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Vladimir79 [104]

3 years ago

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2 answers:

Pie3 years ago

8 0

Pressure is a way of describing the size of the area that the force is being applied on. For a given force, a smaller area means higher pressure, and a larger area means smaller pressure.

8_murik_8 [283]3 years ago

5 0

Answer:

pascal is the unit of pressure .

hope it is helpful to you

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When drawing a free-body diagram for an object on an inclined surface, which way does the force of gravity point? A. Straight do

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A- Straight Down

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What is the equation for calculating the heat energy released during heating effect of electric current?

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a basketball is tossed upwards with a speed of 5.0 m/s What is the maximum height reached by the basketball from its release poi

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1.275 m

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4 years ago

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A dentist’s drill starts from rest. After 3.20 s of constant angu-lar acceleration, it turns at a rate of 2.51 3 104 re v/m i n.

Gekata [30.6K]

Answer:

$ΔTita = 4205.6 rad$

Explanation:

$w_{i}$ means initial angular velocity, which is 0 rev/min

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t means time t= 3.20 s

one revolution is equivalent to 2πrad so the final angular velocity is:

$w_{f}$ = (2π/60) *2.513*10^{4} rad/s

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so the angular acceleration, α will be:

α = 2628.5 rad/s / 3.20 s

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$w^{2} _{f} =w^{2} _{i}$ + 2αΔTita where ΔTita is the angle in radians

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4 years ago

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an aluminium bar 600mm long, with diameter 40mm, has a hole drilled in the center of the bar. the hole is 30mm in diameter and i

zavuch27 [327]

Answer:

ΔL = 1.011 mm

Explanation:

Let's begin by listing out the given information:

Length (L) = 600 mm = 0.6 m,

Diameter (D) = 40 mm = 0.04 m ⇒ Radius (r) = 20 mm = 0.2 m,

Area (cross sectional) = πr² = 3.14 x .02² = 0.001256 m²,

Modulus of Elasticity (E) = 85 GN/m²,

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Using the formula, Stress = Load ÷ Area

Mathematically,

σ = F ÷ A = 180 x 10³ ÷ 0.001256

σ = <u>143312.1 KN/m</u>²

Modulus of elasticity = stress ÷ strain

E = σ ÷ ε

ε = ΔL/L

85 x 10⁹ = 143312.1 x 10³ ÷ (ΔL/L)

ΔL = 143312.1 x 10³ ÷ 85 X 10⁹ = 1686.02 * 10⁻⁶

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ΔL = 1.011 x 10⁻³ m

ΔL = <u>1.011 mm</u>

∴The bar contracts by 1.011 mm

4 0

3 years ago