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dolphi86 [110]
3 years ago
15

Lightning is an example of what phenomenon?

Physics
1 answer:
eduard3 years ago
8 0
A release of a large amount of energy
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A block lies on a frictionless floor. a force of 5 n pulls toward the east while a force of 4 n pulls toward the north. what is
sveticcg [70]

Given below the arrangement of loading on the larger boat by two tug boats.

F₁ = 5 N

F₂ = 4 N

Angle between them θ = 90⁰

Resultant between two vectors, F=\sqrt{F_1^2+F_2^2+2F_1F_2cos\theta }

Substituting

   F = \sqrt{5^2+4^2+2*5*4*cos 90} \\ \\ = 6.403 N

So magnitude of the net force on the block = 6.403 N

3 0
3 years ago
A 20-kg barrel is rolled up a 20-m ramp to the back of a truck whose floor is 5.0 m above the ground. What work is done in loadi
oee [108]

The angle of inclination is calculated using sin function,

sin θ = 5 m / 20 m = 0.25

θ = 14.4775° 

 

<span>The net force exerted is then calculated:
F net = m g sin θ = 20 * 9.8 * 0.25 </span>

F net = 49N 

<span>Work is product of net force and distance:
W = F net * d = 49 * 20 </span>

<span>Work = 980 J </span>

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3 years ago
Find the average speed of a walk to school and back if you took 12 minutes to walk there and 18 minutes to get back
nikdorinn [45]

Answer:

12+ 18 divide by 2 is the average minutes

7 0
3 years ago
We know that the magnitudes of the negative charge on the electron and the positive charge on the proton are equal. Suppose, how
TEA [102]

Answer:3,45 x 10^9 N

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Finally we use the Coulomb law,

F=k Q/ (r)^2

6 0
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What is the speed of a bobsled whose distance-time graph indicates that it traveled 119m in 29s?
Assoli18 [71]
Do 112m /29s which it will be 3.862 which if you round it, it will be 3.86 m/s
7 0
3 years ago
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