Drill bits are attached to power drills to make holes. drill bits are made of {blank 1} because they’re hard and resistant to corrosion. the bodies and handles of power drills are made of {blank 2} because they’re good insulators.

blank 1
-alloys
-ceramics
-composites

blank 2
-alloys
-composites
-plastics

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.