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Mumz [18]
2 years ago
11

A truck is driving north at 35 miles per hour and passes a car going south at 40 miles per hour. What is the speed of the car fr

om the truck driver’s frame of reference?
Physics
2 answers:
inna [77]2 years ago
7 0

Answer:

70

Explanation:

right...

Citrus2011 [14]2 years ago
7 0

Answer:

120

………………..........................................

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A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?
jenyasd209 [6]

Carbon-14 atom have 6 protons plus 8 neutrons.

Explanation

Carbon-12 and Carbon-14 are examples of isotopes of carbon that have huge applications in the field of science.

Isotopes are those elements who have equal number of protons and electrons whereas their neutrons differ.

Therefore isotopes have same atomic number, as atomic number depends on number of protons or number of electrons whereas number of neutrons do not have a role in atomic number.

But mass numbers of isotopes are different as mass numbers depend on the number of protons and number of electrons.

6 0
4 years ago
5 basic fact of sound​
qwelly [4]

Answer:

When an object moves it creates a vibration.

Vibrations move air particles around.

These moving particles are constantly bumping into each other.

Our ears can pick up these “particle-vibrations” as sound.

Fast moving particles create a high sound, while slow ones are low-sounding.

Explanation:

8 0
3 years ago
A car is travelling at a speed of 21m/s. It accelerates at an average rate of 3m/s^2 for a time
Vilka [71]

Answer:

S = 108m

Explanation:

According to Second Law of Motion:

S = Vi*t + 0.5*a*t^2

Vi = 21m/s

a = 3m/s^2

t = 4s

Putting all values in Equation

S = 21*4 + 0.5*3*4^2

S = 84 + 24

S = 108m

7 0
3 years ago
2. A fan has a power rating of 20 watts and is used for
stealth61 [152]

Answer:

Hold up wait let me think

Explanation:

5 0
3 years ago
Q C A 1000-kg satellite orbits the Earth at a constant altitude of 100km. (a) How much energy must be added to the system to mov
vfiekz [6]

The changes in the systems $\Delta E=4.69 \times 10^8 \mathrm{~J}$.

<h3>What is called a circular?</h3>
  • A circular is just a letter that is circulated widely and contains some crucial information. A circular will be the most effective form of communication if, for instance, you need to amend the dress code for the entire workplace or invite an entire department to a conference.
  • A leaflet or newspaper supplement is referred to as a "circular" since its original purpose was for it to circulate—to pass among a group of people. According to the Oxford English Dictionary, the word was created in the early 19th century as a shortened version of the much older term "circular letter."
  • Being circular with your economy means you have purposefully returned the excess or waste your company produces to the sourcing track. Anything from raw materials used in production to concepts developed

What are the changes in the system's:

$\Delta E=\frac{G m m}{2}\left[\frac{1}{r i}-\frac{1}{\pi b}\right]$

$\Delta E=\frac{G M m}{2}\left[\frac{1}{r+A_i}-\frac{1}{r+A_b}\right]$

$\Rightarrow \Delta E=\frac{6.67 \times 10^{-11} \times 5.98 \times 10^{24} \times 10^3 \times 2.352 \times 10^{-9}}{2} \mathrm{~J}$

$\Delta E=4.69 \times 10^8 \mathrm{~J}$

To learn more about circular, refer to:

brainly.com/question/25938130

#SPJ4

3 0
2 years ago
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