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nikitadnepr [17]
3 years ago
11

Groups of college students pursue the study of chemical compounds with similar reactivity. If they wish to do an in-depth backgr

ound study on periodic trends, they should MOST LIKELY
A) consult only their chemistry professors.
Eliminate
B) rely exclusively on each other’s background knowledge.
C) consult chemistry professors, chemistry textbooks, and scientific journals.
D) consult chemistry professors and further study through scientific-fiction movies.
Physics
1 answer:
mihalych1998 [28]3 years ago
7 0
C, because its the best answer

You might be interested in
Physics !!!!!!!!!!!!!!!!!
madreJ [45]

Answer:

1) v = -0.89 m/s

2) v = 36.5 m/s

Explanation:

1) Given

The mass of the boy, M = 45 Kg

The mass of the skateboard, m = 2 Kg

The initial velocity of the boy and skateboard is zero

According to the law of conservation of linear momentum

                              MV + mv = 0

                                           V = - mv/M

Substituting the given values in the above equation

                                          V = -2 x 20/ 45

                                             = -0.89 m/s

Hence, the velocity of the boy, v = -0.89 m/s

2) Given

The mass of the boy, M = 47 Kg

The mass of the skateboard, m = 8 Kg

The initial combined velocity of the boy and skateboard, u = 4.2 m/s

The boy jumped off from the skateboard with velocity, V = -1.3 m/s

According to the law of conservation of momentum,

                      MV + mv = (M + m)u

                                    v = [(M + m)u - MV] / m

Substituting the given values,

                                     v = [(47 + 8)4.2 - 47(-1.3)] / 8

                                        = 36.5 m/s

Hence, the velocity of the skateboard, v = 36.5 m/s

3 0
4 years ago
Which of the following is the best definition of the term pseudopsychology?
blagie [28]
Can you give us the options…?
3 0
3 years ago
What is the frequency of a wave traveling at 300,000,000 m/s with a wavelength of .0025 m/cycle ? Please explain good thank you
Reptile [31]

Answer:

The frecuency is 1.2*10¹¹ Hz.

Explanation:

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time, that is, how many peaks or valleys are repeated in a unit of time. Its unit is s – 1 or hertz (Hz).

The propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement. It relates the wavelength (λ) and the frequency (f) inversely proportional using the following equation:

v = f * λ.

In this case:

  • v= 300,000,000 m/s
  • f= ?
  • λ= 0.0025 m

Replacing:

300,000,000 m/s= f* 0.0025 m

Solving:

f= 300,000,000 m/s ÷0.0025 m

f= 1.2*10¹¹ \frac{1}{s} =  1.2*10¹¹ Hz

<u><em>The frecuency is 1.2*10¹¹ Hz.</em></u>

6 0
3 years ago
A merry go round has rotational inertia (moment of inertia) of 73.0 kg/m^2 and is rotating at a constant speed of 30.0 rads./sec
valentinak56 [21]
The angular speed is 64 mph
4 0
2 years ago
What is the most effective way to clean the science desks? <br><br> Hypothesis:
lukranit [14]
The most effective way to clean a science desks is to use a soapy water solution to clean tables using a clean disposable paper towel. Second, after cleaning the table surface with soap or detergent and rinsing with water, disinfect tables by using a diluted bleach water solution
6 0
3 years ago
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