Using Newton's 2nd law, find and expression for vcrit t, the speed of the block at the critical moment when the block leaves the surface of the globe. Assume that the height at which the block leaves the surface of the globe is hcrit.

Express speed in terms of R, hcrit, and g, the magniture of acceleation due to gravity.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it