4. What are the basic scientific principles the engineers who designed the digital scales would have needed to understand to design this tool? Circle the correct answer(s).
A. electric currents
B. physical properties of metals
C. influence of gravitational force on objects
D. physical and chemical properties of materials used in building circuits
Houghton Mifflin Harcourt

Which of the following represents a virtual image?

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?

The speed of light can be used to measure the