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prohojiy [21]
3 years ago
10

Which free body diagram is in equilibrium?

Physics
1 answer:
bearhunter [10]3 years ago
6 0

A. because everything is balanced.

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Convert 150km/hr to m/s<br>showing its workings​
Phantasy [73]
150x1000 (turn km into m)
=150000m
150000 / 60 (hour to min)
=2500m/min
2500 / 60 (min to sec)
=41.6666666
=41,1/3 m/s
3 0
4 years ago
I place an ice cube with a mass of 0.223 kg and a temperature of −35◦C is placed into an insulated aluminum container with a mas
Nadya [2.5K]

To solve this problem it is necessary to use the calorimetry principle. From the statement it asks about the remaining ice, that is, to the point where the final temperature is 0 ° C.

We will calculate the melted ice and in the end we will subtract the total initial mass to find out how much mass was left.

The amount of heat transferred is defined by

Q = mc\Delta T

Where,

m = mass

c = Specific heat

\Delta T =Change in temperature

There are two states, the first is that of heat absorbed by that mass 'm' of melted ice and the second is that of heat absorbed by heat from -35 ° C until 0 ° C is reached.

Performing energy balance then we will have to

Q_i-E_h = Q_m

Where,

Q_ i= Heat absorbed by whole ice

Q_m= Heat absorbed by mass

E_h= Heat energy by latent heat fusion/melting

m_i*c_i \Delta T +m*L_f  = (m_wc_w+m_{al}c_{al})\Delta T

Replacing with our values we have that

0.223*2108(-(-35))+m*3.34*10^5 = (0.452*4186+0.553*902)(27-0)

16452.9+334000m = (1892.072+498.806)*27

Rearrange and find m,

m = 0.144Kg

Therefore the Ice left would be

m' = 0.223-0.144

m' = 0.079Kg

Therefore there is 0.079kg ice in the containter when it reaches equilibrium

8 0
4 years ago
A cleaver physics professor wants to create a situation where a block starts from rest at the top of a 31.0° inclined plane and
UNO [17]

Answer:

Explanation:

Let the length of inclined plane be L .

work done by gravity on the block

= force x length of path

= mg sinθ x L , m is mass of the block , θ is inclination of path

This in converted into potential energy of compressed spring

1/2 k x² = mgL sin31  , k is force constant . x is compression

.5 x 3400 x .37² = 33 x9.8 x sin31 L

L = 1.4

Length of incline = 1.4 m .

8 0
4 years ago
If you are running at the speed of sound, would you still be able to hear the music in your headphones?
Alex Ar [27]
Ask Barry Allen he’s the faster man alive
4 0
3 years ago
The law of conservation of mass states that _______________________________.
xenn [34]
Energy cannot be created nor be destroyed
3 0
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