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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.
Vector A points in the negative y direction and has a magnitude of 3 units. Vector B has three times the magnitude and points in the positive x direction. Find out the direction and magnitude of the following vectors.
What is the acceleration of the truck. If it starts 4.50 m from the lower edge of the roof, how fast would the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 18.0 N.
A certain car battery with a 12.0 V emf has an initial charge of 178 A•h. assume that the potential across the terminals stays constant until the battery is totally discharged, for how long in hours can it deliver energy at the rate of 115 W.
A 3.3 block of wood sits on a table. A 3.0 bullet, fired horizontally at a speed of 480, goes completely through the block, emerging at a speed of 200 .What is the speed of block immediately after the bullet exits.
What is the magnitude of displacement
Find out the friction force on the box
Find out the induced emf in the loop at an instant
What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is going down as it did when it was going up.
Find out the potential difference between r2 and r1
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
What is magnitude of the breaking force
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0267 m2 in contact with the ground. Find out the weight of the automobile.
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