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Rina8888 [55]
3 years ago
13

I NEEDD HELLLPPPP!!!!! 20 POINTS

Chemistry
1 answer:
VLD [36.1K]3 years ago
7 0
Newton’s universal law of gravitation states that all objects attract each other with a force -directly- proportional to the product of their masses and -inversely- proportional to the square of the distance between their centers. When considering objects on the surface of the Earth, the force is -away from directly-proportional to the product of the mass of the object and the -acceleration- due to -gravity-at the Earth’s surface. Since the Earth is -larger- than ant object under consideration, the object is drawn -toward- the Earth.
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needs help in coming up with a title for her science project. Problem statement is Do flowers last longer in the water with suga
nikdorinn [45]
Flower and sugar
flowers in sugar water? something along these lines
7 0
3 years ago
A covalent bond is best described as ______(A) a bond between two polyatomic ions.(B) a bond between a metal and a nonmetal.(C)
nekit [7.7K]

Answer:

Option C. the sharing of electrons between atoms

Explanation:

Covalent bond is a type of bond in which the reacting element share their valence electrons in order to attain the noble gas configuration.

4 0
4 years ago
Consider a galvanic cell consisting of the following two redox couplesAlB+ 3e Al , Mga + 2e Mg, (ag. E® = 1.676 V ) E° = 2.356 V
malfutka [58]

Answer:

0.68 V

Explanation:

For anode;

3Mg(s) ---->3Mg^2+(aq) + 6e

For cathode;

2Al^3+(aq) + 6e -----> 2Al(s)

Overall balanced reaction equation;

3Mg(s) + 2Al^3+(aq) ----> 3Mg^2+(aq) + 2Al(s)

Since

E°anode = -2.356 V

E°cathode = -1.676 V

E°cell=-1.676 -(-2.356)

E°cell= 0.68 V

4 0
3 years ago
If a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50
tangare [24]

Answer:

87.5 mi/hr

Explanation:

Because a = Δv / Δt (a = vf - vi/ Δt), we need to find the acceleration first to know the change in velocity so we can determine the final velocity.

vf = 60 mi/hr

vi = 0 mi/hr

Δt = 8 secs

a = vf - vi/ Δt

= 60 mi/hr - 0 mi/hr/ 8 secs

= 60 mi/hr / 8 secs

= 7.5 mi/hr^2

Now that we know the acceleration of the car is 7. 5 mi/hr^2, we can substitute it in the acceleration formula to find the final velocity when the initial velocity is 50 mi/hr after 5 secs.

vi = 50 mi/ hr

Δt = 5 secs

a = 7.5 mi/ hr^2

a = vf - vi/ Δt

7.5 = vf - 50 mi/hr / 5 secs

37.5 = vf - 50

87.5 mi/ hr = vf

7 0
4 years ago
Which option is an example of physical change?
Murljashka [212]

Answer:

They are all physical exept c

Explanation:

8 0
3 years ago
Read 2 more answers
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