Two boxes are connected by a string. The first box has a mass of 4.2 kg and the
second 2.8 kg. A string attached to the first box pulls horizontally with a force of
7.5 N. Calculate the tension in the second string if the force of friction on the first
box is 2.0 N and the force of friction on the second is 1.6 N.

Answers

Answer 1

Answer:

........

Explanation:

Two Boxes Are Connected By A String. The First Box Has A Mass Of 4.2 Kg And The Second 2.8 Kg. A String

Related Questions

before each item.
1. Which of the following refers to chemical digestion?
A. Chewing of food B.. Grinding of food C. Tearing of food D. Amylase in the saliva
2. In what organ most of the absorption process happen?
A. Stomach B. Small intestine C. Large intestine D. Esophagus
3. It is a digestive disorder wherein the body has the inability to digest sugar?
A. Gastritis B. Lactose intolerance
C. Diarrhea D. Peptic ulcer
4. The following are part of the digestion process EXCEPT
A. ingestion B. assimilation
C. excretion D. respiration
5. It helps to moisten the food and contains the enzyme amylase.
A. Saliva
B. Stomach C. Mouth D. Teeth
6. It is a process of taking in digested food nutrients into the cell by providing new protoplasm and energy
needed during the cell activities.
A. Ingestion B. assimilation C. Absorption D. Excretion
7. What causes constipation?
A. Lack of fiber in the body B. Uncontrolled growth of abnormal cells
C. Lack of enzyme lactase D. Excessive consumption of coffee and acidic drinks
8. The nutrients from the digested food are being absorbed by the following processes except
A. passive diffusion B. facilitated diffusion C. active transport D. ingestion
9. It is the organ that is responsible for reabsorbing water and minerals that are not digested in the small
intestine.
A. Stomach B. Large intestine C. Small intestine
D. Esophagus
10. The following are the reasons why digested food should be assimilated into the cell EXCEPT
A. they are converted into protoplasm. C. they provide energy needed in cell activities
B. they are needed to store fats. D. they are converted to build cell membranes
11. What is the best treatment for a person who suffers lactose intolerance?
A. Take antibiotics
B. Balanced diet
C. Take lactase supplements before eating food contains dairy D. Practice healthy lifestyle
12. What happen during the assimilation process?
A. Absorbed nutrients are delivered into the cell
B. Breaking down of food into tiny pieces
C. Elimination of waste product of the digestion process D. Absorption of nutrients from the digested food
13. How does the enzyme amylase help in the absorption of nutrients?
A. It helps in the digestion of proteins.
B. It helps in the digestion of fats.
C. It helps in the digestion of carbohydrates. D. It helps in the digestion of lipids.
14. It is characterized as loose bowel caused by an infection of bacteria that we get from the food we eat.
D. GERD
A. Diarrhea
C. Gastritis
B. Peptic Ulcer
15. How saliva helps in the digestion process?
A. It reabsorbs nutrients from the food we eat.
B. It contains the enzyme amylase that helps in the digestion of starch.
C. It absorbs nutrients and distribute it in the bloodstream.
D. All of the above
16. How colon cancers can be treated?
B. By exercising
A. By eating foods rich in fiber
D. By undergoing surgeries.
g C. By taking lactase supplements​

Answers

Answer:

1:D

2:B

3:B

4:D

5:A

13:A

14:A

15:B

16:A

7:A

9:B

8:B

11:C

12:A

Explanation:

Sorry for incomplete answers

Which statement correctly describes mass-energy equivalence?

A. All energy in the universe will be converted to an equivalent amount of mass.

B. Mass can decrease in nuclear changes without the production of energy.

C. All energy in the universe is a result of mass being converted into energy.

D. A large amount of mass is equivalent to a small amount of energy.


C is the answer on edge 2021

Answers

Answer:

C. All energy in the universe is a result of mass being converted into energy.

Explanation:

Answer:

C

Explanation:

edgeee

A Star fleet science officer drops a large rock from a height of 1.55 m onto the surface of an alien planet. The rock strikes the ground in 0.230 s. Determine the acceleration of gravity.

Answers

Answer:

58.6 m/s²

Explanation:

Applying,

s = ut+gt²/2............ equation 1

Where s = height of the rock, u = initial velocity, t = time, g = accelration due to gravity of the planet.

From the question,

Given: s = 1.55 m, t = 0.23 s, u = 0 m/s (dropped from an height)

Substitute these values into equation 1

1.55 = (0×0.23)+g(0.23²)/2

1.55 = 0.0529g/2

0.0529g = 3.1

g = 3.1/0.0529

g = 58.6 m/s²

A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. A defibrillator passes 18 A of current: through the torso of person in 2.0 ms- (a) How much charge moves during this time

Answers

Answer:

q = 0.036 C

Explanation:

Given that,

Current passes through a defibrillator, I = 18 A

Time, t = 2 ms

We need to find the charge moved during this time. We know that,

Electric current = charge/time

[tex]q=It[/tex]

Put all the values,

[tex]q=18\times 0.002\\\\q=0.036\ C[/tex]

So, 0.036 C of charge moves during this time.

What is the speed of the curiosity rover if it travels 10,000 ft. In 25 hours

Answers

Answer:

it is going 1.894miles in 25 hours so it travels 0.07576 miles per hour

What statements are true???

Answers

Answer:

Explanation:

opposite charges attract

same charges repel

neutral charges don't attract or repel

Examples of usage of fluid pressure in real life

Answers

Answer:

Syringes are used to take blood for blood tests. The pressure of the liquid (blood) forces the liquid to move into the syringe when its plunger is withdrawn. When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

please mark as brainliest

Answer: The area of the edge of a knife’s blade is very small

Syringes are used to take blood for blood tests.

When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

Skis have a large area to reduce the pressure on the snow.

Which of these planets is the odd one out based on their physical features?
a. Mars
b. Uranus
c. Jupiter
d. Neptune

Answers

Answer:

mars

Explanation:

the planet that is the odd is Mars

EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 100pts-

(if you put links or don't answer accordingly im reporting your account)

Answers

Answer:

look at the picture i have sent

Answer:

solution given:

frequency[f]=215.0Hz

velocity[V]=x

wave length=2.4m

we have

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

2.4m=[tex] \frac{x}{215} [/tex]

2.4×215=[tex] \frac{x}{} [/tex]

x=516 m/s

velocity=speed =516m/s


А
man of mass
77kg stands on a
Spring-weighing
Machine
inside a lift
When the lift starts to ascend, its accel-
eration 2 m/s2. what will be reading on.
the machine?

Answers

Explanation:

The reading on the scale is

W = m(g + a)

= (77 kg)(9.8 m/s^2 + 2 m/s^2)

= 908.6 N

what can electromagnetic and mechanical waves not carry?

Answers

Answer:

Water ;)

Explanation:

have a great rest of your day :)

8. The mediator particle for gravitational force is on
(1 Point)
gluon
vector boson
photon
gravitone​

Answers

Answer:

Gravitone

Explanation:

In theories of quantum gravity, the graviton is the hypothetical quantum of gravity, an elementary particle that mediates the force of gravity. There is no complete quantum field theory of gravitons due to an outstanding mathematical problem with renormalization in general relativity.

Can Someone please help me!

What is deposition

Answers

Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass

Answer:

the noun of deposition is the action of deposing someone, especially a monarch.

Four 29-ohm resistors are connected in series to an ideal 10-volt battery. What is the equivalent resistance of the circuit?

Answers

Answer:

Equivalent resistance of the circuit is 116 ohm.

Explanation:

Finding the equivalent resistance of the circuit. Since, 29 ohm resistors are connected in series, so

→ Equivalent resistance = R_1 + R_2 + R_3 + R_4

→ Equivalent resistance = (29 + 29 + 29 + 29) ohm

→ Equivalent resistance = 116 ohm

i really need help, whats 2+2

Answers

Answer:

2+2 =4

Explanation:

i counted my fingers ✌✌

If V is the original volume, V' is the new volume, T is the original Kelvin temperature, and T' is the new Kelvin temperature, how is Charles's law expressed mathematically

Answers

Answer:

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Explanation:

Given the following data;

Original volume = V

New volume = V'

Original temperature = T

New temperature = T'

To write an expression for Charles's law;

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Please help the right answer get the Brainly and this is physical science btw

Sadie rides her bike 1600 m East and then turns around and goes 800 m
West. What is her displacement?

Answers

Answer:

(1600 m east) + (800 m west) = (800m east)

Her displacement is 800 m east.

Explanation:

Displacement is the distance and direction between the starting point and ending point,regardless of the route traveled between them.

the teacher said to the students you can go home change the folowing sentence into indirect​

Answers

Explanation:

The teacher said to the students you can go home.

Into indirect speech

The teacher told the students that they could go home.

Hope it will help :)❤

Justin mixed two cups of lemon juice and two cups of sugar with a gallon of water in a pitcher. What happened to the lemon juice, sugar, and water?

Answers

Answer:

The correct answer is - Lemon juice hydrolyzes sugar and dissolves it faster and creates a solution.

Explanation:

When mixing lemon juice and sugar in water are mixed together, the lemon juice dissolves the sugar faster as it has citric acid that hydrolyzes sucrose molecules of sugar in glucose and fructose.

This mixing of all three lemon juice, water, and sugar form a solution. Here in this solution, water is solvent, and sugar and lemon juice are solutes. The quantity of all three determined the nature of the solution if it will be acidic or more diluted.

calculate the work done by 2N force directed at 30 degree to the vertical to move a 500g box a horizontal distance of 400 cm across a rough floor at constant speed of 0.5 m per second​

Answers

Answer:

there is no picture :o?

Explanation:

:oo

Plastics are used in millions of objects we use every day. Why are plastics NOT considered natural resources?
A. They are recyclable.
B. They are made by people. C. They are bad for the environment.
D. They are made entirely from nonrenewable resources.

Answers

Answer:

letter C. they are bad for the environment

Can you tell from an FBD if an object is moving or not? Explain your response.

Answers

Answer:

Yes it is possible to tell if an object is moving or not using a FBD based on Newton's Laws of Motion

Explanation:

A Free Body Diagram is the representation of an object in a diagram that shows (all) the vector of the forces that act on the object

When the sum of all the force vectors acting on the body give a resultant force the object will move in the direction of the force according to Newton's First Law of motion, which states that an object will continue in its rest state or   continue its uniform motion on a straight path unless a force acts on the object

The net force, 'F', can be represented according to Newton's Second Law of motion which is F = m·a, where 'a' represents the acceleration (rate of change in velocity) of the object as the object begins to move from rest

Therefore;

From a FBD it is possible to tell if an object is moving or not.

How much heat is required to raise the temperature of 100 g of water from 5 degree celsius to 90 degree celsius?​

Answers

Explanation:

1-How many moles of NazCOs are in 10.0 ml of a 2.0 M solution?

2-How many moles of NaCl are contained in 100.0 ml of a 0.20 M solution?

3- What weight (in grams) of H2SO4 would be needed to make 750.0 ml of

2.00 M solution?

4-What volume (in ml) of 18.0 M H2SO4 is needed to contain 2.45 g H2S04?

Which car has the greater momentum?
A. m=18kg v=10m/s
B. m=28kg v=2m/s
C. m=18kg v=30 m/s
D. m=10kg v=10 m/s

Answers

The answer is C. p=mv p=18x30 = 540kgm/s

a volleyball player has spiked the ball. At the instant the ball leaves her hand, it is 2.6 m above the ground and has an initial vertical velocity of -20 m/s. How long will it take the ball to strike the ground if the opposing team doesn't block it?

Answers

Answer: 29.48 s

Explanation:

Given

The initial height of the ball is [tex]h=2.6\ m[/tex]

The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]

Using the equation of motion

[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]

Therefore, it take 29.48 s for ball to reach the ground.

in 4 seconds, a cheetah can run 112 meters. How fast does this cheetah have to be running? A: 448 m/s || B: 28 m/s || C: 56 m/s || D: 36 m/s​

Answers

Answer:

B: 28m/s

Explanation:

Use the speed formula

Speed =distance / time

Answer:

[tex]\boxed {\boxed {\sf B. \ 28 \ m/s}}[/tex]

Explanation:

If we want to know how fast the cheetah is running, we need to calculate its speed. This is the rate at which an object moves and the formula is distance divided by time.

[tex]s=\frac{d}{t}[/tex]

The cheetah ran 112 meters in 4 seconds.

d= 112 m t= 4 s

Substitute the values into the formula.

[tex]s=\frac{112 \ m}{ 4\ s}[/tex]

Divide.

[tex]s= 28 \ m/s[/tex]

The cheetah's speed is 28 meters per second and choice B is correct.

Astronomers have measured that there is more helium in the universe than can be explained by the fusion in stars over the last 13 billion years. How do they think the extra helium got into the universe

Answers

Answer:

From big bang and stars.

Explanation:

The extra helium got into the universe through big bang and fusion reaction that occur in stars. Our universe formed about 13.7 billion years ago with big explosion, this event is known as big bang. The fusion of hydrogen nuclei in the stars produces helium and energy so we can say that most of the extra helium got into the universe through fusion reaction that occur in the stars continuously.

A 12.0 kg object is stationary on a surface that is inclined 30.0° relative to the horizontal. The coefficient of friction is 0.65. Use a free body diagram to determine the magnitude of the force of static friction on the block.
Help please?

Answers

Answer:

hope you can understand the calculations

PLS ANSWER QUICK I HAVE A COUPLE MINUTES.

An object moves through space with balanced forces acting on it. Which statement
best describes the speed and direction of the object as long as the forces acting on it
remain balanced?


A. The speed and direction of the object will both change.

B. The speed and direction of the object will remain constanti

C. The speed will change, but the direction will remain constant.

D. The speed will remain constant but the direction will change

Answers

Answer:

B

Explanation:

Newton's first law of motion states that every object will continue in a state of rest or uniform motion in a straight line unless a resultant force acts on it

balanced force means resultant force is 0N

this means that the speed will not change as it uniform and the direction will not change because it will continue at the same speed in a statight line and direction

sorry man, I think it was late

hope this helps

What happens to the speed and frequency of a light ray when it passes from glass into water?
The speed decreases and the frequency increases.

The speed decreases and the frequency remains the same.

The speed increases and the frequency increases.

The speed increases and the frequency remains the same.

Answers

Answer:

The speed decreases and the frequency remains the same.

Explanation:

Had it for a castle learning assignment, guessed and got it correct.

The speed of a light ray decreases and its frequency remains the same when it passes from glass into water.

What is the speed of light?

The speed of light, also known as the velocity of light, is a fundamental constant of nature and is one of the most well-known physical quantities. It is defined as the speed at which electromagnetic radiation (light) travels through a vacuum, which has a constant value of 299,792,458 meters per second (m/s).

This speed is considered to be the fastest that anything can travel in the universe, and it is a critical component in many physical and biological processes. The speed of light is used in a wide range of scientific and technological fields, including optics, electronics, astronomy, and quantum mechanics. It is considered to be a universal constant and does not change with time, distance, or the medium through which it travels.

Learn more about light ray, here:

https://brainly.com/question/13851007

#SPJ6

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Which of the following is not an outcome of "Sherman's March to the Sea"?A. Destruction of food, supplies, and anything useful to the South.B. Frightened and appalled southerners.C. Left the state of Florida in ruins.D. Hurt the morale of the South as they realized the Confederate Army could not protect them. A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order Which of the following is one way the judicial branch limits the legislative branch?A. The Supreme Court can send Senators to jailB. The Supreme Court can send Representatives to jailC. The Supreme Court can declare a law unconstitutionalD. The Supreme Court can adjourn Congress A number is equal to half the sum of the same number and ten. Set up and equation and find that number. In your own words tell the Greek creation Myth. 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She would weep whole days, with grief, regret, despair, and misery.***One evening her husband came home with an exultant air, holding a large envelope in his hand."Here's something for you," he said.Swiftly she tore the paper and drew out a printed card on which were these words:"The Minister of Education and Madame Ramponneau request the pleasure of the company of Monsieur and Madame Loisel at the Ministry on the evening of Monday, January the 18th."Instead of being delighted, as her-husband hoped, she flung the invitation petulantly across the table, murmuring:"What do you want me to do with this?""Why, darling, I thought you'd be pleased. You never go out, and this is a great occasion. I had tremendous trouble to get it. Every one wants one; it's very select, and very few go to the clerks. You'll see all the really big people there."She looked at him out of furious eyes, and said impatiently: "And what do you suppose I am to wear at such an affair?"He had not thought about it; he stammered:"Why, the dress you go to the theatre in. It looks very nice, to me...."He stopped, stupefied and utterly at a loss when he saw that his wife was beginning to cry. Two large tears ran slowly down from the corners of her eyes towards the corners of her mouth."What's the matter with you? What's the matter with you?" he faltered.But with a violent effort she overcame her grief and replied in a calm voice, wiping her wet cheeks:"Nothing. Only I haven't a dress and so I can't go to this party. Give your invitation to some friend of yours whose wife will be turned out better than I shall."He was heart-broken."Look here, Mathilde," he persisted, "What would be the cost of a suitable dress, which you could use on other occasions as well, something very simple?"She thought for several seconds, reckoning up prices and also wondering for how large a sum she could ask without bringing upon herself an immediate refusal and an exclamation of horror from the careful-minded clerk.At last she replied with some hesitation:"I don't know exactly, but I think I could do it on four hundred francs."He grew slightly pale, for this was exactly the amount he had been saving for a gun, intending to get a little shooting next summer on the plain of Nanterre with some friends who went lark-shooting there on Sundays.Nevertheless he said: "Very well. I'll give you four hundred francs. 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