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Q. A car is travelling at 26 m/s when the driver spots a large pothole in road a distance 34 m ahead. She at once applies her brakes. If her acceleration is -7.5 m/s2, does she manage to stop before reaching the pothole?
Q. A baseball pitcher throws a fastball at a speed of 43m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 3.9 m. Estimate the acceleration, assuming that it is constant and uniform.
A 23 kg body is moving in the direction of the positive x axis with a speed of 292 m/s when, owing to an internal explosion, it breaks into three pieces.
A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.
Calculate the total amount of energy that flows into the space between the capacitor plates from to , by first integrating the Pointing vector over the surface that connects the edges of the two circular plates, and then integrating over time.
What magnitude of charge must be given to the drop
A hawk flies in a horizontal arc of radius 14 m at a constant speed of 5 m/s. (a) Find out its centripetal acceleration. (b) It continues loftly along the same horizontal arc but increases its speed at the rate of 1 m/s2. Find out the acceleration..
What is an average speed
A parallel-plate capacitor is formed from two 4 electrodes spaced 1.20 mm apart. The electric field strength inside the capacitor is 1.29x 10^6. What is the charge (in nC) on each electrode.
A particle moves along the x axis. Its position is given by the equation 2.00 + 3.00t - 4.00t^2 with x in meters and t in seconds. Find out (1) its position at the instant it changes direction and (2) its velocity when it returns to the position i..
In daily life we see many cases of people who are caught misrepresenting things who soon thereafter are excused and accepted by their contemporaries. How is This different in science.
How much kinetic energy is lost in the collision. compute the focal length of the mirror.
Suppose that 0.10mol of argon gas is admitted to an evacuated 50cm3 container at 20° C. The gas then undergoes isobaric heating to the temperature of 300°C. What is the final pressure of gas? What is the final volume.
An isolated conducting sphere has a 13 cm radius. One wire carries a current of 1.0000048 A into it while another wire carries a current of 1 A out of it. How long in seconds would it take for the sphere to enhance in potential by 820 V.
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