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3 years ago

What are not examples of velocity

Physics

2 answers:

Nookie1986 [14]3 years ago

8 0

Answer:

Explanation:

Acceleration roughly means “change in velocity.” If this change in velocity is consistently in one direction, the body will reach a point at which its velocity is zero.

Another consideration is when you drop a basketball onto the pavement. The ball falls, hits the ground, and comes back up. Because its direction of motion changed, you know that its velocity MUST have been 0 m/s at some point during the bounce.

This doesn't mean there was no acceleration at this point.

maw [93]3 years ago

4 0

How long it takes to get somewhere

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Most chemical reactions proceed very quickly. True or False

nevsk [136]

The correct answer would be true

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3 years ago

A set of crash tests consists of running a test car moving at a speed of 10.8 m/s (24.2 mi/hr) into a solid wall. Strapped secur

lisabon 2012 [21]

Answer:

The size of the average force which acts on the dummy during that time=4,617 N

Explanation:

Initial Speed=u= 10.8 m/s

Final Speed=v=0 m/s

Mass=57 kg

distance=s=0.720 m

Required:

The size of the average force which acts on the dummy during that time=?

Solution:

According to 3rd equation of motion

$v^2-u^2=2as$

$0^2-(10.8)^2=2*a*0.720$

a=-81 m/s^2 (-ve sign for deceleration)

Note:

In calculating the force, we only use the magnitude of acceleration.

According to Newton's Second Equation:

F=ma

F=57*81

F=4,617 N

The size of the average force which acts on the dummy during that time=4,617 N

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3 years ago

Glass is an example of a ____ material.

blsea [12.9K]

It is transparent since you can see through it.

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3 years ago

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The highest tides occur when

andrey2020 [161]

Answer:

Happens when lunar perigee occurs.

Explanation:

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The nuclear equation is incomplete. Superscript 1 Subscript 1 Baseline H + Superscript 15 Subscript 7 Baseline N yields blank +

atroni [7]

Answer:

The missing species is carbon-12 $^{12}_{\phantom{1}6}\mathrm{C}$ .

The nuclear equation should be $^{1}_{1}\mathrm{H} + ^{15}_{\phantom{1}7}\mathrm{N} \to ^{12}_{\phantom{1}6}\mathrm{C} + ^{1}_{1}\mathrm{H}$ .

Explanation:

Let $A$ represent the mass number of the missing species, and let $Z$ represent its atomic number.

$^{\;\;\;\text{Mass number $\to$ $A$}}_{\text{Atomic number $\to$ $Z$}}\mathrm{X}$ .

For this question, there are three things to consider:

The sum of the mass numbers should be conserved.
Since there's no beta particle ( $\rm e^{-}$ or $\mathrm{e}^{+}$ ) involved, the sum of the atomic numbers should also be conserved.
The atomic number of the missing species should correspond to atomic symbol.

<h3>Mass Number</h3>

The sum of the mass numbers on the left-hand side of this reaction is: $1 + 15 = 16$ .

The sum of the mass number on the right-hand side (including that of the missing species) is $(A + 4)$ .

These two numbers should be the same. In other words, $A + 4 = 16$ . Therefore, the mass number of the missing species would be $12$ .

<h3>Atomic Number</h3>

The sum of the atomic numbers on the left-hand side of this reaction is: $1+ 7 = 8$ .

The sum of the mass number on the right-hand side (including that of the missing species) is $(Z + 2)$ .

These two numbers should be the same. In other words, $Z + 2 = 8$ . Therefore, the mass number of the missing species would be $6$ .

<h3>Symbol</h3>

The atomic number $Z$ of the missing species is $6$ . Look up a modern periodic table. The element with atomic number

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