Isotope ? -20 has an atomic mass of 20.
90.9% of all atoms of element ? are of this form.
isotope ? -21 has an atomic mass of 21.
0.3% of all atoms of element ? are of this form.
isotope ? -22 has an atomic mass of 22.
8.8% of all atoms of element ? are of this form.

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it