Answer:
9.49 s
Explanation:
Applying,
s = ut+gt²/2................ Equation 1
Where s = heigth of the deck, u = initial velocity, t = time, g = acceleration due to gravity.
From the question,
Given: s = 450 m, u = 0 m/s( dropped from height)
Constant: g = 10 m/s²
Substitute these values into equation 1
450 = (0×t)+10t²/2
450 = t²
5t² = 450
t² = 90
t = √90
t = 9.49 s
A. a testable statement of experimental results.
<span>A deviation between observed and model values that was much larger than the observation uncertainties led Kepler to abandon circular orbits and his discovery that planetary orbits are ellipses</span>
Newton's second law of movement numerically expresses the connection among power and changes in moving. An adjustment in speed implies, by definition, that there is an increasing speed. An outer power acts from outside the arrangement of interest, an inside power acts between components of the framework. Just outer powers influence the movement of a framework, as per Newton's first law, but the inward powers really drop, as we will find.
Answer:
If you run a 500 W computer for 4 hours, your electric meter will read 2kWh; this is a measure of energy "used". The correct answer is D.
Explanation: Energy is defined as the capacity of doing work and is occurs in different forms( electrical, kinetic, potential energy). Electrical energy consumption can be calculated or measure through the multiplication of the power( W or kW) used by the number of hours during which the power is consumed. Therefore the unit of energy is kWh. From the question,
500W was used for 4 H
Therefore energy consumed
500× 4= 2000Wh. To convert to kWh
Divide by 1000,
2000÷ 1000= 2.
There energy consumed in kWh is,
2kWh energy.