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pentagon [3]
3 years ago
10

When heating a substance a phase change will start to occur when kinetic energy of the particles is _____ attractive forces bewt

ween the particles
low enough to overcome

great enough to combine

great enough to overcome

low enough to combine

equal to
Physics
1 answer:
Sergeu [11.5K]3 years ago
8 0
Great enough to overcome
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Answer: 8.4 kW•hr

Explanation:

600 W • (14 hr) / (1000 W/kW) = 8.4 kW•hr

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Sand is pouring out of a pipe and is forming a conical pile on the ground. The radius of the pile is increasing at a rate of 2 f
Anton [14]

Answer:

a)\ V=3053.628059 \ ft^3

b)\ V'=1017.876\ ft^3/day

Explanation:

<u>Rate of Change</u>

The volume of a cone of radius r and height h is given by

\displaystyle V=\frac{\pi r^2h}{3}

The height is said to be 1/2 of the radius, thus

\displaystyle V=\frac{\pi r^2\cdot r}{2\cdot 3}

\displaystyle V=\frac{\pi r^3}{6}

a) Knowing r=18 feet, the volume is

\displaystyle V=\frac{\pi 18^3}{6}

V=3053.628059 \ ft^3

b) The rate of change of the volume is computed by taking the derivative of both sides respect to the time

\displaystyle V'=3\frac{\pi r^2}{6}r'

\displaystyle V'=\frac{\pi r^2}{2}r'

Where r' is the given rate of change of the radius: 2 feet/day.

Now we compute

\displaystyle V'=\frac{\pi 18^2}{2}\cdot 2=1017.876

\boxed{V'=1017.876\ ft^3/day}

6 0
3 years ago
Find the missing number for each unit rate? 10/2 =?/1 and 16/4=?/1
Lyrx [107]
10/2= 5/1 or just 5
16/4=4/1 or just 4
7 0
3 years ago
The term fetus completes which of the following lists to show the correct order of development?
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a loaded sack of total mass is 1000 gramme falls down from the floor of a lorry 200cm high, calculate the workdone by the gravit
Helen [10]

Answer:

W = 20 J

Explanation:

Given that,

The mass of a loaded sack, m = 1000 g = 1 kg

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We need to find the work done by the gravity. The work done by an object under the action of gravity is given by :

W = mgh

Substitute all the values,

W = 1 × 10 × 2

= 20 J

Hence, the required work done by gravity is equal to 20 J.

8 0
3 years ago
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