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A turtle and a rabbit are to have a race. The turtle's average speed is 0.9 m/s. The rabbit's average speed is 9 m/s. The distance from the starting line to the finish line is 1500 m. The rabbit decides to let the turtle run before he starts running to give the turtle a head start. What, approximately, is the maximum time the rabbit can wait before starting to run and still win the race?
A charge Q is transferred from an initially uncharged plastic ball to an identical ball 11cm away. The force of attraction is then 42mN. How many electrons were transferred from one ball to the other
A circuit consists of an 100- resistor in series with a 5.5-?F capacitor, the two being connected between the terminals of an ac generator. The voltage of the generator is fixed.
What are the basic components of Fire as a chemical and chain reaction? What are the major phases of Fire? What are the main factors the influence how Fire is spread and Fire behavior.
If the lightning strike has a cross-sectional radius of 6cm (Uman), what is the volume charge density of a lightning strike at peak linear charge density?
How many Galilean moons are there, and why are they called Galilean? What is the total number of moons of the terrestrial planets? How many moons does Mars have, and what are their names?
A 20 g bullet traveling at 159 m/s is fired into a 0.413 kilogram wooden block anchored to a 99 N/m spring. determine what is the angular frequency
Use gauss law to find the electric field in the space surrounding an infinite line of the charge with a uniform charge density
A classroom slide projector projects an enlarged (50 times taller) image of a 24mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does the slide projector require to produce a sharply focus i..
A uniform magneticfield of magnitude 1.52 T acts in the positive z direction. Find the magnitude of the force exerted by the field on a proton if the proton’s velocity is (2.3 Mm/s) ˆi.
An Earth satellite has a speed of 28100 km/hr when it is at its perigee, 281 km above Earth's surface. Find the apogee distance
A 0.155 kg projectile is fired with a velocity of +702 m/s at a 1.94 kg wooden block that rests on a frictionless table. The velocity of the block, immediately after the projectile passes through it, is +42.9 m/s. Calculate the velocity with whic..
A wire loop has a resistance R = 10W and the area of the loop is 0.5 m^2, intially there is no magnetic field through the loop but at time t = 0 we start to increase the field at a uniform rate that it reaches B = 5T out of the page in 100s. What ..
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