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
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
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
What is a solution that has the capacity to hold additional solute at a given temperature called? A. Unsaturated B. Saturated C. Supersaturated D. Oversaturated E. Undersaturated
The grid in a high-vacuum triode is usually kept negatively charged with respect to the cathode so that the electrons may be A. attracted to the cathode instead of the grid. B. attracted to the anode instead of the grid. C. accelerated toward the anode. D. accelerated toward the cathode. (PF QUESTION)
How can humans building a drainage system affect the water cycle? A Humans may pollute the water supplies more. B The drains would cause increased transpiration. C Water would be directed to a new location because of the drains. D The water cycle would not be impacted by a drainage system.
Choose the statements that are true about bond strength. A. Bonds formed between two atoms with a large difference in electronegativity tend to be strong. B. Strong bonds are easy to break. C. Stronger bonds release less energy when broken than weak bonds do. D. Longer bonds are weaker.
When sound waves interfere to create standing waves, the points on the medium that move up and down with the largest amplitudes are called __________?
Which of these statements describes experiences or feelings related to anxiety? a. excessive fear of objects or situations b. fear of embarrassment c. constant worry d. all of the above
13. A catapult launches a boulder with an upward velocity of 148 ft/s. The height of the boulder (h) in feet after t seconds is given by the function h = –16t² + 148t + 30. How long does it take the boulder to reach its maximum height? What is the boulder’s maximum height? Round to the nearest hundredth, if necessary. A) 9.25 s; 30 ft B) 4.63 s; 640.5 ft C) 4.63 s; 1,056.75 ft D) 4.63 s; 372.25 ft 16. Solve the equation using the Zero Product Property. (2x – 4)(2x – 1) = 0 A) 2, –1over2 B) 2, 1over2 C) –2, 2 D) –2, 1over2
A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s .part awhat is its speed when it is very far away from the earth?
What is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s? A. 5.0 J B. 6.5 J C. 10.0 J D. 12.5 J
Using the graphs below, determine which water drop rate leads to the highest seed growth. a. 90 drops/hr b. 72 drops/hr c. 50 drops/hr d. 12 drops/hrDownload png
A planet’s gravity is related to which of the following? (Points : 5) orbit weight and density surface area mass and size A? What is the removal of trees without adequate replanting? (Points : 5) bioremediation a carrying capacity deforestation a monoculture C? According to Hubble’s Law, the farther away a galaxy is, (Points : 5) the faster it is moving toward us the slower it is moving toward us the slower it is moving away from us the faster it is moving away from us C?? Electromagnetic energy can be defined as which of the following? (Points : 5) the waves of the electromagnetic spectrum energy that moves as particles at the speed of light the frequency of the emission spectrum energy that moves as a wave at the speed of light B?
Using a map for trip planning can make driving _____________. A. less stressful B. more stressful C. fuel efficient D. slower
25. Which components of the solar system are indicated by orbits 1-9? Name each component in order from the sun, and classify each according to type.
On Earth, when a body is in motion, there is always __________ to oppose the motion. a. friction. b. gravity. c. inertia. d. acceleration.
If your license says you must wear corrective lenses, you ____________________________. A. should only wear them when you feel they are needed B. may be fined if you drive without wearing them C. should always have them on when in a vehicle regardless of whether or not you are behind the wheel D. should wear them, but it isn't important because it isn’t against the law
Researchers aboard the H.M.S. Challenger discovered over 4000 new species of marine life. true or false