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A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.30 s. At the end of this time, the boat continues for an additional 6.10 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.45 s.
What is the velocity of the boat at t = 21.85 s? Find the total displacement of the boat.
The index of refraction for red light in water is 1.331, what are the underwater angles of refraction for the blue and red components of the light
a man scientist decides to build a machine that will use a 0.5 tesla magnetic field to make electrons charge 1.6 x
determine the resultant displacement graphically.what is the magnitude of repulsive force pushing these two spheres apart.
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
A 70.0kg archer, standing on frictionless ice, shoots a 100g arrow at a speed of 50m/s. What is the recoil speed of the archer
A cooling fan is turned off when it is running at 800rev/min . It turns 900 revolutions before it comes to a stop, What was the fan's angular acceleration, assumed constant
a particular inverting circuit uses an ideal op amp and two 10-kq resistors. what closed-loop gain would you expect? if
A block with mass m = 16.0 kg rests on a frictionless table, What distance does the spring need to be compressed so that the block will just barely make it past the rough patch when released
Two air carts of mass m1=.84 kg and m2=.42 kgare placed on a frictionless track. How much energy is stored in the spring bumper
A spaceship is 1600 m long when it is at rest. When it is traveling at a certain constant speed its length is measured by external observers, What is the speed of the spaceship in terms of the speed of light
An electron confined in a one-dimensional box emits a 400nm photon in a quantum jump from n=1 to n=2. What is the length (L) of the box in nm
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