3 years ago

What are the condition required work to be done

Physics

2 answers:

Wewaii [24]3 years ago

7 0

Answer:

The first is that the object moves

Phantasy [73]3 years ago

4 0

Object must move in the direction of the force applied

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A substance has a boiling point of 220 degrees Celsius and a melting point of −120 degrees Celsius. What state will it be at roo

ozzi

Room temperature is 36 degrees celsius

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3 years ago

A cylinder containing an ideal gas has a volume of 2.6 m3 and a pressure of 1.5 × 105 Pa at a temperature of 300 K. The cylinder

frozen [14]

<h2>Answer: $13.5\times 10^{8}$ joules</h2>

Explanation:

From the first law of thermodynamics,

Δ $Q$ =Δ $U$ + $W$

Where $Q$ is the heat given to the gas,

$U$ is the internal energy of the gas,

$W$ is the workdone by the gas.

When pressure is constant,

$\frac{V_{1}}{T_{1}}=\frac{V_{2}}{T_{2}}$

$V_{2}=\frac{2.6\times 900}{300}=7.8m^{3}$

When pressure is constant, $W=P$ Δ $V$

Where $P$ is pressure and $V$ is the volume of the gas.

Given $P=1.5\times 10^{5}Pa$

Δ $V=$ $7.8-2.6=5.2m^{3}$

So, $W=1.5\times 10^{5}\times 5.2=7.8\times 10^{5}J$

Given that Δ $U=6\times 10^{5}$

So,Δ $Q=$ $6\times 10^{5}+7.8\times 10^{5}=13.8\times 10^{5}J$

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4 years ago

The velocity of a bus increases from 27km/h to 30m/s in . Calculate its acceleration.

Ksivusya [100]

Explanation:

Correct option is

1m/s

in the given question we have

u=36 km/hr =36×

m/s=10m/s

v= 72 km/hr=72×

m/s=20m/s

t=10 s

a=?

we know the formula

v= u +at

20 = 10+ a 10

20-10 =10 a

10 = 10 a

a = 1 m/s

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3 years ago

What muscle movement do we use to close a joint.

marin [14]

Answer: Your using your skeletal muscle

Explanation:

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3 years ago

Which of these objects has the least amount of inertia? A a cricket B a bicycle C a baseball

LenaWriter [7]

The least amount of inertia would be the one with least mass.

Of all the options, the smallest mass is likely the insect the cricket.

<span>A a cricket </span>

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4 years ago