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3 years ago

Galileo’s pendulum theory stated that the time taken to swing through one complete cycle of a pendulum depends on what?

Physics

2 answers:

Zarrin [17]3 years ago

4 0

C. it depends on the length of the string

Wittaler [7]3 years ago

3 0

It depends on the length of the pendulum and the strength of gravitational pull acting upon the pendulum.

Hope this helps!

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In a local bar, a customer slides an empty beer mug down the counter for a refill. the height of the counter is 1.15 m. the mug

yarga [219]

A. Let’s say the horizontal component of the velocity is vx and the vertical is vy. 
Initially at t=0 (as the mug leaves the counter) the components are v0x and v0y.
v0y = 0 since the customer slides it horizontally so applied force is in the x component only.

The equations for horizontal and vertical projectile motion are:
x = x0 + v0x t
y = y0 + v0y t - 1/2 g t^2 = y0 - 1/2 g t^2

Setting the origin to be the end corner of the counter so that x0=0 and y0=0, hence:

x = v0x t

y = - 1/2 g t^2

Given value are: x=1.50m and y=-1.15m (y is negative since mug is going down)

1.50m = v0x t ----> v0x= 1.50/t

-1.15m = -(1/2) (9.81) t^2 -----> t =0.4842 s

Calculating for v0x:

v0x = 3.10 m/s

B. v0x is constant since there are no other horizontal forces so, v0x=vx=3.10m/s

vy can be calculated from the formula:

vy = v0y + at where a=-g (negative since going down)

vy = -gt = -9.81 (0.4842)

vy = -4.75 m/s

Now to get the angle below the horizontal, tan(90-Ø) = -vx/vy

tan(90-Ø )= 3.1/4.75

Ø = 56.87˚ below the horizontal

4 0

3 years ago

Read 2 more answers

PLeAsE hElp What is the kinetic energy of 14 Kg traveling at a velocity of 3m/s east

harkovskaia [24]

Answer:

Please see the given attachment.

Explanation:

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Thank you.

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4 0

2 years ago

A wire of Nichrome (a nickel-chromium-iron alloy commonly used in heating elements) is 1.3 m long and 1.6 mm2 in cross-sectional

fredd [130]

Answer: 1.3 *10^6 Ω*m

Explanation: In order to explain this problem we have to use the following expression for the resistence:

R=L/(σ*A) where L and A are the length and teh area for the wire, respectively. σ is the conductivity of teh Nichrome.

Then, from mteh OHM law we have V=R*I so R=V/I=2/3.2=0.625 Ω

Finally we have:

σ=L/(R*A)=1.3/(0.625*1.6*10^-6)=1.3*10^6 Ω*m

5 0

3 years ago

Select the correct answer.

wolverine [178]

The answer is C in this question.

5 0

3 years ago

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How does deformation by drawing of a semicrystalline polymer affect its tensile strength?

Elenna [48]

This effect is explained by increased chain entanglements at higher molecular weights. Increasing the degree of crystallinity of a semicrystalline polymer leads to an enhancement of the tensile strength. Deformation by drawing increases the tensile strength of a semicrystalline polymer.

4 0

3 years ago