BJC Review

what is sound heard distinctly after being reflected form an object?

• echo

• sound

• vibration

• decibels

Tags

NGSS.MS-PS4-2

The rate of doing work

• joules

• newton

• power

• time

A lens that is curved outward, causing light rays to converge and objects to appear magnified, is a_____ lens

• concave

• convex

• circular

• cylindrical

A measure of how well a machine converts input work is the machine's_____

• efficiency

• effectiveness

• usefulness

• limitless

what is the SI unit of force?

• newtons

• joules

• newtons/meter

• meters

what is the SI unit of work?

• newtons

• newtons/ meter

• newton/hour

• miles/ hour

what is the SI unit of distance?

• newtons

• newtons/ meter

• miles/ hour

• meters

what is the average speed of a person who walks 28 km in 7.0hr ?

• 4.0 km/hr

• 40 km/hr

• 196 km/hr

• 196.4 km/hr

The angle of incidence equals the angle of reflection

• law of reflection

• law of refraction

Tags

NGSS.MS-PS4-2

For every action there is an equal and opposite reaction

• 1st law of motion

• 2nd law of motion

• 3rd law of motion

Tags

NGSS.MS-PS2-1