Afather and his seven-year-old daughter (who have different masses) are facing each other on ice skates. with their hands, they push off against one another. which one or more of the following statements is (are) true?
(a) each experiences an acceleration that has a different magnitude.
(b) each experiences an acceleration of the same magnitude.
(c) each experiences a pushing force that has a different magnitude.
(d) each experiences a pushing force that has the same magnitude.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

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.

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?