Awave has a wavelength of 4.9 m and a velocity of 9.2 m/s. the medium through which this wave is traveling is then heated to a greater temperature. what must be true about the frequency of this wave?
a. the frequency is less than 1.9 hz.
b. the frequency is greater than 1.9 hz.
c. the frequency is equal to 1.9 hz.
d. there is not enough information to determine the frequency of this wav

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat