Answer:
80%
Explanation:
convert fraction ( ratio ) 32/40 answer 80%
Answer:
B. x - t graph
Explanation:
A position-time (x-t) graph is a graph of the position of an object against (versus) time.
Generally, the slope of the line of a position-time (x-t) graph is typically used to determine or calculate the velocity of an object.
An instantaneous velocity can be defined as the rate of change in position of an object in motion for a short-specified interval of time. Thus, an instantaneous velocity is a quantity that can be found by measuring the slope of a line that is tangent to a point on the graph.
Hence, the x - t graph also referred to as the position-time graph is used for determining the instantaneous velocity from the slope.
<u>For example;</u>
Given that the equation of motion is S(t) = 4t² + 2t + 10. Find the instantaneous velocity at t = 5 seconds.
Solution.
Differentiating the equation, we have;
Substituting the value of "t" into the equation, we have;
S(5) = 42 m/s.
Answer & Explanation:
1 N-m = 1 Joule
So 82 kJ of energy put into the system during (i).
45 kJ of heat leaves the system, so 82 kJ - 45 kJ = 37 kJ is remaining.
(ii) requires 100 kJ of energy but only 37 kJ is available, so 100 kJ - 37 kJ = 63 kJ of heat energy must be added to the system.
Answer:
8 J
Explanation:
Heat = work + change in internal energy
Q = W + ΔU
15 J = 7 J + ΔU
ΔU = 8 J
The Y-component of the vector is 34.65 m.
<h3>What is a vector?</h3>
Vectors are quantities that have both magnitude and direction.
The Y-component of the vector can be calculated using the formula below.
Formula:
- Y = rsin∅............. Equation 1
Where:
- Y = Y-component of the vector
- r = magnitude of the vector
- ∅ = angle of the vector to the horizontal.
From the question,
Given:
Substitute these given values into equation 1
- Y = 82(sin25°)
- Y = 34.65 m
Hence, The Y-component of the vector is 34.65 m.
Learn more about vectors here: brainly.com/question/24855749