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Superman must stop a 100km/h train in 150 m to keep it fromhitting a stalled car on the tracks. If the train's mass is3.6 x 10(to the 5th) kg, how much force must he exert? Compare tothe weight of the train.
Angry Bird is launched horizontally with a slingshot with a speed of 1.87 m/s. If the initial height of the Angry Bird is 20.41 cm, how far away will the target need to be, in meters
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
The average kinetic energy per molecule of an ideal gas with originally Ni=1000 molecules is Kavg=500J. What is the final number of molecules Nf after this process
A 0.2 kg steel ball is dropped straight down onto a hard, horizontal floor and bounces straight up. FIND the magnitude of the impulse delivered to the floor by the steel ball
The atomic mass of ammonia is 17 atomic mass units. What is the atomic mass of nitrogen if a molecule of ammonia consists of one atom of nitrogen and three atoms of hydrogen?
An electron moving through an electric field experiences an acceleration of 4.3 103 m/s2. Find the electric force acting on the electron
questionexactly 3.0s after a projectile is fired into the air from a flat ground it is observed to have velocity v
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
q1. metal rod is 41.126 long at 23.0 and 41.149 long at 46.4 calculate the average coefficient of linear expansion of
A sound wave of frequency 400 Hz has an intensity of 2.00 µW/m2. What is the amplitude of the air oscillations
When a water gun is fired while being held horizontally at a height of 1.00 m above ground level, the water travels a horizontal distance of 4.90 m. how far will the water travel horizontally
A 0.271 kg bead slides on a curved wire, starting from rest at point A as shown in the figure. The acceleration of gravity is 9.8 m/s2 . If the wire is frictionless, find the speed of the bead at B. Find the speed of the bead at C. A5.58 m B C1.09 m
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