# Posts by raj

Total # Posts: 319

**Biochemistry**

What kind of isomers can amino acids form? Which isomer is present in most living organisms?

**Chemistry**

When the halogens form ionic compounds, what is the ion charge of the halide ions? negative one

**Calculus**

Factor the following: y = (x-a)^5 . (x-c)^5 . (a-c)^5 It looks already factored to me

**Chemistry**

What is the empirical distinction between emission and absorption spectra? In general terms, how did Niels Bohr explain each of these spectra? In general terms, emission spectra are obtained when the electron is at a high energy level and it falls to a lower energy level. In ...

**Physics**

A hockey puck travelling at 26 m/s [E 22* S] rebounds off the board at 21 m/s [E 22* N]. The puck is in contact with the board for 0.0025 seconds. Determine the average acceleration of the puck over the interval. average acceleration= change in velocity/time a= (Vf - Vi)/time ...

**english**

i am unable to this question complete the following by adding noun clause a)the fact is that__________________ b)this is a clear proof_______________ complete the following by adding noun clause a)Thefact is that______________________ b)This clearly proof__________________ The...

**Algebra & Discrete Geometry**

Determine a vector of magnitude 2 that is parallel to a=(-3, 4).

**Physics**

Calculate the period of the wave if it makes 10 vibrations in 2 seconds. Does anyone know the formula for this? frequency = (number of waves) divided by(observation time) = 10/2 = 5 Hertz period = 1/frequency = ?

**Physics**

When most people are asked what makes rockets lift off they say it's caused by the push of the exploding fuel against the ground. Explain why this is wrong. For every action, there is an equal and opposite reaction. That's from Newton, I think, but it may have been ...

**Chemistry**

What is the chemical equation for the combustion reaction between methanol and air? CH4 + O2 ==> CO2 + H2O. All hydrocarbons produce CO2 and H2O when they are combusted in air. The above equation isn't balanced. I assume you can do that? If not, ask OR take a shot at it...

**Calculus**

Find the sum of two numbers whose sum is 70 and whose product is as large as possible. Ok i got that one equation is y = 70 - x...but how do I show an equation for a product which is as large as possible. The product is P = x (70 - x), where x is one of the two numbers. Set dP...

**Data Management**

List all permutations of the elements of the set {+, -, *) List all subsets (combinations) of the elements of the set {+, -, *)

**Math**

2+2

**Analytical Proof**

The Theorum of Apollonius states in triangle ABC, if M is the midpoint of BC, then AB^2 + AC^2 = 2AM^2 + 2MC^2. Prove this theorum using analytic methods. http://www.google.com/search?hl=en&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=Theorem+of+Apollonius+proof&spell=1

**Geometry and Algebra**

AB is a diameter of a circle with centre O. P is on BA extended, and PT is tangent to the circle. Use the corollary to the Intersecting Secants Property to prove that PT is perpendicular to OT. Here is the diagram (Without the dashes in the "com" and periods instead ...

**Physucs**

A clerk pushes a filing cabinet of mass 22.0 kg accross the floor by exerting a horizontal force of magnitude 98 N. The magnitude of the force of kinetic friction acting on the cabinet is 87 N. The cabinet starts from rest. Use the law of conservation of energy to determine ...

**Pre-Algebra**

Solving it would give u x = -4...but I am not sure how you would graph that. You see, a linear inequality is an inequality that has one of the following four forms: Ax + By < C Ax + By > C Ax + By < C Ax + By > C PLZ!Somebody tell me the answer! PLZZZ! umm,, It ...

**Geometry and Discrete Mathematics (Proofs)**

Observe that the last two digits of 7^2 are 49, the last two digits of 7^3 are 43, the last two digits of 7^4 are 01, and the last two digits of 7^5 are 07. Prove that the last two digits of 7^201 are 07. 7^2 = ...49 7^3 = ...43 7^4 = ...01 7^5 = ...07 7^201 = ...07 Break 201 ...

**Algebra and Discrete Geometry**

A large family wedding for the Smiths will require 113 trays of sandwiches, 116 trays of hors d' oeuvres, and 144 trays of sweets. Hands-Off caterers can make 15 trays of sandwiches, 10 trays of hors d'oeuvres, and 12 trays of sweets in one day. Hands-Free caterers can...