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A stone thrown vertically upwards with a speed of 12m/s from the edge of Cliff 70m high. Calculate the time the stone takes to
1. 1 answer
2. 880 views
The sum of two numbers is 70. One number is 10 more than twice the other number. Using Elimination find the numbers.
1. 1 answer
2. 726 views
Two men of the same mass climb the same flight of stairs. The first man climbs the stairs for 25 seconds, while the seconds
1. 1 answer
2. 1,087 views
Five sentence paragraph. To make a perfect turkey sandwich you will need, butter knife, turkey, cheese,mayo, lettuce, tomato and
1. 4 answers
2. 925 views
A bike and cyclist have a combined mass of 75 kg. If the brakes can apply a maximum force of 20 N, what is the shortest time in
1. 1 answer
2. 909 views
-2(2x-5)(3x+1)
1. 1 answer
2. 297 views
You own 80 mp3s. You plan to add 10 more songs every month. Represent this relationship to show how many mp3s you have for th
1. 0 answers
2. 385 views
How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F-specific heat for copper
1. 0 answers
2. 518 views
How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F
1. 1 answer
2. 767 views
How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F
1. 0 answers
2. 468 views
A coal sample yields 1.25 X 10^4 Btu/lb. How many foot-pounds of work result fromburning 1.00 ton of this coal?
1. 0 answers
2. 490 views
A lifeguard swims with her head just above the water. What is the volume of the submerged part of her body if she weighs 600 N?W
1. 1 answer
2. 795 views
A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the
1. 1 answer
2. 2,223 views
Bob, who has a mass of 80kg , can throw a 550g rock with a speed of 27m/s . The distance through which his hand moves as he
1. 0 answers
2. 774 views
A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the
1. 0 answers
2. 593 views
In a hydraulic system a 20.0-N force is applied to the small piston with cross sectionalarea 25.0 cm2. What weight can be lifted
1. 4 answers
2. 854 views
In a hydraulic system a 20.0-N force is applied to the small piston with cross sectionalarea 25.0 cm2. What weight can be lifted
1. 1 answer
2. 943 views
According to Nielsen Media Research, approximately 52% of all U.S. households have digital cable television. In addition, 84% of
1. 0 answers
2. 781 views
Your friend comes across a good deal to purchase a gold ring. She asks you for advice for you to test the ring. The ring has a
1. 1 answer
2. 972 views
Suppose that 1100 j of work is done by the force 30 n in moving the suitcase a distance of 50 m. At what angle is the force
1. 1 answer
2. 6,960 views
A power wheelbarrow has a mass of 432 kg. What force must be applied to give it anacceleration of 1.75 m/s2?
1. 1 answer
2. 493 views
A relativistic proton has a momentum of 1.0×10^-17 kg ∙ m/s and a rest energy of 0.15 nJ. What is the kinetic energy ofthis
1. 0 answers
2. 892 views
Assume that a certain city consumes electrical energy at an average rate of 2.0× 10^9 W. What would be the mass changein
1. 1 answer
2. 2,055 views
What is the standard deviation of a $1 bet on any one particular number, e.g., 33, in the game ofAmerican roulette? Notice the
1. 0 answers
2. 446 views
What is the standard deviation of a $1 bet on any one particular number, e.g., 33, in the game ofAmerican roulette? Notice the
1. 0 answers
2. 509 views
Are my answers correct?Identify each energy exchange as primarily heat or work and determine weather the sign of ?E is positive
1. 0 answers
2. 1,313 views
Are my answers correct?Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive
1. 0 answers
2. 918 views
Are my answers correct?Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive
1. 0 answers
2. 1,051 views
please help me balance these equations using the method of half reactions..Na + HCL = NaCl + H2 Pb + PbO2 + H2SO4 = PbSO4 +H2O
1. 1 answer
2. 607 views
Exogenous treatment with the plant hormone, ABA or auxin, induces enhanced susceptibility against biotrophic pathogens. Design
1. 0 answers
2. 394 views
In "Paul's Case," members of the faculty don't like Paul's carnation because they thinkA. it doesn't match his other clothing.
1. 1 answer
2. 713 views
A)A model rocket is launched straight upward with an initial speed of 47.7 m/s. It accelerates with a constant upward
1. 7 answers
2. 692 views
Find four ratios equivalent to 30%
1. 3 answers
2. 422 views
2. What do you learn about Ben price's character from his actions at the end of they storya. He is a determined man who will
1. 2 answers
2. 640 views
find the area under the normal distribution curve to the right of z = -2.40
1. 1 answer
2. 388 views
find the area under the normal distribution curve between z = -1.25 and z = 2.20
1. 1 answer
2. 511 views
If a student's rank in a class of 300 students is 111, find the student's percentile rank
1. 1 answer
2. 604 views
A 153 g bullet is fired from a rifle having abarrel 0.794 m long. Assuming the origin is placed where the bullet begins to move,
1. 1 answer
2. 500 views
A 153 g bullet is fired from a rifle having abarrel 0 . 794 m long. Assuming the origin is placed where the bullet begins to
1. 5 answers
2. 734 views
According to a Louis Harris poll, 63% of male drivers always use seat belts. A recent sample of 900 male drivers showed that 60%
1. 1 answer
2. 549 views
One of the concrete pillars that supports a house is 1.9 m tall and has a radius of 0.55 m. The density of concrete is about 2.2
1. 1 answer
2. 1,527 views
which is more accurate direct weighting or weighing by difference?
1. 1 answer
2. 825 views
Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found thatM'(x)
1. 0 answers
2. 653 views
Your Porsche's gas mileage (in miles per gallon) is given as a function M(x) of speed x in miles per hour. It is found thatM'(x)
1. 3 answers
2. 2,279 views
(a) What is the hot resistance of a 24 W light bulb that runs on 120 V AC?(b) If the bulb's operating temperature is 2700°C,
1. 2 answers
2. 1,705 views
(a) What is the hot resistance of a 24 W light bulb that runs on 120 V AC?(b) If the bulb's operating temperature is 2700°C,
1. 1 answer
2. 777 views
As part of a class project you are given 0.900 g of nichrome and asked to fabricate a wire with uniform cross-section. You use
1. 0 answers
2. 1,079 views
Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740
1. 0 answers
2. 665 views
Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740
1. 0 answers
2. 1,292 views
A copper wire has a resistance of 0.425 at 20.0°C, and an iron wire has a resistance of 0.455 at the same temperature. At what
1. 3 answers
2. 6,069 views
A copper wire has a diameter of 1.532 mm. What magnitude current flows when the drift velocity is 0.500 mm/s?
1. 1 answer
2. 1,392 views
If an electron travels 0.150 m from an electron gun to a TV screen in 19.0 ns, what voltage was used to accelerate it? (Note
1. 1 answer
2. 1,126 views
If an electron travels 0.150 m from an electron gun to a TV screen in 19.0 ns, what voltage was used to accelerate it? (Note
1. 0 answers
2. 646 views
can you put in a sentence the wordsto make an offering Hapi (NIle) Osiris Wheat Growth Man Rejoice This is the only problem I
1. 1 answer
2. 478 views
What is the force on the charge located at x = +8.00 cm. q = 1.00 µC and a = 8.00? (The positive direction is to the right.)
1. 0 answers
2. 479 views
Bees often work together for the greater good of the hive. Sometimes they can get excess charge on them. Four pairs of bees,
1. 2 answers
2. 784 views
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the
1. 1 answer
2. 1,649 views
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper
1. 0 answers
2. 786 views
(a) Two point charges totaling 8.50 µC exert a repulsive force of 0.100 N on one another when separated by 0.839 m. What is the
1. 1 answer
2. 1,149 views
Two point charges exert a 2.50 N force on each other. What will the force become if the distance between them is increased by a
1. 2 answers
2. 1,003 views
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -39.0 nC?
1. 1 answer
2. 772 views
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper
1. 0 answers
2. 600 views
How many coulombs of positive charge are there in 8.70 kg of plutonium, given its atomic mass is 244 and that each plutonium
1. 1 answer
2. 690 views
How many coulombs of positive charge are there in 8.70 kg of plutonium, given its atomic mass is 244 and that each plutonium
1. 0 answers
2. 500 views
A 45.0 g ball of copper has a net charge of 1.5 µC. What fraction of the copper's electrons have been removed? (Each copper
1. 0 answers
2. 814 views
If 2.00 multiplied by 1020 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge
1. 2 answers
2. 1,072 views
Four identical metallic spheres with charges of +2.2 µC, +8.2 µC, −4.6 µC, and −9.2 µC are placed on a piece of paper.
1. 1 answer
2. 2,847 views
19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average
1. 1 answer
2. 2,562 views
An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter
1. 3 answers
2. 1,328 views
19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average
1. 1 answer
2. 465 views
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound
1. 1 answer
2. 888 views
An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter
1. 0 answers
2. 536 views
(a) By what factor is one sound more intense than another if the sound has a level 17.0 dB higher than the other?(b) If one
1. 1 answer
2. 872 views
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.800 s.(
1. 2 answers
2. 939 views
(a) By what factor is one sound more intense than another if the sound has a level 17.0 dB higher than the other?(b) If one
1. 0 answers
2. 538 views
An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter
1. 0 answers
2. 735 views
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound
1. 1 answer
2. 617 views
19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average
1. 0 answers
2. 471 views
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.800 s.(
1. 1 answer
2. 798 views
An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter
1. 0 answers
2. 634 views
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound
1. 1 answer
2. 1,102 views
19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average
1. 2 answers
2. 453 views
(a) By what factor is one sound more intense than another if the sound has a level 17.0 dB higher than the other?(b) If one
1. 1 answer
2. 1,788 views
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.800 s.(
1. 1 answer
2. 843 views
Show that 60.0 L of gasoline originally at 15.0ºC will expand to 61.1 L when it warms to 35.0ºC, how much gasoline has spilled
1. 0 answers
2. 631 views
(a) A solar collector is 12.0% efficient in gathering solar energy and converting it to heat. If the average intensity of
1. 1 answer
2. 968 views
What is the wavelength (m)of an earthquake that shakes you with a frequency of 11.5 Hz and gets to another city 85.0 km away in
1. 1 answer
2. 493 views
How many times a minute does a boat bob up and down on ocean waves that have a wavelength of 43.0 m and a propagation speed of
1. 1 answer
2. 922 views
When a pendulum with a period of 2.00000 s is moved to a new location from one where the acceleration of gravity was 9.80 m/s2,
1. 2 answers
2. 1,219 views
Two parakeets sit on a swing with their combined center of mass 15.0 cm below the pivot. At what frequency do they swing?
1. 1 answer
2. 820 views
Suppose a diving board with no one on it bounces up and down in a simple harmonic motion with a frequency of 3.00 Hz. The board
1. 1 answer
2. 2,649 views
When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its
1. 0 answers
2. 427 views
Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is
1. 1 answer
2. 675 views
(a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in
1. 0 answers
2. 464 views
(a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0°C and a cold
1. 1 answer
2. 1,776 views
When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its
1. 0 answers
2. 402 views
(a) How much heat flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching
1. 0 answers
2. 447 views
When 1.60 multiplied by 105 J of heat enters a cherry pie initially at 20.0°C, its entropy increases by 470 J/K. What is its
1. 0 answers
2. 412 views
0.460 kg mass suspended from a spring oscillates with a period of 1.50 s. How much mass must be added to change the period to
1. 1 answer
2. 848 views
A 0.810 m long brass pendulum experiences a 18.0°C temperature increase.(a) Calculate the original period(s). (b) What is the
1. 2 answers
2. 2,521 views

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