Effort The diagram shows a lever of uniform mass supported at
the middle point. Six coins of equal mass are placed at
mark A on the left hand side.
А
B
(a) Can you balance the lever with 12 more coins of
equal mass? If yes, where would you place them? If
not why?
(b) With six coins still on the left, three coins are put on the right at mark B. Where on
the right should you pile an addition of six coins to get a balance?​

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)