Physical Science- Test 1- Johnston

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

There are 10 mm in ______

1 cm

In buying a product, a shopper has a choice of the following amounts, all the same price. Which is the best buy? 432 cc, 1 pint, 1 half-liter, 450 mL

1 half-liter

What is the relationship between a yard and a meter?

1 yd=.914 m

A very tentative explanation of observations of some regularity of nature is a...

Hypothesis

Which is NOT a standard metric unit? kilogram, meter, second, gram

Gram

What are the seven base units of SI?

meter, length kilogram, mass second, time ampere, electric current kelvin, temperature mole, amount of substance candela, luminous intensity

What is a derived unit?

multiples or combinations of units area, volume, speed

Kilo

k thousand: 10^3

Which of the following is NOT a derived quantity? Volume, speed, mass, density

Mass

Displacement divided by time gives

average velocity

Giga

billion: 10^9 G

Centi

c one-hundreth: 10^-2

The metric prefix that means one-hundreth (1/100) is

centi-

Motion necessarily involves

change in position

Deci

d one-tenth: 10^-1

Deka

da ten: 10^1

Why do we need standard units?

enable us to describe things in a concrete way describe fundamental quantities "a fixed reproducible value for the purpose of taking accurate measurements

Hecto

h hundred: 10^2

Milli

m one-thousandth: 10^-3

Density describes

mass per unit volume

What is the difference between weight and mass?

mass- the amount of matter an object contains, kilogram, fundamental quantity (does not change) weight- derived quantity, gravitational attraction on an object by a celestial body, this attraction varies based on its mass.

Nano

n one-billionth: 10^-9

The steps to an experiment include:

redefine the problem materials procedure observations/record what happens draw conclusions and make recommendations

How do you determine density?

D= mass/volume

A cubic centimeter of pure water at maximum density has a mass of

1g

What is the mass of 25 cm^3 of pure water?

25 g

What is the best angle for projectile?

45 degrees

An object with a mass of 5 kg is dropped and takes 9 s to hit the ground. Then another object with a mass of 10 kg is dropped from the same point. How long does it take to hit the ground?

9 seconds

What is air resistance?

9.8 m/s/s

A speedometer indicates _______ if the automobile is traveling forward.

Instantaneous Velocity ** velocity includes direction

Mega

M million: 10^6

What has a larger volume, a liter of water or a liter of mercury?

Neither, they have the same volume

What must be give to determine a location?

a reference point and a measurement scale

What is a hydrometer used for?

a weighted glass bulb that floats in liquids to measure density the denser the liquid the higher it floats

What is speed?

scalar quanitity, with only magnitude

Distance covered per unit of time is called

speed

What is terminal velocity?

still falling but not accelerating

The standard unit of time, the second is now defined with reference to...

the cesium-133 atom

An object transported from Earth's surface to the surface of the Moon has

the same mass, but different weight

For the multiplication of 7.443 m times 8.00 m, the results should be reported with how many significant figures?

three

Micro

u one-millionth: 10^-6

Will an object come to a stand still in the air?

yes

Will an object that accelerates up fall at the same rate?

yes


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