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bekas [8.4K]
3 years ago
9

A ball of putty is dropped from a height of 2 m onto a hard floor, where it sticks. Part A What object or objects need to be inc

luded within the system if the system is to be isolated during this process?
1) Solar system
2) floor,ball
3) human
4) dropping a ball
5) earth
Physics
1 answer:
aleksklad [387]3 years ago
6 0

Answer:

As the ball falls from a certain height and then sticks to the floor so this system will include the following objects.

ball, floor, Earth

2 is a correct option.

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Which is more dense, cold freshwater or warm seawater?
svp [43]
Cold freshwater<span> is </span>denser<span> than </span>warm seawater<span>, because of the salinity and temperature variations. Cold water would have less salt since the solubility of the salt is lower as compared to warm water. Hope this answers the question. Have a nice day.</span>
4 0
3 years ago
Read 2 more answers
si se deja caer un carrito desde el punto mas alto de ua psta de coches cuya altura es de 1.4m cual es la velocidad maxima que p
forsale [732]

Answer:

v = 5.24[m/s]

Explanation:

Este problema se puede resolver por medio del principio de la conservación de la energía, donde la energía potencial es igual a la energía cinética. Es decir a medida que el carrito desciende su energía potencial disminuye, pero su energía cinética aumenta.

E_{kin}=E_{pot}

Donde:

E_{kin}=\frac{1}{2} *m*v^{2} \\\\E_{pot}=m*g*h

Ahora reemplazando:

\frac{1}{2} *m*v^{2}=m*g*h\\\\0.5*v^{2}=9.81*1.4\\v=\sqrt{\frac{9.81*1.4}{0.5} }   \\\\v=5.24[m/s]

6 0
3 years ago
You position two plane mirriors at right angles to each other a light ray strikes one mirrior at an angle of 60 to the normal an
Dafna1 [17]

Answer:

30 degrees

Explanation:

Reflects off of mirror 1  at   60 degrees....this makes it incident to second mirror at 30 degrees ....then angle of reflection equals this angle of incidence = 30 degrees

See atached diagram

4 0
2 years ago
Not only did Skid get shot out of a cannon when he was a clown in the circus, but he was also launched into the air by a vertica
tiny-mole [99]

Answer:

v = 16.11 m / s

Explanation:

For this exercise we must use the principle of conservation of energy. We set a reference system on the part of the platform without elongation

starting point. When the spring is compressed

        Em₀ = K_e + U = ½ k x² + m g x ’

final point. The point where it leaves the platform

        Em_f = K = ½ m v²

energy is conserved

         Em₀ = Em_f

         ½ k x² + m g x ’= ½ m v²

         v² = \frac{k}{m}  x² + g x

let's calculate

         v² = \frac{8700}{55}  1.25² + 9.8 1.25

         v² = 247.159 + 12.25 = 259.409

         v = 16.11 m / s

8 0
3 years ago
Please help on this one?
scoray [572]

option B open system

because in open system energy and mass can escape from the system or can be added to it.

8 0
3 years ago
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