Answer:
A new substance is not formed.
Explanation:
Ice melting is not a chemical reaction because when an ice is melting there is no chemical change happening upon the ice. The water molecules are still the same, they are still water molecules.
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Answer:
12/13 kg, 18/13 kg
Explanation:
Let the masses are m and m'.
acceleration, a = 3.2 m/s^2
Force, F = 30 N
Tension, T = 18 N
By the diagram, using Newton's second law
F - T - m'g = m' a .... (1)
T - mg = ma ..... (2)
Substitute the values of F, T and a in equation (1) and equation (2)
30 - 18 = m' (9.8 + 3.2)
12 = 13 m'
m' = 12/ 13 kg
And, 18 = m (9.8 + 3.2)
m = 18/13 kg
Answer:
<h2>2.4</h2>
Explanation:
<h2><em>Hope it help mark as Brainlist</em></h2>
Ω = 2000 rpm, initial angular speed.
t = 30 s, the time for the wheel to come to rest.
Calculate the angular deceleration, α.
w - αt = 0
(209.4395 rad/s) - (α rad/s²)*(30 s) = 0
α = 6.9813 rad/s²
The angular distance traveled, θ, is given by
ω² - 2αθ = 0
θ = ω²/(2α)
= 209.4395²/(2*6.9813)
= 3141.6 rad
The number of revolutions is
3141.6/(2π) = 500
Answer: 500 revolutions
Teacher Cellyn Kyre ensures that her classroom is always ready for the face to face classes is the sentence used in quotas and interviews.
<h3>What is interview?</h3>
Interview is the examination of the candidate from which a person identifies the candidate is fit for the organization o r not. Maximum interview happened between the interviewer and the candidate. or sometime more people can also be present.
Thus, option D is correct.
For more details about Interview, click here:
brainly.com/question/15128068
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