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ad-work [718]
2 years ago
8

A copper atom has an atomic number of 29 and an atomic mass of 64. What

Physics
1 answer:
Elina [12.6K]2 years ago
3 0

Explanation:

Answer is B.

B. It has a central nucleus composed of 29 protons and 35 neutrons,surrounded by an electron cloud containing 29 electrons.

I hope it's helpful!

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The proper IUPAC naming convention for the compound symbol 'KI' is
Darya [45]
Proablyly a or c idk 
6 0
2 years ago
A wire is stretched between two posts. Another wire is stretched between two posts that are twice as far apart. The tension in t
Margarita [4]

Answer: 996m/s

Explanation:

Formula for calculating velocity of wave in a stretched string is

V = √T/M where;

V is the velocity of wave

T is tension

M is the mass per unit length of the wire(m/L)

Since the second wire is twice as far apart as the first, it will be L2 = 2L1

Let V1 and V2 be the speed of the shorter and longer wire respectively

V1 = √T/M1... 1

V2 = √T/M2... 2

Since V1 = 249m/s, M1 = m/L1 M2 = m/L2 = m/2L1

The equations will now become

249 = √T/(m/L1) ... 3

V2 = √T/(m/2L1)... 4

From 3,

249² = TL1/m...5

From 4,

V2²= 2TL1/m... 6

Dividing equation 5 by 6 we have;

249²/V2² = TL1/m×m/2TL1

{249/V2}² = 1/2

249/V2 = (1/2)²

249/V2 = 1/4

V2 = 249×4

V2 = 996m/s

Therefore the speed of the wave on the longer wire is 996m/s

3 0
3 years ago
PLEASE HURRYY!!!!The diagram shows two balls released from a device at the same time. The ball on the left falls freely from res
LenaWriter [7]

Answer:

i'm pretty sure its B but i may be wrong if you dont wanna take the chance wait for someone

Explanation:

4 0
2 years ago
Read 2 more answers
What does Neil Degrasse Tyson mean when he says "Wolves domesticated humans" 15000 years ago?
Aliun [14]

Answer:

Explanation:

fufuu6u

8 0
2 years ago
A 100-kg astronaut floating in space holds a 10-kg object. Then the object is tossed at 50 m/s. How fast does the astronaut go a
zlopas [31]

Answer:

velocity is 5 m/s

Explanation:

mass of astronaut (M)=100kg

mass of object (m)=10kg

Initially they are rest , so initial velocity (u)= 0 m/s

Final velocity of object ; v_1=10m/s

let final velocity of astronaut = v_2 (Unknown)

Now , By conservation of linear momentum

Initial momentum = Final momentum

(m + M)\times u = (m\times v_1) + (M\times v_2)

Now insert values

0 = (10 kg \times 50 m/s ) + (100 kg \: v_2)

Further simplifying

v_2=-\frac{500 kg-m/s}{100kg}

So,

v_2= -5\:m/s

So, velocity is 5 m/s (the negative sign is due to direction)

4 0
3 years ago
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