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REY [17]
2 years ago
9

Explain why the atomic mass of an element is weighted average mass

Physics
1 answer:
madreJ [45]2 years ago
3 0

Explanation:

The mass written on the periodic table is an average atomic mass taken from all known isotopes of an element. This average is a weighted average, meaning the isotope's relative abundance changes its impact on the final average. The reason this is done is because there is no set mass for an element.

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5.37 At steady state, a power cycle develops a power output of 10 kW while receiving energy by heat transfer at the rate of 10 k
Anika [276]

Answer: minimum theoretical value of T = 750k

Explanation:

Assuming the the cycle is reversible and is ideal then

Wnet/Qh = Nmin .... equa 1

Equation 1 can be rewritten as

(Th -TL)/ Th ...equation 2

Th= temp of hot reservoir

TL= temp of low reservoir= 300

Wnet = power generated=10kw

He = energy transfer=10kj per cycle

Qhe = power transfer = (100/60)*10Kj = 16.67kw

Sub into equat 1

Nmin = 10/16.67 = 0.6

Sub Nmin into equation 2

Th = -TL/(Nmin -1) = -300k/(0.6 - 1)

Th =750k

4 0
3 years ago
At what speed must a 950-kg subcompact car be moving to have the same kinetic energy as a 3.2×104−kg truck going 20 km/h?
Ostrovityanka [42]

<u>Answer:</u>

 950-kg subcompact car be moving to have the same kinetic energy of truck at 116.08 km/hr

<u>Explanation:</u>

  Kinetic energy of body with mass m and moving at velocity v is given by

                  KE=\frac{1}{2} mv^2

  KE of truck  = \frac{1}{2}*3.2*10^4*20^2

  KE of subcompact car = \frac{1}{2}*950*v^2

  Equating

         \frac{1}{2}*3.2*10^4*20^2= \frac{1}{2}*950*v^2\\ \\ v=116.08 km/hr

 So 950-kg subcompact car be moving to have the same kinetic energy of truck at 116.08 km/hr

6 0
4 years ago
Please help!<br> Drag and drop the words into the correct locations
Stells [14]

Answer:

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uniform

13700000000 years ago

7 0
3 years ago
Read 2 more answers
Does the speed of a satellite around Earth depend on its mass? Its distance from Earth? The mass of Earth?
skelet666 [1.2K]
No the speed does not depend on its mass, yes to the second question and yes to the third
3 0
3 years ago
What is the shape of the orbit of satellites?
Rainbow [258]
All objects in orbit must follow the path of an ellipse (one of Keplers laws)
8 0
4 years ago
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