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Vesnalui [34]
3 years ago
10

Select all that apply.

Physics
2 answers:
umka2103 [35]3 years ago
8 0
The true statements are

"Its temperature will rise until reaching 0°C."
And
"Its temperature will remain at 0°C until all the ice melts."

So, basically once the ice has reached 0°C we can conclude that the ice has probably fully melted. However the temperature has to stay there if we want the ice to melt.

We must remember that the melting point of ice is 0°C, and that Ice is completely melted at approximately 0°C so we must have those two statements true
klemol [59]3 years ago
4 0
Temperature will rise until reaching 0°C.
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If you have a block with a mass of 2 kilograms and a rope with a tension of 10 Newton’s, what will the acceleration of the block
omeli [17]

Answer:

5 m/s^2

Explanation:

Assuming the tension in the rope is the only force acting on the block, then we can use Newton's second law:

F=ma

where

F is the net force on the block

m is the mass of the block

a is its acceleration

The tension in the rope is the only force acting on the block, so

F = T = 10 N

The mass of the block is

m = 2 kg

So, solving for a, we find the acceleration:

a=\frac{F}{m}=\frac{10}{2}=5 m/s^2

7 0
3 years ago
A body moves on a coordinate line such that it has a position sequals​f(t)equalstsquaredminus4tplus3on the interval 0less than o
Zanzabum

Answer:

A)  Δf = - 49 m, B)  v (7)  = -56 m / s, a = - 8 m / s², C)  t = 0.866 s

Explanation:

A) In this exercise ask to find the displacement and the average velocity, give the function of the movement

           f (t) = - 4t² +3

and the range of motion 0≤ t ≤ 7

the displacement is

for t = 0

           f (0) = 3

for t = 7 s

           f (7) = - 4 7² +3

           f (7) = -46 m

the total displacement is

           Δf = f (7) - f (0)

           Δf = -46 - 3

            Δf = - 49 m

the average speed is defined as the displacement between the time interval

           v = Df / Dt

           v = -49 / 7

           v = - 7 m / s

B) the speed and acceleration of the end points of the motion

         

the speed of defined by

          v = \frac{dx}{dt}

in this case

         v = \frac{df}{dt}

         v = -8t

         

let's calculate

          v (7) = -8 7

          v (7)  = -56 m / s

acceleration is defined by

          a = \frac{dv}{dt}

          a = - 8 m / s²

acceleration is constant throughout the movement

C) the point where the direction changes.

This point is a point where the position goes from positive to negative, the point f = 0

        0 = -4t² +3

        t = √¾

        t = 0.866 s

3 0
3 years ago
How many energy levels do the electrons in oxygen occupy?
elixir [45]
The correct answer would be B. The first level contains two and the second level contains six holding a total of eight, the reason eight aren't just in one row is because only two fit in the first row.
8 0
4 years ago
Read 2 more answers
Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant
ExtremeBDS [4]

Answer:

Final Speed: 26m/s

Explanation:

7 0
3 years ago
A 60.watt light bulb runs for 5.0 seconds. How much energy does it use?
VikaD [51]

"watt" means "Joule of energy per second"

"60 watts" means "60 Joules per second"

(60 joules per second) x (5 seconds) = <em>300 Joules of energy</em>

5 0
4 years ago
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