# Posts by Greg

Total # Posts: 493

1. ### science

The light from the Sun heats a metal surface. This is an example of A. conduction. B. radiation. C. convection. D. reflection.

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34. ### Math

john has 28 marbles and sue had 157 marbles, after each added the same amount, sue had 4 times more than john. how many did they each add?
35. ### Math

A seed company claims that 90% of its bean seeds will germinate. If seven of these seeds are planted in warm, moist, soil, what is the probability that exactly 6 of them will germinate? Round answer to nearest ten-thousandth (4 places after decimal)

Big is large
48. ### physics

An electrical device contains a transformer. Its primary coil has 200 turns, and its secondary coil has 20 turns. If the device is plugged into a 120-volt line, what is the output voltage of the device?

lol

0.5
51. ### Physical Chemistry

Im confused with the content

65. ### chemistry

I don't understand...
66. ### chemistry

How do i convert mols cacl2 to agcl
67. ### chemistry

What mass of precipitate is formed when 0.750 L of 2.50 mol/L CaCl2 reacts with 650 mL of 1.75 mol/L AgNO3
68. ### Chemistry

Find the molar concentration of 57.9 g of potassiuum chlorate dissolved in 975 mL of water my work c=nv (57.9/122.55)(975ml) and i got 460 is this correct
69. ### Math

It appears Sir John did not answer the question (nine different answers) so if everyone knew their spouse, the answers were 0, 1, 2, 3, 4, 5, 6, 7, and 8. Since there is no indication of who knew whom, Sir John's wife could be any of 0 through 8. There were 36 handshakes ...
70. ### Physics

An auditorium has dimensions 10m x 10m x 60m. How many moles of air fill this volume at STP? I'm stumped.
71. ### math

The correct answer is: Assuming both pizzas are equal diameter, thickness and weight (which is virtually impossible, but for sake of argument...) IT IS IMPOSSIBLE THAT MARTY ATE MORE PIZZA THAN LUIS. However, if Marty's pizza was LARGER than Luis's pizza by a ...
72. ### Math

do you borrow his bike for a total of 41 minutes.before lunch,he vote for one minute less than five times the number of minutes he rolled after lunch. how many minutes did you fire ride before lunch
73. ### Chemistry 111

Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 17. g of ethane is mixed with 107. g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Be sure your answer has the ...

75. ### Physics College

What is the rate of deceleration of a 1400-kg SUV that is going 75.0 km/h and then slows to 25.0 km/h in 8.20 s?
76. ### algebra

the sum of to kim and tony's ages is 42, the difference in their ages is 4 years. what are the ages of kim and tony?
77. ### Biology

Is respiratory control sensitive to small changes in arterial PO2 or in arterial PCO2?
78. ### Physics Electricity and Magnetism

A microscopic droplet of ink in an ink-jet printer is deflected onto the paper by a force of 2.34×10-4 N. If the field causing the deflection is 6.62 kN/C, what is the charge on the droplet? What equation do I use to solve and What does each value mean in the equation? ...
79. ### calculus

a small business owner buys a truck for $20,000 to transport supplies for her business. She anticipates that she will use the truck for 5 years and that the truck will be worth$10,000 in 5 years. She plans to claim a depreciation tax credit using the straight-line ...
80. ### Physics

How long will it take the voltage across the capacitor in an RC circuit to discharge 75% of its initial charged voltage if the resistor has a resistance of 450 kilo-Ohms and the capacitor has a capacitance of 49 micro-farads? How do I solve this problem? Thanks!
81. ### Math

When you use a coupon for 15 percent off the original price of a headset, you pay \$27. What is the original price of the headset? Please use an equation.
82. ### Chemistry

Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g). Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.) A) 310K B) 1070K C) 1470K ...
83. ### math

A truck has 5.9L engine in it. 5.9L of the overall displacement in 6 cylinders each 102mm bore (diameter) and 120mm stroke (length). Engine operates at 16.3:1 compression ratio and with 6psi (0.41atm) of boost cruising at 1600rpm. What is the volume of ONE cylinder? Then add 6...
84. ### Chemistry

Having trouble with this question on my homework =/ 200mL of 0.5M H2SO4 is combined with 500mL of 0.1M NaHCO3. List the physical states of all products, give molarity of aqueous ions and grams of gases and solids. Thanks alot guys!! Any help is awesome
85. ### Chemistry

Calculate empirical formula C=41.7%,H=6.2%,N=19.3%, and O=33.1% Thanks. any help at all will be awesome!
86. ### Math Accounting

Determine the proposal’s appropriateness and economic viability. For all scenarios, assume spending occurs on the first day of each year and benefits or savings occurs on the last day. Assume the discount rate or weighted average cost of capital is 10%. Ignore taxes and ...
87. ### math

In right triangle, the side opposite to right angle is called what? ANSWER FAST PLZ!!! THX
88. ### alg 2

1670 YAAAAAAAAAAAAAAAAAAAAAAAAAAAAY I GOT IT
89. ### TRIG help quickly please

Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you π/8 -7π/4 15π/4 3π/4

1. Jim is doing a physics experiment on the rate of cooling of solid objects in air. Which of the following is a variable that is not directly part of his experiment, but should be controlled in his experiment? (Points : 1) initial temperature to which he heats the solid ...
91. ### Check Answers Quick -Physics

What causes the centripetal acceleration of an electron in a hydrogen atom? electrical attraction gravity friction <-- tension Question 2. Which of the following terms might a jet pilot use to describe a force that presses him against his seat during a high-speed turn? ...
92. ### pyhsis

It is spelled physic

Potatoes are good
94. ### A/P Biology

The Echinopsis mamillosa is a flowering cactus native to Bolivia. A high-rise building is built near a particular Echinopsis, filtering the amount of direct sunlight it receives. Which of the following processes is negatively affected first by the reduction in sunlight? ...

Type the missing number. -25 -23 -22 -21

4
97. ### math - calc

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
98. ### math - calc

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
99. ### chemistry science

substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of water and PNPP stock ...
100. ### biochemistry

substrate concentration= 3.5mM (c2) buffer=0.4 ml 10mM PNPP stock= ?ml (V1) water=?ml enzyme= 0.2ml total volume =1ml (V2) I need help with a dilution, I understand that you would be using c1v1=c2v2 but im confused as to what we need to find the amount of water and PNPP stock ...
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