Which of these experiments would make use of qualitative data?

a study on the effects of sunlight on the growth rate of plants

a study of different surfaces to compare ability to repel water

a study on the change in freezing point of water when salt is added

a study of different shapes to compare rolling friction values

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?