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3 years ago

bromine, chlorine, and fluorine are examples of A. halogens B. Metalloids C. Noble Gases or D. Alkali metals

Physics

2 answers:

Roman55 [17]3 years ago

5 0

Answer:

Explanation:

Bumek [7]3 years ago

4 0

A) halogens.

bromine, chlorine and fluorine are found in group 7 of the periodic table. thus they are halogens

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natulia [17]

Answer:

t = 3.48 s

Explanation:

The time for the maximum height can be calculated by taking the derivative of height function with respect to time and making it equal to zero:

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3 years ago

A hammer slides down a roof that makes a 30.0°angle with the horizontal. What are the magnitudes of the components of the hammer

dlinn [17]

<h2>Answer:7.14 $ms^{-1}$ ,4.125 $ms^{-1}$ </h2>

Explanation:

Whenever an object is moving in a 2D frame,its motion can be analysed as if it is travelling in two independent 1D frames.

One of such independent 1D frames are along horizontal and another along vertical.

Let $v$ be the total velocity.

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We call the horizontal velocity as $v_{h}$ and the vertical velocity as $v_{v}$ .

$v_{h}$ = $vCos\alpha$

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where $\alpha$ is the angle between the object and horizontal.

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