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3 years ago

What is the correct answer?

Physics

1 answer:

umka2103 [35]3 years ago

8 0

Answer:

in my calculation the answer is letter a but in goo gle the answer is letter c

which one will you trust?

Explanation:

dont report me or i will report you

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A solid ball of mass M = 2.0 kg and radius R = 0.25 m starts from rest at a height h = 3.0 m above the bottom of the path. It ro

Lady bird [3.3K]

Answer:

6.48 m/s

Explanation:

We are given that

Mass,M=2 kg

Radius,R=0.25 m

Height,h=3 m

Moment of inertia of solid sphere= $I=\frac{2}{5}MR^2$

We have to find the linear speed.

$\omega=\frac{v}{R}$

By law of conservation of energy

$mgh=\frac{1}{2}I\omega^2+\frac{1}{2}mv^2$

$mgh=\frac{1}{2}I(\frac{v}{R})^2+\frac{1}{2}mv^2=\frac{1}{2}v^2(\frac{I}{R^2}+m)$

Where $g=9.8m/s^2$

Substitute the values

$2\times 9.8\times 3=\frac{1}{2}(\frac{2}{5R^2}MR^2+M)=\frac{7}{10}Mv^2=\frac{7}{10}(2)v^2$

$v^2=\frac{2\times 9.8\times 3\times 10}{7\times 2}$

$v=\sqrt{\frac{2\times 9.8\times 3\times 5}{7}}$

$v=6.48m/s$

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3 years ago

You must record your daily workouts on a

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I do a yoga mat that could be different to your answer

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Complete combustion of 1.0 metric ton of coal (assuming pure carbon) to gaseous carbon dioxide releases 3.3 x 1010 j of heat. co

netineya [11]

Keeping in mind that the conversion between calories and Joules is
$1 cal = 4.186 J$
we can write the conversion factor using the kilocalories:
$1 kcal = 4186 J$

The energy released in our problem is
$E=3.3 \cdot 10^{10} J$
so we can set a simple proportion to find its equivalent in kcal:
$1 kcal: 4186 J = x: 3.3 \cdot 10^{10} J$
from which we find:
$x= \frac{3.3 \cdot 10^{10} J \cdot 1 kcal}{4186 J} =7.88 \cdot 10^6 kcal$

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Madeline is measuring wavelengths. Look at her notes above. What mistakes has she made in her measurement? What should she do di

aleksklad [387]

She didn’t even measure a wavelength. she should measure crest to crest.

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3 years ago

Who is isac newten.gggggggg

dezoksy [38]

Answer:

mathematician, physicist, astronomer, theologian and author.

Explanation:

Greatest mathematician and the most influential scientist of all time.

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