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Lunna [17]
3 years ago
10

In the 2008 Olympics, Jamaican sprinter Usain Bolt shocked the world as he ran the 100-meter dash in 9.69 seconds. Determine Usa

in's average speed (velocity) for the race.
Physics
1 answer:
-Dominant- [34]3 years ago
4 0

Answer:

His average speed was 10.3199 m/s.

Explanation:

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The rounded atomic mass of K is _______<br> K stands for _____ and has _____ valence electron(s).
netineya [11]

Answer:

Potassium

k = Potassium

Potassium Has 19 Electrons

the atomic mass is 39.0983

4 0
3 years ago
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How many days of a diet of 1910 large calories are equivalent to the gravitational energy change from sea level to the top of Mo
andreyandreev [35.5K]

Answer:

0.58 days is needed

Explanation:

Gravitational energy change from a height change equal to 8848 m for a mass of 53 kg is:

m*g*h = 53*9.81*8848 = 4600340.64 J = 4600.34 kJ

4.184 kJ are equivalent to 1 kcal, then:

4.184 kJ / 4600.34 kJ = 1 kcal / x kcal

x = 4600.34/4.184

x = 1099.5 kcal or large calories

The diet is 1910 kcal/day, then you need 1099.5/1910 = 0.58 days

3 0
3 years ago
URGENT!!!!! I WILL MARK U AS BRAINLIEST!!!!!!! A step-down transformer converts 120 V to 5 V in a phone charger. If the primary
Sloan [31]

Answer:

  25 turns

Explanation:

The voltage ratio is the turns ratio:

  secondary turns / primary turns = secondary voltage / primary voltage

  secondary turns / 600 = 5/120

  secondary turns = 600(5/120) = 25 . . . turns

The secondary coil has 25 turns.

6 0
3 years ago
Explain what is meant by the elastic limit of a spring.​
Law Incorporation [45]

Answer:

The elastic limit of a material is the furthest

point it can be stretched or deformed while

being able to return to its previous shape.

Explanation:

Once a material has gone past its elastic

limit, its deformation is said to be inelastic.

The higher the spring constant, the stiffer

the spring.

8 0
3 years ago
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The first man to orbit the earth was a russian cosmonaut by the name of sergey korolyov yuri gagarin kerim kerimov .
Romashka [77]
The statement is true.
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3 years ago
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