1.Ce masa de solutie de concentratie 15% se obtine dizolvand 60g zahar in apa?
A. 300gr
B. 400gr
C. 200gr

2.Ce concentratie va avea solutia rezultata prin adaugarea 200g apa peste 400 g solutie de concentratie initiala 24%?

A. 16%
B. 17%
C. 20%

3.Care este volumul solutiei de acid sulfuric 0,5 M obtinuta din 49 g acid sulfuric?

A. 2L
B. 3L
C. 1L

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards