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Luda [366]
4 years ago
9

Kinetic energy can be passed from one object to another when objects collide,

Physics
2 answers:
antiseptic1488 [7]4 years ago
5 0
Kinetic energy can be passed from one object to another when objects collide,
Answer: True

Hope This Helps! :3
Dafna11 [192]4 years ago
3 0
True
`~~~~~~~~~~~~~~`
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Currents in dc transmission lines can be 100 A or higher. Some people are concerned that the electromagnetic fields from such li
lozanna [386]

Answer: 4.50*10^-6T (0.00000450071T)

Explanation: A current carrying conductor has been knowing to generate a specific amount of magnetic field.

This is given by the Bio-savart law (mathematical).

The Bio-savart law is a mathematical equation that gives the value of strength of the magnetic field created by a current carrying conductor.

B=(Uo* I) /2πr

Where

B= strength of magnetic field

Uo = magnetic permeability in free space = 1.257 *10^-6

r = distance between current carrying conductor and any reference point.

By doing the neccesary algebra, we have

B=(1.257 *10^-6 * 180)/ (2 * 3.142 * 8)

B= 2.2626 *10^-4 / 50.2857

B=4.5 * 10^-6T (0.00000450071T)

6 0
3 years ago
Plutonium-241 is an isotope of plutonium that is highly radioactive and is used in some nuclear reactors and many nuclear weapon
choli [55]
We use the radioactive decay equation for this problem which is expressed as:

An = Aoe^-kt

An is the remaining amount after time t, Ao is the initial amount and k is a constant.

First, we determine the k from the half life as follows:

An/Ao = 1/2 = e^-k(14.4)
k = 0.04814

Then, we can calculate An after 28.8 yr.

An = 1000 e^-0.04814(28.8)
An = 250 g
7 0
3 years ago
Read 2 more answers
Microphones and loudspeakers are used in an auditorium because the sound waves at the stage compared to the sound waves at the b
MaRussiya [10]
Acoustics (sounds)
Hope the this helps!
6 0
3 years ago
I would really appreciate the help on this pass paper question.
zvonat [6]

Answer:

Heat lost thru doors & windows = (100 - 75 - 5) = 20

20% is the fraction of heat lost thru doors and windows

One wants to obtain the largest savings per unit of cost

roof:

200 / 600 = 1/3

150 / 1000 = .15

40 / 2300 = .017

The largest of these is 1/3 so the most benefit would be obtained by insulating the roof

Since heat loss thru the roof depends on heat loss thru the attic, this is the most cost effective in reducing heat loss

The more the difference in temperature between the ceiling and roof (attic) the more heat will be lost thru the roof, so insulating the roof will decrease the heat loss of the attic

8 0
3 years ago
How many molecular orbitals are present in the valence band of a sodium crystal with a mass of 7.90 g?
fgiga [73]
Number of atoms equal the number of molecular orbitals as each atom has 1 atomic orbital and 1 electron.

Therefore,
Number of atoms = (mass/molar mass)*Avogadro's number = (7.90/22.99)*1.36*10^23 = 4.67*10^22 atoms.

Then,
Number of molecular orbitals = 4.67*10^22
8 0
3 years ago
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