Answer:
An object in either state of equilibrium must have no net force acting on it.
Explanation:
Answer:
a = -16.9 ft/s²
Explanation:
81.8 mi/hr(5280 ft/mi / 3600s/hr) = 120 ft/s
a = Δv/t = (0 - 120) / 7.1 = -16.9 ft/s²
if the initial direction is taken as the positive direction.
Answer:
Option D.) 0.09 I₀
Explanation:
The intensity, I, of a polarized light after passing through a polarizing filter is given by 
Original Intensity
Angle between the direction of polarization and the axis of filter
After passing through the first polarizer, the initial intensity, 
is halved, i.e 
After passing through the second polarizer, the angle of polarization, θ = 30⁰
After passing through the third polarizer, the angle of polarization, θ = 90⁰-30⁰ = 60⁰
Answer: The correct answer would be C. Salt crystals are hard and brittle because they are made up of atoms that combine by ionic bonding.
Explanation: All the other ones are chemical changes because a new substance is formed.
Wavelength is the length from one peak of a wave to the next, while frequency is the amount of waves present in a unit of time. The greater the wavelength the smaller the frequency. The smaller the wavelength, the bigger the frequency.
