Physics Midterm Exam

What is the science that examines the fundamental laws relating matter and energy?

Physics

The what of an object is the quantity of matter it contains?

Mass

The what of a measuring device is limited by the finest division on its scale?

Precision

What is the extent to which a measured value agrees with the accepted value for a

quantity?

Accuracy

In performing an experiment, the values of the ______ variable are carefully changed

and the corresponding values of the _____ variables are then measured.

independent, dependent

In graphing, the values for the _______ variable usually are plotted on the horizontal

(x) axis.

independent

An object is what when an unbalanced force acts on it?

accelerated

125 g is how many kg?

0.125 kg

4.9 cm is how many mm?

49 mm

12.3 km is how many cm?

1230000 cm

0.78 cm/s is how many m/s?

0.0078 m/s

What is 540.98 in scientific notation?

5.4098 x 10²

What is 300000000 in scientific notation?

3 x 10^8

What is 0.02300 in scientific notation?

2.300 x 10^-2

What is 0.0054 in scientific notation?

5.4 x 10^-2

(1.2 x 10 ^3) x (3.4 x 10 ^-5)

0.408

(4.5 x 10 ^-1) / (7.4 x 10 ^-7)

608000

How many significant digits is in 300 km.

1

How many significant digits is in 0.035 s.

2

How many significant digits is in 45.002 g

5

How many significant digits is in 0.000670 m/s.

3

Manipulate the equation and solve for a: vf

2

= vi

2

+ 2ad

a = (vf

2– vi 2 ) / 2d