biddle semester testie

Multiple Choice

the drive and driven gear turn in the

• same

• opposite

Multiple Choice

if the gear system results in a slower speed, the output force is

• reduced

• increased

Multiple Choice

an idler gear (does, does not) affect the speed and/or output force of the drive and driven gears

• does

• does not

Multiple Choice

worm gears can only be used as

• drive

• driven

Multiple Choice

drive gear is what type of force

• input

• output

Multiple Choice

driven gear is what type of force

• input

• output

Multiple Choice

a vertical force does work on an object that is moving in a horizontal direction

• false

• true

Multiple Choice

power is the rate of doing work

• false

• true

Multiple Choice

when you do less work in a given time period, the power increases

• false

• true

Multiple Choice

power and work are always the same

• false

• true

Multiple Choice

in order to do work faster what is required?

• force

• effort

• power

• distance

Multiple Choice

in order to do work faster what is required?

• force

• effort

• power

• distance

Multiple Choice

a passenger in the rear seat of a car moving at a steady speed is at rest relative to

• the side of the road

• a pedestrian on the corner ahead

• the front seat of the car

• the wheels of the car

Multiple Choice

one kilometer equals 1000 meters. what does the prefix kilo mean

• 1

• 10

• 100

• 1000

Multiple Choice

what is the most appropriate si unit to express the speed of a cyclist in the last leg of a 10-km race?

• km/s

• km/h

• mm/S

• cm/h

Multiple Choice

speed is the ratio of the distance an object moves to the

• amount of time needed to travel the distance

• direction the object moves

• displacement of the object

• motion of the object

Multiple Choice

a horizontal line on a distance time graph means the object is

• moving at constant speed

• moving faster

• slowing down

• at rest

Multiple Choice

what is an example of a first class lever

• scissors

• bottle opener

• tweezers

• wheelbarrows

Multiple Choice

what is an example of a second class lever

• scissors

• bottle opener

• tweezers

• pliers

Multiple Choice

the coefficients in a balanced chemical equation always can express the ratio of

• volume of reactants and products

• atoms of reactants and products

• mass of reactants and products

• moles of reactants and products

Multiple Choice

the coefficients in a balanced chemical equation always can express the ratio of

• volume of reactants and products

• atoms of reactants and products

• mass of reactants and products

• moles of reactants and products

Multiple Choice

what is an example of a third class lever

• scissors

• bottle opener

• tweezers

• pliers

Multiple Choice

chemical energy is contained in the

• bonds

• nuclei of the atoms

• unbonded electrons

• movement of the electrons

Multiple Choice

which of the following statements is true about what happens during a chemical reaction

• the bonds of both the reactant and the products are formed

• bonds of the reactants are formed, and bonds of the projects are broken

• the bonds of both the reactants and the products are broken

• bonds of the reactants are broken, and the bonds of the products are formed

Multiple Choice

if the temp of a chemical reaction is increased the reaction rate

• decreases

• stays the same

• increases

Multiple Choice

when the forward and reverse paths of a change occur at the same rate

• the change must be chemical

• the change must be physical

• the system is in equalilibrium

• the system is conserved

Multiple Choice

when the forward and reverse paths of a change occur at the same rate

• the change must be chemical

• the change must be physical

• the system is in equalilibrium

• the system is conserved

Multiple Choice

when the forward and reverse paths of a change occur at the same rate

• the change must be chemical

• the change must be physical

• the system is in equalilibrium

• the system is conserved

Multiple Select

types of friction

• rolling

• static

• gravity

• sliding

Multiple Choice

who is the italian scientist

• aristole

• galileo

• newton

Multiple Choice

who is the scientist who studied in england

• aristole

• galileo

• newton

Multiple Choice

who is the greek scientist

• aristole

• galileo

• newton

Multiple Choice

who is the greek scientist

• aristole

• galileo

• newton

Multiple Choice

who is the greek scientist

• aristole

• galileo

• newton