The half-life of carbon-14 is 5,730 years. How many grams of parent material will remain from a 120-gram sample of carbon-14 after 2 half-lives?

Answers

Answer 1

Answer: After 2 half lives, one half of one half of the original material remains. That's one fourth. One fourth of 120 grams is 30 grams remaining.

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Removing the dimensional prefix and express in scientific notation ( include unit)7.4nm6.78 x 10^8 MHz5.36 x 10^6 kV1500mACalculate the following numbers into scientific notation (include units)7800nm + 95pm =2500nm - 7pm =(65x10^4m) x (4.5x10^-6s-1)=(24x10^5m) / (2x10^-8s) =convert the following to the prefix commonly used (use units)55 000 000 Hz4.8x10^4V0.0068s0.00000000234m
A Boy throws a pebble into the center of the pond. A floating leaf near the waters edge oscillates ( moves up and down ) two complete cycles in one second as water waves move past the leaf. The waters wavelength is 10 meters. What is the waves velocity?
What information in the MSDS would be most important to know at the end of an experiment?
Suppose you observe a binary system containing a main-sequence star and a brown dwarf. The orbital period of the system is 1 year, and the average separation of the system is 1 AUAU . You then measure the Doppler shifts of the spectral lines from the main-sequence star and the brown dwarf, finding that the orbital speed of the brown dwarf in the system is 22 times greater than that of the main-sequence star.
NEED ASAP PLEASE !!! Suppose that a block is pulled 16 meters across a floor. What amount of work is done if the force used to drag the block is 22 N? A. 200 J B. 330 J C. 352 J D. 220 J

Harnessing the sun's energy to produce heat or electricity is _____.. A. non-polluting . B.inexpensive . C. possible only in coastal areas. D. a mojor source of air pollution.

Answers

harnessing the sun's energy to produce heat or electricity is : A. Non - Polluting

This energy generating method will cause no dangerous emission for environment (unlike the one that came from fossil fuel), but the energy that produced from the sun tend to be more expensive so it's still not widely used

hope this helps

Harnessing the sun's energy to produce heat or electricity is _____.

Answer: Out of all the options shown above the one that completes the statement above and makes it true is answer choice A. non-polluting. This is called solar power which is also a renewable resource.

I hope it helps, Regards.

What is the speed of a wave with a wavelength of 5 m and a frequency of 6.0 Hz

Answers

The speed of the wave is 30 m/s

Gravitational force decreases with distance. what does this mean for a space traveler who leaves earth in a spaceship?

Answers

This means that the farther away the astronaut is from the Earth, the less force gravity will be applying to his/her spacecraft. With this being said, once the astronaut breaks Earth's atmosphere, he can reduce the throttles a little to save on fuel, because he doesn't need all of that power to escape such a weak gravitational pull :D.

The SI base unit for measuring temperature is the degree Celsius.
a. True
b. False

Answers

a. True. The SI unit for measuring temperature is the degree Celsius

B. False

because Temperature (T) has SI unit Kelvin (K)

Which of the following industries has not seen an increase in hazardous waste production?a. medical
b. food
c. energy
d. electronics

Answers

The correct answer is letter b. food. The food industries has not seen an increase in hazardous waste production. Medical, energy and electronics' waste production are mostly hazardous. These hazardous material are dangerous to the environment and as well to our health.

Answer:

food

Explanation:

You cant see the cells in your body because most of them are very small true or false?

Answers

Answer: The given statement is True.

Cells are the basic fundamental, structural, and functional unit of all living organisms.

Cells are the microscopic structures, which are responsible for performing all the functions of life. Thus, cells present in the body of living organisms can not be visible through naked eyes.

Therefore, the given statement is True.

True you can't see them because most of them are way too small to see.

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The strength of the force of gravity depends ona. the masses of the objects and their speeds. b. the masses of the objects and the distance between them. c. the weight of the objects and their speeds. d. the masses of the objects and their weights.

If you drop a 50 gram piece of metal that has a temperature of 110°Celsius into 1000 grams of water at 25°Celsius, what best describes what would occur?A.) The water will quickly reach the boiling point. B.) The water’s temperature will stay the same, but the metal will cool down. C.) The water’s temperature will increase, and the metal will stay constant. D.)The water and the metal’s temperature will reach the same temperature.