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Greeley [361]
3 years ago
12

A

Physics
1 answer:
Reika [66]3 years ago
4 0

Answer:

759

Explanation:

You might be interested in
A car stops with an acceleration of -20 m/s/s in 8 seconds. How far did it go while stopping?
Sophie [7]

Answer:

640 m.

Explanation:

The following data were obtained from the question:

Acceleration (a) = –20 m/s/s

Time (t) = 8 s

Final velocity (v) = 0 m/s

Distance (s) =.?

Next, we shall determine the initial velocity (u) of the car. This can be obtained as follow:

Acceleration (a) = –20 m/s/s

Time (t) = 8 s

Final velocity (v) = 0 m/s

Initial velocity (u)

a = (v – u) / t

–20 = (0 – u) / 8

–20 = – u / 8

Cross multiply

–20 × 8 = – u

– 160 = – u

Divide both side by – 1

u = – 160 / – 1

u = 160 m/s

Finally, we shall determine the distance travelled by the car before stopping as follow:

Time (t) = 8 s

Final velocity (v) = 0 m/s

Initial velocity (u) = 160 m/s

Distance (s) =.?

s = (v + u)t /2

s = (0 + 160) × 8 /2

s = (160 × 8) /2

s = 1280 / 2

s = 640 m

Therefore, the car travelled 640 m before stopping.

3 0
4 years ago
Match each term to its definition.
ladessa [460]
Ion is e
Element is a
Compound is f
Sorry that’s all I know
4 0
4 years ago
What mistake did Kamala make? Gamma rays should have a very high frequency, not a very low frequency. Visible light should have
olasank [31]

Answer:

The answer is "Option A".

Explanation:

Please find the complete question in the attached file.

Kamala uses Gamma radiation inside this question should be very high, not very low. Electromagnetic radiation is a penetrating type resulting from radioactive nuclear decline. Its radiation is a very high-frequency, radioactive waveform to frequencies greater than 10^{19} \ Hz usually emitted from the radioactive decline.

6 0
3 years ago
An empty train car of mass 2.0 x 10^4 kg coasts along at 10 m/s. A 3000-kg boulder is suddenly dropped vertically into the car.
Zepler [3.9K]

Answer:8.69 m/s

Explanation:

Given

mass of Empty train m=2\times 10^4 kg

velocity of car v=10 m/s

mass of Boulder M=3000 kg

Since no External force is acting therefore conserving Momentum

Train and boulder moves with same velocity after collision

m v=(M+m)v'

2\times 10^4\times 10=(2\times 10^4+3000)v'

v'=\frac{20,000\times 10}{23000}

v'=8.69 m/s

8 0
3 years ago
20 points, please help asap!! Needs to be done by today/tonight!! So please help me!!
natima [27]

Answer:

New Moon

The Moon's position in space at New Moon.

New Moon is the first primary phase and it occurs the moment when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon.

A New Moon cannot normally be seen from Earth since only the dark side of the Moon faces our planet at this point. Sometimes, if the New Moon is close to the Lunar nodes of its path, it can cause a Solar Eclipse.

The greatest difference between high and low tide, also known as spring tides, takes place around New Moon and Full Moon.

Waxing Crescent Moon

The moment a thin sliver of the Moon becomes visible after New Moon is the beginning of the first intermediate phase, the Waxing Crescent Moon.

In the past, this used to be called New Moon while the darkest phase was called Dark Moon. This traditional definition of New Moon is still in use in some cultures, defining the beginning of the months for instance in the Islamic calendar.

The rest of the Moon is also sometimes faintly visible during most of this phase because Earth also reflects sunlight onto the Moon, a phenomenon called earthshine.

First Quarter Moon

First Quarter Moon is the second primary phase.

First Quarter Moon is the second primary Moon phase and it is defined as the moment the Moon has reached the first quarter of its orbit around Earth, hence the name. It is also called Half Moon as we can see exactly 50% of the Moon's surface illuminated. Whether you see the left or right half illuminated, depends on several factors, including your location.

The smallest difference between high and low tide, also known as neap tides, occurs around the 2 Quarter Moons.

Waxing Gibbous Moon

The second intermediate phase, the Waxing Gibbous Moon, lasts until the next primary phase. Waxing means that it is getting bigger. Gibbous refers to the shape, which is larger than the semicircle shape of the Moon at First Quarter, but smaller than a full circle.

Full Moon

Full Moon is the brightest phase.

@timeanddate.com

The Full Moon appears in the night sky when the Sun and the Moon are aligned on opposite sides of Earth.

How can Full Moon be in the daytime?

Technically, this alignment only lasts a moment. However, the Moon can appear to be full a day before or after while more than 98% of the Moon's disc is illuminated.

When a Full Moon occasionally passes through Earth's shadow, it will cause a lunar eclipse.

When the Full Moon comes close to the points of its orbit that are closest or farthest away from Earth, we call it a Supermoon or Micromoon, respectively.

What is the Moon Illusion?

Waning Gibbous Moon

The next intermediate Moon phase is the Waning Gibbous Moon. The portion of the visible half of the Moon illuminated decreases during this period.

Third Quarter Moon

Third Quarter Moon is the last primary phase.

The Third Quarter Moon occurs the moment the opposite half of the Moon is illuminated compared to the First Quarter Moon.

Waning Crescent Moon

The Waning Crescent Moon. The Sun illuminates less than half of the visible part of the Moon during this Moon phase and you can sometimes see earthshine on the rest of the Moon towards the end.

Explanation:

4 0
3 years ago
Read 2 more answers
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