Q6) Ahmad has two unlabeled balloons, one filled with hydrogen gas and the second filled with neon gas.
Densities
How dense is that gas?
Density at
Gas
0°C and
1 atm (g/L)
Argon, Ar
1.784
Carbon dioxide, CO, 1.977
Helium, He
0.1786
Nitrogen, N
1.251
Oxygen, o,
1.429
Hydrogen
0.08988
Neon-
0.900 TL
I
TO
He places both balloons in a chamber of Helium to help him identify
neon and hydrogen.
a.
Predict what will happen to help Ahmed identify the element
in each of the balloons when it is placed in Helium. Explain your
answer. Give your evidence

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Um vetor representa um deslocamento cujo módulo é 20 m. se v faz um ângulo de 60 graus com a horizontal, qual é o valor das componentes horizontal e vertical deste vetor?

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