3 years ago

Which of the following values of pH will change blue litmus paper red?

1 answer:

5 0

As far as I know acids turn litmus paper red and bases turn it blue. on the pH scale anything under 7 is acid and above is base so I think it is A. I am not totally sure, but that is the best answer I can give you! Good Luck! Hope this helps!!

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3 years ago

The strength of the Earth’s magnetic field B at the equator is approximately equal to 5 × 10−5 T. The force on a charge q moving

Blizzard [7]

Answer:

$2.4\cdot 10^{-11} N$

Explanation:

Since the Earth's magnetic field is perpendicular to your direction of motion, the strength of the magnetic force exerted on your head is given by:

$F=qvB$

where:

$q=6\cdot 10^{-9}C$ is the charge on your head

$v=80 m/s$ is the speed at which you are moving

$B=5\cdot 10^{-5} T$ is the strength of the magnetic field of the Earth

By substituting these numbers into the equation, we find the strength of the magnetic force:

$F=(6\cdot 10^{-9}C)(80 m/s)(5\cdot 10^{-5} T)=2.4\cdot 10^{-11} N$

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4 years ago

Read 2 more answers

Two horses on opposite sides of a narrow stream are pulling a barge up the stream. Each hors pulls with a force of 720N. The rop

Sonja [21]

For the answer to the question above, each horse's force forms a right angle triangle with the barge and subtends an angle of 60/2 = 30°. The resultant in the direction of the barge's motion is:
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4 years ago