serving speed = 170 km/h
now we will convert it into m/s
now it will have two components along x and y directions
also in x and y directions we know
by solving above equation we have
so angle is 6.11 degree below the horizontal
now we have
now time taken by ball to reach the ground will be
now the displacement in x direction will be
now the distance from net will be
So it will land inside the line
Answer:
The earliest documented mention of the spherical Earth concept dates from around the 5th century BC, when it was mentioned by ancient Greek philosophers.[1][2] In the 3rd century BC, Hellenistic astronomy established the roughly spherical shape of the Earth as a physical fact and calculated the Earth's circumference. This knowledge was gradually adopted throughout the Old World during Late Antiquity and the Middle Ages.[3][4][5][6] A practical demonstration of Earth's sphericity was achieved by Ferdinand Magellan and Juan Sebastián Elcano's circumnavigation (1519–1522).[7]
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Answer:
Explanation:
1 meter = 39.37 inches
meters x inches/meters = inches
6.23x10^-4 m x 39.37 in./m=0.245...=2.45x10^-2
256 kPa because p-guage + p-absolute + p-atmospheric = 256
Answer:
f= -9cm, v= -6cm. The focal length of a concave mirror can be estimated by focusing a distant object on a screen. Parallel rays from a distant object converge at the focal plane of the mirror. The distance between the mirror and the screen is the estimated focal length of the concave mirror.
Explanation:
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