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Q1. A car is travelling with a velocity of + 88.0 km/h. It accelerates at a constant rate of 20 m/s2. If the acceleration lasts for 5.6s, what is the final velocity of the car?
Q2. a.) The light from a 200-W lamp spreads uniformly in all directions. Suppose that 5 percent of the lamp power is converted to light, find the irradiance of the optical E&M wave and the amplitude of the electric field at a distance of 11 m from the lamp.
b.) assume now a 2000-W laser beam is concentrated by a lens into a cross-sectional area of 10^-6 cm^2. Find out the corresponding irradiance and amplitude of E-field and B-field.
A horizontal uniform bar of mass 2.7 and length 3.1 is hung horizontally on two vertical strings. String 1 is attached to the end of bar, and string 2 is attached a distance 0.7 from other end. A monkey of mass 1.6 walks from one end of the bar to th..
Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 11.1 s interval
An electric field applies a force of 9.11x10^-16 N to an electron emitted from a cathode of a cathode ray tube at essentially zero velocity
q1. the scalar product of vectors and is 51.0. vector has magnitude 9.00 and direction 28.0 west of south. if vector
Two forces, 375 N at 11deg and 323 N at 25deg are applied to a car in an effort to accelerate it. If the car has a mass of 3730kg, what magnitiude of acceleration does it have
If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, illustrate what is the lumberjack’s speed relative to the shore?
A meterstick (L = 1 m) has a mass of m = 0.121 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark. What is the tension in the left string?
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 220 m/s. Find the emf induced between the wing tips
The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have witho..
A glass window pane has an area of 3.0m^2 and a thickness of .60 cm. how much heat flows through the window per hour
A glass plate 2.5 cm long is separated from another glass plate by a strand of someone's hair (diameter 0.010 mm). How far apart are the adjacent interference bands
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
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