All categories

3 years ago

How much heat is required to warm 122 g of water by 23.0 c?

Physics

2 answers:

Pachacha [2.7K]3 years ago

6 0

Answer: 11745.92 j

Explanation: using heat = mc∆

Where k is mass

C is heat capacity of water = 4.186 j/gc

∆ is temperature

H = 122 × 4.186 × 23

= 11745.92 j

GaryK [48]3 years ago

4 0

122 g * 4,186 (j/g*°c) * 23°c = 11745.916 j

You might be interested in

Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here : 750 J electrical energy i

Charra [1.4K]

Electrical energy is used to run the fan

Here as per given condition 750 J of electrical energy is used to run the fan which is converted into Kinetic energy as 400 J

So here we can see that 350 J of energy is lost against many other type of frictional and resistive loses.

So here we can say that out of 750 J of energy only 400 J is used to run the fan and rest amount of energy is lost against friction.

also we can say that efficiency of this fan will be

$\eta = \frac{Useful}{Total}$

$\eta = \frac{400}{750}$

$\eta = \frac{8}{25}$

3 0

3 years ago

How does the density of water change when: (a) it is heated from 0o

Radda [10]

Answer:

[b] it id heated from 4o

Explanation:

3 0

3 years ago

Sound with a frequency of 1250 Hz leaves a room through a doorway with a width of 1.05 m.At what minimum angle relative to the c

kiruha [24]

Answer:

15.19°, 31.61°, 51.84°

Explanation:

We need to fin the angle for m=1,2,3

We know that the expression for wavelenght is,

$\lambda = \frac{c}{f}$

Substituting,

$\lambda = \frac{344}{1250}$

$\lambda = 0.2752m$

Once we have the wavelenght we can find the angle by the equation of the single slit difraction,

$sin\theta = \frac{m \lambda}{W}$

Where,

W is the width

m is the integer

$\lambda$ the wavelenght

Re-arrange the expression,

$\theta = sin^{-1} \frac{m\lambda}{W}$

For m=1,

$\theta = sin^{-1} \frac{1 (0.2752)}{1.05}= 15.19\°$

For m=2,

$\theta = sin^{-1} \frac{2 (0.2752)}{1.05}= 31.61\°$

For m=3,

$\theta = sin^{-1} \frac{3 (0.2752)}{1.05}= 51.84\°$

The angle of diffraction is directly proportional to the size of the wavelength.

5 0

3 years ago

In 40 words or fewer, summarize the connection between kinetic and thermal energy. PLEASE REPLY

xz_007 [3.2K]

Answer:

Explanation:

kenetic is made for thermal things

8 0

3 years ago

Is it possible to apply the same amount of force and do different amounts of work?

Tamiku [17]

Yes, with simple machines

5 0

3 years ago