1. Why is it important to accurately predict the possible formation and path of a hurricane?

2 answers:

7 0

1) Prediction of a hurricane's path/formation can save lives, since we can predict the strength, then warn the people who are in danger of it's reach.

4) The more wind a hurricane has, usually the faster it tears apart, since the strong winds acts to constrict the center, limiting and sometimes altogether stopping the hurricane.

5) I'd say yes, since the humidity is really high, so the wind can whip that up into the heat, then the hot air descends to create a vortex.

Bezzdna [24]3 years ago

7 0

1) Prediction of a hurricane's path/formation can save lives, since we can predict the strength, then warn the people who are in danger of it's reach.

4) The more wind a hurricane has, usually the faster it tears apart, since the strong winds acts to constrict the center, limiting and sometimes altogether stopping the hurricane.

5) I'd say yes, since the humidity is really high, so the wind can whip that up into the heat, then the hot air descends to create a vortex.

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A sample of helium gas has a volume of 2.75 L at STP. How many grams of He are present?

il63 [147K]

Molar mass He = 4.0 g/mol

1 mole --------- 22.4 L ( at STP )
? mole ---------- 2.75 L

2.75 x 1 / 22.4 => 0.1227 moles

1 mole He ------------ 4.0 g
0.1227 moles --------- ?

0.1227 x 4.0 / 1 => 0.4908 g of He

hope this helps!

4 0

3 years ago

15.3 g of nano3 were dissolved in 100g of water in a calorimeter. The temperature of the water drops from 25.00°c to 21.56°c. Ca

Arturiano [62]

Answer:

0.259 kJ/mol ≅ 0.26 kJ/mol.

Explanation:

To solve this problem, we can use the relation:

Q = m.c.ΔT,

where, Q is the amount of heat absorbed by ice (Q = ??? J).

m is the mass of the ice (m = 100.0 g).

c is the specific heat of water (c of ice = 4.186 J/g.°C).

ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 21.56°C - 25.0°C = -3.44°C).

∵ Q = m.c.ΔT

∴ Q = (100.0 g)(4.186 J/g.°C)(-3.44°C) = -1440 J = -1.44 kJ.

∵ ΔH = Q/n

n = mass/molar mass = (100.0 g)/(18.0 g/mol) = 5.556 mol.

∴ ΔH = (-1.44 kJ)/(5.556 mol) = 0.259 kJ/mol ≅ 0.26 kJ/mol.

3 0

4 years ago

State the number of solutions for Matrix B. a. No Solution b. One Solution c. Infinitely Many Solutions

NISA [10]

Answer:

C. Infinitely Many Solutions

Explanation:

No solution case : This is the case when all given variables are not equal to any constant, for example: there is one row of zeros in matrix e.g 0=3. matrix B don't have any zero row. So, Not True.

One Solution case: This is the case when all variables are independent variables like if they are equal to some constant. e.g x=1,y=2,z=4 , Matrix B have more than one variable in first row due to which it made equation look like x+y=-5. so matrix B can't have only one solution. So, Not True.

Infinitely Many Solutions case: when there is one or more variables which is not equal to any constant and acting as linearly dependent variable, then that matrix have infinite solutions. Matrix B have that variable which is linearly dependent as show in the attachment solution. So, True.