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3 years ago

13

You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would

select the compound with the ____________________ melting point.

1 answer:

nikitadnepr [17]3 years ago

4 0

The answer is <span>highest</span>

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Fariza wears a red hat in her school play. On stage, she is lit by a spotlight shining only green light. When our eyes receive n

FromTheMoon [43]

Answer:It's how the color mixes together . Red and green both makes a dark color

Explanation:

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3 years ago

Speed has ____ magnitude and _____ direction ??

ArbitrLikvidat [17]

Speed has only magnitude and no direction.

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3 years ago

How fast can Usain Bolt run if it takes him 9.9 s to run 100m?

Arte-miy333 [17]

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27.8 mph

Explanation:

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3 years ago

Read 2 more answers

What potential difference is needed to give a helium nucleus (q=2e) 85.0 kev of kinetic energy?

Vilka [71]

The kinetic energy K given to the helium nucleus is equal to its potential energy, which is
$E=q \Delta V$
where q=2e is the charge of the helium nucleus, and $\Delta V$ is the potential difference applied to it.
Since we know the kinetic energy, we have
$E=K=85~keV=q \Delta V$
and from this we can find the potential difference:
$\Delta V = \frac{K}{q}= \frac{85~keV}{2e}=42.5~kV$

6 0

3 years ago

The apparent weight of a student in alift is 564N . if the mass of the student is 60.3kg, what is the acceleration of the lift ?

Yuki888 [10]

Answer:

-.457 m/s^2

Explanation:

Actual weight = 60 .3 (9.81) = 591.54 N

Accel of lift changes this to 60.3 ( 9.81 - L) where L - accel of lift

60.3 ( 9.81 - L ) = 564

solve for L = .457 m/s^2 DOWNWARD

so L = - .457 m/s^2

4 0

2 years ago