I. )Which unit can be used to express force? a. Nm

b. kg/s 2

c. kg • m/s 2

d. m/s

ii. )Newton’s second law of motion relates an object’s acceleration to

a. its mass.

b. its velocity.

c. the net force acting on it.

d. two of the above.

iii. )An object is accelerating when it

a. speeds up

b. slows down.

c. changes direction

d. any of the above.

iv. )Doubling the net force acting on an objecta. doubles the acceleration

b. decreases it acceleration.

c. cuts its acceleration in half.

d. does not affect its acceleration.

v. ) If you push a 20 - kilogram mass with a force of 40 N, what will be the object’s

acceleration?

a. 40 m/s2

b. 20 m/s2

c. 10 m/s2

d. 2 m/s2​

Which feature of a heating curve indicates a change ofn state

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?