Answers created by Carlos S.

Back to user's profile
Question #9a548
How do you simplify (2k)!/(2k+2)! to 1/(2(k+1)(2k+1)) ?
A $5 L$ $5 L$ container holds $8$ $8$ mol and $10$ $10$ mol of gasses A and B, respectively. Every five of molecules of gas B bind to two molecule of gas A and the reaction changes the temperature from $360^{o} K$ $360^oK$ to $270^{o} K$ $270 ^oK$ . By how much does the pressure change?
A body weighs 900N on earth's surface. At a distance of twice earth radius above the earth's surface , the weight of the body is: *100N *200N *300N *450?
How do you find the value of two numbers if their sum is 12 and their difference is 4?
An object with a mass of $120 g$ $120 g$ is dropped into $640 m L$ $640 mL$ of water at $0^{\circ} C$ $0^@C$ . If the object cools by $48^{\circ} C$ $48 ^@C$ and the water warms by $3^{\circ} C$ $3 ^@C$ , what is the specific heat of the material that the object is made of?
Which of the figure below is the image of the arrow in a plane mirror?
How do you differentiate $f (x) = {(1 - e^{3 \sqrt{x}})}^{2}$ $f(x)=(1-e^(3sqrtx))^2$ using the chain rule.?
Question #5230c
Question #34c4e
The work- function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately ?: (1) 540 nm (2) 400 nm (3) 220 nm (4) 310 nm
How do you differentiate $f (x) = \frac{x}{e^{3 - x} + x^{3}}$ $f(x) =x/(e^(3-x)+x^3)$ using the quotient rule?
Question #d8599
Question #0c063
How do you find the integral of ∫ dx/(1-x)^2 from negative infinity to 0?
From a rifle of mass 4 kg, a bulle of mass 50 g is fired with an initial velocity of 35 m s^-1. What is the the initial recoil velocity of the rifle?
An object with a mass of $1 k g$ $1 kg$ , temperature of $320^{o} C$ $320 ^oC$ , and a specific heat of $25 \frac{J}{k g \cdot K}$ $25 J/(kg*K)$ is dropped into a container with $16 L$ $16 L$ of water at $0^{o} C$ $0^oC$ . Does the water evaporate? If not, by how much does the water's temperature change?
Question #56175
How do you condense $\frac{1}{2} ({log}_{4} (x + 1) + 2 {log}_{4} (x - 1)) + 6 {log}_{4} x$ $1/2(log_4(x+1)+2log_4(x-1))+6log_4x$ ?
What is the distance between the following polar coordinates?: $(6, \frac{π}{3}), (0, \frac{π}{2})$ $(6,pi/3), (0,pi/2)$
What is the path of the light ray that hits a mirror after passing through its focus?
An object with a mass of $14 k g$ $14 kg$ is lying still on a surface and is compressing a horizontal spring by $1 m$ $1 m$ . If the spring's constant is $7 \frac{k g}{s^{2}}$ $7 (kg)/s^2$ , what is the minimum value of the surface's coefficient of static friction?
Question #fe9da
How do you find $f (x) + g (x), f (x) - g (x), f (x) \cdot g (x), (\frac{f}{g}) (x)$ $f(x)+g(x), f(x)-g(x), f(x)*g(x), (f/g)(x)$ given $f (x) = \frac{3}{x - 7}$ $f(x)=3/(x-7)$ and $g (x) = x^{2} + 5 x$ $g(x)=x^2+5x$ ?
An arched bridge is to be designed that cars may pass over safely a a speed of 180km/h without jumping off the road.what should the minimum or maximum value of the radius of curvature of the arch be?