An electric heater draws a current of $5 A$ from a $220 V$ power supply. What is the electric power consumed by the heater?

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An object accelerates uniformly from rest at $3 m/s^{2}$ along a straight line. What distance does it cover in $4 seconds$ ?
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According to Newton's universal law of gravitation, if the distance between two point masses is tripled, how does the gravitational attracti…
A sound wave travels through air at $340 m/s$ with a frequency of $170 Hz$ . What is the wavelength of this sound wave?
A ray of light in air strikes a glass plate at an angle of incidence of $3 0^{\circ}$ . If the refractive index of the glass is $1.5$ and…