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Inessa05 [86]
2 years ago
5

Why did the following change occur? the snow that covered the ground all winter began to melt, temperatures rose, and flowers st

arted to bloom
A.) Days became shorter.
B.) The Earth tilted away from the sun
C.) The sun's rats became for concentrated.
D.) Earth completed one revolution
Physics
2 answers:
FromTheMoon [43]2 years ago
8 0

Answer:C

Explanation:

Alexeev081 [22]2 years ago
7 0

Answer:

B

Explanation:

Because the earth shifts axes points so it would make it cllser hotter etc

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A man pushes a lawn mower on a level lawn with a force of 195 N. If 37% of this force is directed downward, how much work is don
densk [106]

Answer:

W = 1032.6 J

Explanation:

Net force by which man push the lawn mower is given as

F = 195 N

now it is given that 37% of this force is vertically downwards

so we will have

F_y = 0.37 \times 195

F_y = 72.15 N

now we also know that

F_x^2 + F_y^2 = F^2

here we have

F_x^2 + 72.15^2 = 195^2

F_x = 181.2 N

Now work done by this force to move the lawn mower is given as

W = F_x . d

W = (181.2)(5.7 m)

W = 1032.6 J

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2 years ago
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The motor bike can travel 225 kilometers on 5 liters of petrol
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2 years ago
A sound source of frequency f moves with constant velocity (less than the speed of sound) through a medium that is at rest. A st
ANTONII [103]

Answer:

The correct answer is d

Explanation:

In this exercise they ask us which statement is correct, for this we plan the solution of the problem, this is a Doppler effect problem, it is the frequency change due to the relative speed between the emitter and the receiver of sound.

The expression for the Doppler effect of a moving source is  

f ’= (v / (v- + v_s) f  

From this expression we see that if the speed the sound source is different from zero feels a change in the  frequency.

The correct answer is d

7 0
2 years ago
Some curious students hold a rolling race by rolling four items down a steep hill. The four items are a solid homogeneous sphere
Papessa [141]

Answer

The answer and procedures of the exercise are attached in the following archives.

Step-by-step explanation:

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Under specific circumstances, waves will bend around obstacles. This type of bending is called
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That type of bending is called "diffraction" of waves.
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