# Posts by salma

Total # Posts: 30

**Physics**

A 100 watts light bulb has an average life of 2000 hours. How much energy does it consume over its lifetime? The only thing I got was power=100 watts and time = 2000 hours but I need to convert to seconds and I don't kn how to do that.

**Physics**

A 100 watts light bulb has an average life of 2000 hours. How much energy does it consume over its lifetime? The only thing I got was power=100 watts and time = 2000 hours but I need to convert to seconds and I don't kn how to do that.

**chem**

the relative molecular mass of molecule of chlorine is 72.which properties of the atoms in this molecule are the same

**Math**

how many 3 letter combinations can you make with the letters,l,g,and f ?

**Further mathematics**

Given that cos z=L where z is an acute angle, find an expression for cot z -cosec z÷sec z +tan z

**math**

a. (3.14 * 40)/2 = 62.8 b. (3.14 * 3)/2 = 4.71 apparently that's still wrong

**math**

a. half circle with a radius of 20 cm b. half circle with a diameter of 3 ft find the perimeter of each of the half circles. i thought the answers were 12.42 ft for b and 165.6 cm for a, but i was told that i was wrong

**Geometry**

In a right triangle if sinA=6/7 and cosA=4/7 what is tanA=

**Scince**

Which metel particles are the first to react the heat

**Chemistry**

Calculate the solubility (in grams per 1.00×10^2 mL of solution) of magnesium hydroxide in pure water.

**Chemistry**

How does the solubility of Mg(OH)2 in a buffered solution compare to the solubility of Mg(OH)2 in pure water?

**math**

A caterpillar dump trunk is used at the oil sands near Fort McMurray Alberta. The diameter of one tire is 4m. Part A) find the circumference Part B) how many complete rotations does a wheel make on a 2 km long road?

**math**

Find the distance btw two cities. Assume that the Earth is is a sphere of the radius 4000 miles and that the cities are the on the same longitude(one city is due north of the other).

**Geometry**

Thre

**statistics**

a,c

**Round whole numbers**

The tallest mountain in Cailfornia is MT. Whitney. It is 14,491 feet tall. Round it's height to the nearest thousand

**math**

using the example above, the new highway will be a total of 54 miles long. will the highway be finished in 8 mouths

**maths**

A model of a car has a scale of 1:25,a model is 18cm long,calculate the metres and actual length of the car

**international law**

Is the US claim to a 12 nm territorial sea and a 200 nm exclusive economic zone valid under international law?why or why not?Should the United States become a party to UNCLOS III by accession?What are the arguments both for and against becoming a party? please help me i have ...

**english**

i'm having a hard time paraphrasing this passage in MLA style and also using it as a direct quote in APA please help!! The United States faces two major CT challenges in the Arabian Peninsula—the direct threat posed by al-Qaida in the Arabian Peninsula (AQAP), and the...

**international law**

What are the sources of the rules of international law? Are those rules legally binding? Do powerful states like the United States comply with the rules, or ignore them? Why would states bother to comply with the rules when there are no central enforcement institutions? Is ...

**Science**

It causes floods and mud slides

**physics**

i will and

**math**

27563-23421=4142

**math**

Let's do 100+90+4. You are thinking now this is impossible but no you can sum this the answer of this you are thinking that is 194 so yes cause just you need to put the one of the hundred place, the nine of the tens place and the four of the ones place

**geometry**

in the diagram below of circle o, diameter AB IS PARALLEL TO CHORD cd. if CD=70, WHAT IS MAC?

**Social Stuides**

The flower Hibiscus: This plant grows best in warm places like Florida and Hawaii. Some kinds have also been used as food.

**Math**

I would do this number in word form 110,592:one hundred ten thousand,five hundred ninety two. Now you know how to do this number in word form and you can do the number that you want in word form

**Social Stuides**

He was the General of the Spanish people no he was the General 's Spain. The French fight with the Spanish people because the Spanish people want a new land and the French too.

**math riddle**

125,944