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Valentin [98]
4 years ago
7

How many protons does an uncharged zinc atom have

Physics
1 answer:
diamong [38]4 years ago
8 0
ANY Zinc atom has 30 protons in its nucleus, no matter
what the atom's net charge is. 

If there are more or less than 30 protons in the nucleus,
then it's an atom of some other element, not Zinc.
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A sprinter accelerates from rest to 10.0m/s in 1.35s.
ANEK [815]

Answer:

a) Acceleration = 7.41 m/s^2

b) Distance ran = 6.75 m

Explanation:

For Acceleration use the formula...

a = (v - u) ÷ t....where v=10 and u=0....and t=1.35

a = (10 - 0)÷ 1.35

;acceleration = 7.41m/s^2

For the distance moved in 1.35s

;use the...s = ut + 1/2at^2....where s is the distance moved

;s = (0)(1.35) + 0.5(7.41 × 1.35^2)

Distance moved = 6.75m

3 0
4 years ago
Read 2 more answers
A steam power plant produces 500 MW of electricity with an overall thermal efficiency of 35%. Determine (a) the rate at which he
Margaret [11]

Answer:

Explanation:

500 MW = 500 X 10⁶ J / s

If R be the rate of heat supplied and 35 % is the efficiency of conversion

R x .35 = 500 X 10⁶

R =  500 X 10⁶ / .35

= 1428.57 x 10⁶ J / s

b )

Rate of heat going waste

= .65 x 1428.57 x 10⁶

= 928 .57 x 10⁶ J / s

c )

Heat content of coal = 30 x 10⁶ J /kg

1428.57 x 10⁶ J of heat will come from

= 1428.57 x 10⁶ J  / 30 x 10⁶ J /kg

= 47.62 kg per second

= 47.62 x 24 x 60 x 60 =  4114368 kg in one day

= 4114368 / 907.185 ton per day  

= 4535.31 ton per day

d ) Fuel consumption rate  will decrease by 12.5  % if thermal efficiency is increased to 40 % .  

3 0
3 years ago
Figure 9.27
liraira [26]
Hcchhchchhhchchchcnjnnnnnn
3 0
4 years ago
4. Which of the following are equivalent units for a watt?
abruzzese [7]
Explanation:Watt=NM/s=J/s=kgm²/s³=hP Answer :B,kgm²/s³
6 0
3 years ago
Ganymede is one of the many moons of Jupiter. It is nearly spherical in shape. It is larger than the planet Mercury and slightly
svp [43]
Satellite (moon) revolve around the planet
But planet revolve around the sun.
Ganymede is a satellite(moon) which revolve around the planet jupiter. So, it is considered as moon not planet.
Simple theory.
8 0
3 years ago
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