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You place a small lightbulb 70 cm from a concave mirror and find a real image 17 cm from the mirror. Where should you place the bulb so its real image is 70 cm from the mirror?
An electron in a 1-D box of length 0.100 nm, Find the energies of the four lowest states that have energies above the ground states
A 100-W lightbulb has a resistance of about 12 ?when cold (20 ?C) and 156? when on (hot). Estimate the temperature of the filament
What if the acceleration is not constant? A particle starts from the origin with velocity 6i m/s at t = 0 and moves in the xy plane with a varying acceleration given by a = (2?tj) m/s2, find the position of the particle as a function of time
he primary coil of a transformer has N1 = 390 turns, and the secondary coil has N2 = 2 260 turns. what rms voltage is developed across the secondary coil
Use the pivot as the reference point because then two of the four forces on the plank exert zero torque. Which two? Since the plank is at rest, Find the normal force acting at the pivot point
The density of a 5.0-m long rod can be described by the linear density function ?(x) = 125 g/m + 14.5x g/m2. Determine the total mass of the rod
A guitar string is 0.7m long and is tuned to play an E above middle C (330Hz).
The masses of astronauts are monitored during long stays in orbit, such as when visiting a space station. What is the mass of an astronaut who has an oscillation period of 2.00 s when in the chair
The potential energy of the strong interaction between two quarks has the approximate form V(r)=br, where b is some constant. Assume that we have a light quark of mass m interacting with a very massive quark. using the same basic approach that we use..
A second force F2 is added to F1 . The resultant of the two vectors has a magnitude of 370 newtons and points along the (a) east/ (b) west line. Find the magnitude and direction of F2.
A small grinding wheel has a moment of inertia of 4.0×10?5. What net torque must be applied to the wheel for its angular acceleration to be 150
two point charges q1 4.00nc and q2 ?3.00nc are placed 20.0cm apart as shown in figure 1. there also exists a third
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