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adelina 88 [10]
3 years ago
14

Please help!!!! Will give brainlest

Physics
2 answers:
Alina [70]3 years ago
7 0

D is true.

And after it's been happening for a while, the system arrives at A .

Evgen [1.6K]3 years ago
4 0

Answer:

D

Explanation:

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If an object has a volume of 2 milliliters and a mass of 10 grams, calculate the density of the object.
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3 years ago
At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 22 knots and ship B is sailing north at 23 kn
Arturiano [62]

Answer:

30.66 knots

Explanation:

Distance of ship A from B at noon = 50 NM

\frac{da}{dt} = Velocity of ship A = 22 knots = 22 NM/h

\frac{db}{dt} = Velocity of ship B = 23 knots = 23 NM/h

Distance travelled by ship A from noon to 3 PM = 22×3 = 66 NM

a = Total distance travelled by ship A = 50+66 = 116 NM

b = Total distance travelled by ship B till 3 PM = 23×3 = 69 NM

c = Distance between Ship A and B at 3 PM = √(116²+69²) = 134.97 NM

a²+b² = c²            (Pythagoras theorem)

Now differentiating with respect to time

2a\frac{da}{dt}+2b\frac{db}{dt}=2c\frac{dc}{dt}\\\Rightarrow a\frac{da}{dt}+b\frac{db}{dt}=c\frac{dc}{dt}\\\Rightarrow \frac{116\times 22+69\times 23}{134.97}=\frac{dc}{dt}\\\Rightarrow \frac{dc}{dt}=30.66\ NM/h

∴ The velocity with which the distance is changing at 3 PM (3 hours later) is 30.66 knots

5 0
3 years ago
Which are reactions that release energy? endothermic reactions exothermic reactions decomposition reactions
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Hope that helped you.
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Explanation:

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It's not the potential energy.  It's just the potential.

It's greatest at the positive terminal of the battery or power supply.


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3 years ago
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