3 years ago

Which of the following places the elements in the correct order of increasing first ionization energy?

Chemistry

1 answer:

-BARSIC- [3]3 years ago

4 0

Be, Mg, Ca increasing first ionization energy

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A car traveling at a speed of 30.0 m/s encounters an emergency and comes to a complete stop in 7.5 seconds? What is the cars acc

Marianna [84]

Answer:

The acceleration is: $4m/s^2$

Explanation:

Given

$u = 30.0m/s$ --- The initial velocity

$t = 7.5s$ --- time

$v = 0m/s$ -- The final velocity

Required

Determine the acceleration

To do this, we make use of the first equation of motion

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We used negative because the car was coming to stop.

This gives:

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$0 = 30 - 7.5a$

Collect like terms

$7.5a = 30$

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3 years ago

Chose the mathematical formula expressing work.

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W = AB x F x Cos < AB, F
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4 years ago