George is playing the piano. the note A5 has a frequency of 880 hertz. if the speed of sound at 30 degrees c is 350 meters/second, what is the wavelength of this note at that temperature? Enter the variable symbol for the quantity you need to find. Use your keyboard and the keypad to enter your answer. then click Done.

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm