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
katovenus [111]
3 years ago
9

How much energy is required to increase the temperature of

Physics
1 answer:
Basile [38]3 years ago
6 0

Explanation:

Q=msdt

= 2 x 128 x (7-4)

=256 x 3

= 768 J

You might be interested in
A horizontal disk with a radius of 10 cm rotates about a vertical axis through its center. The disk starts from rest at t = 0 an
Tom [10]

Answer:

0.69s

Explanation:

10 cm = 0.1 m

Let t be the time that radial and tangential components of the linear acceleration of a point on the rim be equal in magnitude. At that time we have the angular velocity would be

\omega = \alpha t = 2.1 t

And so the radial acceleration is

a_r = \omega^2 r = (2.1t)^2 r = 2.1^2 t^2 * 0.1= 0.441 t^2 m/s^2

The tangential acceleration is always the same since angular acceleration is constant:

a_t = \alpha * r = 2.1 * 0.1 = 0.21 m/s^2

For these 2 quantities to be the same

a_r = a_t

0.441 t^2 = 0.21

t^2 = 0.21/0.441 = 0.4762

t = \sqrt{0.4762} = 0.69 s

6 0
3 years ago
Science assessment help pls
DENIUS [597]

Answer:

Work Done = W

force = F

Distance = d

W = Fd

or W = F*d

W (in joules) = 3.5*4 = 14 Nm (or J)

1Nm = 1J

so newton meters and joules are the same

Power = Work (in joules) /time (in seconds)

i don’t know the time so i can’t solve it

3 0
2 years ago
Read 2 more answers
Covert 35000000 miles to meters and show how you got the answer?
Lina20 [59]

Answer:

56327040000 metres

Explanation:

1 mile =

1609.344 metres

35000000 miles = x meters

we represent x by the number of meters which the requested miles maps to

we cross multiply, so 1609.344×35000000 = 1 × x

x =56327040000 metres

8 0
3 years ago
Why is ammeter connected in series in an electric circuit?
topjm [15]
In order to measure the size of the electrical current flowing in the circuit,
the current must pass through the meter.
8 0
3 years ago
Which planet has the most gravity and why
djyliett [7]

heya mate

the planet Jupiter has most gravity due to its size

7 0
3 years ago
Read 2 more answers
Other questions:
  • Spot welding is used to fuse two sheets of metal together at one small spot. Two copper electrodes pinch the sheets together at
    9·1 answer
  • Science and technology are interdependent. Advances in one lead to advances in the other.Give an example of this phenomenon.
    11·1 answer
  • A women who normally weighs 400 N stands on top of a ladder so high she is one full additional earth radius above the surface of
    7·1 answer
  • Are the phases of the moon the same everywhere on earth
    5·1 answer
  • Plz help me with this sheet?
    8·2 answers
  • The term angle of deviation is used in reference to
    11·1 answer
  • Hich of these best describes Earth’s mantle?
    11·1 answer
  • Are women sports underpaid compared with man? (Example: Women's USA soccer team is paid way less then Men's USA soccer team)
    5·2 answers
  • Based on the evidence, write a scientific explanation of what type of wave is being exhibited when crowds at stadiums do “the wa
    13·1 answer
  • A bike accelerates uniformly from rest to a speed of 10 m/s over a distance of 50 m. (a) Determine the acceleration of the bike.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!