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VashaNatasha [74]
2 years ago
13

un cuerpo solido de cierto material,se midio su masa y se encontro un valor de 450 gramos, al medir su volumen este fue de 2890c

cm³. calcular la densidad en el sistema internacional
Physics
1 answer:
vaieri [72.5K]2 years ago
7 0

Answer:

my bad i wish i could ansrew

Explanation:im only six

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The spectra of most stars are dark-line spectra because ________.
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A cheetah can run 113 km/h in short busts. How far can a cheetah run in 0.25 hours (15 minutes)?
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Which of the following is true of iron? a. It has the highest electrical conductivity of any metal. b. It can exist in many allo
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a moving ball rolls into a stationary ball. the total momentum of both balls after the collision will be
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A block of mass m = 2.0 kg lies on a rough ramp that is inclined at an angle θ = 20oto the horizontal. A force F of magnitude 5.
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a) 0.64 b) 2.17m/s^2 c) 8.668joules

Explanation:

The block was on the ramp, the ramp was inclined at 20degree. A force of 5N was acting horizontal to the but not parallel to the ramp,

Frictional force = horizontal component of the weight of the block along the ramp + the applied force since the block was just about move

Frictional force = mgsin20o + 5N = 6.71+5N = 11.71

The force of normal = the vertical component of the weight of the block =mgcos20o = 18.44

Coefficient of static friction = 11.71/18.44= 0.64

Remember that g = acceleration due to gravity (9.81m/s^2) and m = mass (2kg)

b) coefficient of kinetic friction = frictional force/ normal force

Fr = 0.4* mgcos 20o = 7.375N

F due to motion = ma = total force - frictional force

Ma = 11.71 - 7.375 = 4.335

a= 4.335/2(mass of the block) = 2.17m/s^2

C) work done = net force *distance = 4.335*2= 8.67Joules

8 0
3 years ago
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