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Evgen [1.6K]
3 years ago
14

When devising a model, scientists can only use the information available during their lifetime. This means that the current mode

l of the atom may be changed when new experiments are performed in the future. Does this mean that the currently accepted model of the atom is useless? Explain your answer.
Physics
2 answers:
11111nata11111 [884]3 years ago
6 0

no, it not useless. we still learn Bohr's model in HS n dats almost 200 yr old! while there may be new models, previous one is good for explaining the basics. it is also useful to learn previous model n see how our understanding improves over time.


Rom4ik [11]3 years ago
6 0

The currently accepted model, when replaced by a new one, has served the purpose being the best model we have at this time. So it is far from useless. It provides a basis for the new model. Combined with all previous replaced models, they show the history and process of our understanding of the atom.


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What electromagnetic wave can permanently damage skin?
Leya [2.2K]
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3 0
3 years ago
What is the net force in this picture?
jek_recluse [69]

Answer:

I'M SORRY I CAN'T SEE THE PICTURE BUT IT WILL MOST LIKELY BE THE DIFFERENCE BETWEEN THE NUMBERS

Explanation:

for instance if there was someone pushing a desk with a net force of 9 towards the right, the net force would come to a total of 9 since there is no one on the other side pushing the desk. Meaning the desk would go right. I'm sorry if this isn't what you needed D:

6 0
4 years ago
A computer cooled by a fan contains eight PCBs, each dissipating 10W power. The height of the PCBs is 12 cm and the length is 18
Fantom [35]

Answer:

a) The flow rate of the air is 0.0104 kg/s

b) The fraction of the temperature is 23.91%

Explanation:

a) Given:

N = Number of PCBs = 8

Q = heat dissipated = 10 W

W = power supplied = -25 W

ΔT = rise temperature = 10°C

The total amount of heat dissipated is equal to:

Q_{T} =N*Q=8*10=80W

The expression of conservation of energy is:

E_{in} =E_{out} \\Q_{T} +m_{in} h_{in} =m_{out} h_{out} +W\\m_{in}=m_{out} m_{air},(mass-balance)\\Q_{T}=m_{air}(h_{out} -h_{in})+W\\h=CpT\\Q_{T}=m_{air}Cp(T_{out} -T_{in})+W

Replacing:

80=m_{air} *1.005x10^{3} *10+(-25)\\m_{air} =0.0104kg/s

b) The amount of heat is equal:

Q_{fan} =m_{air} Cp*delta-T\\25=0.0104*1.005x10^{3} *delta-T\\delta-T=2.391C

The fraction of the temperature is:

f=\frac{2.391}{10} *100=23.91%

8 0
4 years ago
The long-term effect of temperature on the polar ice is not fully understood by science. True False
Reika [66]
I suggest the answer is True!!!! 
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3 years ago
Read 2 more answers
A man with a mass of 60 kg rides a bike with a mass of 13 kg. What is the force needed to accelerate the bike at 0.90 m/s2?
Scrat [10]
The total mass of the things on the road is 60 + 13, which is 73kg.

mass • acceleration = F

73 x 0.9m/s^2 = 65.7N

F = 65.7 N

7 0
2 years ago
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