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1. The length scale on which the quantized nature of gravity should ?rst become evident is called the Planck length.
(a) Determine it using dimensional analysis using the fundamental constants G, h, and c.
(b) Determine it by ?nding the de Broglie wavelength of the Planck mass of Problem 25. Are the values close to the value of 10-35 m?
2. Use the fundamental constants G, h, and c and dimensional analysis to determine a time constant called the Planck time. How much time would it take light to travel the Planck length discovered in the previous problem? Are these two times consistent?
What is the magnitude of the electric field at the centre ofa square of side 45.00 cm if one corner is occupied by a chargeQ1 = 20.00 uC and the other three corners areoccupied by three charges each of charge Q2=-20.00 uC.
Superman throws a 0.18 kg baseball at a speed of 0.936c. Find the following for the baseball. rest energy. kinetic energy
Briefly explain how we modify the Energy Conservation equation when there is work don't by forces outside of our system of interest? Be clear on what the modification means in terms of the total energy within our system.
The ground reaction force actin gon the long jumper is 4500N acting forward and upward at an angle of 78 degrees from horizontal. What is the vertical component of the ground reaction force
If the dummy is thrown forward with force of 130.0 N while simultaneously being hit from the side with a force of 4500.0 N, illustrate what force will the sensor report?
Three forces acting on an object are given by F1 = (-2.00 i +2.00 j)N; F2 = (5.00i -3.00j)N; F3 = (-45.0i)N. Find the velocity components of the object after 10.0 second
A train is moving parallel and adjacent to a highway with a constant speed of 23 m/s. Initially a car is 57 m behind the train, What is the speed of the car just as it passes the train
A car is traveling at a steady 70km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.2m/s2. How far is the motorcycle from the car when it reaches this speed
A wire lying along a y axis from y = 0 to y = 0.276 m carries a current of 1.62 mA in the negative direction of the axis. The wire fully lies in a nonuniform magnetic field given by = (0.466 T/m)y + (0.293 T/m)y. What is z components of the magnetic ..
A 10.0 kg shell is fired vertically upward. At its max height of 500.0 m, it explodes into 3 pieces. Where does the third piece land
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
A spherical water drop, 1.80 ?m in diameter, is suspended in calm air owing to a downward-directed atmospheric electric field E = 452 N/C. What is the weight of the drop
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