5. 36mph
6. PER-for each
7. 2000 divided by 330 equals 6.06 seconds
Answer:
Explanation:
a) According to ohm's law
V = IR
V is the supply voltage
R is the resistance
I is the current
Given Resistance = 200ohms
Voltage = 20V
I = V/R
I = 20/200
I = 0.1Amperes
b) Using the ohm's law formula
V= IR
Where voltage = 12volts
Current I = 3A
Resistance R = V/I
R = 12/3
R = 4ohms
c) Power generated by the battery is expressed as P = IV
I = P/V
Given Power = 2Watts
V = 1.5volts
I = 2/1.5
I = 1.33A
d) similarly, power = current I × voltage V
V = P/I
Given P = 90watts
I = 4.5A
V = 90/4.5
V = 20volts
e) Given power = 1.5kW = 1500watts
Voltage = 300volts
I = P/V
I = 1500/300
I = 5A
Answer:
D. Validity group
Explanation:
A validity group is not necessarily a component of a normal experiment.
A normal experiment is made up of the dependent variables, independent variables, and most times the control group.
- The dependent variable is one that relies on the outcome of the effect produced from the experimental design
- The independent variable is the one that causes a desired effect under the study.
- The control group is a group that does not receive any treatment nor attenuation of the conditions.
Answer:
c) The wavelength decreases but the frequency remains the same.
Explanation:
Light travels at different speed in different mediums.
Refractive index is equal to velocity of the light 'c' in empty space divided by the velocity 'v' in the substance.
Or ,
n = c/v.
<u>The frequency of the light does not change but the wavelength of the light changes with change in the speed.</u>
c = frequency × Wavelength
Frequency is constant,
The formula can be written as:
n = λ / λn.
Where,
λn is the wavelength in the medium
λ is the wavelength in vacuum
<u>When the light travels to glass, it speed slows down and also the wavelength decreases as both are directly proportional. There will be no effect on frequency.</u>
