General Science Module 4

Question 1

Blaise Pascal

Answer 1

forerunner of the computer

Question 2

ENIACH

Answer 2

first electronic computer

Question 3

Wilhelm Conrad Roentgen

Answer 3

discovered X-rays

Question 4

simple machine

Answer 4

a device that either multiplies or redirects a force

Question 5

force

Answer 5

a push or pull exerted on an object in an effort to change that object’s velocity

Question 6

six basic kinds of simple machines

Answer 6

lever, wheel and axel, pulley, inclined plane, wedge, and screw

Question 7

mechanical advantage

Answer 7

the amount by which force or motion is magnified in a simple machine

Question 8

diameter

Answer 8

the length of a straight line that travels from one side of a circle to another and passes thougth the center of the circle.

Question 9

circumference

Answer 9

the distance around the circle, equal to 3.1416 times the circle’s diameter

Question 10

Tecnology

Answer 10

reults from accident, science, or applied acience.

Question 11

Example of first class lever

Answer 11

pliers and see saw

Question 12

Example of second class lever

Answer 12

wheelbrarrow

Question 13

applied science experiements

Answer 13

an experiment to findbetter gasoline mixture for automobiles

Question 14

example of technoolgy

Answer 14

a gun hunting bears

Question 15

A block and tackle uses 2 pulleys. What tis the mechanical advantage?

Answer 15

Mechanical advantage is equal to 2

Question 16

If you cann’t generate enough force to lift a rock with a first class lever the way you have to set it up, should you change the setup so that the fulcrum is closer or farther from the rock?

Answer 16

fulcrum should be moved closer to the rock

Question 17

If a third class lever has a mechanical advantage of 5. What does that mean?

Answer 17

The speed at whick the resistance movees will be magnified by 5.

Question 18

How is applied science different from science?

Answer 18

motive

Question 19

What gives rise to technology?

Answer 19

accident, science, or applied science

Question 20

What is the mechanical advantage of a first class lever in which the fulcrum is 20 inches from the resistance and 80 inches from the effort?

Answer 20

mechanical advantage=80/20=40

Question 21

Example of third class lever

Answer 21

shovel

Question 22

lever

Answer 22

consist of bar and fulcrum

Question 23

wheel and axle

Answer 23

consist of a wheel that connects to a cylinder

Question 24

pulley

Answer 24

consist of a wheel over which a rope or chain moves

Question 25

inclined plane

Answer 25

is simply a ramp

Question 26

screw

Answer 26

is composed of an inclined plne wrapped around the cyclinder of a wheel and axle.

Question 27

What is the mechanical advatage of a lever in whch the effort is 10 inches from the fulcrum and the resistance is 2 inches from the fulcrum?

Answer 27

Mechanical advantage =10 inches/ 2 inches

Question 28

Two singel wedges each have a slope that is 6 inches long and and a height of 1 inch. What is the mechanical advantage?

Answer 28

Mechanical advatage= 6 inches/ 1 inch=6 inches

Question 29

You push a box up an inclined plane so you don’t have to lift it straight up in the air. If the inclined plane’s slope has a lenght of 10 feet and a height of 2 feet, What is the mechanical advantage?

Answer 29

Mechanical advatage=10 feet/ 2 feet = 5 feet