How much energy does it take to heat 250 g of water from 10.0°C to 85.0 °C? (density of water = 1000 kg/m3, specific heat of water = 1 cal/g °C = 4186 J/kg K) a) 8.70x104 cal. b) 1.88x104 cal. c) 7.85x104 cal. d) 78.5 cal.

Answers

Answer 1

The energy needed to heat 250 g of water from 10.0°C to 85.0 °C IS 1.88 x 10⁴ cal. Therefore, the answer is (b) 1.88x10⁴ cal.

To calculate the energy needed to heat 250 g of water from 10.0°C to 85.0 °C, we need to use the formula:

Q = m x c x ΔT

Where Q is the energy needed (in joules), m is the mass of water (in kilograms), c is the specific heat of water (in joules per kilogram per Kelvin), and ΔT is the temperature change (in Kelvin).

First, we need to convert the mass of water from grams to kilograms:

m = 250 g / 1000 = 0.25 kg

Next, we need to calculate ΔT:

ΔT = 85.0 °C - 10.0°C = 75.0 K

Now, we can substitute these values into the formula:

Q = 0.25 kg x 4186 J/kg K x 75.0 K

Q = 7.85 x 10⁴ J

To convert this to calories, we need to divide by 4.184:

Q = 1.88 x 10⁴ cal

Therefore, the answer is (b) 1.88x10⁴ cal.

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Related Questions

If Steve races on the highway going south for 2430 meters in 40 seconds what is his velocity?

Answers

Answer:  60.75 m/s

Explanation:

2430 m / 40s = 60.75 m/s

what is the wavelength of these waves???

Answers

Answer:

The wavelength is 6 meters.

Explanation:

friction is a:
A.balance force
B.unbalance force
C.type of motion
D.type of direction

Answers

Answer:

c

Explanation:

becaz its motion and without motion u cant get friction

Answer:

A

Explanation:

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What causes a liquid to freeze? A. When particles speed up and get closer together. B. When particles stop moving. C. When particles slow down and get closer together. D. When particles speed up and get farther apart.​

Answers

Answer:The answer is C

Explanation:

What is one enThe law of conservation of energy states that energy can neither be created nor destroyed. What does “conservation” mean in this law?ergy transformation that is taking place in the photo?

Answers

Answer:

The preservation of a physical quantity during transformations or reactions.

Explanation:

Is there a difference in how a black shirt or a white shirt affects our exposure to us radiation?

Answers

There is a difference of exposure to radiation to a black shirt and a white shirt but I think the difference is so insignificant that it’s not even considered different. The effects of radiation wearing a dark colored shirt on a sunny day to humans is probably not significantly different enough to warrant not wearing your favorite band tee out of fear you will get radiation poisoning.
But there is definitely a difference in heat. If you insist on wearing a black shirt and you want to avoid having a heat stroke then you should probably consider bringing water, maybe an extra shirt and sun screen if you have to be outside for more than 10-15 minutes.
Under the sun, the black shirt absorbs all wavelengths (more light). A white shirt reflects the visible light that hits it.
heat follows the same laws of conservation of light energy. This means light energy and heat cannot be created or destroyed. The light and heat has to go somewhere.
The light doesn’t cause the heat but they follow the same rules so instead of visually seeing the lack of light, you feel the heat energy that is being absorbed by your shirt.
you are exposed to the same amount of radiation wearing a black shirt as you are the white shirt. The difference is the “color” (because some people don’t consider black and white a color) and how light reacts to it.

I hope I was able to help!! This was a great question :)!!

4. A group of students made a rocket and launched it vertically upwards with velocity
of 27ms^-1. What is the total distance travelled by the
rocket?

[Assume g=10ms^2]​

Answers

Answer:

Approximately [tex]72.9\; \rm m[/tex], assuming that the rocket had no propulsion onboard, and that air resistance on the rocket is negligible.

Explanation:

Initial velocity of this rocket: [tex]u = 27\; \rm m\cdot s^{-1}[/tex].

When the rocket is at its maximum height, the velocity of the rocket would be equal to [tex]0[/tex]. That is: [tex]v = 0\; \rm m \cdot s^{-1}[/tex].  

The acceleration of the rocket (because of gravity) is constantly downwards, with a value of [tex]a = -g = -10\; \rm m \cdot s^{-2}[/tex].

Let [tex]x[/tex] denote the distance that the rocket travelled from the launch site to the place where it attained maximum height. The following equation would relate [tex]x \![/tex] to [tex]u[/tex], [tex]v[/tex], and [tex]a[/tex]:

[tex]\displaystyle x = \frac{v^2 - u^2}{2\, a}[/tex].

Apply this equation to find the value of [tex]x[/tex]:

[tex]\begin{aligned} x &= \frac{v^2 - u^2}{2\, a} \\ &= \frac{\left(0\; \rm m\cdot s^{-1}\right)^{2} - \left(27\; \rm m \cdot s^{-1}\right)^{2}}{2 \times 10\; \rm m \cdot s^{-2}} = 36.45\; \rm m\end{aligned}[/tex].

In other words, the maximum height that this rocket attained would be [tex]36.45\; \rm m[/tex].

Again, assume that the air resistance on this rocket is negligible. The rocket would return to the ground along the same path, and would cover a total distance of [tex]2\times 36.45\; \rm m = 72.9\; \rm m[/tex].

is the number of paper clips in step 2 the same as the number of paper clips in step 3? why do/don't you think so?​

Answers

We can’t see steps two or three so there isn’t a way to give you the answer that you need

The number of paper clips in step 2 is the same as the number of paper clips in step 3 is a true statement, as the mass is the same for both.

What is mass?

It is possible to define every mechanical quantity in terms of mass, length, and time. The SI unit for mass, denoted by the letter m, is the kilogram. While mass is typically thought of as an immutable feature of an item, relativistic mass must be taken into account when traveling at speeds close to the speed of light.

Given:

The mas of the paper clips are the same,

Assume the number of clips in step two is x and the mass is m, the mass in the third step is the same as in step 2,

Thus, the number of clips = Total mass of paper clip / mass of one clip,

The number of clips = m / x

As we can see, if the mass is equal, then the number of clips will also be equal.

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2
Type the correct answer in the box
A car has a mass of 1,000 kilograms. The weight of the car is
nenors. Use g*98 Nike for granty
Reset
Ben

Answers

Answer:

Weight = 9800Newton

Explanation:

Given the following data;

Mass of car = 1000kg

Acceleration due to gravity = 9.8m/s²

To find the weight of the car;

Weight is given by the formula;

Weight = mass * acceleration due to gravity

Substituting into the equation, we have;

Weight = 1000*9.8

Weight = 9800Newton

Wave Properties
With the help of their science teacher, Kaden and Mariam made a machine that can move a slinky back and forth. This motion
creates a fast-moving wave in the slinky. The image below is a model of a wave that is generated by the machine. The frequency of
the wave modeled in the image is 4 Hz.
3 m
What is the speed of the wave?
OA. 24 m/s
ОВ.
1.25 m/s
OC.
0.75 m/s
OD
12 m/s

Answers

the wave has a speed of 12 m/s.

Explanation:

Speed is directly proportional to wavelength and frequency. The wave has a frequency of 4 Hz. One Hertz (Hz) is equal to one cycle per second. The image shows that the wave has a wavelength of 3 m. Using the given speed and frequency, the wavelength can be calculated as shown below.

speed= wave length x frequency

speed = 3m x 4Hz

speed = 12m m/6

A female skater with mass 45 kg and velocity 7 m/s leaps into her partner's arms. If her partner is has a mass of 60 kg and a forward velocity of 1.5 m/s, how fast are the two of them going after he catches her?

Please provide an explanation, random answers will be reported thank you.​

Answers

Explanation:

this is the answer for your question further if you have any doubts

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example of unlile parallel forces​

Answers

Answer:

Explanation:

In mechanical engineering, a parallel force system is a situation in which two forces of equal magnitude act in the same direction within the same plane, with the counter force in the middle. An example of this is a see saw.

Forces which are parallel and acting a similar way are called like parallel forces. Like Parallel forces are the forces that are parallel to each other and have the same direction. Unlike parallel forces are the forces that parallel yet have directions inverse to each other.

when the parallel force system is a situation in which two forces of equal magnitude act in the same direction within the same plane, Two forces that are parallel can either be in the same direction or in opposite directions.

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Identifying Applications of Electromagnetic Waves
Quick
Check
Match the electromagnetic wave with its application.
ultraviolet waves
disruption of DNA production in bacteria
and viruses
gamma rays
destruction of cancer cells
X-rays
diagnosis of illnesses through medical
imaging

Answers

Answer:

gamma ray-destruction of cancer cells

Ultraviolet wave-disruption of DNA

X-ray-diagnosis of illnesses through medical

Explanation: on edg

Answer:

Here

Explanation:


Usain Bolt runs at 200 meters in 20.0 seconds. How fast does he run? speed = distance / time

Answers

Answer:

22.369363 mi/h

Explanation:

Average Speed Calculation - suppose we want to calculate Usain Bolt's average speed during his world record winning 100 m sprint race in Berlin on August 16, 2009. What do we know?

We want to calculate Bolt's average speed

The distance was, of course, 100 meters

Bolt ran the distance in 9.58 seconds.

Bolt ran 11.42 yards per second during the race. Setting meters per second, you get 10.44 mp/s; miles per hour - 23.35 mph; kilometers per hour - 37.58 km/h; etc.

Travel Time Calculation - Suppose, you drove 21 miles with an average speed of 45 miles per hour. How long did you drive?

You traveled 28 minutes.

Distance Calculation - Let's calculate, how many miles you can travel, driving 2 hours and 30 minutes with an average speed of 55 miles per hour?

As you can see, the answer is 137.5 miles or 221.28 kilometers or 119.48 nautical miles, etc.

Assume, V - stands for average speed (velocity), T - stands for traveling time, and D - stands for traveled distance.

Average speed can be calculated by using the formula: V = D/T

The traveled distance can be calculated as D = V*T

Traveling time can be calculated using: T = D/V

Using the formulas remember about the units. For example, if the distance is given in meters and the time is given in seconds, the calculated average speed is given in meters per second. To convert it to other units of measurement, you can use our speed converter. If the distance is given in yards and speed is given in miles per hour, to get time in hours, you HAVE TO convert yards to miles or miles per hour to yards per hour first.

An orbiting satellite experiences no force due to the Earth's
gravity.

Answers

Answer:

false

Explanation:

The statement "An orbiting satellite experiences no force due to the Earth's gravity." is a False statement. This is further explained below.

What is Gravity?

Generally, Gravity is simply defined as the force that pulls items toward the center of a planet or other entity.

In conclusion, an orbiting satellite experiences force due to the Earth's gravity.

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Which of the scientist responsible for cell theory would be the most likely to write a book titled Cells Come from Cells

Answers

Answer:

Rudolf Virchow

Explanation:

popularized the cell theory in an 1855 essay entitled “Cellular Pathology.” (b) The idea that all cells originate from other cells was first published in 1852 by his contemporary and former colleague Robert Remak (1815–1865).

Explanation:

Rudolf Virchow

-Rudolf Virchow would be the most likely to write a book titled 'Cells Come From Cells' because in cell theory he added a point that 'All cells arises from pre-existing cells. ' which means that all cells come from another cells which is as similar as the title of the book

An element carries a_____charge

Answers

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

Answer:

hydrogen sometimes has a charge of zero or (less commonly) -1. Although noble gas atoms almost always carry a charge of zero, these elements do form compounds, which means they can gain or lose electrons and carry a charge.

Explanation:

Where did Ford first see parts made from vanadium steel?​ What properties of this steel impressed Ford? Did Ford need to overcome any problems before going ahead with his plan?

Answers

Explanation:

Historical sources believe that Henry Ford first saw parts made from vanadium steel in Europe which were been used on racing cars and luxurious vehicles.

Ford was impressed due to the fact that Vanadium steel unlike normal steel was cheaper and at the same time stronger and lighter if it was used on automobiles.

a car takes off from rest and covers a distance of 80m on a straight road in 10s. Calculate the magnitude of its acceleration​

Answers

Answer:

The magnitude of the acceleration is 1.6 m/s².

Explanation:

We can find the magnitude of the acceleration by using the following equation:

[tex] x_{f} = x_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]

Where:

[tex] x_{f}[/tex]: is the final position = 80 m

[tex] x_{0[/tex]: is the initial position = 0

[tex] v_{0}[/tex]: is the initial speed = 0 (it starts from rest)

a: is the acceleration =?

t: is the time = 10 s

Hence, the acceleration is:

[tex] a = \frac{2x_{f}}{t^{2}} = \frac{2*80 m}{(10 s)^{2}} = 1.6 m/s^{2} [/tex]

Therefore, the magnitude of the acceleration is 1.6 m/s².

I hope it helps you!          

pls help i’ll give brainliest if you give a correct answer!!

Answers

Answer:

South ....................

Answer:

South ;)

Explanation:

I just did it .

what is the unit scientist use to measure energy?

Answers

answer:

scientists use a measurement called BTU to measure energy

What is potential energy?

Answers

the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors

Which of the following would decrease the overall force felt between two charges the most?

Question 9 options:
A. Doubling the charge on the first object
B. Doubling the charge on the second object
C. Doubling the distance between the charges

If one charge is tripled and the other is cut in half, what happens to electric force?

Question 10 options:
A. It is decreased by 10 times the original force
B. It is increased by 1.5 times the original force
C. It is increased by 10 times the original force
D. It is decreased by 1.5 times the original force

Answers

Doubling the distance between the charges would decrease the overall force felt between two charges the most. The force felt between two charges is inversely proportional to the square of the distance.

What is Columb's law?

The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

[tex]\rm F= \frac{Kq_1q_2}{r^2}[/tex]

The force felt between two charges is inversely proportional to the square of the distance.

Doubling the distance between the charges. The force felt between two charges is decreased 4 times the previous force.

Doubling the distance between the charges would decrease the overall force felt between two charges, the most.

Hence, option C is correct.

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File Is Attached To The Question

Answers

1. Graph A matches description 2 because the line is straight and travelling upwards at a constant speed (positive, constant slope).
2. Graph B matches description 4 because the line is flipped, travelling the opposite direction at a constant speed (represents the car turning around and driving the other way compared to graph A)
3. Graph C matches description 1 because the line is horizontal and is not moving (when the line is horizontal and remains constant, the object is not accelerating, it is stationary)
4. Graph D matches description 3 because of the way the line moves on the graph- accelerates and then starts to flow more horizontally, not accelerating as quickly anymore and remaining at a lower speed.

What is the volume of the water in the graduated cylinder gizmo Student Volume Lab Sheet (cm3 and mL)

Answers

Answer:

The volume of water in the graduated cylinder will be equal to the calculated volume of the sphere.

Explanation:

The volume of solid objects can be measured by completely immersing these solids in an overflow faucet filled to brim with a liquid in which the solid does not dissolve. This is known as the displacement method. When water is used, it is known as water displacement method.

In the Volume Lab Sheet, a sphere whose volume has been pre-calculated is immersed in the overflow faucet containing water. The displaced water is collected in a beaker and the volume is obtained using a 50 mL measuring cylinder.

The volume of a  sphere is calculated using the following formula:

Vsphere =  4πr³/ 3

The symbol π represents the number pi, which is about 3.14. The letter r stands for the  radius of the sphere, which is the distance from the center of a sphere to its surface. The  radius is exactly half of the diameter, which is the distance across the sphere through its center.

The volume of the water in the measuring cylinder is found to be equal to the calculated volume of the sphere. This is because an object immersed completely in a liquid displaces a volume of liquid equal to its own volume.

in root pass welding, that electrode we are going to use?​

Answers

Answer:

The root pass is made with a 5/32” (4.0mm) diameter electrode. A cellulosic electrode (E-XX10) is being used. The root pass is welded with reverse (DC+) polarity.

Explanation:

In root pass welding, that electrode we are going to use cellulosic electrode (E-XX10).

What is root pass welding?

Short arc welding is commonly used for root pass welding to prevent blow through and overheating at the weld joint. Because there is less drooping and suck back, short arc welding is also commonly used on root pass joints.

The first pass in any welding process that combines two pieces or members into one structure is referred to as the root pass.

Subsequent passes raise the weld depth to the desired thickness, resulting in the required strength. The first pass usually serves as the foundation for subsequent filler passes.

A 5/32" (4.0mm) diameter electrode is used for the root pass. A cellulosic electrode (E-XX10) is being used. The root pass is welded with reverse (DC+) polarity.

Thus, cellulosic electrode (E-XX10) for this.

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An object can have forces acting upon it, but might not accelerate

True
or
False?

Answers

Answer:

true

Explanation:

if you apply force to the top of a square it will not move

One scientist suggests that out of the different possible locations, they should design the model and build it at the equator recieves the most intense solar radiation. Which if the following is the most appropriate critique for the scientist's suggestion?
A. Earth's equator is not hot enough to simulate the Martian daytime.
B. The high mountain top gets the same amount of radiation as the equator, but with atmospheric conditions that are more similar to Mars.
C. The equator has deserts that are actually too dry compared to Mars.
D. The Antarctica has the same nighttime temperature as Mars, but with a similar amount of ice compared to the equator.​

Answers

Answer:

B.

I think.

Explanation:

Mars doesn't have that much of an atmosphere!

Have a great day!

A 5000ton frieight is moving at a speed of 10mph, next to it a 3250lb Ferrari at a speed of 250mph. Both hit the break, but who stops first?

Answers

Answer:

Ferrari would stop first.

Explanation:

The momentum of a moving body is given as:

momentum, P = mass of the body x its velocity

i. For the Freight,

mass = 5000 tons = 4535924 kg

speed = 10 mph  = 4.4704 m/s

P = mv

  = 4535924 x 4.4704

  = 20.28 x [tex]10^{6}[/tex]

P = 20.28 x [tex]10^{6}[/tex] kgm/s

ii. For the Ferrari,

mass = 3250 lb = 1474.175 kg

speed = 250 mph = 111.76 m/s

P = mv

   = 1474.175 x 111.76

   = 16.48 x [tex]10^{4}[/tex]

P = 16.48 x [tex]10^{4}[/tex] kgm/s

Comparing the momentum of the two objects, the Ferrari would stop fist when break is applied.

How does an atom change if all of its electrons are removed?

Answers

Answer: If all the electrons of an atom are removed, it will change to become a positively charged ion called a cation.

Explanation:

Answer:

The atom becomes positively charged.

Explanation:

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A 64.0-kg skier starts from rest at the top of a ski slope of height 62.0 m.A)If frictional forces do -1.10104 J of work on her as she descends, how fast is she going at the bottom of the slope?Take free fall acceleration to be g = 9.80 m/s^2. A Local Area Network (LAN) uses Category 6 cabling. An issue with a connection results in a network link degradation and only one device can communicate at a time. What is the connection operating at?Full DuplexHalf DuplexSimplexPartial A vortex and a uniform flow are superposed. These elements are described by: vortex: u, = 0 Ug = -40/ uniform flow: u = 15 V = 40 What is the x-component of the resulting velocity V at the point (7,0) =(2,30)? each parking spot is 8 feet wide a parking lot has 24 parking spot side by side, what is the the width (measured yard) of the parking lot Construct a single state machine C representing the composition. Which states of the composition are unreachable?input: a: pure output: b: pure a alb a/b a/ input: b: pure output: c: pure -b/c b/c 16 b b/ s1 52 $4 B the estimated change in mean salary (in thousands of dollars) as a result of spending an extra hour per day studying is 1) $979.5. O2) $0.9795. 3) $335.0473 4) -1.8940. (Figure 1) shows two different situations where three forces of equal magnitude are exerted on a square board hanging on a wall, supported by a nail. Determine the sign of the total torque that the three forces exert on the board in case (a). positivenegativetotal torque is zeroDetermine the sign of the total torque that the three forces exert on the board in case (b). positivenegativetotal torque is zero whats makes family and the story called mother and daughter According to the film, how does the Ku Klux Klan connect to Forrest Gump? Who are the KKK? On the map, the grocery store is 2 inches away from the library. The actual distance is 1.5 miles. The same map shows that the movie theater is 20 inches from the school.What is the actual distance from the movie theater to the school, rounded to the nearest mile?A: 15B:27C:30D:60 one way to measure the rate of an enzymatic reaction is to measure the loss of ______________ over time. 1. consider an asset that provides the same return no matter what economic state occurs. what would be the standard deviation (or risk) of this asset? explain. if, for a particular process, h=54 kjmol and s=312 jmol k, the process will be:' evaluate the line integral cfd r where f=4sinx,5cosy,10xz and c is the path given by r(t)=(t3,t2,2t) for 0t1.CFd r= trace algorithm 4 when it is given m = 5, n = 11, and b = 3 as input. that is, show all the steps algorithm 4 uses to find 311mod 5. Check the statements about light-independent reactions in photosynthesis that are true.Light-independent reactions requires carbon dioxide (CO2).Light-independent reactions occur in the thylakoid membrane.Light-independent reactions involve the splitting of water molecules.Light-independent reactions produce carbohydrates T/F. A leaders action plays an insignificant part in whether the leader is ethical or unethical. maximize 3x + y subject to x + y + u. = 1. 2x + y+. +v = 4 x, y, u, v 0. example 1 for what values of x is the series [infinity] n!x4n n = 0 convergent? solution we use the ratio test. if we let an, as usual, denote the nth term of the series, then an = n!x4n. if x 0, we have Light of wavelength 680 nm falls on two slits and produces an interference pattern in which the third order bright red fringe is 38 mm from the central fringe on a screen 2.8 m away. what is the separation of the two slits?