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1 year ago

14

What is temperature? how temperature can be measured

1 answer:

german1 year ago

3 0

Answer:

Temperature is the kinetic energy of the particles of a substance.

Explanation:

The more kinetic energy a particle has the higher it's temperature. In the case of the atmosphere, which is what we are primarily concerned with in Meteorology, we measure this using a mercury thermometer (in certain situations we use an alcohol thermometer and of course modern times have given us things like dewcells and digital thermometers but we always go back to the mercury thermometer for accuracy).

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a large truck has a mass of 20000kg. it is traveling at 28m/s along a staright road . calculate the kinetic energy

Semmy [17]

Answer:

The answer is

<h2>7,840,000 J</h2>

Explanation:

The kinetic energy KE of an object given it's mass and velocity can be found by using the formula

$KE = \frac{1}{2} m {v}^{2} \\$

where

m is the mass

v is the velocity

From the question

m = 20000kg

v = 28 m/s

It's kinetic energy is

$KE = \frac{1}{2} \times 20000 \times {28}^{2} \\ = 10000 \times 784$

We have the final answer as

<h3>7,840,000 J</h3>

Hope this helps you

3 0

3 years ago

2) Which of the following are examples of projectiles? Choose all that apply.

xeze [42]

Answer:

2,4,5 are the answers

Explanation:

sky diver suit, helicopter and feather hAVE an external force pushing or floating them

8 0

2 years ago

An electric pump rated at 1000W, takes 16 seconds to pump 100 kg of water out to a tank at a height of 10 m. what is the efficie

TEA [102]

Answer:

$\boxed{\sf Efficiency \ of \ the \ motor = 62.5 \ \%}$

Given:

Input Power ( $\sf P_i$ )= 1000 W

Mass (m) = 100 kg

Height (h) = 10 m

Time (t) = 16 s

To Find:

Efficiency of the motor

Explanation:

$\boxed{ \bold{Output \: power \: (P_o)= \frac{mgh}{t}}}$

$\sf \implies P_o = \frac{100 \times 10 \times 10}{16}$

$\sf \implies P_o = \frac{10000}{16}$

$\sf \implies P_o = \frac{ \cancel{16} \times 625}{ \cancel{16}}$

$\sf \implies P_o = 625 \: W$

$\boxed{ \bold{Efficiency = \frac{Output \ Power \ (P_o)}{Input \ Power \ (P_i) } \times 100}}$

$\sf \implies Efficiency = \frac{625}{10 \cancel{00}} \times \cancel{100}$

$\sf \implies Efficiency = \frac{625}{10}$

$\sf \implies Efficiency = 62.5 \: \%$

$\therefore$

Efficiency of the motor = 62.5 %

5 0

3 years ago

4. What's the voltage drop if V, = 56 V, V2 = 35 V, and V3 = 3 V

Murrr4er [49]

Answer:

The correct option is A. 18 V

Therefore,

$V_{1}=18\ V$

Explanation:

Given:

Total Voltage,

V = 56 V,

Voltage drop

$V_{2}=35\ V$

$V_{3}=3\ V$

To Find:

$V_{1}=?$ (Assumed ,as it is not given clearly in the question)

Solution:

So in series combination total Voltage is given as

$V=V_{1}+V_{2}+V_{3}$

Substituting the values we get

$56=V_{1}+35+3\\\\V_{1}=56-38=18\ V$

Therefore,

$V_{1}=18\ V$

5 0

3 years ago

Which statement describes the law of conservation of energy

DanielleElmas [232]

Answer:

law of action and riactiond

4 0

1 year ago