3 years ago

Molarity? what is it

1 answer:

5 0

Molarity is a concentration unit, defined to be the number of moles of solute divided by the number of liters of solution.

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NeTakaya

Answer:

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3 years ago

Calculation using Ohm's Law: If a circuit has a voltage of 500 V and a resistance of 250 ohms, what is the current?

konstantin123 [22]

I = V / R

Current = (voltage) / (resistance)

Current = (500 V) / (250 ohms)

Current = (500/250) Amperes

<em>Current = 2 Amperes</em>

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3 years ago

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Magnitude of u = 15, direction angle θ = 35° Magnitude of v = 18, direction angle θ = 60° Find the magnitude and direction angle

djverab [1.8K]

Answer:

32.225 and angle is 48.7 degree.

Explanation:

u = 15, θ = 35 degree

v = 18, θ = 60

First represent the u and v in vector form.

u = 15 (Cos 35 i + Sin 35 j ) = 12.287 i + 8.6 j

v = 18 ( Cos 60 i + Sin 60 j ) = 9 i + 15.6 j

The sum of the two vectors is given by

u + v = 12.287 i + 8.6 j + 9 i + 15.6 j = 21.28 i + 24.2 j

Magnitude of u + v = $\sqrt{21.28^{2}+24.2^{2}}$ = 32.225

Let Ф be the angle

tan Ф = 24.2 / 21.28

Ф = 48.7 degree

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3 years ago

A 1613 kg car moves with a velocity of 9 m/s. What is its kinetic energy?

ryzh [129]

We Know,

K.E. = 1/2 mv²

K.E. = 1/2 (1613)(9)²

K.E. = 1/2 * 1613*81

K.E. = 65326.5 Kgm/s

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4 years ago

Didn't know what type of science it was? But pls helpp

Alla [95]

The answer is the third one down. New evidence may contradict the old evidence of a certain theory.

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3 years ago