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shutvik [7]
4 years ago
15

The main goal of science is to A. Learn how to use the laws of nature to benefit humans. B. Learn about the universe and the law

s of nature. C. Replace old theories with new, more interesting theories. D. Develop new inventions and processes.
Physics
1 answer:
marishachu [46]4 years ago
7 0

The main goal of science is to learn about the universe and the laws of nature. <em>(B)</em>

The goal of Applied Science, Technology, and Engineering is to develop new inventions and processes (D), that can use the laws of nature to benefit humans. (A)

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An electron moving along the x axis has an initial speed of 1 × 106 m/s at the origin. Its speed is reduced to 5 × 105 m/s at th
mina [271]

Answer:

-2.13 V

Explanation:

Given parameters are:

v_i = 1 * 10^6 m/s

v_f = 5 * 10^5 m/s

q = -e = 1.602 * 10^{-19} C

m = 9.109 * 10^{-31} kg

By conservation of energy principle, we know that the potential difference between two points is equal to the change in the kinetic energy between these points.

-\Delta U = \Delta KE\\\\-e\Delta V = \frac{1}{2} mv_f^2 - \frac{1}{2} mv_i^2

Hence,

1.602*10^{-19}\Delta V = \frac{1}{2}*9.11*10^{-31}((5*10^5)^2 - (1*10^6)^2)

⇒ \Delta V = -2.13 V

5 0
4 years ago
Which one of the following temperatures is equal to 5°C?
natali 33 [55]

Answer : The correct option is, (D) 278 K

Explanation :

We are given temperature 5^oC.

Now the conversion factor used for the temperature is,

K=^oC+273

where, K is kelvin and ^oC is Celsius.

Now put the value of temperature, we get

K=5^oC+273=278K

Therefore, the temperature 278 K is equal to the 5^oC


7 0
3 years ago
Which of the diagrams below show forces that would result in a movement of the block to the left?
xenn [34]

Diagram A will result in the movement of the block to the left as a result of the forces.

<h3>What is Force?</h3>

This is referred to an influence which is capable of changing the motion of an object.

Diagram A has equal upward and downward force and left side which is 60N is higher than the right side which has 20N. The block will therefore move to the left.

Read more about Force here brainly.com/question/25239010

#SPJ1

4 0
2 years ago
Given that the speed of sound in air is 330m/s ,calculate the frequency of a note which setup a wavelength of 5cm in air.Is this
Pie

Explanation:

v = wavelength x frequency

330 = 5 . 10-² m x f

f = 6600 Hz

the frequency that human can hear is about 20 Hz - 20000 Hz

so human can hear the note.

3 0
4 years ago
Read 2 more answers
When light enters a pair of glasses, it ______________ when it hits the glass
Natali [406]
The answer is it refracts 
5 0
4 years ago
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