3 years ago

Answer question 7 please

Physics

1 answer:

Anna11 [10]3 years ago

6 0

If the only answers are kinetic and potential, then blank 1: potential, blank 2: kinetic

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Explain how heat is related to temperature and thermal energy...

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Thermal energy is directly related to heat because thermal energy is how heat is transfered.

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A 1.6-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an

romanna [79]

Answer:

k = 652 lb/ft

Explanation:

Given :

Weight of the collar = 1.6 lb

The upstretched length of the spring = 6 in

Speed = 16 ft/s

PA = 8 + 10

= 18 inch

Let the initial elongation be $\Delta x_i$

∴ $\Delta x_i$ = 18 - 6

= 12 inch = 1 foot

$PB = \sqrt{13^2+5^2}$

= 13.925 inch

Final elongation in the spring

$\Delta x_B = 7.928$ inch = 0.66 feet

Applying the conservation of the mechanical energy between A and B is

$K.E_A+P.E_{g,A}+P.E_{sp,A}= K.E_B+P.E_{g,B}+P.E_{sp,B}$

$0+mg_r+\frac{1}{2}k(\Delta x_i)^2=\frac{1}{2}mv_B^2+0+\frac{1}{2}k(\Delta x_B)^2$

$\frac{1}{2}k[(1)^2-(0.66)^2]=\frac{1.6}{2}\times (16)^2-1.6 \times 32 \times \frac{5}{12}$

$0.281 \ k =204.8-21.33$

k = 652 lb/ft

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3 years ago

Displacement is the change in velocity of an object.<br><br> True or false

Elden [556K]

Words less true are seldom if ever spoken.

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4 years ago

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Use 3rd law to explain how a fish swims through water. Identify the force pairs and draw a diagram.

vovikov84 [41]

Well as the fish swims he pushes the water behind him which in return push him forward

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A simple pendulum on the surface of Earth is found to undergo 15.0 complete small‑amplitude oscillations in 8.75 s. Find the pen

FinnZ [79.3K]

Answer:

Length of the Pendulum is 14.4 cm

Explanation:

Time period of simple pendulum is given by

$T=2\pi \sqrt{\frac{L}{g} } \\$

time taken for one oscillation is

$T=\frac{time taken}{oscillations} \\T=\frac{8.75}{15} \\T=0.583 s$

Pendulum length on the earth surface is

$L=\frac{T^2g}{4\pi^2 }\\L=\frac{0.583\times 9.8}{4\pi^2 } \\L=0.144 m$

Length of the Pendulum is 14.4 cm

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4 years ago