Which is the constructive interference formula for diffraction grating problems? dsinTheta =(n+(1)/(2))lambda dcosTheta =(n+(1)/(2))lambda dcosTheta =nlambda dsinTheta =nlambda

Einstein's concept of gravity involves a mass. b space. C time. d all of the above

As they move through space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other. False True

47. Referring to Figure 2.18, estimate when Vega the fifth-brightest star in our sky (excluding the Sun), will once again be the northern pole star. 48. The apparent diameter of the Moon is approximately 1/20 How long does it take the moon to move 3600? About how long does it take the Moon to move a distance equal to its own diameter across the sky (starfield)? 50. Earth has an average radius of 6,371 km. If you were standing on the Moon how much larger would Earth appear in the lunar sky than the Moon appears in our shy?

A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t)=11e^-0.014t where m(t) is measured in kilograms. (a) Find the mass at time t=0 square kg (b) How much of the mass remains after 42 days? (Round your answer to one decimal place.) square kg

What is the specific heat capacity of water? the density of the water the amount of heat required to raise the temperature of a specific mass of water the ice required to cool a mass of water by one degree Celsius the temperature of the water

When considering states of matter, which states can be found in ice cream? Aerosol Solid and Gas Liquid and Solid Liquid and Gas

Which scenario represents the weakest force? (Assume particles in all scenarios are the same distance apart.) Protons and neutrons are held together inside the nucleus. Two particles are attracted to one another by static electricity. An unstable atom breaks down releasing two radioactive particles. Two rocks of equal mass fall to the ground at the same speed.

The type of interference that comes from devices that radiate energy is known as __ electromagnetic interference conductive interference capacitive interference radio frequency interference

A 2500 kg car initially at rest rolls down a frictionless hill that is inclined at 37.2^circ If the hill is 30.0 m long what is the velocity of the car as it reaches the base of the hill? a=5.93m/s^2 v_(f)=[?]m/s

Hot Questions

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 $