Questions by Drl

Questions by Drl

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. UV radiation is called ultraviolet because it has a frequency which is higher than violet radiation (purple

asked Sep 7, 2018

2 answers

4 votes

86.8k views

Find the number of permutations of the first 8 letters of the alphabet taking four letters at a time. a.1680 b.56 c.6720 d.109

asked Jul 5, 2018

2 answers

5 votes

26.6k views

A vitamin has a mass of 5 grams. What is the mass of the vitamin in milligrams? (1,000 milligrams = 1 gram)

asked Feb 28, 2018

2 answers

4 votes

29.3k views

Which is the primary consumer in this food chain?

asked Aug 12, 2017

2 answers

2 votes

30.2k views

A catalyst is _____. -Choices- not used up in a reaction the product of a combustion reaction one of the reactants in a single-replacement reaction a solid product of a reaction

asked May 15, 2017

2 answers

1 vote

66.3k views

Tia cut a 4 meters 8 centimeters wire into 10 equal pieces.Marta cut a 540 centimeters wire into 9 equal pieces. How much longer is one of marras wires than one of tías?

asked Mar 2, 2017

1 answer

1 vote

6.8k views

80,801 to the nearest ten thousand

asked Aug 5, 2016

1 answer

1 vote

61.9k views

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