Physics 1121 Quiz 1 (Part 3)

Question 1

Derived unit

Answer 1

is aunitthat results from a mathematical combination of SI baseunits

Question 2

MKS and SI basic fundamental unit

Answer 2

Meters
1 meter = 39.37”
1 cm = 10mm
1 m = 100cm
1 km = 1000 m

Question 3

CGS basic fundamental unit

Answer 3

cm

1” = 2.54 cm

Question 4

English system basic fundamental unit

Answer 4

Inch

Question 5

Force

Answer 5

Defined as a push or pull on an object that can cause it to deviate from a state of rest or constant velocity.

F = mass x acceleration

Question 6

CGS unit of force

Answer 6

1 dyne = the push or pull that will accelerate a mass of 1 gram at a rate of 1 cm/s2 (g-cm/s2).

Question 7

MKS and SI unit of force

Answer 7

Newton

1 N = the push or pull that can accelerate a mass of 1 kg at a rate of 1 m/s2 (kg-m/s2).
1 N = 100,000 dynes

Question 8

English unit of force

Answer 8

1 pound (lb) = the push or pull that can accelerate a mass of 1 slug at a rate of 32 ft/s2.
1 N = 0.225 lb

Question 9

Pressure

Answer 9

The force acting upon a unit of area or surface or force/area.
Solids: Force/area

Question 10

SI unit of pressure

Answer 10

Pascal

1 Pa = 1 N/m2

Question 11

CGS unit of pressure

Answer 11

The CGS unit of pressure is the dyne/cm2.

Question 12

English unit of pressure

Answer 12

The English unit of pressure is pounds/in2 or psi. Sometimes, lb/ft2 can also be used.
1 psi = 6,890 Pa
Psi = lb/ft2 ÷ 144 in2/ft2

Question 13

Pressure in liquids

Answer 13

Liquids: P = Dliquid x height or depth

Density of water = 62.4 lbs/ft^3

Question 14

Boyles Law

Answer 14

for any gas, the pressure x volume is a constant as long as there is no change in temperature.
P x V = constant

Question 15

Pascals Law

Answer 15

the pressure applied to a confined fluid acts equally in all directions (omnidirectional).

Question 16

The main fundamental forces found in the universe are

Answer 16

1)Electromagnetic
2) Nuclear
A) Strong
B) Weak
3) Gravity