3 years ago

Why is water considered a polar molecule?

Physics

2 answers:

saul85 [17]3 years ago

8 0

The answer is C. Oxygen tends to be slightly negative because of electron sharing with the two hydrogen atoms.

prohojiy [21]3 years ago

6 0

Answer: C.................

Explanation:

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Two small frogs simultaneously leap straight up from a lily pad. Frog A leaps with an initial velocity of 0.551 m/s, while frog

goblinko [34]

Answer:

d = .076 m

Explanation:

The time for frog A can be calculated from equation of motion

$v_f = v_o + at$

where v_f is final velocity, a is acceleration due to gravity

so from given data we have

$-0.551= 0.551 + (-9.8)(t)$

t = 0.112 sec

Now we will use that time for frog B

$v_f = v_o + at$

$v_f = 1.23 + (-9.8)(0.112)$

$v_f = 0.128 m/s$ (Note its positive)

For the displacement

$s = v_o t + 0.5at^2$

$s = (1.23)(0.112) + (.5)(-9.8)(0.112)^2$

d = .076 m

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3 years ago

Which statement is true about alkali metals? A. Some of them explode when exposed to water. B. They are in group 18 of the perio

WINSTONCH [101]

The Answer To This Is A , The Most Reactive Of The Alkali Explode Due To Reactions To Water

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3 years ago

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A machine is supplied Energy at a rate of 4000 W and does useful work at a rate of 3760 W. What is the efficiency of the machine

ICE Princess25 [194]

The efficiency of a machine is the ratio between the output power and the power in input:
$\epsilon = \frac{P_{out}}{P_{in}}$
in our problem, the output power is 3760 W while the input power is 4000 W, so the efficiency is
$\epsilon = \frac{3760 W}{4000 W} =0.94$
So the efficiency of the machine is 94%.

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3 years ago

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timurjin [86]

Answer: Choice B: baseball bat; increases velocity

Explanation:

I got this right on my test !!!!!!!

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4 years ago

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