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
natulia [17]
3 years ago
12

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a to

tal of 11 rubs a distance of 7.50 cm each and with a frictional force averaging 71.3 N, what is the temperature increase? The mass of tissue warmed is only 0.100 kg, mostly in the palms and fingers. The specific heat of the tissue is 3500 J/(kg · °C).
Physics
1 answer:
stepan [7]3 years ago
6 0

Answer:

0.168°C

Explanation:

The frictional force between the palms enables rubbing and initiates the heat deposed.

The energy generated per rub is;

The force × distance

Hence we have; 71.3 N×0.0750m

Hence for 11 rubs we have; 11× 71.3 N×0.0750m= 58.82J

Now this heat acquired by the tissue is the same as mass of tissue × specific heat capacity of tissue × temperature rise;

Expressed mathematically as;

58.82=0.100 kg×3500 J/(kg · °C)×∆T

∆T= 58.82/ 0.100 ×3500 =0.168°C

You might be interested in
What do you call the curved upper surface of the water that comely appears when using a graduated cylinder
algol [13]
The curved surface of water is called the meniscus
6 0
3 years ago
Read 2 more answers
Please view attached images. The first one is #2 and the second one is #1.
MakcuM [25]
The proton would be 2 and d a part of 1 then calculate that hope this helped
8 0
2 years ago
A segment of wire carries a current of 25 A along the x axis from x = −2.0 m to x = 0 and then along the y axis from y = 0 to y
Rashid [163]

Answer: F = 2N

Explanation: If a current i is flowing in a wire of length L lying in a region of magnetic field B, then the magnetic force acting on the wire is given by

F = BIL

Please find the attached file for the solution

8 0
3 years ago
A shaving or makeup mirror is designed to magnify your face by a factor of 1.40 when your face is placed 20.0cm in front of it
Dennis_Churaev [7]

Answer:

(a) convex mirror

(b) virtual and magnified

(c) 23.3 cm

Explanation:

The having mirror is convex mirror.

distance of object, u = - 20 cm

magnification, m = 1.4

(a) As the image is magnified and virtual , so the mirror is convex in nature.

(b) The image is virtual and magnified.

(c) Let the distance of image is v.

Use the formula of magnification.

m =-\frac{v}{u}\\1.4=-\frac{v}{-20}\\v =28 cm

Use the mirror equation, let the focal length is f.

\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\\\frac{1}{f}=\frac{1}{28}+\frac{1}{20}\\\frac{1}{f}=\frac{28+20}{560}\\f=11.67cm

Radius of curvature, R = 2 f = 2 x 11.67 = 23.3 cm

5 0
3 years ago
Guyss i need helpp plss plsss ​
garri49 [273]

Answer:

trees

Explanation:

referring to the tree to prove his/her point.

7 0
3 years ago
Other questions:
  • A 2-kilogram object falls 3 meters. a. How much potential energy did the object have before it fell? b. How much work was accomp
    15·1 answer
  • An expanding gas does 153 J of work on its surroundings at a constant pressure of 1.01 atm. If the gas initially occupied 68.0 m
    9·1 answer
  • Which of the following is a typical product of nuclear fission?
    5·2 answers
  • Every few years, winds in Boulder, Colorado, attain sustained speeds of 45.0 m/s (about 100 miles per hour) when the jet stream
    6·1 answer
  • Here you go.................
    14·2 answers
  • An Electric Field does 25 mJ of work to move a +7.4 μC charge from one point to another. What is the potential difference betwee
    14·1 answer
  • Fnet = 110 N
    14·1 answer
  • How much work is required to move an electron
    11·1 answer
  • Please! I cant fail this! Im literally freaking out.....
    6·1 answer
  • Difference between kinetic energy and potential energy(please i need answer in 2minutes​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!