What is the porosity of the sand sample?(The sediment volume for each sample is 400ml.) a. 90.25% b. 72.00% c. 25.50% d. 16.75%
Which is a challenge that is most likely unique to urban areas? a. power outages b. shortage of water c. population density d. lack of personal time?
Which property describes an electromagnetic wave and not a mechanical wave? a. transfers energy b. travels in a vacuum c. has frequency d. requires a medium
In an ecosystem , energy that flows to tertiary consumers ultimately originates from the sun? true or false
What would the potential of a standard hydrogen electrode (s.h.e.) be under the given conditions? [h+]=0.46 mph2=1.9 atmt=298 k?
The term hierarchy refers to A. a situation in which higher species such as men will always be in control of lower species such as animals. B. a team in which everyone is equal and has to pull his or her own weight. C. a condition in which the weak must die so the strong can survive. D. a power structure in which each member knows his or her own place
The motor of a crane uses power p to lift a steel beam. by what factor must the motor's power increase to lift the beam twice as high in half the time?
The distances to nearby stars can be measured by using ____. a. absolute magnitude c. color b. temperature d. parallax
What accomplishment from the space industry benefits society? Developing a more powerful rocket booster The successful launch of communication satellites Zero-G toilets Better spacesuits
Which of the following diagrams will give an erect image when completed. arrow before 2farrow at 2f arrow between 2f and f arrow at f arrow between f and lens
Classify the following substance as diamagnetic or paramagnetic based on its magnetic properties. Drag the appropriate items to their respective bins. Download png
The bent rod is supported at a, b, and c by smooth journal bearings. the rod is subjected to the force f = 980 n . the bearings are in proper alignment and exert only force reactions on the rod. determine the components of reaction at the bearing a using scalar notation.
Which type of cloud is often taken to be a sign of fair weather? A. Cumulus B. Altostratus C. Stratus D. Nimbostratus
What increases as the temperature of a solid object rises? A. thermal energy B. potential energy C. volume D. mass
Which region of the Sun is typically about 6,000C? photosphere corona core radiative zone chromosphere convective zone
Which one of the following types of training involves 10 to 30 minutes of high-intensity exercise? A. Anaerobic B. Long, steady distance C. Medium range D. Interval
The term angle of deviation is used in reference to A. a polarizer. B. a prism. C. a lens. D. an analyzer.
Which of the following is NOT a reason why exercise routines should have clearly stated goals? a. Goals allow for time to be spent more efficiently. b. Goals can make sure individuals vary their exercises. c. Goals can keep an individual motivated. d. Goals allow individuals to track their progress against others. Specificity means an exercise program should have end goals that target specific areas. Please select the best answer from the choices ...
Road rage is an aggressive driving incident where the driver has: Been insulted. De-escalated. Lost control. Nothing to lose.
What is the first thing to check when a refrigerator stops working? a. check the food temperature. if it is 35Â°f or colder, move the food into a working refrigerator b. check the refrigerator thermometer. if it is below 51Â°f, move food into working refrigerator. c. check the food temperature. if it is 41Â°f or colder, move the food into a working refrigerator d. check the food temperature. if it is 32Â°f or colder, move the food into a working refrigerator?
Which of the following is an observation and not an inference?a.A cup with steam coming from it will be hot to the touch.b.Dark clouds in the sky will mean rain later in the afternoon.c.Bubbles form when two chemicals are mixed together.d.A plastic bag moving along the ground is being pushed by the wind.
Which of the following is not a way in which humans directly impact algal bloom production? a. industrial pollution b. wastewater discharge c. fertilizer in aquatic ecosystems d. fishing
Why does a light go out when you turn off the wall switch? A. The switch changes the direction of the flow of electrons. B. The switch causes a break in the circuit. C. The switch changes the circuit from series to parallel. D. The switch absorbs the electrical energy. would B be the correct answer?????????
Match the measurements to the correct number of significant figures A. 408.03 _1 B. 8.0 _2 C. 8.09 _3 D. 0.3 _4 E. 13.60 _5
For what purpose are goods and services produced in a socialist economy? profits their usefulness to create demand to meet all consumer needs
Velocity is the combination of which of the following? a. force & direction b. speed & direction c. gravity & direction d. speed & momentum
How much heat is required to convert 0.3 kilogram of ice at 0°C to water at the same temperature? A. 100,375 J B. 450,759 J C. 334,584 J D. 167,292 J