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Naddik [55]
3 years ago
14

Which block do you think will slide down the ramp most quickly?

Chemistry
2 answers:
Oksi-84 [34.3K]3 years ago
8 0
Steel block because if you think about the friction it would make it more fast and therefore it would go faster
tangare [24]3 years ago
5 0
Steel because of friction. When rubber moves over smooth surfaces, it's the molecular forces between the two that are the main cause of friction. But when the surface is rough, it's the deformation of entire molecular layers of rubber that's the chief cause of friction.
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A balloon contains 5L of oxygen at a pressure of 90 kPa. How much oxygen will the ballon contain if the pressure is lowered to 6
VLD [36.1K]
We have that all (ideal) gases obey the fundamental gas equation: PV=nRT where P is the Pressure, V is the Volume, n is the number of moles, R is a universal constant and T is the temperature in Kelvin. In this process, we have that both the number of moles and the temperature stays the same. So if we denote by i the initial conditions and by f the final conditions of the gas, we have:P_{i} * V_{i}=nRT= P{f}*V{f} . Hence, if we solve for the final Volume we get: V_{f} = \frac {V_{i}*P_{i} }{P_{f}} . Now we know all the other variables; substituting we get that the final volume is 6.7 L (6.716 L ).
3 0
3 years ago
Read 2 more answers
A reaction is followed and found to have a rate constant of 3.36 × 104 m-1s-1 at 344 k and a rate constant of 7.69 m-1s-1 at 219
g100num [7]

The relation between rate constants at different temperatures, temperature and activation energy is known as Arrhenius equation

<u>Arrhenius equation</u>

K=Ae^-{\frac{Ea}{RT} }

For two temperatures

Ea=R(\frac{ln\frac{k1}{k1} }{(\frac{1}{T1})-(\frac{1}{T2})})

Where

Ea = ? = activation energy

k1 = 3.36 × 10⁴

T1=344 k

k2=7.69

T2=219K

R= gas constant = 8.314 J /molK

Putting values

Ea= (8.314)(\frac{ln(\frac{7.69}{33600})}{(\frac{1}{344})(\frac{1}{219})}

Ea = (-69.69)/(-0.00166) = 41981.93 J/mol

Or

Activation energy is 42.0 kJ /mol

3 0
3 years ago
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777dan777 [17]
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2 years ago
Why is a gold ring not made from 100% golf
Llana [10]
<span>Gold is actually very soft. If rings were made of pure gold they would bend and become disfigured. Other elements are added to give the ring its stability.</span>
4 0
3 years ago
What is the wavelength of a photon having a frequency of 1.65x10^15 Hz? (c = 3.00 × 108 m/s, h = 6.63 × 10–34 J · s)
olga_2 [115]

Answer

here.

Explanation:

https://www.chegg.com/homework-help/questions-and-answers/habib-chami-attempt-1-question-12-3-points-wavelength-photon-frequency-165-x-10-15-hz-c-30-q48412138

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2 years ago
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