What is scientific evidence and when do we have enough?

1 answer:

4 0

Scientific evidence is evidence that is backed up by science and you have enough when you can understandingly prove your point or hypothesis

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Two soccer players kick the same 1-kg ball at the same time in opposite directions. one kicks with a force of 20 n; the other ki

kolezko [41]

We can solve the problem by using Newton's second law of motion:
$\sum F = ma$ (1)
where
the term on the left is the resultant of the forces acting on an object
m is the mass of the object
a is the acceleration of the object

The mass of the ball in this problem is m=1 kg. Two forces are applied, in opposite directions, of 20 N and 12 N, therefore the resultant of the forces is
$\sum F= 20 N-12 N=8 N$

Therefore, we can rearrange eq.(1) and use these data to find the acceleration of the ball:
$a= \frac{\sum F}{m}= \frac{8 N}{1 kg}=8 m/s^2$

6 0

3 years ago

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What type of nuclear reaction is shown in the diagram below? Write 2 - 3 sentences describing what happens in this reaction, whe

Aliun [14]

This happens at Sun 's inside

The process is called fusion

This denotes to

When two hydrogen nucleus combine to form a single helium nucleus.

It releases lots of solar energy which can be used to create electricity

8 0

2 years ago

A snowball is rolling down a hill at 4.5 m/s and accumulating snow as it goes. Its diameter begins at 0.50 m and ends at the bot

Reil [10]

To find the change in centripetal acceleration, you should first look for the centripetal acceleration at the top of the hill and at the bottom of the hill.

The formula for centripetal acceleration is:
Centripetal Acceleration = v squared divided by r

where:
v = velocity, m/s
r= radium, m

assuming the velocity does not change:

at the top of the hill:
centripetal acceleration = (4.5 m/s^2) divided by 0.25 m
= 81 m/s^2

at the bottom of the hill:
centripetal acceleration = (4.5 m/s^2) divided by 1.25 m
= 16.2 m/s^2

to find the change in centripetal acceleration, take the difference of the two.
change in centripetal acceleration = centripetal acceleration at the top of the hill - centripetal acceleration at the bottom of the hill

= 81 m/s^2 - 16.2 m/s^2
= 64.8 m/s^2 or 65 m/s^2

6 0

3 years ago

**20points**

polet [3.4K]

B) a new element is formed

3 0

3 years ago

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a hawk flies in a horizontal arc of radius 10.3 m at a constant speed of 4.8 m/s. find its centripetal acceleration. answer in u

n200080 [17]

The hawk’s centripetal acceleration is 2.23 m/s²

The magnitude of the acceleration under new conditions is 2.316 m/s²