1. What is the wavelength of a sound wave with a frequency of 50 Hz, if the Speed of sound is 343 m/s. 2.A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 m. What is the speed of sound in steel?

3.A wave has a frequency of 10 Hz and a wavelength of 30m. What's its speed?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

You are driving directly behind a pickup truck, going at the same speed as the truck. a crate falls from the bed of the truck to the road. (a) will your car hit the crate before the crate hits the road if you neither brake nor swerve? (b) during the fall, is the horizontal speed of the crate more than, less than, or the same as that of the truck?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c