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3 years ago

13. Which of the following is considered to be a vector?

Physics

2 answers:

kompoz [17]3 years ago

8 0

B velocity hope it helps

katrin [286]3 years ago

7 0

Answer:

B.) Velocity

Explanation:

A vector is a mathematical object that has a size, called the magnitude, and a direction. For example, a vector would be used to show the distance and direction something moved in.

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Two lightbulbs work on a 120-V circuit One 50 W and the other is 100 W. Which bulb has a higher resistance? Explain pls!!!!

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Answer:

Bulb 1 has more resistance.

Explanation:

Given that,

Two lightbulbs work on a 120-V circuit.

The power of circuit 1, P₁ = 50 W

The power of circuit 2, P₂ = 100 W

We need to find the bulb that has a higher resistance.

The power of the bulb is given by :

$P = \dfrac{V^2}{R}$

For bulb 1,

$R_1=\dfrac{V^2}{P_1}\\\\R_1=\dfrac{(120)^2}{50}\\\\R_1=288\ \Omega$

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$R_2=\dfrac{V^2}{P_2}\\\\R_2=\dfrac{(120)^2}{100}\\\\R_2=144\ \Omega$

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3 years ago

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Anna007 [38]

Answer:

The mass of the another block is 60 kg.

Explanation:

Given that,

Mass of block M= 100 kg

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Time = 0.90 s

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$s=ut+\dfrac{1}{2}at^2$

Put the value into the formula

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Using newton's second law

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$ma=Mg-Ma-mg$

$m(a+g)=M(g-a)$

$m=\dfrac{M(g-a)}{(a+g)}$

Put the value into the formula

$m=\dfrac{100(9.8-2.46)}{2.46+9.8}$

$m=59.8\ \approx60\ kg$

Hence, The mass of the another block is 60 kg.

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3 years ago

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Answer:

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