Tuesday

July 29, 2014

July 29, 2014

Total # Posts: 22

**maths**

find the height of a pole which casts a shadow 22 cm long at a time and place where the shadow of a stick one meter long ig is 55cm

**pre calculus **

The age of a document is in dispute, so archaeologists test for carbon-14. Due to radioactive decay, the amount A of carbon -14 present compared to the initial amount A0 after t years is given by the formula A(t) = A0e^-0.000124t . If 72% of the original amount of carbon- 14 i...

**pre calculus **

A sum of $5000 is be invested in a bank. if the annual interest is 10% and compounded monthly, how long will it take for the original investment to double.

**pre calculus **

Which is worth more after 5 years, an investment of $1000 at 5% interest compounded semi - annually(twice a year). or an investment of $1000 at 5% interest compounded continuously?

**Physics**

What is the difference between converging and diverging waves? What happens to a converging wave after it has converged?

**Physics**

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...

**Physics**

A vibrator in a ripple tank vibrates with a frequency of 3.0 Hz and an amplitude of 2.5 cm. The resulting waves travel away from the source with a speed of 2.5 cm/s, passing under various markers floating on the water. (a)In what direction(s) do the marker move? (b) With what ...

**Physics**

A point source is generating circular water waves. (a) What does the amplitude of the wave near the source depend on? (b) What happens to the amplitude of the wave as it spreads outward? (c) Why the amplitude of a wave changes as it spreads outwards?

**MATHEMATICS**

alpha +beta=pie/2 & beta+gama=alpha then tan alpha=?

**Statistics**

(c) define the limits of an interval estimate of ƒÊ as x } zƒ¿/2ƒÐ/ãn Because sigma is known

**theory of machine**

all answer required

**theory of machine**

1. the contact ratio is....... (a)zero (b)more than one (c)less than one (d)none of these 2. the ratio of maximum displacement of the forced vibration to the deflection due to the static force is known as................ (a)damping factor (b)magnification factor (c)damping coe...

**theory of machine**

a differential band brake has a drum of diameter 800mm. the two ends of the band are fixed to the pins on the opposite sides of the fulcrum of the lever at a distance of a=40mm and b=200mm from the fulcrum. the angle of contact is 270 degree and mue = 0.2 .determine the brake ...

**physics**

Q8: Two sinusoidal waves with the same amplitude of 9.00 mm and the same wavelength travel together along a string that is stretched along an x axis. Their resultant wave is shown twice in fig., as valley A travels in the negative direction of the x axis by distance d=56 cm in...

**math order from least to greatest**

how to put 1/4, 1/6 and 1/2 in least to greatest

**maths**

270

**Maths**

1:2

**AP English Language**

no answer the Question..... i do't no //?

**Chemistry**

So do you think that H2SO4 is the better choice? Or shall I stick with CaCO3

**Chemistry**

sorry the rest of the choices are b. Co2 C. HClO4 D HI e H2SO4 I think its a.. since it displaces the ions

**Chemistry**

Stelco has been recently legislated to reduce total SO2 emissions from iron smelting operations. Select the most effective chemical reagent to desulfurize Stelco’s gas emissions a. CaCO3 b. CO2 c. HClO4 d. HI e. H2SO4 I believe the answer is A but I'm unsure with H2SO4.

**science**

Compare the light gathering power of a telescope with a 10-centimeter(about 4-inch) diameter mirror to that of the human eye. (Take a diameter of the pupil of the eye to be about 5 millimeters)

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