# Posts by Farah

Total # Posts: 144

**Math - derivative of cosine**

y=8cos((1/2)x)+10 dy/dx = -4sin((1/2)x) What is the maximum slope from 0 - 4(pi)? I tried equating the endpoints, but it does not work, can someone teach me how to find maximums and minimums?

**Physics - Scientific models**

a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people that you feel might ...

**Physics - wavefronts and wavelets**

Describe how the wavelets that form in the wavefront apparently vanish behind it?

**Physics - Sound Energy (check + help)**

Sound, a form of energy can be modeled by using two distinctly different approaches. a) Describe the propagation of sound energy through air by discussing the motion of individual particles. Include possible mathematical equations that might apply. Ans: Sound energy ...

**Physcis - scientifc models and theories.**

a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people that you feel might ...

**Physcis - Wavefront and wavelets**

Describe how the wavelets that form in the wavefront apparently vanish behind it?

**Physics - Sound Energy (check + help)**

Sound, a form of energy can be modeled by using two distinctly different approaches. a) Describe the propagation of sound energy through air by discussing the motion of individual particles. Include possible mathematical equations that might apply. Ans: Sound energy ...

**Physics - Sound Energy propagation**

Sound, a form of energy can be modeled by using two distinctly different approaches. a) Describe the propagation of sound energy through air by discussing the motion of individual particles. Include possible mathematical equations that might apply. Ans: Sound energy ...

**Physcis -wavelets and wavefronts**

Describe how the wavelets that form in the wavefront apparently vanish behind it?

**Physcis - scientifc models and theories.**

a) Do you believe that some current accepted scientific models or theories might be held in high regard because of the structure of the scientists who proposed them? b) Suggest on possible model or theory that is currently accepted by a majority of people that you feel might ...

**Physics - gravitational fields**

The planet Neptune has gravitational field intensity of 10.3nékg at a height of 1.00*10?6m above its surface. If the radius of Neptune is 2.48*10?7m, what is its mass

**Physics - centripetal acceleration**

What is the centripetal acceleration of a satellite orbiting Saturn at the location exactly on Saturn radius above the surface of Saturn

**Physics - Charge on sphere (check + help)**

Two 2.0g spheres are attached to each end of a silk thread 1.20m long. The spheres are given identical charges and the midpoint of the thread is then suspended from a point on the ceiling. The spheres come to rest in equilibrium, with their centers 15cm apart. What is the ...

**Physics - Spring balls**

A 275g ball is resting on top of the spring that is mounted on the floor. You exert a force of 325N on the ball and it compresses the spring 44.5cm. If you release the ball from the position, how high above the equilibrium position of the spring-ball system will the ball rise?

**Math - derivative of a rational function**

find the 1st derivative of f(x) = x/(x-1)2 Is the 1st derivative f'(x)= -x-1/(x-1)^3

**Health Econ**

The probability of death from running a red light is 15%. People who run the red light do not want to lose the 2 minutes where they have to wait for the light to turn green again. Assume the average salary is $25 an hour. Compute the value of life using the Jones-Lee approach.

**ap chemistry**

Definetly E

**French**

I am thinking it should have been "irez" instead of "allez". which would be future progressive.

**french**

b, august of course come on!

**french**

a.

**french**

un eleve

**french**

2. les orteilles

**Physics - Vertical Motion**

fg +fps = ma where fg is the force due to gravity fps is the force due to the person on the scale ma is the submission of the forces of Fy re-arrange the formula to find Fps.

**Physics 30**

thank you =)

**Physics 30**

A particle accelerated by a potential difference enters a velocity selector. The particle travels staright when the magnetic field is 0.400 T and the electric field is 6.30 x 10^5 V/m. Once the electric field is turned off, a sensor determines that the radius or the particle&#...

**Science**

how does a cloud that is charged with electrons form? What is the charge (positive or negative) of such cloud?

**algebra 3**

tan7pi/6

**physics**

I Asked My Friend, But Thanks Anyways !!! =)

**physics**

Come Again? =S Can You Write the way to the answer please :) THANK YOUUU <3

**physics**

A car of mass 600 kg is travelling at 10m/s. when brakes are applied, it comes to rest in 10 M. what is the average force exerted by the brakes?

**physics**

never mind, i figured it out. thanks

**physics**

can you explain in detail because i tried to follow along with what my professor taught in class, but i couldn't understand anything.

**physics**

Three equal charges are placed at the corners of an equilateral triangle 0.46 m on a side. What are the magnitude of the force on each charge if the charges are each -4.1×10-9 C?

**physics**

Three equal positive point charges of magnitude Q = 4.00ì C are located at three corners of a square of edge length d = 6.9 cm. A negative charge -14.00ì C is placed on the fourth corner. At the position of the negative charge, what is the magnitude of the ...

**Math..number string**

25+10+15+15=

**physics**

the question gives a F(x), the force acting on a car vs t(s). It asks you to find in unit-vector notation p (momentum) I know that p is the area under the curve, but how would you write this in unit vector notation?

**Human Geography**

What is cultural landscape analysis?

**social studies**

How oil is obtained?

**physics**

A space vehicle is traveling at 4100 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 76 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the ...

**physics**

In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 62 m/s (terminal speed), that his mass (including gear) was 71 kg, and that the ...

**physics**

an overhead view of the path taken by a 0.162 kg cue ball as it bounces from a rail of a pool table. The ball's initial speed is 1.11 m/s, and the angle è1 is 64.7°. The bounce reverses the y component of the ball's velocity but does not alter the x ...

**math**

how would I solve 5x+7=42

**CHEMISTRY**

3.5

**science**

Writing variables and hypothesses What about them? i don't even understand them and i have to make up 4 variables and hypothesses about independent and dependent variables i don't even understand them and i have to make up 4 variables and hypothesses about independent ...