b) Out of the cell.
What stretches and strength exercises would you recommend to this client performing the squat?A)Lat SMR and calf raiseB)calves SMR and front step up to balanceC)seated adductor stretch and lateral tube walking/ball squat w/ abductionD)Standing levator stretch and ball cobra
Find the solution of the system of equations.10x+6y= 1610x+5y= 50
Select the surface that would most reflect the most light.
if your answer is -2 what is my solution
Hello, hope that you're doing well today :) May I ask you if you can help me with this exercise? Please Thank you so much for your help!
Why do you think Phillip Hoose titled this chapter Crazy Times?Phillip Hoose titled this chapter Crazy Times because __________.
Determine the meaning of the italicized word in the following sentence based on the context clues providedMrs. Maple's dog obediently waited for his treat for fetching the newspaper, despite his eagerness for it(1 point)A.happilyB.carefullyC.enthusiasticallyD.willingly
can somebody help me?
3x+5=12-7x solve? Help
What were three major "powers" the Articles of Confederation werelacking?
n + 9 = 14 solve isolate the variable
what is x? (7x+1)=(9x-7)
I need help with number 2
1. Use the triangle below to determine the values indicated:
Can you help me with this? (easy)