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mezya [45]
3 years ago
7

Cell with structures labeled A, B, and C

Physics
2 answers:
sveticcg [70]3 years ago
6 0
The answer is A. :)
OLEGan [10]3 years ago
5 0
I agree as well the answer is A as well
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In the absence of air resistance two balls are thrown upward from the same launch point. Ball a rises to a maximum height above
diamong [38]

Answer:

Va is two times greater than Vb

Explanation:

The maximum height reached by the balls are:

Ymax = \frac{Vo^2}{2g}

Since we are told that Ya = 4Yb:

Ya =  \frac{Va^2}{2g} = 4* Yb = 4 * \frac{Vb^2}{2g}

Simplifying the equation:

Va^2 = 4*Vb^2

Va = 2*Vb

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3 years ago
In a police ballistics test, 2.00-g bullet traveling at 700 m/s suddenly hits and becomes embedded in a stationary 5.00-kg wood
aksik [14]

Answer:

  • Here we use the conservation of momentum theorem.

  • m stands for mass, and v stands for velocity. The numbers refer to the respective objects.

  • m1v1 + m2v2 = m1vf1 + m2vf2

  • Since the equation is perfectly inelastic, the final velocity of both masses is the same. Let’s account for this in our formula.

  • m1v1 + m2v2 = vf(m1 + m2)

<u>Let’s substitute in our givens.</u>

(0.002 kg)(700 m/s) + (5 kg)(0 m/s) = vf(0.002 kg + 5 kg)

I assume you are proficient in algebra I, so I will not include the steps to simplify this equation.

Note that I have considered the bullet’s velocity to be in the positive direction,

The answer is vf = 0.280 m/s

3 0
3 years ago
Some homes that use baseboard heating use copper tubing. hot water runs through and heats the copper tubing, which in turn heats
AlekseyPX
When you heat a certain substance with a difference of temperature \Delta T the heat (energy) you must give to it is
E(=Q) =mc\Delta T
where c is the specific heat of that substance (given in J/(g*Celsius))
In this case
E=645*0.3850*(28.22-13.20) =3729.8 (Joule)

Observation: the specific heat of a substance is given in J/(g*Celsius) or J/(g*Kelvin)  because on the temperature scale a difference of 1 degree Celsius = 1 degree Kelvin
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A sleigh weighing 2000 newtons is pulled my a horse a distance of 1.0 kilometer (or 1000 meters) in 45 minutes. what is the powe
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Work = Force* Distance
2000*1000=2000000

Power = Work/Time

2000000/45=<span>44444.44 Watts</span>
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3 years ago
Your scores on the PFT will affect your grade<br> Question 1 options:<br> True<br> False
Valentin [98]
False it will not affect your grade
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