Mrs. nogaki pushes one 10 kg box of books and one 20 kg box of books across a floor with equal force. what is true of the momentum of the boxes?
a. the first box has half the momentum of the second box
b. the first box has double the momentum of the second box
c. the first box has a quarter of the momentum of the second box
d. the first box has a quadruple the force of the second box
e. the boxes have the same momentum since the same force was used

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.

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

When a vertical beam of light passes through a transparent medium, the rate at which its intensity i decreases is proportional to i(t), where t represents the thickness of the medium (in feet). in clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity i0 of the incident beam. what is the intensity of the beam "10" feet below the surface? (give your answer in terms of i0. round any constants or coefficients to five decimal places.)