Answer:
b
Explanation:
it melts yes but it's still water [same element] so there fore it's a physical change
Answer:
force of the breaks is 6650 N, direction opposite to direction of movement
Explanation:
control is constant for given set of readings.
set indep var
observe dep var
Answer:
C. less dense than the coffee but more dense than the air above thecoffee.
Explanation:
Answer:
v_f =63 m/s
Explanation:
given,
starting force = 0 N
uniform rate increase to 36 N
time of action of Force = 35 s
mass of the body = 10 Kg
Speed of the object = ?
From the given data
if we plot F-t curve we will get a triangular shape
we know,
Impulse = Area between F-t curve
= (1/2) x base x height
= 0.5 x 35 x 36
= 630 N.s
now use Impulse-momentum theorem
Impulse = change in momentum
630 = 10 x (v_f - vi)
630 = 10 x (v_f - 0)
v_f =63 m/s
Speed of the object at 35 sec is equal to v_f =63 m/s
