Find the mass of a sample of water if its temperature dropped 24.8 °C when it lost 870 J of
heat. (Remember that specific heat capacity of water 4200 J/kg °C)

Answers

Answer 1

Answer:

8.35 ×[tex]10^{-3}[/tex] kg

Explanation:

Remember the formula for heat:

[tex]Q=mc\Delta T[/tex]

You just need to solve for m, doing so you're left with:

[tex]m=\dfrac{Q}{c\Delta T}[/tex]

Replace the variables with numbers and that's it.

Answer 2

The mass of a sample of water is 0.841 kg.

What is specific heat?

Specific heat is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or Kelvin). It is a characteristic property of a substance that reflects its ability to store and release thermal energy.

Different substances have different specific heat capacities, depending on their chemical composition and physical properties. For example, water has a high specific heat capacity of 4,200 joules per kilogram per degree Celsius (J/kg°C), which means that it takes a large amount of heat energy to raise the temperature of water by one degree Celsius. In contrast, metals such as copper and aluminum have much lower specific heat capacities, which means that they heat up and cool down more quickly than water when subjected to the same amount of heat energy.

The specific heat of a substance can be measured experimentally using calorimetry, which involves measuring the amount of heat energy absorbed or released by a substance as it undergoes a change in temperature. The specific heat of a substance is an important parameter in many fields of science and engineering, including thermodynamics, materials science, and environmental science.

Here in the Question,

We know the  formula:

Q = mcΔT

where:

Q = amount of heat lost by the sample of water, which is -870 J (negative because heat is lost)

m = mass of the sample of water, which is what we need to find

c = specific heat capacity of water, which is 4200 J/kg °C

ΔT = change in temperature, which is -24.8 °C (negative because temperature dropped)

Substituting the values, we get:

-870 J = m(4200 J/kg °C)(-24.8 °C)

Simplifying, we get:

m = -870 J / (4200 J/kg °C × -24.8 °C)

m = 0.841 kg

Therefore, the mass of the sample of water is 0.841 kg.

To learn about latent heat click:

https://brainly.com/question/30762921

#SPJ2


Related Questions

give two examples of contact force and non contact force

Answers

Answer:

Explanation:

The two examples of contact forces are frictional force and applied force. The two examples of noncontact forces are gravitational force and magnetic force.

True or false? the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.

Answers

True, the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.

What is electric field?

Electric field is the region of space at which electric force is felt.

E = kq/r²

where;

r is the distance of the charge

at infinite plane, r → ∞, and E = 0

Thus, the electric field produced by a uniform, infinite plane of charge does not depend on the distance from the plane.

Learn more about electric field here: https://brainly.com/question/14372859

#SPJ1

A car initially traveling at 15.0 m/s accelerates at a constant rate of 4.50 m/s2 over a distance of 45.0 m. How long does it take the car to cover this distance? Show all work leading to the answer including the data, equation, substitution and the final answer with units for full credit.

Answers

Answer:

2.24 seconds

Explanation:

xf = xo + vo t + 1/2 at^2

45 = 0 + 15 t  + 1/2 (4.5) t^2

   2.25 t^2 + 15t - 45 = 0              Quadratic formula shows  t = 2.24 seconds

The car takes approximately 2.25 seconds to cover a distance of 45.0 meters under the given conditions of constant acceleration.

Given data:

Initial velocity (u) = 15.0 m/s

Acceleration (a) = 4.50 m/s²

Distance (s) = 45.0 m

We can use the kinematic equation to solve for time (t) when the car covers a certain distance under constant acceleration:

S = ut + 1/2at²

Where:

s = distance

u = initial velocity

a = acceleration

t = time

Plugging in the given values:

45.0 = 15.0t + 1/2 m/s²t²

2.25t² +15t - 45 = 0

t = 2.25sec and -8.92sec

Since time cannot be negative in this context, we discard the negative solution.

To know more about distance

https://brainly.com/question/27914071

#SPJ3

write a beta decay equation for the
transmutation of a radioactive isotope of Rutherfordium, which has 104 protons
and 183 neutrons.
PLS HELP ASAP!!!!

Answers

The beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has been explained above will be,[tex]\rm Re_{104}^{287} + \beta_0^{-1} \rightarrow Re_{104}^{286}[/tex]  

What is the rate of decay?

The reduction in the number of radionuclides per unit time is the rate of decay.

The beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has 104 protons and 183 neutrons.

Atomic weight = 104+183 = 287

Atomic number  = 104

The beta decay equation is;

[tex]\rm Re_{104}^{287} + \beta_0^{-1} \rightarrow Re_{104}^{286}[/tex]

Hence the beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has been explained above.

To learn more about the rate of decay refer to the link;

https://brainly.com/question/14486631

#SPJ1

the mechanical advantage of a simple machine is 3 and its velocity ratio is 4 find its efficiency ​

Answers

Answer:

75%

Explanation:

Efficiency=MA/VR*100

=3/4*100

=0.75*100

=75%

which of the following would increase​

Answers

Answer:

1 and 3

Explanation:

1 and 3  

Increasing coils increases strength

   COOLING the wire would increase current flow and strength of magnet

Adding an iron core will definitely increase the strength of the electromagnet

(1) Increasing the number of coils ()

a ball is thrown upward from the ground with an initial velocity of 50m/s. what is the total time spent by the ball in the air (g=10m/s2)​

Answers

Answer:

[tex]\fbox {5 seconds}[/tex]

Explanation:

The formula which is used here :

[tex]\fbox {v = u + at}[/tex]

[tex]\longrightarrow \textsf {v : final velocity}[/tex]

[tex]\longrightarrow \textsf {u : initial velocity}[/tex]

[tex]\longrightarrow \textsf {a : acceleration}[/tex]

[tex]\longrightarrow \textsf {t : time taken}[/tex]

Solving :

v = u + at

0 = 50 + (-10)t

10t = 50

t = 5 seconds

Newton's second law of motion states that Choose one: A. the force of gravity is proportional to the masses of the two objects and the inverse of the square of the distance. B. the acceleration of an object is proportional to the net force acting on it. C. objects have inertia. D. every action has an equal and opposite reaction.

Answers

Answer:

B

Explanation:

Which action can humans take to reduce wave erosion?

build drainage systems
build houses near coastlines
build breakwaters in the ocean
reduce vegetation along coastlines

Answers

The action that  humans can take to reduce wave erosion is to build breakwaters in the ocean.

What is erosion?

The term erosion has to do with the washing away of top soil either by water or by wind. The control of erosion is a very important soil conservation effort.

Hence, the action that  humans can take to reduce wave erosion is to build breakwaters in the ocean.

Learn more about erosion:https://brainly.com/question/3852201?

#SPJ1

Answer: (C) build breakwaters in the ocean

Explanation: Got it on edge

Please help: when lorenzo was growing up, his family did not have access to health care. now that he is a father and has access to health care through his work, he wants to make sure he does all he can to promote the health of his own children. how will access to health care help promote a healthier start in his children's lives? how will this promotion of health affect disease prevention for these children? why is it important for lorenzo to establish and implement health maintenance for his family members of all ages? in what ways can he access health services for his entire family?

Answers

Answer:

first answer:He can promote healthier start in the children's life by trying to avoid what he encounter when he has no access to health care.

5. Calculate the area if the force is 368N and the pressure is 28Pa..

Answers

The area would be 13.1429 Meter².

Answer:

[tex]\boxed {Area = 13.14 m^{2}}[/tex]

Explanation:

Formula applied :

[tex]\boxed {Area = \frac{Pressure}{Force}}[/tex]

Given :

Force = 368 NPressure = 28 Pa

Solving :

Area = 368/28Area = 92/7Area = 13.14 m² (approx.)

Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about the salt sample that Gerry is looking at?

The atoms have spread out from each other.
The atoms are sliding past each other.
The atoms have no particular pattern.
The atoms are vibrating in place.

Answers

i know it is c

here is the answer

VR is always greater than MA. why?

Answers

Answer:

The mechanical advantage (M.A) of a real machine is always less than its velocity ratio(V.R) because mechanical advantage decreases due to the friction and weight of moving parts of the machine whereas the velocity ratio remains constant.

compared to other spiral galaxies, the milky way is ____.

Answers

The Milky Way, a member of the "Local Group," is different than other galaxies in the universe. First, it is brighter than most galaxies that we have been able to see. Second, the Milky Way is a barred spiral galaxy; unlike typical spiral galaxies, barred spiral galaxies have flat discs in their centers.

Answer:

The Milky Way Galaxy, is a spiral galaxy, meaning that there are multiple arms spiraling in toward the middle of the galaxy. Are there any other galaxies in the universe shaped like the Milky Way Galaxy?

define density and give its SI unit​

Answers

Answer:

Density is defined as mass per unit volume. its SI unit is: kg/m³

Explanation:

Answer:

Density is defined as mass per unit volume. its SI unit is: kg/m³

Explanation:

from answer above

What is the main difference between a longitudinal wave and a transverse wave? a longitudinal wave always travels faster than a transverse wave. a longitudinal wave does not need a medium to travel through. a transverse wave is made of particles that move perpendicular to the motion of the wave. a transverse wave always carries more energy so that it can travel through empty space.

Answers

In a longitudinal wave, the propagation of energy is in the direction of the motion, while in a transverse wave the propagation of energy is perpendicular to the direction of motion.

What is longitudinal wave and Transverse wave?

Longitudinal wave is a wave which moves in the direction from where it was started. It has a compression (increased intensity) of the medium particles and a rarefaction ( reduced intensity).

Transverse wave is wave that travels perpendicular or at right angles to the direction from where it was started.

The main differences between longitudinal wave and Transverse wave are:

Transverse wave, the medium moves vertically up and down while in the longitudinal wave, the medium moves left to right.Transverse wave has a crest and a trough while the longitudinal waves have a compression and rarefaction.Transverse waves don't have a pressure variation , longitudinal waves have a pressure variation.Transverse waves can only be propagated in solids and on the surfaces of liquids, Longitudinal waves can be propagated in solids, liquids and gases.Transverse waves don't change in density throughout the medium, longitudinal waves have a change in density throughout the medium.

Therefore,

The propagation of energy is in the direction of the motion, while in a transverse wave the propagation of energy is perpendicular to the direction of motion.

Learn more about longitudinal wave and Transverse wave here:

https://brainly.com/question/3513157

#SPJ1

Question 16 of 25
Which of the following best describes an alternating current?
A. A circuit that has both series and parallel components
B. Charge that moves in a single direction
C. Charge that jiggles back and forth very quickly
D. A circuit that has only series or only parallel components
SUBMIT

Answers

The answer is B because trust me

Answer:

it is c

Explanation: i just did it

A 1-kg block starts sliding up a 30o inclined plane with an initial velocity of 4.00 m/s. How far will the block travel before coming to rest, if the surface is rough and the coefficient of kinetic friction between the block and the ramp is 0.2.

Answers

The block will travel 2.038 m before stopping. Newton's third equation of motion is applied in the given problem.

What is the friction force?

It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).

it is defined as the product of the coefficient of friction and normal reaction.

On resolving the given force and acceleration. Mathematically in the different components and balancing the equation gets.Components in the x-direction.

From Newton's third equation of motion;

v²=u²+2as

0 =u²+2(-a)s

u²=2as

u²=2×(2×μg)s

4.00 m/sec = √2×(2 ×0.2 ×9.81 s

16 = 7.848 s

s = 2.038 m

Hence, the block will travel 2.038 m before stopping.

To learn more about the friction force refer to the link;

https://brainly.com/question/1714663

#SPJ1

two examples of hydraulic brake​

Answers

Answer:

1). Brake pedal or lever

2). A pushrod also called an actuating rod

When two or more capacitors are connected in series across a potential difference.

Answers

Explanation:

1. the potential difference across the combination is the algebraic sum of yhe potential differences across the individual capacitors

2. the equivent capacitance of the combination is less than the capacitance of any of the capacitors..

Perform the following mathematical operation and report answer to the correct number of significant figures 143.6 divided by 21.2

Answers

The answer to the correct number of significant figures is 6.774.

What is quotient?

When a number(big) divided smaller number, the answer obtained greater than zero is called a quotient.

Divide 143.6 ÷ 21.2

143.6/21.2 = 1436/212

                  =6.77358

The quotient is rounded to three significant figures after decimal

143.6 ÷ 21.2 = 6.774

Thus, the answer to the correct number of significant figures is 6.774

Learn more about quotient

https://brainly.com/question/27796160

#SPJ1

two conducting spheres are touched together​

Answers

Answer:

I think its either A or B. I’m not really sure, don’t listen to me. Read my explanation and it should help you.

Explanation:

When the two conducting spheres are brought together to touch, it is as though they become one single big conductor and the total charge of the two spheres spreads out across the whole surface of the touching spheres. When the spheres are moved apart again, each one is left with half of the total original charge…

X and Y are two identical conducting spheres separated by a distance d. X has a charge of +6µC and Y has a charge of -2µC. The electric force between them is +F (i.e. attractive). The spheres are touched together and are then returned to their original separation d. What is the new value of the force between them? Any help is greatly appreciated. I assumed that since the net charge should remain the same after, there would be no change in the value of the force, but the answer scheme gives the answer as -F/3…

Assuming a current is flowing, what increases the strength of the magnetic field of a coiled electrical wire?.

Answers

Answer:The amount of current flowing

Explanation:this derives from amperes law of maxwell’s equations. It’s easiest to see in differential form. The curl of the magnetic field is proportional to the current plus the change (time derivative) in electric field

I finished all my other questions but i don't know how to do this one. could someone help me? I added a lot of points because I know this is pretty complicated.

Answers

Explanation:

hope it will help you understand, if you have any questions just let me know.

Which of the following is an example of an electromagnetic wave?

Sound
Ocean waves
Seismic waves
Red light

Answers

Answer:

red light light is an electromagnetic wave thats whyy

hope it helped

Explanation:

when you rub neutral objects​

Answers

electrons can be knocked loose from one object and picked up by the other. The object that gains electrons becomes negatively charged, while the object that loses electrons becomes positively charged.

b gained electrons

what is the magnification of a mirror that ​

Answers

Answer:

1.1111111

Explanation:

The formula for magnification (M) as already given is:

M= V/U

Where V is anything that has to do with image . such as image height or image distance And U is anything that has to do with object such as object height or object distance .

Image height (V) = 2m

Object height(U) = 1.8m

M = V/U

M= 2/1.8

M= 1.111111

I turn a glass upside down, trap the air in it by putting it in water, and then i take the glass down to 10 metres/33 feet. The air space would

Answers

The air space would be half the size it was at the surface.

What is airspace?

It should be noted that airspace means the portion of the atmosphere controlled by a country that's above its territory.

Based on the information given, the The air space would be half the size it was at the surface.

Learn more about air on:

brainly.com/question/636295

#SPJ12

hello i need help with this!!​

Answers

Answer:

Yes

Explanation:

If lamp A burnt out there would still be a wire above it that connects lamp B and C to the power source

A racing car has a mass of 1910 kg. The acceleration of gravity is 9. 8 m/s 2. What is its kinetic energy if it has a speed of 109 km/h? answer in units of j.

Answers

KE = 0.5 x m x v²
Steps:
= 0.5 x 1910 x 9.8²
= 0.5 x 1910 x 96.04
= 91718.2
Other Questions
How many molesare in a bag of CaCl that weighs 18.14kg Which type of incident would not be necessarey to report to the risk manager Mark Novak is an ambulatory inpatient who needs to urinate while in the imaging department. His chart states that a urine specimen is needed. You should: Part A: Describe two types of transformations that can be used to transform f(x) to g(x). (2 polnts)Part B: Solve for k in each type of transformation. (4 points)Part C: Write an equation for each type of transformation that can be used to transform f(x) to g(x). (4 points) Philippa threw some darts. Her minimum score was 5 andher maximum score was 53. What was the range of herscores?Min = 5Max = 53Range = ? a story that ends with, I suddenly woke up only to realize that that it was a dream how to use boolean to check if math answer is correct java The recommended amount of vegetables in the Healthy U.S.-Style Eating Pattern at the 2,000-calorie level is _____ cup-equivalents of vegetables per day. Given: f(a)= a +a and g(a) = a -1 Find: (fog)(a) If Scott started by asking 3 friends to sponsor him and each of those friends askedthree friends, how many sponsors would he have on the 4th week 7. It is a --- lie.8. The --- tidings were a heavy blow to the old man.9. Here is a rupee: pay the fare and keep the --- money.10. His reading is of a very --- range.11. The injured man wants --- advice.12. You cannot have it --- ways.13. India expects --- man to do his duty.14. The --- bird catches the worm.15. Have you any --- reason to give?16. ---anxiety has undermined his health.17. There were riots in --- places.18. An --- man will not reason calmly.19. He stands --- feet in his stockings.20. Nelson won for himself --- fame.21. I have no --- cash.22. He always walks with a --- step.23. --- errors are not easily corrected.lining.24. Every cloud has a ---25. He was a man of --- ambition.26. He was listened to in --- silence.GAVEmillio after the terrorist attacks, what other targets did investigators discover? PLEASE HELP ME!!!!!!!!! tu blank ( tengas, prefires, y ir) leer una novelas help me please what does he want to eat A revised red, white and blue flag honoring juneteenth was introduced in 2000. What symbol is at the center of the flag?. hii guys please answer this question if two -1 and 2 are two zeroes of the polynomial 2x3- x2 - 5x - 2, find its third zero El mdico me examinar la garganta La ltima frase nos desvela el suceso que est ocurriendo en el texto qu gran suceso es ese The word profession meansQuestion 27 options:to testify on behalf of something.a course or principle of action adopted.the actual application or use of an idea, belief, or method.a fundamental truth or proposition.