Crow

This page lists questions and answers that were posted by visitors named Crow.

Questions

The following questions were asked by visitors named Crow.

A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is...

A plane flies horizontally at constant ground speed v=720km/h. The pilot is informed by an air traffic controller that he must immediately change his direction of flight while keeping the same altitude. The pilot performs a turning maneuver by rolling the...

Let f(x)=x2−1. How many distinct real roots are there to f(f(f(x)))=0?

Let f(x)=cos(pi*x/3) g(x)=1^x+(−1)^x h(x)=f(x)⋅g(x) where x is a positive integer. Given that h(x) has a range of exactly 3 different values: a, b and c, what is the value of a^2+b^2+c^2?

If z is a non-real complex number and z^2−26z is a real number, what is the value of z+z¯? z¯ denotes the conjugate of the complex number z.

Given that a and b are real numbers such that the follwoing quadratic equation x^2+(a+6i)x+b+12i=0 has a repeated root, what is the value of a−b?

1+(2/i)+(3/i^2)+(4/i^3)+⋯+(n/i^(n−1))=29+28i what is the value of n? n is positive value

Suppose x and y are real numbers satisfying x(x+i)+y(y+i)−6(8+i)=0. What is the value of x^3+y^3?

Given that the quadratic polynomial f(x)=3x^2+ax+b has real coefficients and f(x)=0 has a complex root 8+5i, what is the value of a+b?

a and b are integers such that the polynomial f(x)=x^4−4x^3−8x^2+ax+b has 1+2i as a solution to f(x)=0. What is the value of 10a+b?

A polynomial function f(x) has degree 6 and has real coefficients. It is given that 3, 2, 11−3i, and 11+28i are roots of f(x). What is the sum of all the roots of f(x)?

In polar coordinates, the graph r=sin(θ)/cos^2(θ) represents the function y=(a_n)*x^n+(a_(n−1))*x^(n−1)+…+a_0 in Cartesian coordinates, where n is a positive integer and (a_i) are real numbers. What is the value of n?

Given w=2+2i and v=−5√3+5i, vw^2 can be expressed as r*(cos(α∘)+i*sin(α∘)), where r is a real number and 0≤α≤360. What is the value of r+α?

Let z be a complex number such that z=2(cos3∘+icos87∘). Then z^6 can be expressed as r(sinα∘+icosα∘), where r is a real number and 0≤α≤90. What is the value of r+α?

Answers

The following answers were posted by visitors named Crow.

it's about use the Ek = Ep and V is using the root mean square velocity

all of that was wrong, i got my answer true

it's about 95.5

i've tell in my post

i've told you in my post just check my question page

how you solve that

33.54 is incorrect

how you do that

sory sir, but it says incorrect

So it would be 110 ? or which n is in QII

i found -40i(sqrt(3)-i) -80i(1/2sqrt(3) -i) 80(1-i*sqrt(3)/2) then i found that r= 80 and α is -120∘ but r+a must be positive integer where is the wrong one

i found that r = 64 and α is 18; any one can clarify this ?

waaaaaa thx steve