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julsineya [31]
4 years ago
9

The only type of investigation that involves a control group is

Physics
2 answers:
OleMash [197]4 years ago
4 0
<span>experimental? I hope that helps :)</span>
frez [133]4 years ago
3 0
An experimental one. Hope this helped.
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Different types of heat transfer: What is radiation?
denpristay [2]
The transfer of internal energy in the form of electromagnetic waves.
3 0
4 years ago
Can u pls help me .....
andrew-mc [135]

Answer:

the floor absorb the water so the water is dry

5 0
3 years ago
A 328-kg car moving at 19.1 m/s in the x direction hits from behind a second car moving at 13.0 m/s in the same direction. If th
Jet001 [13]

Answer:

14.04 m/s

Explanation:

To find the velocity of the first car after the collision, we can use the equation of conservation of momentum:

m1v1 + m2v2 = m1'v1' + m2'v2'

We have the following data:

m1 = m1' = 328,

m2 = m2' = 790,

v1 = 19.1,

v2 = 13,

v2' = 15.1.

Using this data, we can find v1' (final velocity of the first car):

328 * 19.1 + 790 * 13 = 328 * v1' + 790 * 15.1

16534.8 = 328 * v1' + 11929

328 * v1' = 4605.8

v1' = 14.04 m/s

3 0
3 years ago
In part d, you saw that elements with even atomic numbers tend to be more abundant than neighboring elements with odd atomic num
jolli1 [7]
The atomic procedure clarifies why this is the situation is beginning from carbon ( the nuclear number is 6), the most widely recognized atomic responses include the combination of an extra helium core. I hope the answer will help you. 
8 0
4 years ago
An open organ pipe is 2.46 m long, and the speed of the air in the pipe is 345 m/s.
lukranit [14]

Answer:

Fundamental frequency is 70.12 m

Explanation:

For an open organ pipe, the fundamental frequency is given by :

f=\dfrac{nv}{2l}

n = 1 for fundamental frequency

v is speed of sound in air, v = 345 m/s

l is length of open organ pipe, l = 2.46 m

Substituting values in above formula. So,

f=\dfrac{1\times 345}{2\times 2.46}\\\\f=70.12\ Hz

So, the fundamental frequency of this pipe is 70.12 m.

6 0
3 years ago
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