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sweet [91]
3 years ago
15

17. If ice has a density of 0.92g/cm?, what is the mass of a 30 cm block? I

Physics
1 answer:
arsen [322]3 years ago
3 0

Answer:

Mass = 27.6 grams

Explanation:

Given the following data;

Density of ice = 0.92g/cm³

Volume = 30cm³

To find mass of ice;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

Density = \frac{mass}{volume}

Making mass the subject of formula, we have;

Mass = density * volume

Mass = 0.92 * 30

Mass = 27.6 grams

Therefore, the mass of ice is 27.6 grams.

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The Cassegrain design provides more compact (shorter) telescopes. Why? (Examine figures 2.4.2 and 2.4.3). The shorter design is
Ipatiy [6.2K]

Answer:

Because the light reflects multiple times until it gets to the Cassegrain focus.

Explanation:

The Cassegrain design can be seen in a reflecting telescope. In this type of design the light is collected by a concave mirror, and then intercepted by a secondary convex mirror, and sends it down to a central opening in the primary mirror (concave mirror), in which a detector is placed (Cassegrain focus)

Since, the light is reflected many times due to Cassegrain design, that leads to shorter telescopes.                    

5 0
3 years ago
(Please help 25 points)
Maksim231197 [3]

The potential energy (P.E) of X at r is less than P.E at s.

The total energy (T.E) of Y is less than total energy (T.E) of X.

The PE of Y at v is greater than the PE of Z at c.

The speed of Y at i is .greater than that at v.

The kinetic energy (KE) of z at u is less than that at n.

The PE of Y at s is less than the PE of X at c.

The PE of X at c is less than the PE of Z at c.

The PE of X at c is less than the PE of Z at c.

<h3>PE of X at r  and at s</h3>

The potential energy (P.E) of X at r is less than P.E at s due to greater displacement at s.

<h3>TE of Y is .... the TE of X</h3>

The total energy (T.E) of Y is less than total energy (T.E) of X because X has greater displacement from the planet.

<h3>PE of Y at v is .... the PE of Z at c</h3>

The PE of Y at v is greater than the PE of Z at c due to greater displacement at v.

<h3>Speed of Y at i is .... that at u</h3>

The speed of Y at i is .greater than that at v because i is closer to the planet than v.

<h3>KE of Z at u is .... that at n</h3>

The kinetic energy (KE) of z at u is less than that at n because n is closer to the planet and will have greater velocity.

<h3> PE of Y at s is .... the PE of X at c</h3>

The PE of Y at s is less than the PE of X at c, because position c has greater displacement.

<h3>The TE of Z is .... the TE of X</h3>

The TE of Z is greater than the TE of X due to greater displacement of Z from the planet.

<h3>The PE of X at c is .... the PE of Z at c</h3>

The PE of X at c is less than the PE of Z at c due to greater displacement of Z from c.

Learn more about potential energy here: brainly.com/question/1242059

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