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2 years ago

11

Both physical and chemical changes are accompanied by a change in the total energy of the system, which is divided into two broa

d categories, ____ energy due to motion and ___ energy due to position

1 answer:

olga2289 [7]2 years ago

8 0

Answer:

I believe <u>kinetic / potential</u>

Explanation:

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How does the law of conservation of energy apply to machinesBased on the law of conservation of energy, how can we reasonably im

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3 years ago

Sound from a source vibrating at frequency 200 Hz travels at the speed of 300 m/s in air.Wavelength of the sound is (in m/s)

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3 years ago

Ana kicks a stationary 0.2kg soccer ball. The ball leaves her foot at a speed of 20 m/s.

elena55 [62]

Answer:a. 24 kg m/s

b. 3/5s

Explanation:

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so the impulse would be (24-0) kg m/s=24 kg m/s

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3 years ago

Nose bleeding occurs as we move towards high altitude, why?

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3 years ago

Read 2 more answers

Consider a long rod of mass, m, and length, l, which is thin enough that its width can be ignored compared to its length. The ro

ehidna [41]

Answer:

Explanation:

The rod will act as pendulum for small oscillation .

Time period of oscillation

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

angular frequency ω = 2π / T

= $\omega=\sqrt{\frac{g}{l} }$

b )

ω = 20( given )

velocity = ω r = ω l

Let the maximum angular displacement in terms of degree be θ .

1/2 m v ² = mgl ( 1 - cosθ ) ,

[ l-lcosθ is loss of height . we have applied law of conservation of mechanical energy .]

.5 ( ω l )² = gl( 1 - cos θ )

.5 ω² l = g ( 1 - cosθ )

1 - cosθ = .5 ω² l /g

cosθ = 1 - .5 ω² l /g

θ can be calculated , if value of l is given .

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3 years ago