Which wave form oscillates both parallel and perpendicular to the direction of the wave motion? transverse waves, longitudinal w
aves, circular waves
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The period of a mechanical wave is 2 seconds. What is the frequency of the wave?
20 waves/second
5 waves/second
2 waves/second
0.5 waves/second
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The object distance for a convex lens is 15.0 cm, and the image distance is 5.0 cm. The height of the object is 9.0 cm. What is the height of the image?
3.0 cm
8.3 cm
27 cm
45 cm
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The period of a mechanical wave is 2 seconds. What is the frequency of the wave?
20 waves/second
5 waves/second
2 waves/second
0.5 waves/second
///////
The object distance for a convex lens is 15.0 cm, and the image distance is 5.0 cm. The height of the object is 9.0 cm. What is the height of the image?
3.0 cm
8.3 cm
27 cm
45 cm
1 answer:
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Answer 1) : 62.5 km/hour is the average velocity of the train.
2) The final velocity of the car at the end of 75 m is 14.69 m/s
Explanation:
1) Displacement of the train = 100 km + 150 km = 250 km
Total time train took =1 hour 15 min+ 45 min + 2 hours = 240 min = 4 hours
Average velocity=
62.5 km/hour is the average velocity of the train.
2) The acceleration of the car, a= 1.2
Distance covered by the car,s = 75 m
Initial velocity of the car , = 6 m/s
Final velocity of thre car ,=?
Using third equation of motion:
The final velocity of the car at the end of 75 m is 14.69 m/s
Answer:
The distance is
Explanation:
From the question we are told that
The wavelength of the light is
The distance between the slit is
The between the first and second dark fringes is
Generally fringe width is mathematically represented as
Where D is the distance of the slit to the screen
Hence
substituting values