Homework Help for Physics (page 3)
- All Subjects
- Computer Science
- Electrical Engineering
- Information Technology
- Mechanical Engineering
- Project Management
The figure shows the interior of a three-way incandescent lightbulb, which provides three levels of light intensity. The socket of the lamp is equipped with a four-position switch for selecting different light intensities, with the positions described as follows: (1) off (switches S1 and S2 both open), (2) switch S1 closed, (3) switch S2 closed, and (4) switches S1 and S2 both closed. The lightbulb contains two filaments. When the lamp is connected to a 120-V source, one filament receives 100 W of power and the other receives 75 W. What is the total power input to the light bulb when (a) only switch S1 is closed, (b) only switch S2 is closed, and (c) both switches are closed? (d) What If? Suppose the 75-W filament breaks and no longer is able to carry a current. How many switch positions will result in the light leaving the bulb and what will be the power input to the bulb in those positions?
(a) Find the maximum range of a super cannon that has a muzzle velocity of 4.0 km/s.
(b) What is unreasonable about the range you found?
(c) Is the premise unreasonable or is the available equation inapplicable? Explain your answer.
(d) If such a muzzle velocity could be obtained, discuss the effects of air resistance, thinning air with altitude, and the curvature of the Earth on the range of the super cannon.
- Get a Booster Class
- Get college credits
- Transfer credits to your school
- We updated the core navigation of the site.
- We updated our settings and notifications.
- We updated our search experience.
- New Study Guides.