PHYSICS HIGH SCHOOL

A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K. Assuming constant pressure, what should the new volume of the view be? 320 cm3
501 cm3
1232 cm3
616 cm3

Answers

Answer 1
Answer:

To solve this we assumethat the gas inside the balloon is an ideal gas. Then, we can use the ideal gasequation which is expressed as PV = nRT. At a constant pressure and number ofmoles of the gas the ratio T/V is equal to some constant. At another set ofcondition of temperature, the constant is still the same. Calculations are asfollows:

 

T1 / V1 = T2 / V2

 

V2 = T2 x V1 / T1

 

V2 = 308 K x 556 cm³  / 278 K

 

V2 = 616 cm³

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A constellation is _______ that forms a pattern resembling animals, mythological characters, or objects.A. a group of meteors
B. a group of stars
C. an entire galaxy
D. one single planet

Answers

The answer is the option B. a a group of stars. So the complete sentence is "A constellation is a group of stars that forms a pattern resembling animals, mythological characters, or objects. Most names of constellations originated in ancient times and took their names from the patterns that observer could watch in the sky. Some examples of constellations are Orion, Aquarium, Cancer, etc.

Which force acts on a body if it is fully or partially immersed in a
liquid? ​

Answers

Answer:

Buoyant Force

Explanation:

That's literally the definition of the buoyant force

Assume you have 3 light bulbs connected in a series circuit to a battery.What can you say about the current through each light bulb?
Current varies through all bulbs
There is no current through the bulbs
Current is the same through all bulbs

Answers

Answer:

Current is the same through all bulbs

Explanation:

Because it's a series circuit, the current traveling through the circuit doesn't change. In a parallel circuit, however, the current would not be the same due to the different 'paths' of the circuit.

a warrior swings a slingshot in a horizontal circle above his head at a constant speed. The sling is 1.5 m long, and the stone has a mass of 50 g. The tension in the string is 3.3 N. When he releases the sling, what will the stone's speed be?

Answers

The speed of the stone when he releases the sling is equal to 9.95 m/s.

Given the following data:

  • Length of sling (radius) = 1.5 meter
  • Mass of stone = 50 grams to kg = 0.05 kg
  • Tension = 3.3 Newton

To determine the speed of the stone when he releases the sling:

First of all, we would solve for the angular velocity of the stone by applying

the law of conservation of momentum.

Tension in the string = Centrifugal force of the stone

Tension = mrw^2

\omega = \sqrt{(Tension)/(mr) } \n\n\omega = \sqrt{(3.3)/(0.05 * 1.5) }\n\n\omega = √(44)

Angular velocity = 6.63 rad/s

Now, we can determine the speed of the stone when he releases the sling:

V = r\omega\n\nV=1.5 * 6.63

Speed, V = 9.95 m/s

Read more: brainly.com/question/17742679
r = 1.5 m , m = 0.05 kg
Tension = Centrifugal force
T= mrw² , w = angular velocity
3.3 N = 0.05 x 1.5 x w²
w = 6.63 rps
Linear Velocity = rw = 1.5 x 6.63 = 9.945 m/s

Why is the Earth's surface warmer than the surface of other planets, like Mars?a. The Earth's atmosphere releases heat.
b. The Earth's surface receives less energy from the sun's rays.
c. The Earth's rotation transfers energy more evenly.
d. The Earth's atmosphere traps heat.

Answers

The earth's rotation transfers energy more evenly.

Part 1. A girl leaves a history classroom and walks 10 meters north to a drinking fountain. Then she turns and walks 30 meters south to an art classroom. What is the girl's total distance traveled? Part 2. Using the information above from Part 1. What is the girl's total displacement from the history classroom to the art classroom?

Answers

The total distance traveled by the girl will be 40 meters and the displacement will be 30 meters.

What will be the distance and displacement of the girl?

Distance = total amount of path followed by any body called distance.

Displacement= The minimum distance between two points irrespective to the path followed by the body is displacement.

It is given that

Distance traveled to north direction = 10 metres

Distance traveled to south direction= 30 metres

So the path followed by the girl in total = North direction + south direction

                                                                 = 10+30

                                                                 = 40 meters

And the displacement  = min distance between History class and fountain

                                      = 30 meters

total distance traveled by the girl will be 40 meters and the displacement will be 30 meters.

To learn more about Distance and Displacement follow

brainly.com/question/127432
She walks/travels 40 meters. Her displacement is 20 metres because she walked 10m, back those same 10m and the 20m to the art classroom.
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