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WARRIOR [948]
3 years ago
7

Water has a high specific heat capacity. This means that a lot of energy is needed to change its temperature. True or false?

Physics
1 answer:
Leona [35]3 years ago
3 0

Answer:

a true

Explanation:

Water has the high specific heat capacity.

That means it resists to change its temperature when a considerable amount of heat lost or gained

4200J is needed to raise the temperature of 1kg substance by 1 degree Celsius

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A fighter jet flies 3 km west and then 2 km east in 8 minutes. Determine the jet's average velocity. (Remember to convert!)
blondinia [14]

Answer:

7.69km/hr due east

Explanation:

Given parameters:

Displacement due west  = 3km

Displacement due east = 2km

Time taken  = 8 minutes

Unknown:

Average velocity  = ?

Solution:

Average velocity is the rate of change of displacement with time.

  Velocity  = \frac{displacement}{time }

 Displacement is deals with the start and the end;

  Here, displacement  = 3km - 2km  = 1km due east

Time  = 8min

     60min  = 1hr

       8min = \frac{8}{60}   = 0.13hr

 Average velocity = \frac{1km}{0.13hr}   = 7.69km/hr due east

6 0
3 years ago
Explain the importance of resistors in a circuit. Cite some instances to prove this example.
Arisa [49]
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical
7 0
3 years ago
Sort the types of energy according to the order in which they move through this system:
Firdavs [7]

Answer:

Gravitational energy

kinetic energy

Electrical energy

Light energy

Explanation:

When water stored in dams falls freely, the potential energy stored is converted into kinetic energy.

So, it is gravitational energy

As turbines move, it is kinetic energy.

Electricity is produced, it is electrical energy.

For lightening, it is light energy.

Energy is conserved, Energy can neither be created nor be destroyed. It can transform from one form of energy into another.

6 0
3 years ago
Read 2 more answers
Two resistors of 10 and 15 n are connected. What is their combined resistance if they are connected: a) in series b) in parallel
kati45 [8]

Explanation:

Given that,

Two resistors of 10 ohms and 15 ohms are connected.

In series combination, the equivalent resistance is given by :

R_s=R_1+R_2\\\\R_s=10+15\\\\R_s=25\ \Omega

In parallel combination, the equivalent resistance is given by :

\dfrac{1}{R_p}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{R_p}=\dfrac{1}{10}+\dfrac{1}{15}\\\\R_p=6\ \Omega

Hence, this is the required solution.

7 0
2 years ago
Convert 450km/h to nm/ps. show procedure :)
r-ruslan [8.4K]
You would do 450 divided by 3,600, and your answer would be 0.125nm/ps :)))
4 0
3 years ago
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