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inna [77]
3 years ago
11

Question 11 of 25

Chemistry
2 answers:
masha68 [24]3 years ago
7 0

Answer:

a.The waves are absorbed or reflected to capture images

Explanation:

How Things Work: TSA scanners use electromagnetic waves for detection. ... These waves are bounced off the body of the person being scanned to create a three-dimensional image on the computer. The backscatter units instead bounce low-level electromagnetic X-rays off the body to create an image on the computer

Olenka [21]3 years ago
6 0

Answer:

A. The waves are absorbed or reflected to capture images or

information

Explanation:

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Please this is killing me I have no idea how to answer it it’s due in 10 mins please please help
klasskru [66]
I think it’s 45g because

the maximum amount of sugar in a 100ml water is 180 and 25% of 180 is 45
6 0
3 years ago
Put the following elements in order of decreasing (from largest to smallest) atomic radius: Be, Ba, F, Ca.
zhannawk [14.2K]

Answer:  Ba, Ca, Be, F

Explanation:   Size of atom increases when moving down on same group

and decreases when moving on same period from left to right

6 0
3 years ago
In an experiment, Lydia added 50 grams of sugar to 200 milliliters of water. She stirred the mixture, and the sugar eventually d
grandymaker [24]

Answer:

A. A physical change took place during this experiment

Explanation:

A physical change is one of the changes that occurs in a reaction. It is a kind of change characterized by no change to the chemical composition of the substances involved. It involves reactions such as melting, change of state, freezing, boiling etc.

According to this question, Lydia added 50 grams of sugar to 200 milliliters of water, then, stirred the mixture, until the sugar eventually dissolved into the water and couldn’t be seen. This change involved no change in color, odor, or temperature. Hence, Lydia's experiment represents a PHYSICAL CHANGE because only DISSOLUTION occured.

In an experiment, Lydia added 50 grams of sugar to 200 milliliters of water. She stirred the mixture, and the sugar eventually dissolved into the water and couldn’t be seen. The volume of the solution increased, but there was no noticeable change in color, odor, or temperature. Which statement best describes what happened in Lydia’s experiment? A. A physical change took place during this experiment. B. A chemical change took place during this experiment. C. A compound was formed during this experiment. D. A heterogeneous mixture was

3 0
3 years ago
30 POINTS!!!!!! PLEASE HURRY!!!! Four boxes of increasing size and weight must be pushed up a ramp. To push the boxes at the sam
faust18 [17]

The larger and heavier the box, the more force you must use when pushing.

7 0
3 years ago
Read 2 more answers
79. Methane, the chief component of natural gas, burns in oxygen according to the equation
Andrews [41]

Answer:

14 mol

Explanation:

                                CH4(g) + 2O2(g) -------» CO2(g) + 2H2O(g)

from reaction          1 mol                                                2 mol

given                       7 mol                                                x mol

x = (7*2)/1 = 14 mol

6 0
3 years ago
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