The speed of an object can be determined from the distance vs time graph.
You know that speed = distance/time
in the graph, distance/time = slope of the curve.
So SPEED IS GIVEN BY THE SLOPE of the curve in the graph.
● If the distance vs time curve is a straight line, parallel to time axis(x-axis), slope is 0. That means speed is 0. So the object is at rest.
● If the distance vs time curve is a straight line, with some non-zero slope; That means speed is nonzero and constant. So the object is in uniform motion.
● If the distance vs time curve is a curved, the slope is changing. That means speed is changing. So the object is in an accelerated motion.
Answer:
True
Explanation:
The team with the most points at the end of the game is the winner.
I believe the answer is 'A'
Answer:
161376 kJ
Explanation:
The equation for standard Gibbs energy free energy for a reaction is -
ΔG⁰ = ΔH⁰ - TΔS⁰
The values of ΔH⁰, T and ΔS⁰ are given in the question as
ΔH⁰ = -2256 kJ
T = 298 K
ΔS⁰ = -549.1 kJ
So, putting these values in the above equation we get
ΔG⁰ = -2256 - (-549.1 × 298)
ΔG⁰ = -2256 + 163631.8 = 161375.8 ≈ 161376 kJ
Thus, the standard Gibbs free energy for the reaction mentioned in the question will be 161376 kJ.
I would say it’s “B” for the reason that the student did not experiment with a short ramp and large ball as well as a large ramp and a short ball. They have to do those experiments as well before drawing their conclusion.