Energy can never be created or destroyed just blank or blank

2 answers:

6 0

The law of conservation of energy states that energy can never be created nor destroyed but it can be conserved or transferred

Sladkaya [172]3 years ago

4 0

Transformes from one form to another like from KE to PE but it doesn't doe

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ivann1987 [24]

Answer:

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3 years ago

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Looking at group 2 on the periodic table which of these elements probably has the lowest ionic radius

lakkis [162]

I think the answer is Helium.

Please tell me if I'm wrong.

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3 years ago

The cylindrical tub of a dryer in a laundromat rotates counterclockwise about a horizontal axis at 41.5 rev/min as it dries the

frozen [14]

Answer:

$\theta = 49.81^0$

Explanation:

Given that:

$\omega = 41.5 \ rev/min\\\\\omega = 41.5 *\frac{1}{60}* 2 \pi\\\\\omega = 4.45 \ rad/s\\\\\\diameter = 0.748 m$

If we let the piece of the close lose contact at ∠θ;

Then ; from force balance;

we have:

$\\\\mg sin \theta = \frac{mv^2}{r}\\\\sin \theta = \frac{2v^2}{dg}\\\\\theta = sin^{-1} (\frac{2v^2}{dg})$

where;

$v = \frac{\omega d}{2}\\\\v = \frac{4.45 *0.748}{2}\\\\v = 1.6643\\\\v^2 = 2.77$

Again:

$\theta = sin^{-1}(\frac{2v^2}{dg})\\\\\theta = sin^{-1}( \frac{2*2.77}{0.74*9.8})\\\\\theta = 49.81^0$

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3 years ago

A technical machinist is asked to build a cubical steel tank that will hold 130l of water. calculate in meters the smallest poss

disa [49]

Answer:0.507m

To answer this question, you need to know how to calculate a cube volume. Cube volume is calculated by multiplying the length^3, make its unit become cubic meter.
In this case we know the volume is 130L and asked how long is the length in meter. Then you need to convert the liter into m3. The calculation would be:
V=R^3
130L= R^3
R= 3<span>√(130m3/1000)
R= 5.065797/10 m
R= 0.506579m
Rounded up to 0.507m</span>

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3 years ago

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A speed skater is sliding across the ice at a speed of 19 m/s when she encounters a rough patch of ice that is 2.0 m wide. As sh

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Answer:

$-9.25 m/s^2$