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kupik [55]
2 years ago
6

Scientist A believes she has discovered a new procedure that is better than a procedure currently in use by physicians. She test

s her procedure on several occasions and achieves excellent results. Her procedure could be accepted as the best when a community of scientists A) accept Scientist A’s procedure automatically because of her credentials. B) carry on further discussion, using many trials if experimentation is needed. C) carry on further discussion, using only a few trials if experimentation is needed. D) reject Scientist A’s procedure; once a procedure is put into place, it can’t be altered with new evidence.
Physics
2 answers:
NISA [10]2 years ago
4 0

Answer:

B) carry on further discussion, using many trials if experimentation is needed.

Explanation:

To know if the procedure is the best, the hypotheses raised there must be verified in many ways, choosing experiments that do not provide us with ambiguous or incomplete results. It is very important that any other person can repeat it, since a scientific discovery is not valid until another scientist has replicated it.

stepladder [879]2 years ago
3 0

Answer:

B

Explanation:

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Two identical closely spaced circular disks form a parallel-plate capacitor. Transferring 1.4×109 electrons from one disk to the
allsm [11]

Answer:

r = 6.5*10^-3 m

Explanation:

I'm assuming you meant to ask the diameters of the disk, if so, here's it

Given

Quantity of charge on electron, Q = 1.4*10^9

Electric field strength, e = 1.9*10^5

q = Q * 1.6*10^-19

q = 2.24*10^-10

E = q/ε(0)A, making A the subject of formula, we have

A = q / [E * ε(0)], where

ε(0) = 8.85*10^-12

A = 2.24*10^-10 / (1.9*10^5 * 8.85*10^-12)

A = 2.24*10^-10 / 1.6815*10^-6

A = 1.33*10^-4 m²

Remember A = πr²

1.33*10^-4 = 3.142 * r²

r² = 1.33*10^-4 / 3.142

r² = 4.23*10^-5

r = 6.5*10^-3 m

3 0
2 years ago
Find the ratio of effusion rates of hydrogen gas and krypton gas.
algol13

Answer:

RE of Hydrogen = 6.47 x RE of Krypton

Explanation:

Actually the correct formula for comparing rate of effusion (RE) of two gases is:

RE of Gas A

------------------- = √ ( Molar mass of B / Molar mass of A)

RE of Gas B

You can designate which of the two gases you have (hydrogen and krypton) will be your gas A and gas B. So for this particular problem, let us make hydrogen as gas A and Krypton as gas B. So the equation becomes:

RE of Hydrogen

------------------------- = √ (Molar mass of Krypton / Molar mass of Hydrogen)

RE of Krypton

Get the molar masses of Hydrogen and Krypton in the periodi table:

RE of Hydrogen

------------------------- = √ (83.798 g/mol / 2 g/mol)

RE of Krypton

RE of Hydrogen

------------------------- = 6.47  ====> this can also be written as:

RE of Krypton

RE of Hydrogen = 6.47 x RE of Krypton

It means that the rate of effusion of Hydrogen gas will be 6.47 faster than the rate of effusion of Krypton gas. With the type of question you have, it doesn't matter which gases goes on your numerator and denominator. What's important is that you show the rate of effusion of a gas with respect to the other. But if that's concerns you the most, then take the gas which was stated first as your gas A and the latter as your gas B unless the problem tells you which one will be on top and which is in the bottom.

3 0
3 years ago
Why is graphite magnetic
loris [4]

Answer:

Graphite is actually diamagnetic. Pyrolytic graphite is commonly used with neodymium magnet cube arrays to float above it due to the graphite becoming a magnet with the same polarity as the field facing it so it repels.

Explanation:

6 0
2 years ago
PLEASE HELP ME!!!
s344n2d4d5 [400]

Answer:

I think is B. sound, nuclear, electrical

but if I wrong then I am so sorry

3 0
2 years ago
Classify each planet as an inner planet as an inner planet or an putter planet
svet-max [94.6K]

Answer:

Mars venus earth and Mercury are inner planets

Jupiter , Saturn , Uranus and Neptune are outer.

7 0
3 years ago
Read 2 more answers
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