Question

*WILL MEDAL AND FAN*

The speed of light is 3 × 10^8 meters per second. What is this speed in standard form?

A.3,000,000,000 meters per second
B.300,000,000 meters per second
C.30,000,000 meters per second
D.300,000 meters per second

Answer 1

3 x 10^8

Answer 2

B.300,000,000 meters per second

Answer 3

that's the point, baby :)

Answer 4

Thank you! can you help me with couple more

Answer 5

of course, go ahead

Answer 6

day is equivalent to 8.64 × 10^4 seconds. What is this time in standard form?

Answer 7

8.64 x 10^4

Answer 8

86,400 seconds

Answer 9

Ahh Thank you :)

Answer 10

you are welcome.., :)

Answer 11

im sorry if im bothering you. if you dont want me to show you the rest let me know

Answer 12

No problem. I'd love to help you, trust me

Answer 13

You are not bothering me .., ;)

Answer 14

Which of the following best represents the speed of Halley's comet when it is nearest to Earth?

Answer 15

ok, hold on

Answer 16

1 × 10-5 kilometers per year
1 × 105 kilometers per year
1 × 105 kilometers per hour
1 × 10-5 kilometers per hour

Answer 17

all of them are exponets and also all of them are times

Answer 18

I think the answer is 1 × 10^5 kilometers per hour

Answer 19

1 x 10^5 kilometers per hour

Answer 20

Right!

Answer 21

The length of an object is measured as 45.7 centimeters. What is this measurement in scientific notation?

Answer 22

yeay! :)

Answer 23

4.57 × 101 centimeters
0.457 × 102 centimeters
457 × 101 centimeters
4,570 × 102 centimeters

Answer 24

Also same there all exponets and all of them are times

Answer 25

4.57 x 10^1 centimeters

Answer 26

of course!

Answer 27

3 more :)

Answer 28

the answer is A

Answer 29

The equatorial radius of Earth is approximately 6 × 103 km, while the equatorial radius of Saturn is approximately 6 × 104 km. Which of the following is true?
The equatorial radius of Earth is approximately one hundred times that of Saturn.

The equatorial radius of Saturn is approximately one hundred times that of Earth.

The equatorial radius of Saturn is approximately ten times that of Earth.

The equatorial radius of Earth is approximately ten times that of Saturn.

Answer 30

ok , please

Answer 31

6 x 10^3 km and 6 x 10^4 km

Answer 32

The equatorial radius of Saturn is approximately ten times that of Earth.

Answer 33

C right?

Answer 34

yes!

Answer 35

what else ??

Answer 36

The mass of an electron is approximately 9 × 10-28 grams, while the mass of a neutron is approximately 2 × 10-24 grams. Which of the following is true?

Answer 37

9 x 10^-28 and 2 x 10^-24 grams

Answer 38

The mass of a neutron is approximately 2,000 times the mass of an electron.

The mass of a neutron is approximately 20,000 times the mass of an electron.

The mass of a neutron is approximately 10,000 times the mass of an electron.

The mass of a neutron is approximately 1,000 times the mass of an electron.

Answer 39

the mass of a electron = Me = 9 x 10^-28 grams
the mass of a neutron = Mn = 2 x 10^-24 grams

So

\[\frac{ Mn }{ Me } = \frac{ 2 \times 10^{-24} }{ 9 \times 10^{-28}} = \frac{ 2 \times 10^{-24+28} }{ 9 } = \frac{ 2 \times 10^{4} }{ 9 } \]
\[Mn = \frac{ 2 }{ 9 } \times 10^{4} \]

Answer 40

i mean
\[Mn = \frac{ 2 }{ 9 } \times 10^{4} Me\]

Answer 41

So, The mass of a neutron is approximately 10,000 times the mass of an electron.

Answer 42

Ok got it but just one question whats the answer? im kinda confused

Answer 43

the answer is The mass of a neutron is approximately 10,000 times the mass of an electron.

Answer 44

the reason why the mass of a neutron is approximately 10,000 times the mass of an electron because the mass of a neutron is (2/9) x 10^4 mass of an electron, like what i've calculated above

Answer 45

are you still confused for the last??

Answer 46

@Kyliejones :)