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alexgriva [62]
3 years ago
7

What is the weight of a 42 kg object if the object was on the moon?

Physics
1 answer:
sveticcg [70]3 years ago
4 0
(1.6 m/s²)(42 Kg)= 80 N
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A hiker is at the bottom of a canyon facing the canyon wall closest to her. She is 790.5 meters from the wall and the sound of h
tester [92]

Answer:

4.80 seconds

Explanation:

The velocity of sound is obtained from;

V= 2d/t

Where;

V= velocity of sound = 329.2 ms-1

d= distance from the wall = 790.5 m

t= time = the unknown

t= 2d/V

t= 2 × 790.5/ 329.2

t= 4.80 seconds

7 0
3 years ago
1- A 30 gram bullet travels at 300 m/s. How much kinetic energy does it have?
labwork [276]

Answer:

1.35 kJ  

Explanation:

KE = ½mv² = ½ × 0.030  kg × (300 m·s⁻¹)² = 1350 J = 1.35 kJ

7 0
3 years ago
Read 2 more answers
How do you work out how many atoms there are in a isotope?
GalinKa [24]
206Pb = 1.342 x10^22 atoms 

<span>To find the number of atoms, you must first find the number of moles. If 238U is 238.029g/mol, and we have 1.75 grams, how many moles is that? 1.75 divided by 238.029 = 0.007352045 moles. To find the number of atoms in 0.007352045 moles, you multiply by a mole: </span>
<span>0.007352045 x 6.02 x 10^23 = 4.426 x10^21 atoms. </span>

<span>Same procedure for 206Pb: </span>
<span>4.59 divided by 205.97446 = 0.022284316 moles </span>
<span>0.022284316 x 6.02 x 10^23 = 1.342 x10^22 atoms. </span>

<span>Hope that helps you!
https://answers.yahoo.com/question/index?qid=20100331153014AAoMXcu
</span>
4 0
3 years ago
WHICH ONE!!! ASAP FOR A RETAKE FOR SCIENCE PLS
aleksandr82 [10.1K]
I’m 95% sure it’s covalent bonds.
8 0
2 years ago
A new ride being built at an amusement park includes a vertical drop of 71.6 meters. Starting from rest, the ride vertically dro
Allisa [31]

Answer: 2.6x107

Explanation:

3 0
3 years ago
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