 # mathematics help Anonymous
timer Asked: Jun 3rd, 2014
account_balance_wallet \$5

### Question Description

1) An antenna is connected to a car battery. Will the antenna emit electromagnetic radiation? Why or why not? Explain.

2) A light-year is a measure of distance (not time). How many meters does light travel in a year?

3) How long does it take a laser beam to travel to the Moon and back? Take the Earth Moon distance to 384,000 km.

khakaan
School: Rice University   1. the antenna will not emit electromagnetic radiation... the battery gives of direct voltage and cannot give suffiencient means to provide the antenna to make electromagnetic radiation. an antenna needs an alternating current for it to produce electromagnetic radiation.

2. light year equals 300,000 m/s: 300000 m/s * 3600s/1hr * 24hr/1day * 365day/year = 9.4608x10^12 m

3. 384,000 km ---> 3.84x10^8 m: so to and bck is 3.84x10^8 + 3.84x10^8 = 7.68x10^8... the speed of beam will be the speed of light which is 3x10^8 m/s.. so 7.68x10^8 m / 3x10^8 = 2.56 s

flag Report DMCA  Review Anonymous
awesome work thanks Brown University

1271 Tutors California Institute of Technology

2131 Tutors Carnegie Mellon University

982 Tutors Columbia University

1256 Tutors Dartmouth University

2113 Tutors Emory University

2279 Tutors Harvard University

599 Tutors Massachusetts Institute of Technology

2319 Tutors New York University

1645 Tutors Notre Dam University

1911 Tutors Oklahoma University

2122 Tutors Pennsylvania State University

932 Tutors Princeton University

1211 Tutors Stanford University

983 Tutors University of California

1282 Tutors Oxford University

123 Tutors Yale University

2325 Tutors