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4 years ago

Explain your thinking. What definition, rule, or reasoning did you use to decide

Physics

1 answer:

Vladimir79 [104]4 years ago

4 0

Answer:

Explanation:

A Solid is one of the three main states of matter. By definition a solid is something whose molecules are so densely packed together that it allows it to keep its shape. Therefore if the item has a definite shape that does not change on it's own it is a solid. As opposed to a liquid which will take and fill the shape of it's container.

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A uniform hollow spherical ball of mass 1.75 kg and radius 40.0 cm rolls without slipping up a ramp that rises at 30.0° above th

chubhunter [2.5K]

Answer:

The acceleration of the ball's center of mass = 2.94 m/s²

Explanation:

The speed of the ball at the base of the ramp, v = 2.63 m/s

Mass of the ball = 1.75 kg

Radius of the ball, R = 40 cm = 0.4 m

In this motion, potential energy due to the height of the ball is converted to linear angular kinetic energy

Based on the law of energy conservation

Potential energy = Linear KE + angular KE

KE = kinetic Energy

Linear KE = 0.5 mv²

Linear KE = 0.5 * 1.75 * 2.63²

Linear KE = 6.052 J

Angular KE = 0.5 Iω²

I = 2/ 3 MR² = 0.667 * 1.75 * 0.4²

I = 0.187 N.s

ω = V/R = 2.63/0.4

ω = 6.575 Rad/s

Angular KE = 0.5 * 0.187 * 6.575²

Angular KE = 4.04 J

PE = mgh = 1.75 * 9.8 * h = 17.15h

Using the law of energy conservation

17.15h = 6.052 + 4.04

h = 10.092/17.15

h = 0.589 m

$h = Ssin \theta\\S = h/sin \theta\\S = 0.589/sin30\\S = 1.178 m\\$

Using the equation of motion

$v^{2} = u^{2} + 2as\\2.63^{2} = 0^{2} + 2a(1.178)\\6.917 =2.356a\\a = 6.917/2.356\\a =2.94 m/s^{2}$

5 0

4 years ago

Both 192Ir and 137Cs are used in barchytherapy, the use of radioactive isotopes to treat various cancers.Both are beta emitters.

Masteriza [31]

B hmmmmmmmmmm ........

8 0

3 years ago

Which diagram is the best representation of gas molecules in a closed container? A. Diagram A B. Diagram B C. Diagram C D. Diagr

Alinara [238K]

A. Diagram A because gasses can "float" and spread out, all the others are pretty close together. Answer A would be the smartest decision.

4 0

3 years ago

Rita measured distances that a small boat traveled over 30 s. She wants to create a distance-time graph to show her data. Which

algol [13]

I’m pretty sure you use distance

8 0

3 years ago

6. Estimate the line width from thermal Doppler broadening for the CaII K line at 393.3 nm for a star with a temperature of 3,00

Anuta_ua [19.1K]

The line width is calculated as 121.6nm

Data;

Wave length = 393.3nm
T1 = 3000k
T2 = 12,000K

<h3>Rydberg's Formula</h3>

This is used to calculate the wavelength of an electron when it moves from one state to another.

For Lyman series, n = 1

The energy difference in the two state transitioning are

$n_2$ = ∞

The formula is given thus;

$\frac{1}{\lambda}= R(1(n_1)^2 - \frac{1}{(n_1)^2}.Z^2\\$

R = Rydberg's constant

Z = atomic number

Since the excited electron dropped from the 1st state to the ground state, the finest line of Lyman series would be

$\frac{1}{\lambda} = R(1(1)^2 - \frac{1}{2^2}).1^2\\z=1\\\lambda = \frac{4}{3} * 912A^o\\\lambda = 121.6nm$

The line width is calculated as 121.6nm

Learn more Lyman series here;

brainly.com/question/5295294

7 0

3 years ago