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sveticcg [70]
3 years ago
7

Sublimation is to change from

Engineering
2 answers:
Mashcka [7]3 years ago
5 0

Sublimation is the transition from the solid phase to the gas phase.

Sublimation is an endothermic phase transition. It occurs at temperatures and pressures below the "triple point." Sublimation can be used for many things including transferring images onto clothes and mugs or separating different types of mixtures.

Deffense [45]3 years ago
4 0

Answer:

The process in which a solid changes directly into gaseous form, without transcurring to the "intermediate-form" which would be the liquid form.

Explanation:

Some elements or substances can go directly from solid to gaseous form, and that process is called sublimation.

A common example of sublimation would be the sublimation of dry-ice, which is solid CO_{2}. When the temperature of the dry ice reaches -78.5 ºC or higher, it will start becoming a gas.

Remember:

Solid → gas = sublimation

Solid → liquid = fusion

Gas → liquid = condensation

Gas → solid = deposition

Liquid → gas = evaporation

Liquid → solid = solidification

Hope it helped,

BiologiaMagister

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two cars travel on a straight road from the point. A to point B both cars accelerate to their maximum speed and then continue at
Lady bird [3.3K]

Answer:

Part A

The acceleration of car 2, is larger than the acceleration of car 1

Part B

The average speed of car 2 is larger than the average speed of car 1

Explanation:

The question relates to kinematic motion

Using a similar question for the parameters, we have;

The time it takes car 1 to accelerate to v₁ = 20 m/s is t₁ = 30 s

The time it takes car 1 to reach point B, t₁₂ = 35 s

The time it takes car 2 to accelerate to v₂ = 20 m/s is t₂ = 20 s

The time it takes car 2 to reach point B is t₂₂ = 30 s

Part A

From the kinematic equation of motion, v = u + at, we have;

Acceleration, a = (v - u)/t

Where;

a = The acceleration

v = The final velocity

u = The initial velocity = 0 m/s for both cars as they start from rest

t = The time taken

The acceleration of car 1, a₁  = (v₁ - u₁)/t₁

∴ a₁ = (20 m/s - 0 m/s)/(30 s) = 2/3 m/s²

The acceleration of car 2, a₂  = (v₂ - u₂)/t₂

∴ a₂ = (20 m/s - 0 m/s)/(20 s) = 1 m/s²

The acceleration of car 2, a₂ =  1 m/s² is larger than the acceleration of car 1, a₁ = 2/3 m/s²

Part B

Average speed = Total distance/(Total time taken to reach the distance)

Let 'B' represent the distance to point in meters, we have;

The average speed of car 1 = B/(The time it takes car 1 to reach point B)

∴ The average speed of car 1 = B/35 m/s

The average speed of car 2 = B/(The time it takes car 2 to reach point B)

∴ The average speed of car 2 = B/30 m/s

Noting that the larger velocity is given by the smaller divisor to 'B', we have;

The average speed of car 2 = B/30 m/s is larger than the average speed of car 1 = B/35 m/s

6 0
2 years ago
A motor takes 38 amperes on a 220-volt circuit. Find the horsepower output (hp) of the motor shown with an efficiency of 90%. Ex
IrinaK [193]

This question involves the concepts of power and current.

The power output of the motor is "10.08 hp".

<h3>Power Output</h3>

The power output of the motor can be found using the following formula:

P = ηVI

where,

  • P = Power = ?
  • η = efficiency = 90 % = 0.9
  • I = current = 38 A
  • V = potential difference = 220 V

Therefore,

P = (0.9)(38 A)(220 V)

P = 7524 watt

converting this to horsepower:

P = (7524 watt)(\frac{1\ hp}{746\ watt})

P = 10.08 hp

Learn more about power here:

brainly.com/question/13948282

#SPJ1

7 0
2 years ago
Two hemispherical shells of inner diameter 1m are joined together with 12 equally spaced bolts. If the interior pressure is rais
aliina [53]

Answer:

  F = 2,355 10⁵ N

Explanation:

The pressure is distributed throughout the sphere with the same value and is defined by

           P = F / A

           F = P A

Therefore, on each bolt there is an internal force and external force

      ∑ F = F_int - F_ext

      ∑ F = P_int A - P_atm A

      F = A (P_int - P_atm)

     P_int = 300 10³ + P_atm

     F = A 300 10³

The area of ​​the sphere layer is

    A = π r² = π/ 4 d²

    A = π / 4 1²

    A = 0.785 m2

   

    F = 0.785 (300 10³)

    F = 2,355 10⁵ N

6 0
3 years ago
A gear motor can develop 2 hp when it turns at 450rpm. If the motor turns a solid shaft with a diameter of 1 in., determine the
kramer

Answer:

Maximum shear stress is;

τ_max = 1427.12 psi

Explanation:

We are given;

Power = 2 HP = 2 × 746 Watts = 1492 W

Angular speed;ω = 450 rev/min = 450 × 2π/60 rad/s = 47.124 rad/s

Diameter;d = 1 in

We know that; power = shear stress × angular speed

So,

P = τω

τ = P/ω

τ = 1492/47.124

τ = 31.66 N.m

Converting this to lb.in, we have;

τ = 280.2146 lb.in

Maximum shear stress is given by the formula;

τ_max = (τ•d/2)/J

J is polar moment of inertia given by the formula; J = πd⁴/32

So,

τ_max = (τ•d/2)/(πd⁴/32)

This reduces to;

τ_max = (16τ)/(πd³)

Plugging in values;

τ_max = (16 × 280.2146)/((π×1³)

τ_max = 1427.12 psi

7 0
3 years ago
Why dose bob not let humans touch him one and only Ivan
gogolik [260]
Sorry man i don’t know sorry
8 0
2 years ago
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