az_lender

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Planetary research scientist. NASA grantee. Taught physics and mechanical engineering. Very old!

發問 0 回答 259

2017-11-27 8:28 am

Chemistry Density Question (Any help appreciated, thanks!)?

2017-11-21 10:59 am

When 5.00 g of solid barium react with chlorine gas to produce solid barium chloride, 31.1 kJ of heat is released.?

2017-11-10 12:04 pm

2CO+O2->2CO2Howmany liters ofcarbon dioxide areproduced if250L of carbon monoxide areburned inoxygen?How many liters of oxygen arenecessary?

2017-10-18 7:11 am

Solve sinh(x) = 1 for x?

2017-10-17 5:48 pm

Making X the Subject question on photo.?

2017-10-09 3:02 pm

How many molecules are present in 9.19 × 10–4 g H2?

2017-09-26 10:22 pm

Forces Problem?

2017-09-25 9:04 pm

A platinum ring is composed of 2.65 × 1023 atoms. Calculate the mass of the ring in grams.?

2017-09-25 1:26 am

How many grams or moles of pure HCl are needed to completely react with 0.581 grams of Na2CO3?

2017-09-15 9:18 am

Why is hydrogen reactive and helium is unreactive?

2017-09-12 7:03 pm

4^x-(2*25^x)-10^x <0 solve the inequality?

2017-09-12 7:02 pm

Calculate the amount of heat required to raise the temperature of a 48g sample of water from 53°C to 88°C.?

2017-09-11 10:26 am

Alkanes cannot have cis/trans isomerism because:?

2017-09-11 12:14 am

2017-09-10 3:46 pm

Best you, care able, patience answer please how to ask circuit diagram with question + remindable hinds?

2017-08-28 3:08 pm

Rounding 7.445?

2017-08-28 3:38 pm

What is the correct answer choice ? And what do I need to understand in order to solve this problem ?

2017-08-20 4:08 am

Question involving scientific notation and negative integers?

2017-08-15 11:38 pm

Which statements are true based on the diagram? Check all that apply.?

2017-08-08 7:45 pm

Divide 2x^3+5x^2+7x+1 by 2x+1?

2017-08-05 12:04 am

calculate the volume of 10^21 molecules at NTP?

2017-07-24 6:24 pm

without actually calculating the cubes, find the value of 48^3 - 30^3 - 18^3.?

2017-07-16 12:22 am

Against the wind a plane travels 5600 km in 7hrs. With wind the plane travels 8160 km in 8 hrs. rate in still air and rate of wind?

2017-07-05 10:13 pm

When is 'income' countable and uncountable? Can you please give some sample sentences? Thank you!?

2017-06-14 6:04 pm

Is there a book that I can buy online that contain all those infinite math problems like Ramanujan's infinite series and such things solved?

2017-05-27 6:02 pm

How much is your electricity bill each month?

2017-05-25 12:18 am

How does starting a double/triple major process being after you receive a B.S. in one major already?

2017-05-24 8:24 am

How to enter R&D as an electrical engineer?

2017-05-09 3:47 am

How many different groups can be formed from 6 teachers and 30 students if the group consists of 3 teachers and 3 students?

2017-03-28 4:50 am

2017-03-27 10:27 pm

What is the use of Parentheses?

2017-03-27 9:36 am

How many galaxies are there in the universe?

2017-03-26 2:01 am

Find x for which 3cos2x + 4sin2x is minimum.?

2017-03-15 2:36 am

Please help, and provide the corrects answers. It will bring my grade up.?

2017-02-25 2:57 pm

Integrate x^7/ x+1?

2017-02-24 6:59 pm

the sector of a circle has a central angle θ=(π/4) and area (9π/8) ft2., what is the radius of the circle?

2017-02-14 11:34 pm

Can someone help me factor x^4-3x^2+2?

2017-02-03 2:25 pm

How many grams of H2 are needed to produce 14.88 g of NH3?

2017-02-02 10:15 pm

Which ions below which possess the electron configuration of a noble gas.?

2017-01-20 8:43 am

On saturday, Mr. Hawkins ran 2 7/8 miles, and Mr. Burger ran 3 1/2 miles. How much farther did mr. Burger run than mr. Hawkins?

2016-12-13 3:20 pm

How do you know what radioactive decay equation represents a a fusion reaction?

2016-12-13 1:49 pm

Is the following an opinion because of "such as"?

2016-12-08 1:34 am

Help with arrow notation? (x, y +5)?

2016-11-25 12:18 am

What is going to happen when AI/technology causes most people to become unemployed (Jobocalypse)?

2016-11-15 12:54 am

Mechanical engineering vs electronic engineering?

2016-11-13 8:13 pm

Consider the given vector field. F(x, y, z) =[7e^xy sin(z) j ]+[ 8y tan^−1(x/z) k] Find the curl of the vector field and the divergence?

2016-11-10 8:29 am

When capacitors are in series do they still charge to the supply voltage?

2016-10-14 6:21 pm

If you have 0.132g of NO2 at a pressure of 100kPa and a temperature of 25 Degrees Celsius, what is the volume in dm^3?? Chem a level help?

2016-10-08 1:46 am

Is Aerospace engineering a stable job/career?

2016-10-06 8:13 pm

I keep hearing that once your in University, you can t fail, whether high or low, you ll get the degree True/False?

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