Astudent measures the gravitational acceleration g to be 9.76±0.07 m/s2. to improve his precision he spend a whole day repeating the measurement 400 times. he states the mean of the 400 measurements g 9.746 m/s2 as his best estimate of g. in the lab g has an accepted value of g- 9.80664 t0.2 m/s2 arising from a precision measurement conducted by geo-physicists in the past.

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

During spring semester at mit, residents of the parallel buildings of the east campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. a balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. assume that the stretching of the hose obeys hooke's law with a spring constant of 89.0 n/m. if the hose is stretched by 5.80 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length? unitst 3 number-1497 the tolerance is +/-5% open show work click if you would like to show work for this question:

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2