chrystabelle

A missile of mass 4kg is fired through a stack of asbestos sheets 1.8m thick.If the missile approaches the asbestos with a velocity of 540m/s and emerges with a velocity of 270m/s,determine the average resistance R of the sheets.

14 years ago

A train passes a control tower with a velocity u and has a constant acceleration.At 800m beyond the tower,the velocity is 48km/h;and at 1.6km beyond the tower,the velocity is 64km/h,what is the velocity u ?

14 years ago

write each of the following as trigonometric ratios of acute angles. (a)sin160 degrees (b)cos 310 degrees (c)tan 200 degrees

13 years ago

An object 5cm is placed 30cm in front of a concave mirror.The image is 60cm in front of the mirror.Find (a) the focal length of the mirror.(b) the magnification.(c)the size of the image

13 years ago

To verify her suspicion that a rock specimen is hollow,a geologist weighs the specimen in air and in water.She finds that the specimen weighs twice as much in air as it does in water.The solid part of the specimen has a density of 5 multiplied by 10cubedk...

13 years ago

The equation of the circle is x(squared)+y(squared)-3x -4=0.Find : (i)the coordinates of its center and the radius (ii) the coordinates of the points at which it cuts the x-axis

13 years ago

use the inverse method to solve the system of linear equations -x +3y+2=1 2x+5y=3 3x+y-2z=-2

13 years ago

A lump of ice of density 0.92g/cm^3 is placed is placed into a tumbler containing a coke.The density of coke is 1.150g/cm^3.What fraction of the lump of ice will be above the surface of the coke

13 years ago

DIFFERENTIATE FROM FIRST PRINCIPLES (I)3X (ii)X^2+2X+3 (iii)1/x^2

13 years ago

express x-1/(x+1)(x-2)^2 into partial fractions

13 years ago

If f(x)=x-1/2x^2-x-3.Find (i)f(2) (ii)x if f(x)= 0

13 years ago

If f(x) = x-1/2x^2 - x -3.Find (i)f(2) (ii) x if f(x)= 0 (iii)values of x that are not in the domain of the function

13 years ago

find the limit as x approaches zero for (2+x)^3 -8/x

13 years ago

Give the equation of the hyperbola is 9x^2-4y^2=36.find (i)center and vertices (ii)foci and eccentricity (iii)equation of assymptotes

13 years ago

A ball is dropped from a height of 5m onto a concrete floor and rebounds with a speed of 0.8 times the downward speed on arrival.Find the height reached from the rebound

13 years ago