1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AlekseyPX
2 years ago
9

What is the temperature increase of 4.0 kg of water when heated by an 800-W immersion heater for 10 min? (cw = 4 186 J/kg⋅°C)

Physics
1 answer:
Llana [10]2 years ago
3 0

Answer:

option C

Explanation:

given,

mass of water = 4 Kg

Water is heated to = 800 W

time of immersion = 10 min

                              = 10 x 60 = 600 s

using equation of specific heat  

Q = m S ΔT

S is the specific heat capacity of water which is equal to 4182 J/kg°C.

and another formula of heat

Q = Pt

now,

P t =  m S ΔT

800 x 600  = 4 x 4182 x ΔT

ΔT = 29° C

temperature increased is equal to ΔT = 29° C

Hence, the correct answer is option C

You might be interested in
A block slides forward 4.73 m while being pulled back by a 39.7 N force at 142° from the direction of motion. How much work does
lubasha [3.4K]

Answer:

work done by the force, W = -147.97 J

Given:

displacement of the box, s = 4.73 m

angle between force and displacement, \theta = 142^{\circ}

Force, F = 39.7 N

Solution:

Work done by the force can be expressed as the dot product of Force, F and displacement 's' is given by:

W = Fscos\theta

W = 39.7\times 4.73\times cos142^{\circ}

W = -147.97 J

where negative sign indicates that work is done on the block

6 0
3 years ago
Is the ratio between the sine of an angle of incidence to the sine of an angle of refraction is called the refractive index?
motikmotik

Answer:

Yes

Explanation:

Yes it is called the refractive index denoted by n

n=sin<i/sin<r

6 0
3 years ago
Read 2 more answers
Light-rail passenger trains that provide transportation within and between cities are capable of modest accelerations. The magni
Mkey [24]
During the first phase of acceleration we have:
v o = 4 m/s;  t = 8 s; v = 13 m/s, a = ?
v = v o + a * t
13 m/s = 4 m / s + a * 8 s
a * 8 s = 9 m/s
a = 9 m/s : 8 s
a = 1.125 m/s²
The final speed:
v = ?;  v o = 13 m/s; a = 1.125 m/s² ;  t = 16 s
v = v o + a * t
v = 13 m/s + 1.125 m/s² * 16 s
v = 13 m/s + 18 m/s = 31 m/s 
3 0
2 years ago
Which state has the most fixed shape?<br> O A. Gas<br> O B. Solid<br> O C. Liquid<br> O D. Plasma
Mrac [35]

Answer: Liquid

“A substance will take on the shape of an open container if it is a Liquid. Explanation: The major state of matter are solid, liquid and gas. Liquid usually have a definite volume.”

3 0
3 years ago
What happens to light when it changes speed?
Brut [27]
Hey there!

When light changes speed, it REFRACTS.
Your answer is going to be option C.

Hope this helps you.
Have a great day!
5 0
3 years ago
Other questions:
  • Willing to give a brainliest!
    6·2 answers
  • The pituitary gland releases chemicals known as?
    8·1 answer
  • How many gallons of water per day does the average American family of 4 use?
    13·2 answers
  • What type of force slows you down as you slide across the floor?
    15·2 answers
  • Why sunlight is not reflected when passed through an electric or magnetic field
    7·2 answers
  • The population of weights for men attending a local health club is normally distributed with a mean of 171-lbs and a standard de
    13·1 answer
  • Which statement is true about vectors? a. All quantities in physics are not vectors. b. A vector may have either magnitude or di
    9·1 answer
  • 100 POINTS!!!
    13·1 answer
  • Which can lead scientists to change a theory that has already been accepted? Check all that apply.
    9·1 answer
  • Which of the following is true for gravitational force?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!