Answer:
With an increase in temperature, there is typically an increase in the molecular interchange as molecules move faster in higher temperatures. The gas viscosity will increase with temperature. ... With high temperatures, viscosity increases in gases and decreases in liquids, the drag force will do the same.
Roemer used the diameter of the earth's orbit in his calculation of the speed of light.
Pretty sure its.false if its.wrong
Sorry still. Having issues myself. hope.its right
Answer:
Given,
Explanation:
mass(m)=2400kg
velocity(v)=15m/s
kinetic energy(K.E.)=1/2mv2
KE=1/2×2400×15^2
=1/2×540000
=270000Joule
Answer:
Explanation:
a) the free body diagram of the lower pulley would have two force vectors of equal magnitude acting upward and the block weight acting downward. These must balance so 2F = Wt
F = 262/2 = 131 N
b) as the force needed is half of the block weight, the mechanical advantage is 262 / 131 = 2
c) with a mechanical advantage of 2, he would have to pull twice the distance of block motion or 2(3.00) = 6.00 m
d) W = Fd = 131 N(6.00 m) = 786 J
which is the same as the increase in potential energy of the block
e) W = mgh = 262(3.00) = 786 J