PHYSICS MIDDLE SCHOOL

What causes the difference between quiet and explosive eruptions?Explain.

Answers

Answer 1
Answer: Well it depends on how much silica is in the magma ?

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Is polonium flammable?

Answers

Answer:

Explanation:

Polonium is not flammable, although highly reactive and can reach temperatures of up to 500°C
Yes at the tem of 500

31 POINTS COME AN GET IT PPL!If a satellite or spaceship explodes in outer space, you can see the explosion from a distance but you cannot hear it. Why?












A)
Light waves travel very fast and sound waves travel much slower.



B)
Sound waves transmit energy while light does not transmit energy.



C)
Sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave.



D)
Light is a mechanical wave and needs a medium to travel through while sound is an electromagnetic wave

Answers

The answer is A.

Light waves travel faster than sound waves. This is also why lightning is always seen before thunder is heard.

A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?Express the speed to two significant figures and include the appropriate units.

Answers

The speed of the car is 75 km/h

Further explanation

These are the formulas that we have to remember before solving the problem.

Speed is the rate of change of distance.

\large { \boxed {v = (d)/(t)}}

v = speed ( m/s )

d = distance ( m )

t = time ( s )

Acceleration is the rate of change of velocity.

\large { \boxed {a = (\Delta v)/(t)}}

a = acceleration ( m/s² )

Δv = change in speed ( m/s )

t = time ( s )

Let us now tackle the problem!

Given:

distance = d = 150 km

time taken = t = 7200 s = 2 hours

Unknown:

velocity = v = ?

Solution:

v = (d)/(t)

v = (150)/(2)

\large {\boxed {v = 75~km/h} }

The acceleration of the car is 0 m/s² because it travels with constant speed.

We could also plot the distance vs time graph as shown in the attachment.

Learn more

Answer details

Grade: Middle School

Subject: Physics

Chapter: Kinematics

Keywords: indycar top speed of a fastest police car has ever gone

Final answer:

The car's speed is 75 km/hour, as determined by dividing the total distance travelled (150 km) by the total time taken (2 hours).

Explanation:

To answer this question, we use the

formula for speed

, which is distance traveled divided by the time taken. Here, the distance travelled by the car is 150 km and the time taken is 7200 s (which is equal to 2 hours). Therefore, the speed will be 150 km divided by 2 hours, resulting in a speed of

75 km/hour

, stated to the correct number of significant figures.

Learn more about Speed Calculation here:

brainly.com/question/35969362

#SPJ6

How did scientists boost the spacecraft Juno on its way to Jupiter, helping it overcome the gravitational pull of the Sun?

Answers

For the answer to the question above asking how did scientists boost the spacecraft Juno on its way to Jupiter, helping it overcome the gravitational pull of the Sun?
Scientists boost the spacecraft Juno on its way to Jupiter, helping it overcome the gravitational pull of the Sun by using a gravitational slingshot.

Answer: B.) by using a gravitational slingshot

Because the moon rotates once for each revolution around Earth,a. you see some phases more than others.
b. a different side of the moon faces Earth each day.
c. you never see the far side of the moon from Earth.
d. the far side of the moon is visible only during the full moon phase.

Answers

Good Morning, how are you?

Your answer is C. The moon orbits and rotates the same, so we NEVER see the far side of the moon from earth :)

Have a great day :)

Answer:

C. The moon orbits and rotates the same, so we NEVER see the far side of the moon from earth

Explanation:

Dark cooler areas on the sun's surface are called what? (Prominences, solar flares, coronas, or sunspot)

Answers

Darker, cooler areas on the sun's surface are called sunspots.
Hope that helped =)
The answer in sunspot.
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