A sound wave traveling through a solid material has a frequency of 400 hertz. the wavelength of the sound wave is 2 meters. what is the speed of sound in the material? a. 200 m/s
b. 200 Hz
c. 800 m/s
d. 800 Hz​

Why do electron microscopes have higher resolving power than light microscopes?

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)