The best and most correct answer among the choices provided by your question is the second choice or letter C. A solar-powered car converts light energy to mechanical energy.
Solar cars use photovoltaic cells to convert sunlight into energy. Photovoltaic cells are the components in solar panels that convert the sun's energy to electricity<span>. They're made up of semiconductors, usually silicon, that absorb the light.
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Answer:
The frequency is 302.05 Hz.
Explanation:
Given that,
Speed = 18.0 m/s
Suppose a train is traveling at 30.0 m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 Hz .
We need to calculate the frequency
Using formula of frequency

Where, f = frequency
v = speed of sound
= speed of passenger
= speed of source
Put the value into the formula


Hence, The frequency is 302.05 Hz.
To solve this problem we will apply the kinematic equations of linear motion and centripetal motion. For this purpose we will be guided by the definitions of centripetal acceleration to relate it to the tangential velocity. With these equations we will also relate the linear velocity for which we will find the points determined by the statement. Our values are given as


PART A )


Calculate the velocity of the motorcycle when the net acceleration of the motorcycle is 




Now calculate the angular velocity of the motorcycle



Calculate the angular acceleration of the motorcycle



Calculate the time needed by the motorcycle to reach an acceleration of




PART B) Calculate the velocity of the motorcycle when the net acceleration of the motorcycle is 




PART C)
Calculate the radial acceleration of the motorcycle when the velocity of the motorcycle is 



Calculate the net acceleration of the motorcycle when the velocity of the motorcycle is 



PART D) Calculate the maximum constant speed of the motorcycle when the maximum acceleration of the motorcycle is 




Since the current is inversely propotional to its resistance, when the voltage is doubled the current will be one-half
Answer:
The base unit for time is the second (the other SI units are: metre for length, kilogram for mass, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for the amount of substance). The second can be abbreviated as s or sec.
Explanation: