A physics lab instructor is working on a new demonstration. She attaches two identical conducting spheres with mass m = 0.190 g to cords of length Las shown in the figure. There are two strings in the figure. The top of each string is connected to the ceiling, and both strings are connected at the same point. The bottom of each string is connected to a spherical mass labeled m. Both strings have length Land hang at an angle of θto the vertical, with the two strings on opposite sides of the vertical. Both spheres have the same charge of 8.00 nC, and are in static equilibrium when θ = 5.45°. What is L (in m)? Assume the cords are massless. m (b) What If? The charge on both spheres is increased until each cord makes an angle of θ = 10.9° with the vertical. If both spheres have the same electric charge, what is the charge (in nC) on each sphere in this case? nC

Calculate the force and moment reactions at the bolted base of the overhead traffice-signal assembly. Each traffic signal has a mass of 43 kg, while the masses of members DC and AC are 74 kg and 68 kg, respectively. Positive answers are to the right, up, and counterclockwise. 43 kg Answers: 0,- i O, i Mo-i 5.2 m 43 kg B 1.0 kN kN kN-m 68 kg 4.2 m 74 kg 8.4 m

You are on a spacecraft (Starship) to Mars when Houston informs you that a very large solar storm is coming. You are dead as a doornail if you don’t do something. In order to save your life, and the life of your fellow astronauts, you devise a plan to save yourself by creating a large, square solenoid between you and the sun. The arrangement is depicted below. The incoming solar protons have a mass of mp = 1.673 x 10-23 kg, and maximum energy of Ep = 1.6022 x 10-15 J. The thickness of the solenoid is d=10cm. What needs to be the minimum strength of the magnetic field in order to stop this incoming radiation? (think of what the protons would do once they enter the magnetic field of the magnet)

I Review Part C A0.32 µC particle moves with a speed of 18 m/s through a region where the magnetic field has a strength of 0.99 T. You may want to review (Pages 773 - 777). At what angle to the field is the particle moving if the force exerted on it is 1.0 x 10-'N? Express your answer using two significant figures. | O You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Previous Answers Request Answer