If a 2kg metal slug is heated with 1275J of energy which raises its temperature 15K, what is the metal's specific heat capacity?

Answers

Answer 1

Answer:

42.5J/kgk

Just use the formula

C = Q/m x change in temp


Related Questions

A car starts from rest and accelerates uniformly at a rate of 8.0 meter per second squared for 1.0 meters. At the end of this time interval, the car's final velocity is ___ meters per second.

Answers

Answer:

The answer is [tex]v=4ms^{-1}[/tex]

Explanation:

Given,

[tex]u=0\,ms^{-1}\\a=8\,ms^{-2}\\s=1\,m\\\\v=?[/tex]

We know,

∴[tex]v^{2}=u^{2} +2as\\=>v^{2} =0^{2} +2*8*1\\=>v^{2}=16\\v=4\,ms^{-1}[/tex]

Hope you have understood this....

pls mark my answer as the brainliest

help me please i dont understand

Answers

Answer:

inertia is due to friction

How many marbles would fit in beta Centauri?

Answers

Answer:

dude if any body could answer that they deserve a Nobel prize because the formula to solve that would require the exact measurement of hadar or as commonly known beta centauri

Explanation:

4:36 PM
How high can a human throw a ball if he can throw it with initial velocity 90 kph

Answers

Answer:

90 km/hr= 90000/3600=25 m/s initial velocity

-25/ 2 (-4.9)= 2.551 secs

h(2.551)= -4.9 (2.551)² + 25(2.551)=-31.8872449+63.775 = 31.8m

The distance would be 31.8 meters, also that person will have sore arm.

Class 9 SCIENCE
ch 2 Is matter around us pure
Question -
what you mean by crystallization? Give example.​

Answers

Answer:

Crystallization is defined as a process by which a chemical is converted from a liquid solution into a solid crystalline state.

Which characteristic accounts for the fact that red lights in dark rooms and DO NOT expose negatives during developing?

Answers

Answer:

the long wavelength and not focused on the negatives.

3. Write any two differences between contact force and not contact force with examples.​

Answers

Explanation:

Contact force includes applied force, the normal force, the tension and the frictional force. Non-contact force includes electro-magnetic force, the gravitational force and the electrostatic force. For Example, applied force is required to kick the ball else the ball would not move.

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True or false? Balanced forces cause a change in motion. T/F
How do you know this?
Help me, it's due soon!

Answers

Balanced forces do not change the motion of an object, Because the forces are the same size and acting in opposite directions.

Answer:

Balanced forces do not change the motion of an object. The motion of an object will not change if the forces pushing or pulling the object are balanced. An object that is sitting still will stay still if the forces acting on it are balanced.

When 4050 joules of heat were applied to 150g of aluminum, the final temperature was 50 degree Celsius. What was the initial temperature? Take specific heat capacity of aluminum as 900J/kg degree Celsius.

Answers

Answer:

[tex]\boxed {\boxed {\sf 20 \textdegree C}}[/tex]

Explanation:

We are asked to find the initial temperature of aluminum. We will use the following formula.

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

Where q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature, which is also the difference between the final and initial temperature.

[tex]q= mc (T_f-T_i)[/tex]

We know the heat energy applied is 4050 Joules, the mass is 150 grams, the final temperature is 50 degrees Celsius and the specific heat is 900 Joules per kilogram degree Celsius.

We must convert the mass to kilograms because the specific heat is in kilograms. 1 kilogram contains 1000 grams.

[tex]\frac { 1 \ kg }{1000 g }[/tex][tex]150 \ g *\frac{ 1 \ kg }{1000 g } = 150 * \frac {1}{1000} \ kg = 0.150 \ kg[/tex]

Substitute all the known values into the formula.

q= 4050 J m= 0.150 kg c = 900 J/g °C [tex]T_f[/tex]= 50°C

[tex]4050 \ J = (0.150 \ kg )(900 \ J/kg \textdegree C)(50 \textdegree C -T_i)[/tex]

We are solving for the initial temperature, so we must isolate the variable [tex]T_i[/tex]It is being multiplied by 0.150 kilograms and 900 Joules per kilogram degree Celsius. The inverse operation of multiplication is division, so we divide by both values.

[tex]\frac {4050 \ J}{ (0.150 \ kg )(900 \ J/kg \textdegree C)}= \frac{(0.150 \ kg )(900 \ J/kg \textdegree C)(50 \textdegree C -T_i)}{(0.150 \ kg )(900 \ J/kg \textdegree C)}[/tex]

[tex]\frac {4050 \ J}{ (0.150 \ kg )(900 \ J/kg \textdegree C)}=(50 \textdegree C -T_i)}[/tex]

The units of Joules and kilograms cancel.

[tex]\frac {4050 }{ (0.150 )(900 \ \textdegree C)}=(50 \textdegree C -T_i)}[/tex]

[tex]\frac {4050}{135} \textdegree C = (50 \textdegree C -T_i)[/tex]

[tex]30 \textdegree C = (50 \textdegree C -T_i)[/tex]

50 degrees Celsius is being added to [tex]-T_i[/tex]. The inverse operation of addition is subtraction. Subtract 50 degrees Celsius from both sides.

[tex]30 \textdegree C - 50 \textdegree C= 50 \textdegree C - 50 \textdegree C - T_i[/tex]

[tex]-20 \textdegree C = -Ti[/tex]

[tex]T_i[/tex] is being multiplied by -1. The inverse operation of multiplication is division. Divide both sides by -1.

[tex]\frac {-20 \textdegree C}{-1}= \frac{-T_i}{-1}[/tex]

[tex]20 \textdegree C = T_i[/tex]

The initial temperature of the aluminum was 20 degrees Celsius.

A car moves with an average speed of 45 mph. How long does a car take to travel 90 miles?

Answers

Answer:

It took 2 hours

Explanation:

[tex]{ \bf{time = \frac{distance}{speed} }} \\ [/tex]

distance is 90 miles

speed is 45 miles per hour

[tex]t = \frac{90}{45} \\ \\ t = 2 \: h[/tex]

Answer:

2 hours

Explanation:

45 times 2 is 90

34.1 grams / 1.1 mL =

Answers

General formula,

→ 1 mL = 1 gram

The given question is,

→ 34.1 grams / 1.1 mL = ?

According to the formula,

→ 34.1 grams / 1.1 grams

→ 34.1 ÷ 1.1

→ 31 grams

The answer is 31 grams.

10th grade Physical Science.... Help plss

1.) Which option is a negatively charged ion?

A) chloride

b) chlorate

c) chlorite

d) chlorine

2.) When moving across a period from left to right in the periodic table, excluding transition elements, which trend occurs?

a)Valence electrons increase by one.

b)The energy levels increase by one.

c)Valence electrons decrease by one.

d)The energy levels decrease by one.

3.) Which information about an atom can a period number give you?

a)the number of valence electrons it has

b)the ionic charge it forms

c)how many bonds it will make

d)how many energy levels it has

4.) Fluorine has 7 valence electrons. Which charge is its ion likely to have?

a)5+

b)1–

c)5-

d)1+

5.)Which two elements in the list would bond together based on their ionic charges?

a)calcium and potassium

b)potassium and iodine

c)calcium and neon

d)potassium and neon


Use the list to answer the question.


potassium, Group 1

calcium, Group 2

iodine, Group 17

neon, Group 18

Answers

The periodic table is an arrangement of elements into groups and periods based on their periodic properties. Elements a placed in these groups and periods.

1) A negatively charged ion is chloride

2) Moving from left to right, valence electrons increase by one.

3) The period number gives information about how many energy levels it has

4) Fluorine has a charge of 1–

5) Potassium and iodine form an ionic bond.

In the periodic table, elements are arranged in groups and periods. There are 18 groups and 8 periods.

Chlorine is in group 17, there have seven outermost electrons hence the chlorine atom needs only one more electron in order to attain a stable octet. This is done by accepting one electron to form the negatively charged chloride ion.

As we move from one period to another, one extra electron is added to the outermost shell of elements. Hence, the valence electrons increases by one.

The period to which an element belongs shows you the number of shells or energy levels in the atom of that element.

Fluorine is in group 17. One electron is needed to achieve a stable octet. When an atom accepts one electron, its charge is 1–.

Bonding based on ionic charges occurs between metals and nonmetals. Potassium is a metal of group 1 and iodine is a non metal of group 17 hence they can bond together based on their ionic charges.

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13 The pressure of the atmosphere is 100 000 Pa
a Calculate the force with which the atmosphere presses on the outside of a large window 2.0m
high and 1.25m wide.
bExplain why this force does not break the window.

Answers

Question:-

(A) The pressure of the atmosphere is 100000 Pa Calculate the force with which the atmosphere presses on the outside of a large window 2.0m high and 1.25m wide.

(B) Explain why this force does not break the window.

Answer:-

(A)

As we know

[tex]Formula -> pressure = {force} \times area[/tex]

Given->

Pressure-> 1atm

height-> 2 m

wide -> 1.25 m

Putting value in formula ->

[tex]100000 = force \times(h \times w) \\ 100000= force \times 2 \times 1.25 \\ force = \frac{100000}{2 \times 1.25}\\ force = {4×10000}\\ force = 40000\: newton \: (N)[/tex]

(B) Because atmosphere is present on both sides of the window pane so same force is applied from both sides of the window and as we know force is a vector quantity so according to the vector sum the force got cancelled out and net force becomes zero .

That's why even in presence of this amount of force window glass donot break

a) The force with which the atmosphere presses on the outside of the window  be 3 × 10⁵ Newton.

b) As the atmosphere exerts thus much force on either side of the window, the opposing forces cancel one another out. The window is not broken by this force, therefore.

What is pressure?

It is the ratio between the force being applied and the surface area being applied to. Pressure can be described as: the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.

Given parameters:

The pressure of the atmosphere is 100000 Pa

Height of the large window: h = 2.0 m.

Width of the  large window: d = 1.5 m.

surface area of the window = h×d = 2×1.5 m² = 3.0 m².

Hence,  the force with which the atmosphere presses on the outside of the window = pressure × surface area

= 100000 Pa ×  3.0 m².

= 3 × 10⁵ Newton.

b) As the atmosphere applies this amount of force in both side of the window, each two each an opposite force nullifies each other. So, this force does not break the window.

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plzz can anyone solve this

plzzzz guys tomorrow is my exam ..
plzz​

Answers

Answer:

i hope it helped U

stay safe stay happy

What is the kinetic energy of a bicycle with a mass of 16 kg traveling at a velocity of 5 m/s

Answers

Answer:

200J

Explanation:

K.E=½mv²

K.E=½×16kg×5m/s²

K.E=8kg×25

K.E=200J

After 14.1s, a jogger's displacement is 520m. What is the average velocity in km/h

Answers

The average velocity in km/hr is 132.99km/hr

The first step is to convert 14.1 secs to hours

14.1/3600

= 0.00391 secs

Convert 520 m to km

520/1000

= 0.52 km

Velocity= displacement/time

0.52/0.00391

= 132.99km/hr

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Abishek is a runner. He runs the 100 m sprint
in 10 x 6s. What speed did he travel at?
(in m/s)​

Answers

Answer:

1.67m/s

Explanation:

Total Distance to be travelled by a Runner=100m

Time Taken=10*6s

Speed=Distance/Time

=100/10*6=10/6=1.67m/s

The answer you are looking for is approximately 1.67 m/s.

Solution/Explanation:

Distance Ran: 100 m.

Time ran: 10x6s, or 60s, or one minute.

Speed: Unknown?

Writing out the formula for speed, using distance and time,

S=D/T.

S=Speed.

D=Distance.

T=Time.

Substituting the given values of the variables,

S=100 m/10x6s, or S=100 m/one minute, or S=100 m/60s.

100÷60=1.6667≈1.67.

So, therefore, the final answer is approximately 1.67 m/s.

I hope that this has helped you. Enjoy your day, and take care.

A piano technician slides a Steinway grand piano across a level floor at Carnegie Hall. The piano has a mass of 490 kg.
(a) Draw a free-body diagram, and calculate the normal force supporting the piano.

(b) If the coefficient of static friction between the floor and the piano is 0.35, calculate the minimum amount of force needed to get the piano to move.

(c) Once the piano is moving, a horizontal force of 1.1 x 10²N is necessary to keep it moving at a constant speed. Determine the coefficient of kinetic friction.

Answers

We have that the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

A)  [tex]F_N=4802N[/tex]

B) [tex]F_f=1680.7N[/tex]

C)  [tex]\mu_k=0.23[/tex]

From the question we are told that:

Mass [tex]m=490kg[/tex]

A)

Generally, the equation for normal force  is mathematically given by

[tex]F_N=mg[/tex]

[tex]F_N=(490kg*9.81)[/tex]

[tex]F_N=4802N[/tex]

B)

From the question we are told that:

Coefficient of static friction [tex]\mu=0.35[/tex]

Generally, the equation for Frictional Force  is mathematically given by

[tex]F_f=\mu mg\\\\F_f=4802*0.35[/tex]

[tex]F_f=1680.7N[/tex]

C)

From the question we are told that:

Horizontal force [tex]F_h =1.1 * 10^2 N[/tex]

Generally, the equation for coefficient of kinetic friction  is mathematically given by

[tex]\mu_k=\frac{F_h}{mg}[/tex]

[tex]\mu_k=\frac{1.1 x 10^2}{4802}[/tex]

[tex]\mu_k=0.23[/tex]

Therefore in conclusion

the normal force is given as [tex]F_N=4802N[/tex],while the minimum amount of force needed to get the piano to move to be [tex]F_f=1680.7N[/tex] and

Coefficient of kinetic friction as [tex]\mu_k=0.23[/tex]

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Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. What is her velocity?

Answers

Answer:

45/30

Explanation:

bbsksksbsnbksbsksbs

Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. then her velocity would be 1.5 meters per second

What is momentum?

It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.

Mathematically the formula of the momentum is

P = mv

where P is the momentum of the particle

m is the mass of the particle

v is the velocity by which the particle is moving

As given in the problem Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms

P = 45 Kilogram meters per second

m = 30 Kilograms

By substituting the values of the momentum and the mass in the formula of the momentum

P = mv

45 = 30 ×v

v = 45/30 meters per seconds

v = 1.5 meters per seconds

Thus, Nikki weighs 30 kilograms and moves at a 45 kilogram per the second momentum. subsequently, her velocity would be 1.5 meters per second.

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define physical quantity​

Answers

Answer:

The quantity which can be measured is called physical quantity.

Answer:

Those quantities which can be measured are called physical quantities.

A cyclist travels at 15 m/s during a sprint finish. What is this speed in km/h

Answers

Answer:

54km/hr

Explanation:

Since we have to complete m/s to km/h.

we can simply divide the m/s by (5/18)

so we get 54km/hr

Which types of changes must follow the law of conservation of mass?

Both physical and chemical changes
Neither physical nor chemical changes
Only physical changes
Only chemical changes

Answers

Answer:

Both physical and chemical changes

Answer:

Both physical and chemical changes follow the law since when the system is closed to all transfers of matter and energy, the mass of the system must remain constant over time, irrespective of the state.

Explanation:

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Jan is 1.32 meters tall. What is her height in inches?

Answers

Answer:

51.96 inches

Explanation:

Multiply 1.32 by 39.37

Answer:

52.0 inches

Explanation:

1.32 meters * 39.37  = 51.96 inches ~ 52.0 inches

1.If a wooden cube has length and breadth of 1.5 m each and it is exerting a pressure of 1200 pa. What is it's weight (f)?​

Answers

Explanation:

Explanation:

Pressure is defined as a Force over an

Area.

p=F/A

We can rearrange this to make the Force

the subject

F = p *A

The pressure is given as 1200 Pa.

We know a pascal is 1 Newton / Square

metre = N/m²

The area of a cube will be width * breadth

= 1.5 m * 1.5 m= 2.25 m²

So the force the cube is pushing down

with (its weight) is simply

F = p * A = 1200 N/m² * 2.25 m² = 2700 N

Weight is officialy defined as a force

measured in Newtons, but when we

talk about weight we often give it in

Kilograms (a unit of mass).

To get the weight in units of

Kilogram-force you must divide by the

gravitational acceleration =9.81 m/s²

2700 / 9.81 = 275.23 Kg

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write si units of the following physical quantities volume , potential difference, temperature, electrical resistance​

Answers

Answer:

cubic meter - Volume

Volt - potential difference

kelvin - temperature

ohm - electric resistance

Explanation:

hope it helps.

Mark me as brainliest plz

what are each layer on an atom​

Answers

protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge).

Explanation:

Protons electrons and neutrons

Actividad
1: En general, la dificultad para arrancar electrones aumenta de izquierda a derecha en cada periodo de la tabla periódica. Busca en la tabla periódica potasio (K), calcio (Ca) y uranio (U) y basándote en sus posiciones indica cuál de ellos tendrá una función de trabajo más baja y cuál más alta:


Menor función de trabajo:

Mayor función de trabajo:


2.- La energía de un electrón emitido se mide en electrón-voltios(eV). Un electrón con una energía de 1 eV puede superar un campo eléctrico de 1 voltio. En el simulador, aumenta la tensión hasta que encuentres la tensión más alta que todavía permite a los electrones llegar al amperímetro.


Tensión =


El volaje que has encontrado es igual a la energía de los electrones emitidos en eV.

Answers

La polica and los policio is the same things an i right or wrong I believe so

Is ambition a good or bad thing?

Answers

Answer:

some amount of ambition is good for your motivation but excess ambition is dangerous.

b Write out the following in full:
103 2 x 106 6.92 x 104 1.34 x 102 10
Can somebody help?

Answers

Answer:

b

Explanation:

hi pls answer 11 point pls

Answers

Answer:

the answer is a. a ball is moving towards the camera faster then slower

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