The shortest wavelength of visible light is violet light. True False
The colors you see during a sunset are caused by __ the absorption of light by the atmosphere the reflection of light by the atmosphere the refraction of light by the atmosphere
When experimenting with pucks on an air track you find that momentum is conserved for elastic collisions. inelastic collisions. both of these none of the above
Which of the following longitudinal waves has the greatest energy? amplitude=6cm;wavelength=4cm;period=10seconds amplitude=10cm ; wavelength =6 cm; period =4 seconds amplitude=4cm;wavelength=10cm;period=6seconds
Two charges with magnitude Q experience a force F when held a distance r apart. What is the force between two charges of magnitude 2Q held a distance 2r apart? F/2 4F F/4 F 16F
Multiple Select Question Select all that apply When waves travel through a medium, which of the following have a net displacement? A longitudinal wave A transverse wave A wave pulse The medium itself
The stars within a constellation do not stay in fixed positions relative to each other during human lifetimes. A ) True B False
Eclipses happen many times each year. A True B False
How does physics benefit our daily lives? Physicists map moon patterns to provide data on crop growth cycles. Physicists study ailments such as kidney disease and arthritis. Physicists study agriculture. Robotics and lasers are used in medicine and industry.
In what way does the similarities and differences contradict or support previous accounts of atom models?
You are-tonsidering whether to buy a house for $\$ 80,000$ or another identical house located near high-voltage electric power lines, for $\$ 70,000$ Assume that it has been established that living near high-voltage lines increases the risk of cancer due to electromagnetic fields (EMFs). True or False: If you choose the $\$ 70,000$ house, the radiation from EMFs is not an externality. True X False
Question 1 Light travels faster in: 1. warm air 2. cool air 3. a vacuum. Question 2 When white light goes from air into water,the color that refracts the most is: 1. red 2. orange 3. green 4. violet 5. all refract the same amount. Explain.
What is the maximum number of electrons that the $7^{th}$ energy level can accomodate? 8 32 49 98
A piece of chocolate melts in your mouth This is an example of heat conduction. heat convection. heat radiation. thermal expansion. none of the above.
Question 4 Which of the following objects would require the use of a small-scale model? An atom The planet Saturn The highway system in Florida The path of an ocean current
Of an initial amount of 1000 g of lead-210, how much will remain in 160 years?Lead-210 decays at a rate of $3.15\% /yr$ $\square $ g (Round to one decimal place as needed.)
Which symbol represents a gamma ray? A. $\alpha $ B. $\gamma $ C. $\beta ^{-}$ D. $\beta ^{+}$
Select the correct answer. Which of Newton's laws states that "every action has an equal and opposite reaction"? A. first B. third C. second D. fourth
Refraction results from changes in light's speed. all of the above incident angles. frequency.
Essay: In your own words, explain why a simple pendulum's period does not depend on the mass on the end of the pendulum. $\square $
