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
slavikrds [6]
3 years ago
11

20-point physics question! :D

Physics
2 answers:
Alex3 years ago
8 0
Your hands get warm by a fire because chemical energy is converted into heat energy. 

The wood - has chemical energy when you burn it, and then, heat waves rise to the air, which means that we went from :

Chemical energy ⇒ Heat energy

Alright, now, also think about, that energy can never be created not destroyed, so it was obviously transferred, and yet conserved. 

If this doesn't make sense, please message me, or comment below. :))
Virty [35]3 years ago
6 0
I think, it must be a chemical. Because the fire is a chemical reaction. So, the chemical energy converted to heat energy.
You might be interested in
Key difference of the celsius scale and kevin scale
mixer [17]

Their 'degrees' are the same size.  The difference between the Celsius
and Kelvin scales is their zero-point.  Zero Kelvin is the absolute zero of
nature and Physics.  Zero Celsius is the melting/freezing point of water,
273.15 higher than absolute zero.

6 0
3 years ago
What are possible units for impulse? Check all that apply. kg • m kg • N • s N • m
Vlada [557]

We know that impulse is simply the product of Force and time:

Impulse = Force * time

 

Since Force has a unit of Newton or kg m/s^2 and time is in seconds, therefore impulse can have units as:

N s

or

<span>kg m/s</span>

4 0
3 years ago
A real image can be obtained with:
In-s [12.5K]

Answer:

convex lens and a concave mirror

4 0
3 years ago
Read 2 more answers
An automobile starter motor has an equivalent resistance of 0.0500Ω and is supplied by a 12.0-V battery with a 0.0100-Ω internal
alexandr1967 [171]

Answer

given,

resistance = 0.05 Ω

internal resistance of battery = 0.01 Ω

electromotive force = 12 V

a) ohm's law

        V = IR

     and volage

   V = \epsilon - Ir

now,

   IR = \epsilon - Ir

   I(R+r) = \epsilon

   I= \dfrac{\epsilon}{R+r}

inserting the values

   I= \dfrac{12}{0.05+0.01}

      I = 200 A

b) Voltage

   V = I R

   V = 200 x 0.05

   V = 10 V

c) Power

    P = I V

    P = 200 x 10 = 2000 W

d) total resistance = 0.05 + 0.09 = 0.14 Ω

 I= \dfrac{\epsilon}{R+r}

   I= \dfrac{12}{0.14+0.01}

     I = 80 A

     V = 80 x 0.05 = 4 V

     P = 4 x 80 = 320 W

6 0
3 years ago
Read 2 more answers
HELP URGENT- will give brainliest if correct
fredd [130]

Answer:

6 km is the right answer

hope it helps you

Explanation:

please mark me as brainliest

3 0
3 years ago
Other questions:
  • When a light shines through an object it is called
    15·1 answer
  • At t = 0, a flywheel has an angular velocity of 4.7 rad/s, a constant angular acceleration of −0.25 rad/s², and a reference line
    6·1 answer
  • A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4
    14·2 answers
  • When low on gasoline, is it better to increase or decrease the speed of the vehicle? Explain.
    12·1 answer
  • Metric system please help me I don’t know how to do this
    5·1 answer
  • A girl and boy pull in opposite directions on a stuffed animal. The girl exerts a force of 3.5 N. The mass of the stuffed animal
    13·2 answers
  • Within a vacuum, the property to all electromagnetic waves is their WHAT?
    10·1 answer
  • A 25-kg child runs at 4.0 m/s and jumps onto a shopping cart and holds on for dear life. The cart has mass 15 kg. Assuming the c
    12·1 answer
  • An object began moving at the starting point (0,0) on the graph. The average speed of the object for the entire trip of 5.0 hour
    9·2 answers
  • A 900 kg car moves around a 500 m radius curve at 25.0 m/s. What is the centripetal force on
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!