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Zepler [3.9K]
3 years ago
14

1. Read the section in your textbook "Sources from the Past

Physics
1 answer:
posledela3 years ago
8 0

Answers

3) Since the Industrial Revolution began around 1750, human activities (powered mostly by fossil fuels) have contributed substantially to climate change by adding CO2 and other heat-trapping gases like methane and the ozone depleting gases like the chloro-floro-carbons to the atmosphere. These greenhouse gas emissions have increased the greenhouse effect and caused Earth's surface temperature to rise.

4) Resources are distributed in different ways and in different amounts throughout the world. Often as a result of past geologic processes such as volcanic activity or tectonic movement, this unequal distribution means that various quantities of certain resources like marine resources, arable land, minerals, etc. are only available to some people. The distribution of natural resources depends upon many physical factors like land, climate and altitude. The distribution of these resources is unequal because these factors differ from place to place on earth. One of the most striking examples of the unequal distribution of resources on the planet is the existence of chronic hunger in some parts of the world and the undevelopement of some places due to lack of natural resources availability. Increased international trade from the removal of trade barriers has narrowed down resources distribution among and within some nation states. Many wealthier countries export non-land-intensive goods and services in return for agricultural and animal products amongst others examples.

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Two vectors A and B are at right angles to each other. The magnitude of A is 3.00. What should be the length of B, so that the m
AfilCa [17]

Answer: length of B =4.00

Explanation:

for  the vectors A and B and the angle between them as  x.

Magnitude of the sum of A and B is  given as = √(A²+B²+2ABcosx

where

Magnitude of A  = 3.00

Magnitude of the sum of A and B is  5.00

5.00=√(A²+B²+2ABcos90°

5.00= √3² +b² +0

5²= 3² +b²

25=9+b²

b²= 25-9

b² = 16

b=  √16

b= 4

7 0
3 years ago
A sound wave can cause the particles in a medium to vibrate slowly or quickly what is this rate of vibration called?
stealth61 [152]

Answer:

FREQUENCY

Explanation:

3 0
3 years ago
Read 2 more answers
In an electric header 500w is written. What is its meaning​
Fiesta28 [93]

Answer:

Because it's wattage is 500W.

Explanation:

This is its mearurement

4 0
3 years ago
A catapult can project a projectile at a speed as high as 37.0 m/s. (a) if air resistance can be ignored, how high (in m) would
motikmotik

Then the maximum height of the catapult will be 69.78 meters.

<h3>What is kinematics?</h3>

The study of motion without considering the mass and the cause of the motion. The equation of motion is given below.

v = u + at

s = ut + (1/2)at²

v² = u² + 2as

A catapult can project a projectile at a speed as high as 37.0 m/s. (a) if air resistance can be ignored.

a = - 9.81 m/s²

u = 37 m/s

v = 0

s = h

Then the maximum height of the catapult will be given by the third equation.

v² = u² + 2as

0² = 37² - 2 × 9.81 × h

h = 37² / (2 × 9.81)

h = 69.78 meters

Then the maximum height of the catapult will be 69.78 meters.

More about the kinematics link is given below.

brainly.com/question/7590442

#SPJ1

4 0
1 year ago
Examples of fixed pulley?​
Neko [114]

Answer:

One example of a fixed pulley is a Flag Pole

Explanation:

A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag. Other examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.

4 0
3 years ago
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