(13%) Problem 4: Suppose a microwave oven has a power output of 0.85 kW at a...
3. (3 points) The power output of a microwave oven is 1.50 kW when it operates at frequency 2550 Hz. How many photons per second are emitted by the antenna?
An FM radio transmitter has a power output of 140 kW and operates at a frequency of 100.3 MHz. How many photons per second does the transmitter emit? photons/s
Summer 19 PHY203 Test 3 P1. A 90OW microwave oven has a frequency of 2.56GHZ. a. Assumming 100% efficiency, how many photons per second does it emit b You put a 0.25kg Lean Cuisine meal at-10°C into the oven and heat it to 90° eat capcity of the meal is 400 How many photons did the meal abso K kg 3 t
i need help with this problems Problem 7 Two microwave frequencies are authorized for use in microwave ovens: 900 MHz and 2,560 MHz. a) On its highest power setting, a microwave oven can produce 1.00 kW of power onto a 30.0 by 40.0 cm area. What is the intensity in W/m2? b) Calculate the peak electric and magnetic field strength in these waves. c) The maximum safe intensity of microwaves for human exposure is 1.00 W/m. If a radar unit...
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser? ________ photons/s
Question 17 A university campus radio transmitter transmits at a power of 2217 Watts at a frequency of 91.7 MHz. How many photons are emitted by the transmitter each second? Planck's constant is 6 10-34 J s Select one: a. 1.3e-28 photons per second b. 3.6e28 photons per second c.3.6e34 d. 9.2e30 e. 3.6e40 photons per second Time left 1:50:46
Radio station KNAU’s effective radiative power (a measure of how much radio energy it delivers to its listening area) is 100 kW. It broadcasts at 88.7 MHz. Suppose KNAU had a spigot that poured out water molecules as quickly as its antenna pours out photons. How many liters/second of water would it produce?
Problem 2: A Helium-Neon laser gives a wavelength of 633 nm and has a power of 20 milliWatt. Find (a) The frequency of laser light and (b) The total number of photons emitted per second.
A typical green laser pointer has a power output of 1.00W and a wavelength of 530 nm. How many photons per second does the laser emit (in units of 10^18 photons/sec)? (A) 1.29 (B) 2.67 (C) 3.86 (D) 4.38 (E) 5.38
A gasoline engine has a power output of 170 kW (about 2.28×105 hp ). Its thermal efficiency is 22.0 %. 1- How much heat must be supplied to the engine per second? Express your answer in joules per second. 2-How much heat is discarded by the engine per second? Express your answer in joules per second.