3. On a hike you walk 5,000 m East, 3,000 m North, and 1,000 m West at a constant speed of 1 m/s. Calculate your velocity.(1 point) A.0.44 m/s East + 0.33 m/s North

B.1.0 m/s

C.1.0 m/s East + 1.0 m/s North

D.0.55 m/s

4.You ride your bike at a constant speed of 5 ms for 300 s from your house to the mailbox. What was your acceleration for the trip?(1 point)

A.0 m/s2

B.5 m/s2

C.60 m/s2

D.300 s

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.

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Can you match these to the correct definition