3,348 Answered Questions for the topic Science

Science

12/03/14

A certain wave has a wavelength of 35 meters and a frequency of 4.0 Hz. What is the speed of the wave?

A certain wave has a wavelength of 35 meters and a frequency of 4.0 Hz. What is the speed of the wave?

11/30/14

Doing a science fair experiment on the effectiveness of disinfectant wipes with bacteria growth in petri dishes, what is the Variables?

Doing a science fair experiment on the effectiveness of disinfectant wipes with bacteria growth in petri dishes, what is the Variables?
Science

11/28/14

What is the weight of an 67 kg cart on earth and on the moon?

What is the weight of an 67 kg cart on earth and on the moon?
Science

11/25/14

Why is the poliovirus in places with poor sanitation and heatlh? Eg Pakistan

I have noticed that the poliovirus is only in countries with poor sanitation. Why do these viruses live in such places? Please give descriptive sciene knowledge. Why is the Poliovirus in some... more
Science

11/24/14

i need help in balancing chemical equations

my teacher signed us a homework project its is in balancing chemical equation. if you can comment i will tell you the question
Science

11/24/14

precipitation in the tundra and rainforest

How does the amount of precipitation in tropical rain forest and in the tundra affect how many different species live in a given ecosystem?
Science

11/24/14

Flounders are flat bodied fish. Would they be adapted to live in the head waters of a river? Please explain

Flounders are flat bodied fish. Would they be adapted to live in the headwaters of a river? Please explain
Science Math Chemistry

11/18/14

I have a question about chemistry

Sulfur trioxide, SO3, is made industrially in enormous quantities by combining oxygen and sulfur dioxide, SO2. The trioxide is not usually isolated but is converted to sulfuric acid.If you have... more

11/18/14

A Question about Chemistry

Calculate each of the following   (a) moles of compound in 0.510 g ammonium bromide_____ mol (b) number of potassium ions in 59.8 g potassium nitrate_____ ions (c) mass in grams of 6.02 mol... more
Science Chemistry Ions

11/17/14

Its a question about Chemistry

  For each of the following compounds, give the formula, charge, and number of each ion that makes up the compound. (For example, for H2SO4, enter SO4 in the anion box, -2 in the charge box, and 1... more

11/15/14

Explain why the resultant force of the balloon must be zero.

A hot air balloon is moving at a constant speed of 3 m/s horizontally, but is not moving in a vertical direction. The total mass of the balloon and its passengers is 3000kg and the weight is 30000 N.
Science

11/14/14

I need help

What are some the ways you think department of natural resource is or not fulfilling their mission statement to "secure a sustainable future for our environment"?
Science

11/13/14

Which isotope of an element is the most abundant if you know the elements average atomic mass

Deternine which isotope of an element is the most abundant if you know the elements average atomic mass  
Science Properties

11/11/14

What is a chemical reaction and how is it related to the physical properties of matter.

Chemical equation: a short way to show a chemical reaction using symbols instead of words

how many square kilometres of algae farm would be needed?

A particular algae can be grown at a rate of 30 grams per square metre per day, producing 0.016 litres of biodiesel with an energy density of 9.8 kWh per litre. If it was necessary to produce... more

11/10/14

Calculate the energy cost (kWh/p/d)

Australia produces 20 megatonnes (Mt) of alumina every year, where each tonne requires 3.8 MWh of heat energy to produce. Calculate the energy cost (kWh/p/d) to produce alumina spread across the... more

11/09/14

Calculate the cost of the electricity consumed (in cents).

A 99 W lightbulb is switched on for 4 hours. Calculate the cost of the electricity consumed (in cents), if the electricity tariff is 25c per kWh.
Science

11/08/14

why do you see increase and decrease in the zebra mussels and the quagga mussels invasive species population

The question is a sciencce lab on investigative report.
Science

11/06/14

What would happen to the moon if I took a piece of it away and brought it to Earth?

This is not homework. Its just a question that I have been thinking about.
Science

11/06/14

1. Natalie performed the next experiment: • She measures 100cm3 of water and puts this into a beaker. • Then she adds a 1g indigestion tablet to the water. • Fi

1. Natalie performed the next experiment:• She measures 100cm3 of water and puts this into a beaker.• Then she adds a 1g indigestion tablet to the water.• Finally, she measures the change in... more
Science Genetics

11/06/14

After 30 cycles, calculate how much PCR product (in micrograms) could potentially be produced

 1 microgram of human genomic DNA is amplified in a PCR reaction using primers designed to amplify a 330 base pair fragment. After 30 cycles, calculate how much PCR product (in micrograms) could... more

11/05/14

Science and enzymes and yea

Explain what would happen if a reactant molecule with a different shape to the enzyme came in contact with the enzymes active site     I need need the answer ASAP  thanks dudes 
Science

11/03/14

Why it is easier for a person to float while swimming in the Great Salt Lake than it is at Lake Tahoe.

Explain the answer in a complete sentence please

10/30/14

Is 416 proportional to 52 explain

I think I will need help with math word problems and science and language art and I need dictionary 
Science

10/30/14

calcium , argon , sodium , nitrogen , oxygen , chlorine. which of these can become stable by losing 1 electron

science : atoms and assessment lesson 1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.