4 years ago

Predict the number of valence electrons for each element based on its location in the periodic table of elements.

Physics

1 answer:

o-na [289]4 years ago

6 0

Answer:

Barium=2

Lead=4

Bismuth=5

Potassium=1

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Explain how sound travels through the air to observer

Harlamova29_29 [7]

Sample:
As soon as the lightning is seen, sound travels in the air for several kilometers until it eventually reaches the observer.

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4 years ago

According to the graph above, how large of a force is needed in order to stretch the string 1.00 meters?

gulaghasi [49]

My guess for this one would be; 400 N

My reasoning would be; it starts at 0 on both X and Y, if you need to get to 1.00 meters thats 4/4. 1/4 of 1.00 is .25, and on .25 its on 100 so multiply it by 4 to make 1.00 and you get 400 N

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3 years ago

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Ralph is also swinging at the park. He has a mass of 72.6 kg, and his maximum velocity at the lowest point in his swing is 7.3 m

pashok25 [27]

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3 years ago

If an aqueous solution has a slippery feel, which type of solution will it most likely be

kap26 [50]

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3 years ago

Donny, who has a mass of 75.0 kg, is riding at 25.0 m/s in his truck when he suddenly slams on the brakes to avoid hitting a squ

marta [7]

Answer:

F = 3750 N

Explanation:

Given that,

Mass of Donny, m = 75 kg

Initial speed, u = 25 m/s

He suddenly slams on the brakes to avoid hitting a squirrel crossing the road, final speed = 0

Time, t = 0.5 s

We need to find the force the seatbelt exert on him. The force is given by :

F = ma

a is acceleration

$F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{75\times (0-25)}{0.5}\\\\=-3750\ N$

So, the force is 3750 N.

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3 years ago