1.
Which statement describes something designers should do when
developing a new product?
A. They should make the product and then use advertisements to
prove that it is useful and beneficial.
B. They should consider limitations such as cost, production
time, and materials required.
They should decide whether people will like the product in
order to determine whether it is scientifically sound.
D. They should produce and distribute many copies of the
product and then ask people for feedback about its benefits
and risks.

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

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

Consider this initial-rate data at a certain temperature for the reaction described by