How much energy does the electron have initially in the n=4 excited state?what is the change in energy if the electron from part a now drops to the ground state?
Help please! it is winter where jenna lives. Its been snowing all day, but now the snow has changed to sleete and then to freezing rain what ia happening to cause these changes?
It is the same distance from second base to first base, and from second base to third base. The angle formed by first base, second base, and home plate has the same measure as the angle formed by third base, second base, and home plate. What can you conclude about the distance from first base to home plate, and from home plate to third base? Explain. ...?
Which of the following monitors both vertical and horizontal movements along a fault? a. seismograph b. GPS satellite system c. Richter scale d. Mercalli Scale
Study the following table. Which object will float? A. Object A B. Object B C. Object C D. Object D Download png
Magma that cools and crystallizes on Earth's surface forms A. quartz. B. marble. C. intrusive rocks. D. extrusive rocks.
The weight of passengers on a roller coaster increases by 60 % as the car goes through a dip with a 37 m radius of curvature. what is the car's speed at the bottom of the dip?
Two meteoroids are heading for earth. their speeds as they cross the moon's orbit are 1.0 km/s . part a the first meteoroid is heading straight for earth. what is its speed of impact?
In which of these samples do the molecules most likely have the least kinetic energy? solid iron at 25°C molten iron at 1600°C solid iron at 98°C iron vapor at 2900°C
If the organ pipe is cut in half, what is the new fundamental frequency? if the organ pipe is cut in half, what is the new fundamental frequency? 4f0 2f0 f0 f0/2 f0/4
Which of the following energy sources is expected to have the highest rate of consumption in 2030? a. coal b. natural gas c. nuclear d. renewable energy
A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. assume that the magnitude of the acceleration due to gravity is g. part a what is the work wd done on the skydiver, over the distance d, by the drag force of the air? express the work in terms of d, v, m, and the magnitude of the acceleration due to gravity g.
Which value is equivalent to 178 centimeters? 1.78 millimeters 17.8 millimeters 1.78 meters 1.78 × 10-2 micrometers 1.78 × 10-5 kilometers
Which of the following is a myth about water conservation? a. An important part of water conservation is preventing water pollution. b. Buying bottled water conserves more water than drinking from the tap. c. Air-drying clothes conserves more water than using an electric clothes dryer. d. A front-loading washing machine uses less water than a top-loading washing machine.
Which best compares a nondigital and a digital camera? A. A nondigital camera produces images using mirrors, and a digital camera produces them using lenses. B. A nondigital camera produces a real image, and a digital camera produces a virtual image. C. A nondigital camera uses a concave lens to capture light, and a digital camera uses a convex lens. D. A nondigital camera uses film to record images, and a digital camera uses sensors.
Which of the following is a typical product of nuclear fission? a. oxygen b. carbon dioxide c. radiation d. water
Which of the following processes most directly helps create soil from rocks? A. Weathering B. Pressure C. Melting
9. The three types of stress that act on Earth's rocks are compression, tension, and A. strain. B. shear. C. tephra. D. shale.
Darwin’s work on the theory of evolution occurred at about the same time that Harvey noticed the continuous circulation of the blood. Linnaeus developed binomial nomenclature. Mendel developed his laws of heredity. Copernicus suggested that the earth orbits the Sun.
The three ropes in the figure are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 20 N and T2 = 60 N. What are the magnitude and direction of the tension vector T3 in the third rope? Correct: Your answer is correct. N. ° (below the positive x-axis)
If the heating curve is reversed, what would best describe the boiling point? point of condensation, melting point, freezing point or sublimation point
In the history of astronomy, which of the following is true? . A] Tycho Brahe built one of the first observatories. B] Ptolemy was criticized for his work on the heliocentric model. C] Nicolaus Copernicus argued that the sun was the center of the universe. .D] Johannes Kepler argued that Earth was the center of the universe. . .
What are three mechanisms for reproductive isolation? Which Mechanism isolates two populations of similar frogs with different mating calls?
Which of the following statements are true about metallic bonds? A. Metallic bonds hold together atoms with somewhat similar electronegativities. B. Metallic bonds hold together two atoms of two different nonmetals. C. Metallic bonds exist between two atoms of the same element. D. Metallic bonds hold together a water molecule.
1. What length of time does the geologic time scale cover? a. 2.0 million years b. 4.6 billion years c. 20.5 billion years D. 10.1 million years 2. The largest expanse of time on the geologic time scale is the____. a. Eon b. Epoch c. Era d. Period 3. Which eon of the geologic time scale means "visible life"? a. Phanerozoic b. Proterozoic c. Hadean d. Archean
Which pair of undefined terms is used to define a ray? A. Line and plane B. Plane and line segment C. Point and line segment D. Point and line
A ball with a horizontal speed of 1.25 m/s rolls off a bench 1.00 m above the floor. part a how long will it take the ball to hit the floor?
New oceanic lithosphere forms as a result of a. sea-floor spreading. c. reverse polarity. b. normal polarity. d. continental drift.
In a collision, the __________ collision is when an unsecured driver strikes the inside of the vehicle.
What would be the result of an alpha particle coming into a magnetic field? A) The alpha particle will stop moving. B) The alpha particle will reverse its direction. C) The alpha particle will be deflected in a curve path. Eliminate D) The alpha particle will continue to travel in a straight line.