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svetlana [45]
3 years ago
15

which of these is a chemical change? a. Gas is burned b. ice melts c. metal foil is heated d. paper is shredded

Physics
2 answers:
elena-s [515]3 years ago
8 0
A. The Gas being burnt
Sergio [31]3 years ago
6 0
A is the answer  

fsdddddddddddd
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Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 5.00 s, it rotates 13.9 rad. Du
alisha [4.7K]

Answer:

(a) Angular acceleration is 1.112 rad/s².

(b) Average angular velocity is 2.78 rad/s .

Explanation:

The equation of motion in Rotational kinematics is:

θ = θ₀ + 0.5αt²

Here θ is angular displacement at time t, θ₀ is angular displacement at time t=0, t is time and α is constant angular acceleration.

(a) According to the problem, θ is 13.9 rad, θ₀ is zero as it is at rest and t is 5 s. Put these values in the above equation:

13.9 = 0 + 0.5α(5)²

α = 1.112 rad/s²

(b) The equation of average angular velocity is:

ω = Δθ/Δt

ω = \frac{13.9}{5}

ω = 2.78 rad/s

3 0
3 years ago
What is the kinetic energy of a bike with a mass of 24 kg traveling at 3 m/s?
erastovalidia [21]

Answer:

KE = 1/2mv^2

KE = 1/2(24)(3^2)

KE = 12(9)

KE = 108 J

Let me know if this helps!

5 0
3 years ago
A 34.00 kg sample of mud has a specific heat of 2,512 J/kg °C.
Elena-2011 [213]

Answer:

B ig lol

Explanation:

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3 years ago
A passenger train travels 295 miles in the same amount of time it takes a freight train to travel 225 miles. The rate of the pas
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Answer:

9.3

Explanatin:

7 0
3 years ago
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