Which are true of electromagnetic waves? Select all that apply.
They have different wavelengths.
They have the same frequency.
They all travel at the same speed.
When they travel outside of a vacuum, their speeds increase.

The most common experimental technique to perform elemental analysis is combustion analysis, where a sample is burned in a large excess of oxygen and the combustion products are trapped in a variety of ways. A 99.99% pure, 0.4808 g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in the formation of 0.6859 g CO2, 0.6973 g H2O, and 0.4646 g NO. What is the empirical formula of the sample URGENT!!! plz help will give brainlist question is in photo 5m+15m=0t-5t+6=05p+12p+4=02a+10a-48=0x(2x+5)=0 Choose all the events that led to the growth of Christianity in the Roman world.es -))A)the crucifixion of JesusB)the conversion of Constantine)the use of underground tombs to worshipD)Nero blaming Christians for the fire of RomeE)the persecution of Jews who refused Roman gods Which model represents a possible chemical reaction ______ is a natural resource that is used to produce energy ?Natural resourceEnergy resourceNonrenewable resourceRenewable resource what is 5^2 simplified The two legs of a right triangle measure 7 inches and 5 inches. Find the measure of the acute angle that is included between the longer leg and the hypotenuse. WILL GIVE BRAINIEST TO FIRST RIGHT ANSWER Which exponential expression is equivalent to the one below? (6x3)^525 POINTS!!!!!! I just wanna make sure im doing this right What are the values of x and y if you answer is not a whole number write it as a decimal and round if neccasasry what were two things that the colonist tried to do before they sent the king their list of grievances(complaints)? For viewers of Conceptual Art, what isneeded most is plz help i gotta turn dis in now (no links) Find the solution of this system of equations.Separate the x- and y-values with a comma.x = -10 + y-16x 2y = -2 short sentence from Accustomed and Crumb Find the volume of the figure. A) 288 cm^3 B) 480 cm^3 C) 544 cm^3 D) 640 cm^3 Which of the following did the North's General William T. Sherman accomplish in 1864? A. He conquered Richmond. B. He faced Lee's Army of Northern Virginia in order to defend Washington from Southern invasion. C. He conquered Atlanta and then marched through Georgia to Savannah. D. He killed General Joseph Johnston in battle. LA You are giving your very first five-minute speech in history class and you really want your peers to like it. When you look out at the class, what would you like to see? N The seagull population on a small island in the Atlantic Ocean can be calculated using the formulaP(t) = 5.3/11/?, where P is the population in hundred thousands, and t is in years. What will the seagullpopulation on the island be after 5 years? (Round to the nearest tenth.)a. about 41.6 hundred thousandc. about 172.4 hundred thousandabout 3.7 x 10' hundred thousand d. about 66.5 hundred thousand