Answer:
6.9.
Explanation:
In case of product of two physical quantities with errors , the rule is that the product will contain error equal to the sum of percentage errors of the two physical quantities. Foe example P contains 2% error and Q contains 3% error then P X Q will contain 2 +3 = 5 % error.
(21 ± 1.14 %) x (14±1.9%)
Total percentage error in the result of product
1.14 + 1.19 = 2.33 %.
Produce value = 21 x 14 = 294
percent of error in it = 2.33%
value of error
= 2.33% of 294
= 6.8502 or 6.9.
<h3><u>Answer;</u></h3>
Each will reflect at an angle equal to its angle of incidence.
<h3><u>Explanation;</u></h3>
- <em><u>When light hits a surface or a boundary it bounces of the surface a phenomenon called reflection, which is a property of waves. Reflection occurs such that the incidence angle is equal to the angle of reflection.</u></em>
- Reflection of light depends on whether the surface is smooth or rough. When the light hits a smooth surface it bounces off the surface and all the rays of light moves in the same direction, this type of reflection is called specular reflection.
- On the other hand , when right rays hits a rough surface the rays bounces off the surface and the rays move in different directions, a type of reflection called diffuse reflection.
Answer:
a = 1.02834008 m/s2
Explanation:
given data:
initial velocity u = -1.03 m/s
time t = 2.47 s later
final velocity v = 1.51 m/s
average acceleration is given as a
putting all value to get required value of acceleration:
= 1.02834008 m/s2
Answer:
Internal resistance refers to the opposition to the flow of current offered by the cells and batteries themselves resulting in the generation of heat. Internal resistance is measured in Ohms. ... Example: 1 The potential difference across the cell when no current flows through the circuit is 3 V.
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Fill in the fraction: 3,600/90 = 40; turn it into a unit fraction.
40 mi/min