Physics

Question 0

newton’s interest in mechanics was rekindled with the advent of a spectacular ______ in 1680

Answer 0

comet

Question 1

isaac newton determined that gravity was what

Answer 1

universal

Question 2

everything pulls on everything else in a beautifully simple way that involves only what and what

Answer 2

mass and distance

Question 3

the universal gravitational constant can be expressed by what equation

Answer 3

F=G(m1m2)/d^2

Question 4

the magnitude of G is the same as the gravitational force between two 1-kilogram masses that are 1 meter apart which is what numerical value in Newton’s?

Answer 4

6.67 x 10^-11

.0000000000667

Question 5

calculating G alone was first done by the English physicist, ___________________ in 1798

Answer 5

henry cavendish

Question 6

phillip von jolly attached a spherical flask of what element to a balance to also demonstrate gravitational force between 2 of objects

Answer 6

mercury

Question 7

the phenomena wherein the effect of gravity from a localized source spreads uniformly throughout the surrounding space

Answer 7

inverse-square law

Question 8

what is the weakest of all forces

Answer 8

gravity

Question 9

the force of gravity can produce what

Answer 9

acceleration

Question 10

the pressing against earth is the sensation we interpret as what

Answer 10

weight

Question 11

ocean tides are caused by the ____________ in the gravitational pull between the moon and the earth on opposite sides of the earth

Answer 11

differences

Question 12

what tides occur at the times of a new or full moon

Answer 12

spring

Question 13

what tides occur when the moon is midway between new and full

Answer 13

neap

Question 14

higher than average tides and lower than average low tides occur because the _____, _______, and ________ are aligned

Answer 14

sun, moon, earth

Question 15

the suns pull is how many times that of the moon

Answer 15

2

Question 16

the greatest tidal range can be found located in

Answer 16

bay of fundy

Question 17

earthquakes and volcanic eruptions have a higher probability of occurring when earth is experiencing a ______ tide

Answer 17

spring

Question 18

tidal effects in the __________ produce electric currents that alter the ________ field that surrounds earth

Answer 18

ionosphere, magnetic

Question 19

the __________ penetration is evident in subtle changes in the behaviors of living things

Answer 19

cosmic-ray

Question 20

the _______________________________ intensity inside a planet of uniform density is directional proportional to the radial distance from its center and is maximum at its surface

Answer 20

gravitational field

Question 21

a concentration of mass resulting from gravitational collapse, near which gravity is so intense that not even light can escape is termed what

Answer 21

black hole

Question 22

interplanetary forces causing planets to wobble in their orbits is termed what

Answer 22

perturbations

Question 23

tracking the orbits of both uranus and neptune led to the discovery of which planet in 1930 where in arizona

Answer 23

pluto, lowell observatory

Question 24

what planet was discovered at what observatory on linden street by johann galle

Answer 24

neptune, berlin

Question 25

why is a black hole invisible

Answer 25

no light can escape

Question 26

an astronaut lands on a planet that has the same mass as earth but twice the diameter. how does her weight differ from that on earth

Answer 26

corresponds 1/4

Question 27

when will the gravitational force between you and the sun be greater, today at noon or tomorrow at midnight? why

Answer 27

noon- closer to the sun

Question 28

the value of G at earth’s surface is about 9.8m/s^2. what is the value of G at a distance to twice earth’s radius

Answer 28

2.45m/s^2