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3 years ago

The image shows a volcanic eruption.

Physics

2 answers:

SIZIF [17.4K]3 years ago

6 0

This eruption is explosive.

eimsori [14]3 years ago

4 0

Answer:

B, it is explosive

Explanation:

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An object moving in circular motion has a mass of 15 kg and a centripetal acceleration of 10 m/s2. What is the centripetal force

sweet-ann [11.9K]

Answer:

1) A

2) C

3) B

4) A

5) Incomplete information(picture missing)

6) Incomplete information(picture missing)

7) Incomplete information(picture missing)

8) A

9) C

10) C

Explanation:

1) m = 15kg, a = $10ms^{-2}$ , F = ma = 15*10 = 150N

2) m = 3kg, v = $4ms^{-1}$ , r = 4m, F = $\frac{mv^{2} }{r}$

$\frac{3*4^{2} }{4}$ = 12N

3) a = $10ms^{-2}$ , r = 10m, v=?

F = $\frac{mv^{2} }{r}$ and F = ma

equating the two equations and cancelling a, we have:

$\frac{v^{2} }{r}$ = a

making v the subject of formula, we have:

v = $\sqrt{ar}$

= $\sqrt{100}$

= 10 $ms^{-1}$

4) r = 10m, v = $5ms^{-1}$ , a = ?

F = $\frac{mv^{2} }{r}$

F = ma

equating the above equations and making a subject of formula, we get:

a = $\frac{v^{2} }{r}$

a = 25/10 = 2.5 $ms^{-2}$

5) I can't find the picture associated with this question

6) I can't find the picture associated with this question

7) I can't find the picture associated with this question

8) F = $\frac{mv^{2} }{r}$

assuming m and r is unity, that is the values are 1 respectively, the formula simplifies to:

F = $v^{2}$

Now, if v is tripled

F = $(3v)^{2}$

F = 9 $v^{2}$

We can see that the force will be 9X greater than it was.

9) F = $\frac{mv^{2} }{r}$

assuming m and r is unity, that is the values are 1 respectively, the formula simplifies to:

F = $v^{2}$

Now, if v is doubled

F = $(2v)^{2}$

F = 4 $v^{2}$

We can see that the force will be 4X greater than it was.

10) F = $\frac{mv^{2} }{r}$

assuming m and v is unity, that is the values are 1 respectively

F = 1/r

if r is doubled,

F = 1/2 * 1/r

We can see that the force is 1/2 as big as it was

7 0

3 years ago

Coil of wire called an

Wewaii [24]

Explanation:

Coil of wire called an winding.

3 0

3 years ago

Read 2 more answers

If a horse gallops one meter per second how for can it travel 1 minute

Tasya [4]

SOLUTION:

1 minute = 60 seconds

1 second = 1 metre

1 × 60 = 1 × 60

60 seconds = 60 metres

1 minute = 60 metres

Therefore, the horse can gallop / travel 60 metres in 1 minute.

Hope this helps! :)
Have a lovely day! <3

8 0

4 years ago

Read 2 more answers

Which of the following statements about the cosmic background radiation is not true?

belka [17]

<h2>Answer: It is the result of a mixture of radiation from many independent sources, such as stars and galaxies. </h2>

Microwave background radiation was accidentally discovered by Penzias and Wilson on 1964. This is a form of electromagnetic radiation that <u>is present in the </u><u>whole universe</u><u> and completely fills it (it is isotropic)</u>.

<h2>It is the leftover radiation from the big bang. </h2>

Its frequency belongs to the microwaves range and is one of the main demonstrations of the of the Big Bang theory model.

It is important to note the Big Bang occurred 400,000 years before the events related to the microwave cosmic radiation, this means the Big Bang occurred first.

6 0

3 years ago

How many moles of MgCl2 are there in 337 g of the compound?

bixtya [17]

3.51 Moles. I am pretty sure that is right.

4 0

3 years ago