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VashaNatasha [74]
3 years ago
5

When a physical change occurs, the mass of the substance is conserved. This means that the total mass of the substance remains t

he same from beginning to end. The physical properties of the substance, such as size and shape, may change, but the amount of matter in the substance does not change.
Physics
1 answer:
Doss [256]3 years ago
7 0
Yes yes ! How right you are ! Truer words were never spoken.
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The Answer to the question is plant cell. I got this wrong...Thanks Alot
Scilla [17]
This is a statement not a question .

7 0
3 years ago
Light is incident along the normal to face AB of a glass prism of refractive index 1.54. Find αmax, the largest value the angle
marusya05 [52]

To solve this problem it is necessary to use the concepts related to Snell's law.

Snell's law establishes that reflection is subject to

n_1sin\theta_1 = n_2sin\theta_2

Where,

\theta = Angle between the normal surface at the point of contact

n = Indices of refraction for corresponding media

The total internal reflection would then be given by

n_1 sin\theta_1 = n_2sin\theta_2

(1.54) sin\theta_1 = (1.33)sin(90)

sin\theta_1 = \frac{1.33}{1.54}

\theta = sin^{-1}(\frac{1.33}{1.54})

\theta = 59.72\°

Therefore the \alpha_{max} would be equal to

\alpha = 90\°-\theta

\alpha = 90-59.72

\alpha = 30.27\°

Therefore the largest value of the angle α is 30.27°

3 0
3 years ago
A seesaw has an irregularly distributed mass of 30 kg, a length of 3.0 m, and a fulcrum beneath its midpoint. It is balanced whe
gladu [14]

Answer:

x = 0.9 m

Explanation:

For this exercise we must use the rotational equilibrium relation, we will assume that the counterclockwise rotations are positive

          ∑ τ = 0

          60 1.5 - 78 1.5 + 30 x = 0

where x is measured from the left side of the fulcrum

           90 - 117 + 30 x = 0

           x = 27/30

           x = 0.9 m       

In summary the center of mass is on the side of the lightest weight x = 0.9 m

4 0
3 years ago
What is the acceleration of an object if it starts at a speed of 3 m/s and increases to
timofeeve [1]

Answer:

0.25 meters per second squared

Explanation:

6 0
2 years ago
<img src="https://tex.z-dn.net/?f=%5Cboxed%7B%5Ccolor%5Cred%5Chuge%5Ctt%5Cbold%5Cpurple%7BQuestion%7D%7D" id="TexFormula1" title
otez555 [7]

Answer:

Inertia : a property of matter by which it continue in its existing state of rest or uniform motion in a straight line, unless that state is changed by external force.

HOPE ITS HELPS!!

7 0
2 years ago
Read 2 more answers
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