The flash on a compact camera stores energy in a 140 μF capacitor that is charged to 220 V. When the flash is fired, the capacitor is quickly discharged through a lightbulb with 5.5 2 of resistance. ▼ Part A Light from the flash is essentially finished after two time constants have elapsed. For how long does this flash illuminate the scene? Express your answer with the appropriate units. 2T = Submit Part B P = Submit O HA Value 0 Request Answer At what rate is the lightbulb dissipating energy 200 us after the flash is fired? Express your answer with the appropriate units. HÅ Value Units Request Answer ? Units ?

Unpolarized light with an initial intensity of 32 W/m2 is incident on a perfect polarizing material that allows light through with a vertical orientation. The light then passes through a second polarizer that is rotated 450 with respect to the first. Finally, the light passes through a third polarizer that is oriented at 900 with respect to the first. What is the intensity of light that makes it through the first polarizer? A. 0 What is the intensity of light that makes it through the second polarizer? B. 2 W/m2 |What is the intensity of light that makes it through all three polarizers? C. 4 W/m2 D. 8 W/m2 E. 16 W/m2 F. 32 W/m2

A 200 resistor, a 0.850 H inductor, and a 5.00 μF capacitor are connected in series across a voltage source that has voltage amplitude 28.5 V and an angular frequency of 260 rad/s. Part A What is v at t = 22.0 ms? Express your answer with the appropriate units. V = 0 Submit µÅ Value Units Previous Answers Request Answer ?

A beam of red light and a beam of blue light pass from air into water. Which statement is true?a. The red-light beam travels faster than the blue light in both media.b. The blue light beam travels faster than the red light in both media.c. Both beams travel at the same speed as each other, and at the same speed in water and air.d. Both beams travel at the same speed as each other, and faster in water than in air.e. Both beams travel at the same speed as each other, and slower in water than in air.

P Performance Matters Welcome, Bertiana! ► || A Tools - Question 2 of 51 Submit Test 04.CFE.2003380.2003390.2003836.2003840.Phy... A cell phone will typically have a power output of 1.4 watts when playing a song that lasts for 300 seconds. If the electrical resistance of the cellphone is 400 Q, what is the total charge needed to play the song?

A laser emits a cylindrical beam of light 3.8 mm in diameter. The average power of the laser is 3.0 mW. The laser shines its light on a perfectly absorbing surface. Part A How much energy does the surface receive in 15 s ? Express your answer using two significant figures. —| ΑΣΦ E = Submit Part B What is the radiation pressure exerted by the beam? Express your answer using two significant figures. VE ΑΣΦ pressure av Request Answer Submit = Request Answer ? mJ ? μРа

A transformer with a turns ratio (secondary/primary) of 1:13 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit. Part A What is the voltage supplied to the recharger? Express your answer using two significant figures. -ΨΓ ΑΣΦ V = Submit Request Answer ? V

A laser emits a cylindrical beam of light 3.0 mm in diameter. Part A If the average power of the laser is 2.0 mW , what is the rms value of the electric field in the laser beam? Express your answer using two significant figures. ? Erms = 4.43 kV/m Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Provide Feedback