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3 years ago

Find the volume of a box measuring 2 cm by 7 cm by 3 cm.

Physics

2 answers:

motikmotik3 years ago

6 0

Answer:42 cm 3 cubic unit

Explanation:

hram777 [196]3 years ago

6 0

Answer: 42

Explanation: you multiply 2 times 7 times 3 and get 42

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Which color in the rainbow has the shortest wavelength?

klio [65]

Answer:

violet

Explanation:

violet has shortest wavelength

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2 years ago

a ball is projected upward at time t = 0.00 s from a point on a roof 70 m above the ground. The ball rises, then falls and strik

grin007 [14]

Answer: 17.68 s

Explanation:

This problem is a good example of Vertical motion, where the main equation for this situation is:

$y=y_{o}+V_{o}t-\frac{1}{2}gt^{2}$ (1)

Where:

$y=0$ is the height of the ball when it hits the ground

$y_{o}=70 m$ is the initial height of the ball

$V_{o}=82m/s$ is the initial velocity of the ball

$t$ is the time when the ball strikes the ground

$g=9.8m/s^{2}$ is the acceleration due to gravity

Having this clear, let's find $t$ from (1):

$0=70m+(82m/s)t-\frac{1}{2}(9.8m/s^{2})t^{2}$ (2)

Rewritting (2):

$-\frac{1}{2}(9.8m/s^{2})t^{2}+(82m/s)t+70m=0$ (3)

This is a quadratic equation (also called equation of the second degree) of the form $at^{2}+bt+c=0$ , which can be solved with the following formula:

$t=\frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$ (4)

Where:

$a=-\frac{1}{2}(9.8m/s^{2}$

$b=82m/s$

$c=70m$

Substituting the known values:

$t=\frac{-82 \pm \sqrt{82^{2}-4(-\frac{1}{2}(9.8)(70)}}{2a}$ (5)

Solving (5) we find the positive result is:

$t=17.68 s$

7 0

3 years ago

Can you please help me

konstantin123 [22]

Answer:

I dont know sorryyyyyyy

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3 years ago

A transformer has 100 turns in its primary coil and 75 turns in its secondary coil. If the input voltage is 12.0 V, what is the

Sindrei [870]

Is 54 por que es igual

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3 years ago

An object's velocity can be described by its speed and acceleration.

dezoksy [38]

Hey there!

<span> An object's velocity can be described by its speed and acceleration.

This statement is true

Hope this helps
Have a great day (:
</span>

5 0

3 years ago

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