Answer:
Trial 1: 2 Volts, 0 %
Trial 2: 2.8 Volts, 0%
Trial 3: 4 Volts, 0 %
Explanation:
Th experimental values are given in the table, while the theoretical value can be found by using Ohm/s Law:
V = IR
<u>TRIAL 1</u>:
V = IR
V = (0.1 A)(20 Ω)
<u>V = 2 volts</u>
% Difference = x 100%
% Difference = |(2 - 2)/2| x 100%
<u>% Difference = 0 %</u>
<u>TRIAL 2</u>:
V = IR
V = (0.14 A)(20 Ω)
<u>V = 2.8 volts</u>
% Difference = x 100%
% Difference = |(2.8 - 2.8)/2.8| x 100%
<u>% Difference = 0 %</u>
<u></u>
<u>TRIAL 3</u>:
V = IR
V = (0.2 A)(20 Ω)
<u>V = 4 volts</u>
% Difference = x 100%
% Difference = |(4 - 4)/4| x 100%
<u>% Difference = 0 %</u>
A surfer is riding a wave with an amplitude of 6 feet and a period of 24 feet. If the wave completes a period in 8 seconds.The speed of the surfer is 3ft/sec.
A wave's amplitude is defined as its largest displacement on either side of its mean location.
The quantity of oscillations a wave makes in a second is referred to as frequency of wave.
The amount of time it takes to complete one vibration, from A to B, is referred to as time period.
As we know,
ν = λf
where, ν = speed
λ = wavelength
f = frequency
also,
Putting in the values in equation ν = λf gives us,
ν = 24 × ( period of wave must means wavelength of 24ft)
ν = 3ft/sec.
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Answer:The higher up an object is the greater its gravitational potential energy. The larger the distance something falls through the greater the amount of GPE the object loses as it falls. As most of this GPE gets changed into kinetic energy, the higher up the object starts from the faster it will be falling when it hits the ground. So a change in gravitational potential energy depends on the height an object moves through.
Explanation: Lifting an apple up 1 metre is easier work than lifting an apple tree the same height. This is because a tree has more mass, so it needs to be given more gravitational potential energy to reach the same height.
An escalator that takes 1.2 MJ every minute has a power output of 1200 kW.
An escalator used to lift people up from one floor to another, exerts a work (w) of 1.2 MJ in 1 minute (t).
In physics, power (P) is the amount of energy (w) transferred or converted per unit time (t).
We can convert 1.2 × 10⁶ W to kW using the conversion factor 1 kW = 1000 W.
An escalator that takes 1.2 MJ every minute has a power output of 1200 kW.
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