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Aleksandr [31]
3 years ago
8

How is heat transferred through radiation?

Physics
1 answer:
g100num [7]3 years ago
5 0
A. Through the direct contact of particles
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A disk rotates freely on a vertical axis with an angular velocity of 50 rpm . An identical disk rotates above it in the same dir
True [87]

Answer:

Final angular velocity is 35rpm

Explanation:

Angular velocity is given by the equation:

I1w1i + I2w2i = I1w1f -I2w2f

But the two disks are identical, so Ii =I2

wf can be calculated using

wf = w1i - w2i/2

Given: w1i =50rpm w2i= 30rpm

wf= (50 + 20) / 2

wf= 70/2 = 35rpm

5 0
3 years ago
As the distance between two objects decreases, the pull of gravity
aliya0001 [1]

Answer: increases

Explanation:

Because the relationship between hand d is counter

6 0
3 years ago
Two technicians are discussing a fuel gauge on a General Motors vehicle. Technician A says that if the ground wire's connection
r-ruslan [8.4K]

Answer:

b. Technician B only

Explanation:

There is a float connected to the variable resistor in a fuel tank unit. The resistance of the variable resistor also changes as the fuel level changes. The tank unit's resistance changes, the dash mount gauge also changes and available on driver's display.  

If the tank transmitter is disconnected, the operation will not take place and the resistance change will not be transmitted to the dash unit. The needle will therefore remain the empty one at all times.Even after being rusty, the ground wire connection to the fuel tank will be able to conduct. Hence Technician B   is correct and Technician A is incorrect.

8 0
3 years ago
A. Write 2 -3 sentences describing the mass number, charge, and penetrating ability of gamma rays.
Leya [2.2K]

Answer:

a. Mass number is the sum of number of protons and neutrons present in the nucleus of an atom.

A = p + n

Charge is a unit of matter that tells how more or less the number of electrons are present as compared to number of protons in an atom. A positive charge means the atom lacks electrons.

Gamma rays are highly energetic electromagnetic rays. They have high penetrating power and are very difficult to shield owing to high energy.

b. The compete nuclear equation is:

^{210} _{89} Ac \rightarrow ^4 _2 He + ^{206} _{87}Fr

This is a alpha decay process because alpha particle which is Helium atom is being produced. Francium is being formed after alpha particle is emitted.

c. The complete nuclear reaction is:  

^{80} _{38} Sr \rightarrow ^0 _{+1}e + ^{80} _{37}Rb

This is a positron emission process where in Rubidium is being formed.

8 0
3 years ago
Read 2 more answers
Provide one example of cultural change at the nonmaterial level.
Katen [24]

Answer:

Examples include cars, buildings, clothing, and tools. Nonmaterial culture refers to the abstract ideas and ways of thinking that make up a culture. Examples of nonmaterial culture include traffic laws, words, and dress codes.

5 0
1 year ago
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