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Rus_ich [418]
3 years ago
13

The brakes in a car increase in temperature by ΔT when bringing the car to rest from a speed v. How much greater would ΔT be if

the car initially had twice the speed? You may assume the car to stop sufficiently fast so that no heat transfers out of the brakes.\
Physics
1 answer:
Wewaii [24]3 years ago
4 0

Answer:

T would be two times the temperature That it was before the double so if the initial temperature was 20 it would now be 40

Explanation:

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Can someone please help me out with this question thanks
IrinaK [193]

Answer:

1.98V

Explanation:

V =IR

V =Voltage

I =Current

R = ResistanceV =IR\\V = 100 (0.0198)\\V = 1.98 volts\\Voltage 1.98V

8 0
3 years ago
4 kg of water was
morpeh [17]

Given :

Mass =5kg

T

1

=20

∘

C,T

2

=100

∘

C

ΔT=100−20=80

∘

C

Q=m×C×ΔT

where C= specific heat capacity of water

=4200J/(kgK)

Q=5×4200×80

=1680000 Joule.

=1680KJ

6 0
3 years ago
How can gravitational energy play an important part of my life
m_a_m_a [10]

Answer:

Explanation:

Well, lets say you park your car on the top of a hill, gravitational energy prevents it from the car falling back. Or a snow pack, aka before a potential avalanche. Though gravity cannot keep it safe forever, gravitational energy keeps it from crashing asap. In this case, it gives you time to escape. Altogether, gravitational force keeps the earth in it's atmosphere.

8 0
3 years ago
Why can videos be streamed from one computer to another with excellent quality?
AleksAgata [21]

Answer:

(d) they are transmitted using digital signals

Explanation:

i just did the quiz an got it right

3 0
2 years ago
Read 2 more answers
When asked how to create an electromagnet, the best answer would be:
fredd [130]

Answer:

You can create an electromagnet by wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current."

Explanation:

Electromagnets are made by wrapping an insulated wire around a metal with ferromagnetic properties (example is iron), to form a loop, and then applying a current through the wire. Electromagnets can generate magnetism with a strong force field, and unlike normal magnets, their strength can be varied by varying the amount of current flowing through the coil. Their main disadvantage, which is also their most utilized property is that their magnetism is lost once the current flowing through the wire is cut-off.

4 0
3 years ago
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