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3 years ago

Is there a such thing as an elastic collision? Why do we study the case of the elastic collision in Physics?

1 answer:

6 0

Yes there is an elastic collision in physics its when a collision occurs but no kinetic energy is loss. We study them in order to understand how to conserve momentum.

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3. ¿Cuál es la distancia focal de un espejo CONVERo sabiendo que un objeto colocado

lions [1.4K]

i dont know for real

8 0

3 years ago

Explain what the ionosphere is and how it interacts with some radio waves.

kumpel [21]

Answer:

Explained

Explanation:

Ionosphere is the outermost layer of the Earth's atmosphere,extending from 60 km to 1,000 km altitude.
It mainly consists of ionized gases by the solar radiation.
It is very important layer to Earth because it influences the radio propagation to distant places on Earth.
Being ionized it reflects high frequency(shortwave) radio waves to the sky as well as to the Earth by a technique called "skip" or "skywave" propagation for the communication over long distances.

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3 years ago

. You have completed your design of a new surgical headlamp. You have decided to power the headlamp using four AA rechargeable b

SSSSS [86.1K]

Answer:

LED run before the batteries are depleted is 3.87 hours

Explanation:

given data

battery = 4 AA

battery is rated = 1.2V, 2550 mAh

power = 3 W

efficient = 95%

to find out

How long will the LED run before the batteries are depleted

solution

we consider here power delivered by battery is = x

so power = x × efficient

3 = x 95%

x = 3.15 W

and

voltage by 4 battery is = 4 × 1.2 = 4.8 V

so current will be = $\frac{x}{volatge}$

current = $\frac{3.15}{4.8}$

current = 0.6577 A

so total discharge hours = $\frac{2550}{current}$

total discharge hours = $\frac{2550}{657.7}$

time = 3.87 hours

so LED run before the batteries are depleted is 3.87 hours

5 0

4 years ago

George determines the mass of his evaporating dish to be 3.375 g. He adds a solid sample to the evaporating dish, and the mass o

zhannawk [14.2K]

Explanation:

The given data is as follows.

Mass of evaporating dish = 3.375 g

Total mass = Mass of solid sample + evaporating dish

That is, Mass of solid sample + evaporating dish = 26.719 g

Therefore, we will calculate the mass of solid sample as follows.

Mass of solid sample = (Mass of solid sample + evaporating dish) - mass of evaporating dish

= 26.719 g – 3.375 g

= 23.344 g

Thus, we can conclude that mass of his solid sample must be 23.344 g.

3 0

4 years ago

The diagram shows a motion map for a train. A motion map. The position line is a long black arrow pointing right that is labeled

Elis [28]

Answer:

the train stopped for 3 seconds

Explanation:

5 0

3 years ago