Answer:
7500 m/s
Explanation:
We can use the equation velocity of a wave equals wavelength times frequency. Therefore, v = wavelength*f = (25 m)(300 Hz) = m/s7,500
The statement that best explains the movement of electric current is that the ground is positively charged and the clouds are negatively charged.
<h3>What is lightning storm?</h3>
Lightning storm can be defined as the electrical outlet that occurs due to unsteadiness of the storm clouds and the ground.
Lightning storm occurs when opposite charges build up enough in the air leading to rapid discharge of electricity.
Learn more about storms here:
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Answer:
9.93 m/s
Explanation:
The following data were obtained from the question:
Mass (m) = 1500 Kg
Initial velocity (u) = 5.25 m/s
Force (F) = 1250 N
Distance (s) = 42.8 m
Final velocity (v) =...?
Next, we shall determine the acceleration of car. This can be achieved as shown below:
Force (F) = mass (m) x acceleration (a)
1250 = 1500 x a
Divide both side by 1500
a = 1250/1500
a = 0.83 m/s²
Therefore, the acceleration of the car is 0.83 m/s²
Now, we can determine the final velocity of car as shown below:
Initial velocity (u) = 5.25 m/s
Distance (s) = 42.8 m
Acceleration (a) = 0.83 m/s²
Final velocity (v) =...?
v² = u² + 2as
v² = (5.25)² + 2 x 0.83 x 42.8
v² = 27.5625 + 71.048
v² = 98.6105
Take the square root of both side
v = √98.6105
v = 9.93 m/s
Therefore, the final velocity of the car is 9.93 m/s