Electromagnetic waves are oscillations of electric and magnetic fields in a direction perpendicular to the direction of motion of the wave (transverse waves). They are classified into 7 different types, according to their frequencies.

From lowest to highest frequency, we have:

Radio waves

Microwaves $10^9 Hz - 4\cdot 10^{13}Hz$

Infrared $4\cdot 10^{13} - 4\cdot 10^{14} Hz$

Visible light $4\cdot 10^{14} - 8\cdot 10^{14}Hz$

Ultraviolet $8\cdot 10^{14} - 2.4\cdot 10^{16} Hz$

X-rays $2.4\cdot 10^{16} -5 \cdot 10^{19}Hz$

Gamma rays $>5\cdot 10^{19} Hz$

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Derive an expression for the acceleration of the car. Express your answer in terms of D and vt Determine the time at which the s

Bezzdna [24]

Answer:

V(car) = V(truck) at t = Dt/2

acceleration = v(car) = D/t^2

Explanation:

acceleration = v(car) = D/t^2

Since the average velocities must be the same, the car's final velocity must be twice the trunk velocity assuming the car start with zero velocity, since acceleration remain the same throughout the journey velocities at half-time point must be equal.

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4 years ago