3 years ago

What is angle between the vectors 2i -3j +K

Physics

1 answer:

Gnom [1K]3 years ago

3 0

Answer:

the answer is B

Explanation:

edg 2020

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True or False. In a parallel circuit, the voltage is the same anywhere in the circuit.

FrozenT [24]

True! hope this helps:)

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3 years ago

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PLEASE HELP QUICKLY THANKS

Dmitriy789 [7]

Answer: the answer is d

Explanation:

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3 years ago

A -kilogram car travels at a constant speed of 20. meters per second around a horizontal circular track. The diameter of the tra

Tatiana [17]

Answer:

The centripetal acceleration of the car is $8\ m/s^2$ .

Explanation:

Let the mass of the car, $m=10^3\ kg$

Diameter of the circular path, d = 100 m

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Radius, r = 50 m

When an object moves in a circular path, the centripetal acceleration acts on it. It is given by :

$a=\dfrac{v^2}{r}$

$a=\dfrac{(20\ m/s)^2}{50\ m}$

$a=8\ m/s^2$

So, the centripetal acceleration of the car is $8\ m/s^2$ . Hence, this is the required solution.

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4 years ago

If we start with 48 g of a radioactive substance with a 2 hour 12 life, how much is left after two half-lives?

ivolga24 [154]

Explanation:

Half-life is the time taken for a radioactive material to decay to half its original composition:

Original mass = 48g

Half- life = 2hr

After four half lives;

Initially: 48g

First halving 24

Second halving 12

Third halving 6

Fourth halving 3

After second half life, we would have 12g

At fourth halving, we would have 3g

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3 years ago

Facts of heat and transfer

Goryan [66]

Heat is something that really get hot. And transfers is when you send something to another person or another place.

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