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3 years ago

8

If two stars in the sky are separated by twice the angle projected by your index and pinky fingers, then how many degrees are th

ey apart?

1 answer:

quester [9]3 years ago

7 0

Answer:

The answer is 30 degrees.

Explanation:

The angle between the index and pinky fingers is 15 degrees.

Twice this angle is 2×15=30degrees.

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We decided to make an iced latte by adding ice to a 200 mL hot latte at 45 °C. The ice starts out at 0 C. How much ice do we nee

tankabanditka [31]

Answer:

m = 77.75 g

Explanation:

Here we know that at equilibrium the temperature of the system will be 10 degree C

so heat given by hot latte = heat absorbed by the ice

now we have

heat given by latte = $m s\Delta T$

$Q_1 = (200)(4.186)(45 - 10)$

$Q_1 = 29302 J$

now heat absorbed by ice is given as

$Q_2 = mL + ms\Delta T$

$Q_2 = m(335 + 4.186(10 - 0))$

$Q_2 = m(376.86)$

now by heat balance we have

$Q_1 = Q_2$

$29302 = m(376.86)$

$m = 77.75 g$

6 0

2 years ago

e-lub [12.9K]

The engineer built a device called a generator

4 0

3 years ago

Adding heat to a liquid causes which of the following physical changes?

Nadya [2.5K]

Decreases density because gases have less density than liquids

4 0

3 years ago

Read 2 more answers

What are the three factors needed for Newton’s Second Law?

Anastasy [175]

Answer:

the weight of the object, the force of gravity acting on said object, and the mass of the object are needed for Newton's second law of motion.

5 0

3 years ago

4. In a object filled with a type of gas, which of the following actions would decrease the pressure

ExtremeBDS [4]

Answer:

Decrease the number of gas particles, increase the object's area, and reduce the temperature of the gas

Explanation:

<u>TEMPERATURE</u>:

Decreasing the temperature will slow down the molecules. Hence, less no. of collisions will take place between walls of object and molecules. This will result in decrease of pressure.

Therefore, the pressure of a gas can be decreased by increasing its temperature.

<u>NUMBER OF GAS PARTICLES</u>:

Decreasing the number of particles will result in less no. of collisions, hence decreasing the pressure.

Therefore, the pressure of a gas can be decreased by decreasing its no. of molecules or no. of particles.

<u>AREA OF OBJECT:</u>

The pressure is given by the formula:

$P = \frac{F}{A}\\\\For constant Force (F):\\P\ \alpha\ \frac{1}{A}$

where,

A = Area of Object

Therefore, the pressure of a gas can be decreased by increasing area of object.

So, the correct option is:

<u>Decrease the number of gas particles, increase the object's area, and reduce the temperature of the gas</u>

7 0

3 years ago