Shaila

I have to do a report my tomorrow on Robert Mugabe. I have alot of info from wikipedia, but the paper is still somewhat broken up, and i don't really understand why he is a dictator or what he did. ANy help? http://www.google.com/search?q=Robert+Mugabe&rl...

18 years ago

find the x-intercepts of: x^4-2x^3-8x^2+12x-16

15 years ago

Let A and B be any two points on the plane and O be the origin. Prove that vector AB = vector OB - vector OA. Let x be any other point on the plane prove that vector AB = vector xB - vector xA.

15 years ago

A 1000kg load is suspended from the end of a horizontal boom. The boom is supported by a cable that makes an angle of 35deg with the boom. a) what is the tension in the cable? b) what is the horizontal force on the boom?

15 years ago

In a soccer match, the goal keeper stands on the midpoint of her goal line. she kicks the ball 25m at an angle of 35deg to the goal line. her teammate takes the pass and kicks it 40m farther, parallel to the sideline. The resultant vector is 62.2m if the...

15 years ago

Given that points P(-6,1), Q(-2, -1) and R(-3,4) find: a) magnitude of vector RP b) perimeter of triangle PQR

15 years ago

let vector U = (vector u1, vector u2) vector V = (vector v1, vector v2) and vector W = (vector w1, vector w2) Prove each property using Cartesian vectors: a) (vector U+V)+W = vector U+(v+W) b) k(vector U+V) = k vector U + k vector V c) (k+m)vector U = k v...

15 years ago

I need help finding two interesting novels which have the same theme that could be compared in an essay. Can any one suggest me any number of novels which would be worth reading and writing an essay about. I like reading murder and romance novels.

15 years ago

A stage trick involves covering a table with a smooth cloth. When the cloth is suddenyl pulled horizontally, the dishes "magically" stay in position and drop on to the table. a)identify all the forces acting on the dishes during the trick b)explain ho ine...

15 years ago

Identify the defining characteristic of inertial and non-inertial frames of reference. Give an example of each type of frame of reference.

15 years ago

Pushing a grocery cart with a force of 95N applied at an angle of 35deg own from the horizontal, makes the cart travel at a constant speed of 1.2m/s. What is the frictional force acting on the cart?

15 years ago

An ice skater pulls three small children, one behind the other, with masses 25kg, 31kg, and 35kg. Assume that the ice is smooth enough to be considered frictionless. If the skater is holding onto the 25kg child, find the tension in the arms of the next ch...

15 years ago

When you pull on a rope, the rope pulls back on you. Describe how the rope creates this reaction force.

15 years ago

A 0.30kg lab cart is observed to accelerate twice as fast as a 0.60kg cart. Does that mean that the net force on the more massive cart is twice as large as the force on the smaller cart? Explain.

15 years ago

Three identical blocks, fastened together by a string, are pulled across a frictionless surface by a constant force. Compare the tension on string A to magnitude of applied force F.

15 years ago

A barge is heading directly across a river at35km/h while you are walking on the barge at 4km/h in the same direction as the barge is heading. The current is flowing downstream at 1.4km/h. a) What is your velocity relative to the shore? (7.6km/h) b) What...

15 years ago

consider a rhombus ABCD a) find the resultant of vector AB + vector AD and vector AB - vector AD? (cosine rule) b) What will be the value of the dot product of vector AB + vector AD and vector AB - vector AD always be? (always zero) c) Is this value of th...

15 years ago

A crate is dragged 3m along a smooth level floor by a 30n force applied at 25deg to the floor. Then it is pulled 4m up a ramp inclined at 20deg to the horizontal, using the same force. Then, the crate is dragged a further 5m along a level platform using t...

15 years ago

a) Describe the form of the coordinates of all points that are equidistant from the x- and y-axes. b) Describe the form of the coordinated of ll points that are equidistant from the x-, y- and z-axes.

15 years ago

Prove that vector i,j and k are mutually orthogonal using the dot product. What is actually meant by mutually orthogonal?

15 years ago

Resolve vector u =[3,4,7] into rectangular components, on which is collinear with vector v =[1,2,3].

15 years ago

A 64kg person is standing on a scale in an elevator. the elevator is rising at a constant velocity but then begins to slow, with an acceleration of 0.59m/s^2. What is the sign of the acceleration? What is the reading on the scale while the elevator is acc...

15 years ago

How does and Atwood machine make it easier to determine g - the acceleration due to gravity, rather than by just measuring the acceleration of a free-falling object?

15 years ago

Two objects are moving in different direction. Under what circumstances can you treat this as one-dimensional problem?

15 years ago

By the mid-1800s, steam driven elevators with counterweights had been developed. However, they were not in common use until 1852, when Elisha Otis invented an elevator from falling if the cable broke. How do you think that the invention of a safe elevator...

15 years ago

You are pushing a 53kg crate at a constant velocity up a ramp onto a truck. The ramp makes an angle of 22deg with the horizontal. If your applied force is 373N, what is then coefficient of friction between the crate and the ramp?

15 years ago

Book suggestions to read with Sula by Toni Morrison, i have to read a second book realted to the above book either in themes or in criticism. Can anyone give me a list of a couple of books i could choose from?

15 years ago

I need to write an essay for life of pi which is five to six pages long, could anyone please give me suggestions what to write about, I find the practice of religion interesting as well as the sorry telling vs the reality but i do not know how to formulat...

15 years ago

What is the role of christainity in Life of Pi?

15 years ago

While Hiking in the wilderness, you come to the top of a cliff that is 60.0m high. you throw a stone from the cliff, giving it an initial velocity of 21m/s at 35deg above the horizontal. How far from the base of the cliff does the stone land? (85m) I trie...

15 years ago

During baseball practice, you go up into the bleachers to retrieve a ball. You throw the ball back into the playing field at an angle of 42deg above the horizontal, giving it an initial velocity of 15m/s. If the ball is 5.3m above the level of the playing...

15 years ago

Can anyone suggest names of books which include friendship between two women, or a book written by an American African.

15 years ago

a) how is life of pi a story within a story within story? ( i know the first part a story within a story, but the other within the story, i am confused) b) i am going to write an essay about story telling on Life of Pi by Yann Martel and so far have ideas...

15 years ago

Imagine that you are solving a problem in projectile motion in which you are asked to find the time at which a projectile reaches a certain vertical position. when you solve the problem you find out two different positive values for time that both satisfy...

15 years ago

What properties of projectile motion must you apply when deriving an equation for the range of a projectile? (is it the trignometric identity??)

15 years ago

Suppose you knew the maximum height reached by a proejctile. Could you find its launch angle from this information alone? If not, what additional information would be required? (No it is not enough, the initial velocity? i also think yes because the highe...

15 years ago

What type of acceleration is associated with uniform circular motion?

15 years ago

If you were swingin a ball on a string around in a circle in a vertical plane, at what point in the path would the string be the most likelt to break? Explain why In what direction would the ball fly when the string broke?

15 years ago

A centrifugal force, if it existed, would be directed raidally outward from the centre of the circle during a circular motion. Explain why it feels as though you are being thrown outward when you are riding on an amusment park ride that causes you to spin...

15 years ago

On a highway, why are sharp turns banked more steeply than gentle turns?

15 years ago

Find the gravitational force between earth and the sun. I am using the formula Fg = (G*m1*m2)/(r^2) where G = 6.67*10^-11 m1 = 6.0*10^24kg m2 = 2.0*10^30kg r = should i use the sun's radius or the earths (Rearth = 6.38*10^6; Rsun = 6.96*10^8) either way i...

15 years ago

Describe the objective, apparatus and results of the Cavendish experiment

15 years ago

Describe how Newton used each of the following phenomena to support the law of universal gravitation a) the orbit of the moon b) kepler's third law

15 years ago

Explain how you can weigh a planet? ( Is it by the combination of the netwons law of univeral gravitation and keplers third law; t^2/r^3 = 4(pi)^2/G(Msun) )

15 years ago

The polar- orbiting environmental satellites (POES) and some military satellites orbit at a much lower level in order to obtain more detailed information. POES complete an Earth orbit 14.1 times per day. What are the orbital speed and the ltitude of the P...

15 years ago

The planet Neptune has an orbital radiu around the sun of about 4.50 * 10^12m. What are its period and its orbital speed?

15 years ago

Why must a geostationary satellite orbit over the equator?

15 years ago

How could you discover a planet without seeing it with a telescope?

15 years ago

A car turns off the highway onto a curved exit ramp. a) What type of motion does the passangers' fram of reference experience relative to the ground? b) Explain why the passangers feel a force to the right as the car turns. c) How would an observer on an...

15 years ago

According to Newton's third law, for every action force there is a reacgtion force, then how can a team win a tug of war contest

15 years ago

Explain why the kinematics equations which describe the motion of the object that has constant acceleration cannot be applied to uniform circular motion.

15 years ago

A 42kg girl jumps on a trampoline, after stretching to its bottom limit; the trampoline exerts an average upward force on the girl over a diplacement of 0.50m. During the time that the trampoline is pushing her up, se experiences an average acceleration o...

15 years ago

Calculate the acceleration of two different satellites that orbit Earth. one is located at 2.0Earth radii and the other located 4.0Earth radii.

15 years ago

write a scalar equation, given it's vector equation. [x,y,z]= [3,7,-5] + s[1,2,-1] + t[5,-2,3] ( I remember my teacher saying that you have to cross s and t, and that will be my normal and thereafter I substitue the point to find the 'D' value of the scal...

15 years ago

Wrtie a scalar equation given it's parametric equation. x = 3-2s+2t y = 1+3s+t z = 5-s-2t

15 years ago

Define momentum qualitatively and quanititatively. (qualitatively - a measure of an object's mass to resist changes in its velocity or acceleration. Is this correct? How do I define momentum quantitatively)

15 years ago

Try to imagine a situation in which the form f=ma would no apply, but the form f=delta p / delta t could be used. Describe that situation. How could you test your prediction.

15 years ago

Use the concept of impulse to explain the difference in the results of a jump using a proper bungee cord and a jump using ordinary rope. (Ans: Is it that impulse is equal to mVf - mVi and the final velocity will be zero for the ordinary rope, however when...

15 years ago

Write a vector equation and scalar equation of the plane containing lines [x,y,z]= [-2,3,12]+s[-2,1,5] [x,y,z]= [1,-4,4]+t[-6,3,15]

15 years ago

Solve the linear system in two space [x,y] = [-12,-7] + s[8,-5] [x,y] = [2,-1] + t[3,-2]

15 years ago

Determine if L1 [x,y,z]=[4,-3,2]+t[1,8,-3] and L2 [x,y,z]=[2,-19,8]+s[4,-5,-9] intersect

15 years ago

Determine the number of solutions for the system without solving. 3x+12y=-27 4x+2y=34

15 years ago

Does the line [x,y,z]=[5,-9,3]+k[1,-12,2] intersect the plane [x,y,z]=[4,-15,8]+s[1,-3,1]+t[2,3,1]? If so, how many solutions are there? ( I tried finding the normal vector, there after finding the "d" value to write in scalar equation, and once it is in...

15 years ago

Find the distance between the parallel line and the plane. line: vector r = [2,0,1]+t[1,4,1] plane: 2x-y+2z=4

15 years ago

Find the distances between planes. plane 1: 2x-y-z-1=0 plane 2: 2x-y-z-4=0

15 years ago

I need to make a Rube Goldberg Machine and it must demonstrate projectile motion, conservation of energy and conservation momentum, any idea on what to make and how to make it? Help please

15 years ago

Find the vector equation of the line of intersection for the pair of planes. Plane one: x+5y-3z-8=0 Plane two: y+2z-4=0 I did half of the work but now i am stuck. the normal of the planes are not parallel and therefore a solution exists, you simultaneousl...

15 years ago

Show that the line [x,y,z]=[10,5,16]+t[3,1,5] is contained in the plane x+2y-z-4=0 I tries writing the vector equation in parametric form and then substituting it into the respective x,y,z in the plane, after simplifying I get 0t=0 does this mean that the...

15 years ago

Under what circumstances is the change in momentum of a system equal to zero?

15 years ago

Two cars of identical mass are approaching the same intersection, one from the south and the one from the west. They reach the intersection at the same time and collide. The cars lock together and move away at an angle of 22deg counterclockwise from the r...

15 years ago

Car A(1750kg) traveling due south and car B (1450kg)due east. They reach the same intersection at the same time and collide. The cars lock together and move off at 35.8km/h[E31.6degS]. What was the velocity of each car before the collided? I tried this qu...

15 years ago

how is this equation derived V'2= V1(2M1)/(M1+M2) (elastic collision - where one object is moving and the other is stationary)

15 years ago

Car A, with mass of 1735kg, was traveling north at 45.5km/h and car B, with a mass of 2540kg, was traveling west at 37.7km/h when they collided at an intersection. if the cars stuck together after the collision, what was their combined momentum? Was the c...

15 years ago

The vertices of a parallelogram are the origin and the points A(-1,4), B(3,6), and C(7,2). Write the vector equations of the lines that make up the sides of the parallelogram

15 years ago

A line has the same x-intercept as [x,y,z]=[-21,8,14]+t[-12,4,7] and the same y-intercept as [x,y,z]=[6,-8,12]+s[2,-5,4]. Write the parametric equation of the line.

15 years ago

A plane is defined by the equations x-4y+2z=16. Find two vectors parallel to the plane.

15 years ago

Consider the plane that contains points A(2,3,1), B(-11,1,2), C(-7,-3,-6). a) Find two vectors that are parallel to the plane. Ans: AC, BC or AB will be parallel to the plane. b) Find two vectors that are perpendicular to the plane. Ans: if i find the nor...

15 years ago

You are given the following two planes: x+4y-3z-12=0 x+6y-2z-22=0 a) Determine if the planes are parallel b) Fine the line of intersection of the two planes. c) Use the two original equations to determine two other equations that have the same solution as...

15 years ago

You are given the following two planes: x+4y-3z-12=0 x+6y-2z-22=0 a) Determine if the planes are parallel b) Fine the line of intersection of the two

15 years ago

write two other equations that have the same solution as this system od equations. 3x-4y=-14 -x+3y=18 I found the solution to the system it is (6,8) there after how do i go about it?

15 years ago

In an experiment, two variables quantities 'x' and 'y' were measure. The relation between x and y is thought to be y=ax^(1/2) x(m)+/- 0.01m y(s) +/- 0.05s 0.10 0.64 0.20 0.90 0.40 1.27 0.80 1.80 1.00 1.90 a) What will you graph in the y- and x- axis in or...

15 years ago

In an experiment, two variables quantities 'x' and 'y' were measure. The relation between x and y is thought to be y=ax^(1/2) x(m)+/- 0.01m 0.10 0.20 0.40 0.80 1.00 y(s) +/- 0.05s 0.64 0.90 1.27 1.80 1.90 a) What will you graph in the y- and x- axis in or...

15 years ago

You are given the following two planes: x+4y-3z-12=0 x+6y-2z-22=0 a) Use the two original equations to determine two other equations that have the same solution as the original two. ANS: the orginal two are not parallel in anyway so can I just take multip...

15 years ago

s(t)= -4.9t^2+15t+1 - write an expression to represent the average rate of change over the interval '1' less than or equal to 't' less than or equal to '1+h'

15 years ago

a) Describe a graph for which the average rate of change is equal to instantaneous rate of change for its entire domain. Describe a real life situation that this graph could represent. b) Describe a graph which the average rate of change between two point...

15 years ago

In an experiment, two variable quantities, x and y were measured. The relation between x and y is thought to be: y= 4(pi)b(x)^3 x(cm) +/- 0.02cm 0.67 0.80 0.90 0.95 y(g) +/- 0.25g 2.25 4.00 5.52 6.60 a) Draw a complete table that allows you to plot the gr...

15 years ago

The speed of a pitched baseball is 46.0m/s. You want to know how fast is your school's star baseball pitcher could throw. You make a pendulum with a rope and a small box lined with a thick layer of soft clay, so that the baseball would stick to the inside...

15 years ago

A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and strikes it with a glancing blow. The first billiard ball moves of at an angle of 29.7deg clockwise from its original direction, wi...

15 years ago

A car with mass of 1875kg is traveling along a country road when the driver sees a deer dart out onto the road. The driver slams on the brakes manages to stop before hitting the deer. The driver of a second car with 2135kg is driving too close and does no...

15 years ago

Imagine that you have a very powerful water pistol. Describe in detail the experiment that you could perform, including the measurements that you would make, to determine the velocity of the water as it leaves the pistol.

15 years ago

It is a communication worth question so i have to be wordy! btw - i got the answer of the projectile motion of the baseball! I was using sine of the angle multiplied by time instead of cosine in the horizontal component Thank you!

15 years ago

Sharp turns are banked more steeply because when turning the vertical component does not matter, however it is the horizontal component should be balanced otherwise the car skids on in the horizontal direction??

15 years ago

Writing the parametric equations of the given line one x=-21-12t and since we want the x intercept the y=z=0 therefore 8+4t=0 and 14+7t=0 in both case the t value is '-2' repeating the similar procedure to find the y-intercept the value of s=-3 there afte...

15 years ago

Isn't there another way to find the vector equation because they are the correct coordinates sample answers are: [x,y]=[-1,4]+t[1,-1] [x,y]=[-1,4]+t[2,1]

15 years ago

Could this be a possible answer for the above question. When catching a ball with bare hands hurts, because it has some force. Since the the ball will always approach one at the same speed, therefore its change in momentum deltaP= Vfinal - Vinitital where...

15 years ago

If i want to find the x-, y- and z- intercepts do i write a new vector equation because we previously found the intercepts but the x-intercept =16 y-intercept = -4 and the z-intercept = 8 i tried writing a vector equation using the one vector as my point...

15 years ago

please check and correct a) in the x-axis i will have the sqrt'x' and the y-axis the 'y' variable b) i make a table with the value of sqrt of 'x' and the given y values c) just plot the points but how do i find the constant, i tried it algebraically i got...

15 years ago

Since the directions are north and west you directly use the Pythagoras theorem to find the resultant speed?? and the tan of the two two get the angle??

15 years ago

for the e part of the question you mean: [x,y,z]=[2,3,1]+t[10,2,0]+s[5,1,0] right??

15 years ago

Could the question be true when the mass is not constant, say maybe in the case of cars. When two cars collide, their masses change but their resultant momentum would be the same before and after the crash so you could you delta p, and the time. Would tha...

15 years ago

Can I make my x value as 3sqrtx, I will get the same straight line? Is that possible, if I use log and the 3sqrtx i get different values of b, which one is more accurate?

15 years ago

How is it possible that mass which is 0.155kg is not taken into consideration? You solve it as a 2D collision and thereafter you obtain the two equations, two variables and you solve you will get V' Thereafter you find if it is elastic or not by equating...

15 years ago

Draw a picture that represents 3*50=150

9 years ago