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Dima020 [189]
4 years ago
9

7th grade science help me plzz

Chemistry
1 answer:
qaws [65]4 years ago
8 0

the answer to the first one is D and the second one is the first one

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The unit used to measure barometric or air pressure
Bumek [7]

Answer:

A barometer is an instrument used to measure air pressure and track weather systems. The most common unit of measurement used in barometers is the millibar (mb).

Explanation:

7 0
3 years ago
Fill in the following information for the element cesium
zzz [600]

Answer:

Explanation:

period:soft metal

group: caesius

family: Alkali

hope this helps i really tried on this one i do know its the

softest metal it basically wax at room temperature

pretty cool

5 0
4 years ago
Read 2 more answers
How much heat is added if 0.5137g of water increases in temperature by 0.871 degrees C?
UNO [17]

Answer:

1.87 J

Explanation:

q = c x m x (T2-T1)

c- specific heat of water (4.186 j/g.C)

q = 4.186 x 0.5137 x 0.871 = 1.87 J

8 0
3 years ago
Drug testing if a person do not use drugs how cam he test positive on hair drug test
Hitman42 [59]

For example, certain medications may influence the results of the test.

Drug test can show the presence of illicit or prescription drugs on hair samples, although the person has not used these drugs.

Some of false positive drug use is because of this medications: antihistamines, decongestants, antibiotics, antidepressants, analgesics and antipsychotics.

7 0
4 years ago
In certain conditions, hydrogen gas produces the emission spectra shown below. What causes the bright lines seen in the spectra?
rusak2 [61]

Answer:

a bright line spectrum is prodecued when an electron falls from a higher energy state

Explanation:

not sure if this is the exact answer you're looking for but it should be similar

7 0
3 years ago
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