No your feet can be on the ground.
Yes, but your feet must be behind the baseline.
A table tennis table is 2 feet 6 inches (76cm) high.
no they don't have to on the floor
yes
A table tennis table is 9 feet (2.74 m) long, 5 feet (1.525 m) wide and 2 feet 6 inches (76 cm) high from the floor. The net is 6 feet (1.83 m) long and 6 inches (15.25 cm) high.
There are 7200 square feet in a tennis court. A tennis court measures 120 feet over all court area by 60 feet wide.
A singles court has an area of 2106 square feet. Doubles is 2964 square ffet, which means a difference of 858 square feet.
The room is 6480 cubic feet. If 192 tennis balls fit in (3 feet) cubed, that's 27 cubic feet and 46,080 tennis balls fit in 6480 cubic feet.
the tennis court is about 78 feet long and 27 feet width the tennis court is about 78 feet long and 27 feet width
High-impact
dont put your foot in front of the base line, toss the ball as high as you can put your racket, make a check mark with your elbow, angle your feet with the net post and serve closer to the serving dash thing
No