Which astronomer was the first to put the sun at the center of the universe?
Copernicus
100
The SI units for work are...
Joules
100
The earth receives energy from the sun through a process called...
Radiation
100
In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of what?
Orbital Electrons
100
The human eye is most similar to:
A. A movie screen
B. A camera
C. Microscope
D. Telescope
B. A camera
200
Which part of the sun is the source of light that reaches the earth?
Photosphere
200
If you push an object twice as far while applying the same force, you do:
A. Twice as much work
B. Four times as much work
C. The same amount of work
D. Half as much work
A. Twice as much work
200
As a system becomes more disordered, entropy....
A. Increases
B. Decreases
C. Remains the same
D. Goes to zero
A. Increases
200
In the periodic table, elements in the same _____ have very similar properties.
Column
200
What was once thought to fill every corner of space?
A. Planets
B. Light
C. Ether
D. Waves
C. Ether
300
Which part of the sun is the outermost layer?
Corona
300
The atomic number of an element is the same as the number of its .....
Protons
300
Color depends on what characteristic of light?
Its frequency
400
Approximately how old is the universe?
15 billion years old
400
A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of ....?
5000 Joules
400
Room temperature on the Kelvin is about...
A. 100K
B. 200K
C. 300K
D. 400K
E. More than 400K
C. 300K
400
What type of radiation is most dangerous to humans?
Gamma
400
When an object is farther from a concave mirror than the mirror's focal length, the image is....
Real & Inverted
500
Disregarding air resistance, objects will fall with a constant....
acceleration
500
Which has a greater kinetic energy, a car traveling at 20 km/hr or a car half the mass traveling at 40 km/hr?
The 40 km/ hr car
500
The input current of a transformer is 4 A. The primary coil has 50 loops and the secondary has 25 loops. What is the current that the transformer puts out?
8 A
500
The Bohr model of the atom is akin to:
A. A miniature solar system
B. Plum pudding where raisins represent atomic nuclei
C. Central heavy ball with lighter balls connected by springs
D. None of these