Answer:
0.7864m
Explanation:
Ignore air resistance (the ball's horizontal speed stays constant), the time it takes for the ball to travel 1.95 m horizontally at the rate of 4.87 m/s.
t = 1.95 / 4.88 = 0.4s
This is also the time it takes to fall vertically with gravitational acceleration of g = 9.81 m/s2. We can use the following equation of motion to estimate the vertical distance:
Substance Y has more atoms per gram than substance W.
Explanation:
The best conclusion supported by the data suggests that substance Y has more atoms per gram compared to substance W:
Chart;
2.542 W
0.900 X
3.209 Y
1.657 Z
From the chart above see that Y has more specific heat W. This implies that Y will require more energy to raise the temperature of the substance compared to W.
Specific heat is the amount of heat required to raise the temperature of 1g of a substance by 1K.
The more the amount of matter per gram present, the more the specific heat it will have.
learn more:
Specific heat brainly.com/question/7210400
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A : Solid to liquid
Solids have a variable volume and shape before it changed. Liquids can change in shape but have a fixed volume ( ex: water holding it’s shape in the cup until the person spills it )
Answer:
4.2 m/s
Explanation:
The velocity-time graph is piecewise linear. The acceleration in each of the three segments of the graph is uniform. The instant lies between and t = 6.0s 100 s, so the acceleration must be calculated using the slope of the middle segment.
a =
(9.6 -2.4)m/s
------------------
(10.0 -6.0)s
= 1.8 m/s2
The instantaneous velocity is to be found after the object accelerates over an interval T = (7.0 - 6.0) s = 1.0 s, starting from a velocity of 2.4 m/s,
So the velocity at t = 7.0 s is
v = u + aT = 2.4 m/s + (1.8 m/s2)(1.0 s) = 4.2 m/s