Garcia

The random variable x is the number of houses sold by a realtor in a single month at the Sendsom's Real Estate office. Its probability distribution is as follows. Find the expected number of houses sold in a month. Houses Sold (x) Probability P(x) 0 0.24...

16 years ago

When a spacecraft travels from Earth to the Moon, the gravitational force from Earth initially opposes this journey. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from Earth mus...

13 years ago

Consider the swimmer in the figure below. Suppose that his swimming speed relative to the water is 5.7 m/s, current = 2.2 m/s, and that the river is 10 m wide. How long will it take for him to cross the river?

13 years ago

Suppose that the swimmer in the figure below has a swimming speed relative to the water of 0.44 m/s, while the speed of the current is 2.0 m/s. If it takes the swimmer 180 s to cross the river, how wide is the river?

13 years ago

An airplane flies from Boston to San Francisco (a distance of 5000 km) in the morning, then immediately returns to Boston. The speed of the plane relative to the air is 240 m/s. The wind is blowing at 41 m/s from west to east, so it is "in the face" of th...

13 years ago

What is the speed of a satellite in a geosynchronous orbit about Earth?

13 years ago

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 3.60 MJ of energy (in the form of heat) if the temperature of the sodium is not to increased by more than 10.0 °C? Use CP = 30.8 J/(K·mo...

13 years ago

Container A holds 752 mL of ideal gas at 2.40 atm. Container B holds 179 mL of ideal gas at 4.80 atm. If the gases are allowed to mix together, what is the resulting pressure? Note: Find the partial pressure of each gas in the total volume using a formula...

13 years ago

The organic compound di-n-butyl phthalate, C16H22O4(l), is sometimes used as a low-density (1.046 g·mL–1) manometer fluid. Compute the pressure (in torr) of a gas that supports a 555-mm column of di-n-butyl phthalate. The density of mercury is 13.53 g·mL–...

13 years ago

A 7.30-L container holds a mixture of two gases at 45 °C. The partial pressures of gas A and gas B, respectively, are 0.342 atm and 0.527 atm. If 0.250 mol a third gas is added with no change in volume or temperature, what will the total pressure become?

12 years ago

Dry air (0% humidity) is approximately 78% N2, 21% O2, and 1% Ar by moles. Calculate the molar mass and density of dry air at 0 °C and 1.0 atm. Assume ideal behavior and use two significant figures in your answers.

12 years ago

Enrico Fermi was a famous physicist who liked to pose what are now known as Fermi problems in which several assumptions are made in order to make a seemingly impossible estimate. One example of a Fermi problem is "Caesar's last breath" which estimates tha...

12 years ago

For each electron in a ground-state Be atom, select the set of quantum numbers that represents it. Check all that apply. ( ) n=2, l=0, ml=0, ms=+1/2 ( ) n=1, l=0, ml=0, ms=+1/2 ( ) n=2, l=1, ml=0, ms=-1/2 ( ) n=2, l=1, ml=1, ms=+1/2 ( ) n=2, l=0, ml=0, ms...

12 years ago

Which of the following electron configurations of neutral atoms represent excited states? ( ) [Xe]6s24f1 ( ) 2s2 ( ) 1s22s22p63s23p63d2 ( ) [Ar]4s23d3 ( ) [Kr]5s14d5

12 years ago

Consider an ionic compound, MX2, composed of generic metal M and generic halogen X. The enthalphy of formation of MX2= -891. The enthalphy of sublimation of M= 141. The first and second ionization energies of M are 605 and 1392. The electron affinity of X...

12 years ago

i am a number between 30 and 40 When you put me into 8 equal groups there is an even number in each group and 1 is left over what number am i

9 years ago

bobpursley on the first one it's a mult. choice which I have A) $0.00 B) -$1.00 C) -$0.85 D) -$0.83 where did you get $17 though? I don't understand this one.

16 years ago

Can some one please help me with this one...

16 years ago

Can some one give me some hints please..

16 years ago

D) 13 : 191

16 years ago

I have gotten the answer already I have worked out the problem and I came up with 3.60 I mult. across. then added the answers all together..

16 years ago

Well you see that answer does not match with one of the multiple choice rather it's and we know that it's not D so I'm assuming it's A then. A) 204 : 13 B) 191 : 13 C) 13 : 204 D) 13 : 191

16 years ago

Psychodynamic Therapies Humanistic-Existential Therapy Behavior Therapy Cognitive Therapies Group, Couples, and Family Therapy

15 years ago

Ok thanks, i was in betwwen congnitive and humanistic.

15 years ago

A military gun is mounted on a railroad car (m = 1400 kg) as shown in the figure below There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 31 kg with a velocity of 285 m/s...

13 years ago

I am having trouble trying to figure out what formula I can use to determine the partial pressure of each. Is it Boyle's Law?

13 years ago

Thanks. :)

13 years ago

So would it look like this: 2.40*752=P2*931 for gas 1 4.80*179=P2*931 for gas 2 Then add the two P2's that I get. Right?

13 years ago

Makes sense now. Thank you.

13 years ago

I keep getting the answer to the volume of the atmosphere wrong. Are my calculations correct? Or what is my problem? I calculate that the total volume of Earth + thickness of atmosphere is: (4/3)*pi*(6450000 m)^3 = 1.124*10^21 I then calculate that the vo...

12 years ago

I calculated the molar mass to be approximately 29 g/mol. Although I am not entirely sure whether that is the correct answer or not.

12 years ago

It is not one question. It is a series of questions. First calculate the total volume of the atmosphere. Second calculate the total number of gas molecules in the atmosphere. Third calculate the number of gas molecules in Caesar's last breat. Fourth calcu...

12 years ago

Thanks.

12 years ago

I have counted the electrons for all of the five electron configurations. I have determined that as you mentioned [Xe]6s2 4f1 is the excited state of Lu. I also managed to find that the configuration 1s2 2s2 2p6 3s2 3p6 3d2 is the excited configuration of...

12 years ago

Basically what I have found is: 1) excited Lu 2) He 3) excited Ca 4) V 5) Mo

12 years ago

I am having difficulty determining what would be the wavelength that I use to determine the velocity using de Broglie's equation.

12 years ago

But what is the wavelenght? Do I use 5.40 nm?

12 years ago

Where would I add that in to my calculation? Like would it look like this: -Lattice energy of MX2=-891-(141+88.5+605+1392-678)

12 years ago