20 points and brainliest if your answer is correct!

you are designing an experiment to test the efficiency of different bikes. what simple machines to make this complex machine?

a. wedge, pulley, and wheel and axle

b. wedge, screw and wheel and axle

c. screw, inclined plane and wheel and axle

d. screw, lever, and wheel and axle

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?

Identify some abiotic characteristics of the tundra biome.