Sunday

July 24, 2016
Number of results: 113,344

**Physics**

While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 61-kg person develops a power of 75 W during a race, how fast is the person running?
*October 12, 2013 by Anonymous*

**physics - runner**

While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 60 kg person develops a power of 78 W during a race, how fast is the person running? (Assume a running step is 1.5 m long.)
*June 4, 2010 by lau*

**Physics 111**

While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass. If a 62 kg person develops a power of 67 W during a race, how fast is the person running? (Assume a running step is 1.5 m long.)
*October 14, 2010 by Blake *

**Physics**

While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 Watts during a race, how fast is the person running? Assume a running step is 1.5 m long.
*July 9, 2010 by Deanna*

**PHYSICS!!**

(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...
*April 11, 2016 by tom*

**PHYSICS HELP!!**

(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...
*April 11, 2016 by Ben*

**Physics**

A person consumes 2500 kcal/day while expanding 3500 kcal/day. In a months' time, about how much weight would this person lose if the loss were essentially all from body fat? (Body fat has an energy content of about 4100 kcal per pound).
*November 19, 2012 by T*

**Physics- LOST!**

If the air temperature is the same as the temperature of your skin (about 30.0 C), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, a typical 70.0 kg person's body produces ...
*December 3, 2007 by Jamie*

**Science**

A 55 kilogram person and a 65 kilogram person climb 8 meters up a flight of stairs in 10 seconds. Compare power used by each person
*March 3, 2016 by abdul*

**physics**

The figure below shows the speed of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 73.4 kg. Determine the force exerted by the chin-up bar on his body at the following times. t=0s, speed= 0cm per second; t= .5s, speed= ...
*October 10, 2010 by Amber*

**PHYSICS**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 117-km race in which his average ...
*February 24, 2011 by Tiffany*

**physics**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 123-km race in which his average ...
*February 28, 2011 by heather*

**Physics**

In the Biomedical and Physical Sciences building at MSU there are 135 steps from the ground floor to the sixth floor. Each step is 16.0 cm tall. It takes 5 minutes and 40 seconds for a person with a mass of 63.9 kg to walk all the way up. How much work did the person do? What ...
*April 19, 2016 by Kevin*

**Physics**

In the Biomedical and Physical Sciences building at MSU there are 135 steps from the ground floor to the sixth floor. Each step is 16.0 cm tall. It takes 5 minutes and 40 seconds for a person with a mass of 63.9 kg to walk all the way up. How much work did the person do? What ...
*April 19, 2016 by Kevin*

**chemistry**

a resting person requires 14.5 L of O2 per hour to maintain metabolic activities. Such a person breathes in 0.50 L of air at approximately 20 degrees C with each breath. The inhaled air is 20.9%O2 while the exhaled air is 16.3% O2. (a) how many breaths per minute does a ...
*November 19, 2009 by Joe*

**Math**

At the airport, Person A and Person B are walking at the same speed to catch their flight, but Person B decides to step onto the moving sidewalk, while Person A continues to walk on the stationary sidewalk. If the sidewalk moves at 1 meter per ...
*March 13, 2016 by Anonymous*

**Physics**

Bicyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by seven-time-winner Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass. (a) How much work does he do during a 145-km race in ...
*October 20, 2012 by Elizabeth*

**AP Physics - Linear Momentum**

During a Chicago storm, winds can whip horizontally at speeds of 100 km/h. If the air strikes a person at the rate of 40 kg/s per square meter and is brought to rest, estimate the force of the wind on a person. Assume the person is 1.50m high and 0.50m wide. Compare to the ...
*October 16, 2009 by Henry*

**statistics**

Burning fuels in power plants or motor vehicles emit carbon dioxide, which contributes to global warming. Table 1.3 displays CO2 emissions per person from countries with populations of at least 20 mil. Why do you think we choose to measure emissions per person rather than CO2 ...
*January 10, 2010 by Kelly*

**communication**

Social science research indicates which one of the following sequences of events? Person achieves goal >person develops self-esteem > person establishes goal > person pursues goal Person pursues goal > person establishes goal > person develops self-esteem > ...
*June 28, 2010 by ros*

**physics**

which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram
*November 25, 2011 by sahar*

**physics**

which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram
*November 25, 2011 by sahar*

**physics**

The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this person could radiate per second into a room at...
*December 6, 2009 by AE*

**Physics**

A 60.0 kg runner expends 355 W of power while running a marathon. Assuming that 8.00% of the energy is delivered to the muscle tissue and that the excess energy is primarily removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per ...
*May 1, 2010 by Kelsey*

**physics, PLEASE ANSWER, I really need help!**

The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this person could radiate per second into a room at...
*December 6, 2009 by AE*

**physics**

A 74.0kg person is put on an exercise program by a physical therapist, the goal being to burn up 550 food calories in each daily session. Recall that human muscles are about 21.0% in converting the energy they use up into mechanical energy. The exercise program consists of a ...
*October 4, 2014 by dia*

**Physics**

If the air temperature is the same as the temperature of your skin (about 30.0 oC), your body cannot get rid of heat by transferring it to the air. In that case, it gets rid of the heat by evaporating water (sweat). During bicycling, a typical 70.0kg person's body produces ...
*March 14, 2016 by Desperate Student*

**math**

cellular phone companies. 1. with this plan each person is charged $19.95 per month and $0.31 per minute 2. with this plan each person is charged $40.95 per month and $0.16 per min 3. with this plan each person is charged $80.95 per month with unlimited minutes....define the ...
*September 29, 2013 by louise*

**Chemistry**

There is a patient whose height is 5ft. 4 inches and weight is about 165 lbs. This person needs to have 0.8 mg of medication per kg body weight. How much of medication should this person have? First convert the pounds to kilograms. There are approximately 2.2 pounds per ...
*December 6, 2006 by Allie*

**Engineering Economics**

Sales of bottled water in the U.S totaled 16.3 gallons per person in 2004. Water costs .40 cents per bottle.A municipal company provides tap water for $2.10 per 1000 gallons. If the average person drinks two bottles of water per day or uses 5 gallons per day in getting that ...
*October 10, 2011 by Margie*

**Physic**

A person weighs 872 N in air and has a body fat percentage of 20.7%. a. What is the overall density of this person's body? b. What is the volume of this person's body? c. Find the apparent weight of this person when completely submerged in water.
*April 18, 2010 by Ann*

**physics**

A resting person requires 14.5 L of oxygen per hour to maintain metabolic activities. Such a person breathes in 0.480 L of air at approximately 25.0 degrees celsius with each breath. The inhaled air is 20.9% while the exhaled air is 16.3%. How many oxygen molecules does a ...
*December 3, 2009 by AE*

**algebra**

A store mixes kenyan coffee worht $12 per kilogram and turkish coffee worth $16 per kilogram the mixture is to sell for $14 per kilogram how much of each should be used to make a 348-kilogram mixture?
*March 18, 2013 by ana*

**math**

A store mixes Brazilian coffee worth $11 per Kilogram, Turkish coffee worth $13 per kilogram. The mixture is to sell for $12 per kilogram. Can you help me find how much of each should be used to make a 564- Kilogram of both mixtures please and thank you.
*December 8, 2011 by Mandy*

**physics please help**

How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical energy in the ...
*June 11, 2012 by Nasir*

**maths**

The ‘body mass index’ is used to find the body weight that is appropriate for a person’s height. It is calculated using the formula. I = W (I = W divided by H squared) H 2 Where I is the body mass, W is the person’s weight in kg, and H is the person’s height in metres. If the ...
*May 12, 2007 by katie*

**physics**

a person pushes a box across a horizontal surface at a constant speed of .5 meter per second. the box has a mass of 40 kg and the coefficient of sliding friction is .25. The power supplied to the boxx by the person is... please Explain!!
*January 30, 2009 by hana*

**Phsyics Plz Help**

How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical energy in the ...
*June 11, 2012 by Nasir*

**Algebra**

The formula to compute a person's body mass index is B=703*w/h2 B represents the body mass index, w is the person's weight in pounds and h represents the person's height in inches. I need to: a. solve the formula for w. b. What is the weight to the nearest pound of a person ...
*October 14, 2009 by Tyler*

**physics**

a person 0f mass m = 60 kg walks along the radius from the periphery to the center of a circular platform of moment of inertia= 200kgm square and radius r = 3m. the disk is a rotating frictionless with angular velocity= 0.3 rad\s.find the angular velocity of the system when ...
*May 1, 2012 by John*

**Algebra**

Two varieties of herbal tea, one cost $4.00 per kilogram other cost $5.00 per kilogram. How many kilograms of each type are needed to make 20kg of a blend worth $4.60 per kilogram?
*May 24, 2010 by TinaG*

**Algebra**

Two kinds of nuts, one cost $5.00 per kilogram another cost $5.40 per kilogram. How many kilograms of each type of nut should be mixed in order to have 40 kg of a mixture worth $5.25 per kilogram?
*May 24, 2010 by TinaG*

**12th grade calculus**

your operate a tour service that offers the following rate: $200 per person if 50 people (the minimum number to book the tour) go on the tour for each additional person, up to a maximum of 80 people total, the rate per person is reduced by $2 it cost $6000 (a fixed cost) plus...
*November 18, 2008 by dt*

**math**

A store mixes Kenyan Coffee worth $11 per Kilogram and venezuelan coffee worth $14 per Kilogram. The mixture is to sell for $12 per kilogram. Find out how much of each should be used to make a 396-Kilogram Mixture
*September 27, 2011 by Catherine*

**Math**

A store mixes Brazilian coffee worth $10 per kilogram and Turkish coffee worth $12 per kilogram. The mixture is to sell for $11 per kilogram. Find out how much of each should be used to make a 216 kilogram mixture.
*October 6, 2012 by Curt*

**Physics**

A person's body is producing energy internally due to metabolic processes. If the body loses more energy than metabolic processes are generating, its temperature will drop. If the drop is severe, it can be life-threatening. Suppose a person is unclothed and energy is being ...
*December 7, 2012 by Confused*

**Physics 11th grade**

Squaw Valley ski area in California claims that its lifts can move 48700 people per hour. If the average lift carries people about 185 m (vertically) higher, estimate the maximum total power needed. (Assume an average mass per person of 70 kg.)
*February 13, 2010 by Luricela*

**physics**

S.O.S!!! In terms of saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 15.0 mi/h, a cyclist uses food energy at a rate of about 400 kcal/h above what he would use if he were merely ...
*September 27, 2010 by Frankie *

**physic problem-thermoregulation**

During a dry day, a 70.0 kg athlete runs a marathon while the outside temperature is T2 = 33.2 ¢XC. The thermal power produced by the athlete's body is P = 1.05 ¡Ñ 103 W and the skin temperature is T3 = 35.5 ¢XC so that the themal exchange due to convection, radiation and ...
*May 1, 2010 by Hannah*

**math**

average cost for traning is $200 per hour per person 60 person is employs and scheduled for 25hours per year. how much would it cost
*October 13, 2014 by milton*

**science**

A sedentary person requires about 6 million J of energy per day. This rate of energy consumption is equivalent to about how many W?
*February 17, 2008 by janeen*

**maths**

The ‘body mass index’ is used to find the body weight that is appropriate for a person’s height. It is calculated using the formula. I = W/H^2 Where I is the body mass, W is the person’s weight in kg, and H is the person’s height in metres. Use the formula to find the body ...
*May 9, 2007 by katie*

**Rohan Khan**

A person with body resistance between his hands of 10KÙ accidently grasps the terminal of a 14-KV power supply. (a) If the internal resistance of the power supply is 2000Ù, what is the current through the person’s body? (b) What is the power dissipated in his body? (c) If the ...
*June 10, 2011 by Rohan Khan*

**physics**

A person's body is producing energy internally due to metabolic processes. If the body loses more energy than metabolic processes are generating, its temperature will drop. If the drop is severe, it can be life-threatening. Suppose a person is unclothed and energy is being ...
*April 18, 2012 by anonymous *

**Physics**

Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2430 kJ/kg at body temperature, and the body can produce as much as 1.3 kg of sweat per hour. If sweating were the only heat dissipation mechanism, what would be ...
*December 2, 2011 by Allie*

**science**

The market value in current dollars of all goods and services produced within a country for final use during a year is the a. gross national product. b. gross world product. c. per capital GNP. d. per capita GDP. e. gross domestic product. Developed countries a. are highly ...
*September 3, 2013 by Esa*

**AP Physics**

Hi im new so maybe one of you can help me understand this question, can't find it anywhere in the book. A person weighs 723N in air and has a body-fat percentage of 29.3% . What is the overall density of this person's body? What is the volume of this person's body? Find the ...
*December 3, 2009 by Danny*

**Physics**

Hi im new so maybe one of you can help me understand this question, can't find it anywhere in the book. A person weighs 723N in air and has a body-fat percentage of 29.3% . What is the overall density of this person's body? What is the volume of this person's body? Find the ...
*December 3, 2009 by Danny*

**Math**

A candy store currently sells almonds for $8.50 per kilogram and peanuts for $4.50 per kilogram. It wants to create 20 kilograms of mixed nuts that will equivalently sell for $5.30 per kilogram. How many kilograms of almonds should they use?
*May 6, 2013 by Bob*

**math**

A candy store currently sells almonds for $8.50 per kilogram and peanuts for $4.50 per kilogram. It wants to create 20 kilograms of mixed nuts that will equivalently sell for $5.30 per kilogram. How many kilograms of almonds should they use?
*May 6, 2013 by Narendra *

**Physics**

(a) CO2 emissions C from a nation’s energy system can be expressed as: C = Population x Energy consumption per person x CO2 emissions per unit of energy consumption. Initially, total emissions are 600 million tonnes of CO2 per year. If, over a 50-year period, population ...
*August 2, 2010 by Raven*

**PHYSICS**

During an X-ray examination, a person is exposed to radiation at a rate of 3.17×10-5 grays per second. The exposure time is 0.170 s, and the mass of the exposed tissue is 1.24 kg. Determine the energy absorbed.
*April 14, 2016 by Kassia*

**Math**

A certain travel agency offered a tourthat will cost each person P 1500.00 if not more than 150 persons will join,however the cost per person will be reduced by P 5.00 per person in excessof 150. what will be the maximum profit?
*May 18, 2016 by Gab*

**Economics**

A person is willing to pay $50 per visit for physical therapy, but she pays $35 per visit. This person receives a consumer surplus of $85 per visit. Is this true or false/
*September 14, 2012 by Marie*

**chemistry**

A 43 kg person drinks 490 g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by ...
*September 26, 2008 by jamie*

**chemistry**

A 51 kg person drinks 330. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 18% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by ...
*September 18, 2011 by Ellie*

**chemistry**

A 51 kg person drinks 270. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 15% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by ...
*September 19, 2011 by Anonymous*

**science**

A 49 kg person drinks 270. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in ascending is given by...
*September 14, 2012 by Alyssa*

**Economics**

A person is willing to pay $50 per visit for physical therapy, but she pays $35 per visit. This person receives a consumer surplus of $85 per visit.
*September 22, 2013 by Anonymous*

**college algebra**

store mixes a Brazilian coffee worth worth $10 per kilogram and a turkish coffee worth $13 per kilogram. The mixture is to sell for $12 per kilogram. Find out how much of each should be used to make a 420-kilogram mixture. my calculations all came out super wrong
*August 22, 2014 by college*

**physics**

If a person radiates about 74 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 235 Calorie doughnut?
*November 22, 2008 by beth*

**Calculus**

A travel agency currently has 80plp signed up a tour. The price of a ticket is $5000 per person. The agency has chatered a plane seating 150 plp at a cost of $250000. Additional costs to the agency are incidental fees of $300 per person. For each $30 that the price is loverwd...
*June 19, 2010 by Adeola*

**Physics 11**

Two people start running from rest. The first person has a mass of 59 kg and is wearing dress shoes with a coefficient of static friction of 0.52. The other person is wearing running shoes with a coefficient of static friction of 0.66. Explain why we do not really need the ...
*March 31, 2013 by Anonymous*

**Physics**

Biomedical measurements show that the arms and hands together typically make up 13.0% of a person's mass, while the legs and feet together account for 37.0% . For a rough (but reasonable) calculation, we can model the arms and legs as thin uniform bars pivoting about the ...
*February 23, 2012 by john*

**OOP(netbeans)**

Write a program that accepts a person’s weight and displays the number of calories the person needs in one day. A person needs 19 calories per pound of body weight, so the formula expressed in Java is Calories = bodyweight * 19;
*March 9, 2013 by kchik*

**Algebra**

It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c cigarettes per day for...
*August 25, 2010 by Kendra*

**Algebra Help**

It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c cigarettes per day ...
*August 25, 2010 by Kendra*

**Physics help please!!!**

Biomedical measurements show that the arms and hands together typically make up 13.0% of a person's mass, while the legs and feet together account for 37.0% . For a rough (but reasonable) calculation, we can model the arms and legs as thin uniform bars pivoting about the ...
*February 23, 2012 by john*

**Physics**

A person is standing outdoors in the shade where the temperature is 22 °C. (a) What is the radiant energy absorbed per second by his head when it is covered with hair? The surface area of the hair (assumed to be flat) is 180 cm2 and its emissivity is 0.84. (b) What would be ...
*April 30, 2013 by Tim*

**Chem**

if a person inhales 0.1 mol air per breath, and the pressure is 92kpa and body temp is 37 degrees celcius what is the maximum volume of air this person can inhale
*November 26, 2014 by Anonymous*

**physics**

Running at 2.0 m/s a 45.0 kg person collides with a 90.0 kg person who is traveling at 7.0 m/s in the other direction. Upon collision, the 90 kg person continues to travel forward at 1.0 m/s. How fast is the 45 kg person knocked backwards?
*November 29, 2011 by Jane*

**chemistry**

The typical person needs a 2000 calorie diet to sustain “normal” activity. Nowadays, a lot of the energy in American diet comes from fats and sugars. Assume that “fats” provide 9.0 calories per gram and sugars (treat as glucose) provide 4.5 calories per gram. If your “typical...
*September 13, 2014 by Ashley*

**algebra 2**

A drama club is planning a bus trip to new york city to see a broadway play. the cost per person for the bus renatl varies inversely as the number of people going on the trip. It will cost $30 per person if 44 people go on the trip. How much will it cost per person if 20 ...
*May 19, 2014 by Amy*

**Math**

A theatre company allows a group of 10 people to buy theatre tickets at a price of $28 per person. For each person in excess of 10, the price is decreased by $2 per person for everyone down to a minimum of $10 per person. What number of people will produce the maximum revenue ...
*October 17, 2014 by Mathgirl730*

**PHYSÝCS**

Suppose a person metabolizes 2150 kcal/day. a) With a core body temperature of 37.1°C and an ambient temperature of 21.3°C, what is the maximum (Carnot) efficiency with which the person can perform work? b) If the person could work with that efficiency, at what rate, in watts...
*January 6, 2012 by melisa*

**physics**

Suppose a person metabolizes 2250 kcal/day. a) With a core body temperature of 36.9°C and an ambient temperature of 21.5°C, what is the maximum (Carnot) efficiency with which the person can perform work? b) If the person could work with that efficiency, at what rate, in watts...
*December 18, 2012 by helena*

**physics**

A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.596 rev/s. A 59.4 kg person running tangential to the rim of the merry-go-round at 3.68 m/s jumps onto its rim and holds on. Before jumping on the merry-go-round, the person...
*June 6, 2007 by PHYChica*

**Physics**

A children merry go round in the consist of 300 kg solid horizontal disk of radius 8.5 m. It rotates at a speed of .25 revolution per second while a person of mass 150 km takes a ride at the edge of the disk. How fast will the disk be rotating if the person walks 4m along the ...
*December 14, 2013 by Tsunayoshi*

**physics**

A person of mass 60 kg is standing on a raft of mass 40kg in a lake. The distance of a person from bank is 30m. If a person starts running towards bank with velocity 10m/s then his distance from bank after 1s will be ?? And explain with diagram and proper steps
*September 16, 2014 by saira*

**reading/english**

Carbohydrates are various combinations of sugar units, or saccharides, and are the major energy source for the body. Each gram of carbohydrate contains four calories. The average person requires approximately 2,000 calories per day. Since about 60 % of our calories come from ...
*September 30, 2009 by jerson*

**math**

it is estimated that in an average lifetime a person watches about 105,000 hours of TV. at this rate, about how many hours per day does a person watch TV?
*June 6, 2012 by Celest*

**PHYSICS (HELP)**

A playground merry-go-round has a radius of R= 2 m and has a moment of inertia Icm= 9×103kg⋅m2 about a vertical axis passing through the center of mass. There is negligible friction about this axis. Two children each of mass m= 20kg are standing on opposite sides at a ...
*November 9, 2013 by Anonymous*

**physics**

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...
*January 15, 2015 by Daniel*

**math**

The price per person of renting a boat varies inversely with the number of people renting the boat. It costs $20 per person if 27 people rent the boat. How much will it cost per person if 95 people rent the boat?
*May 11, 2011 by Anonymous*

**Algebra**

A store mixes Kenyan coffee worth $11 per kilogram and Turkish coffee worth $13 per kilogram. The mixture is to sell for $12 per kilogram. Find how much of each should be used to make a 348-kilogram mixture. How many kilograms of the Kenyan coffee should be in the mixture?
*March 5, 2013 by Chuck*

**Physics Classical Mechanics**

A playground merry-go-round has a radius of R= 2 m and has a moment of inertia Icm= 9×103kg⋅m2 about a vertical axis passing through the center of mass. There is negligible friction about this axis. Two children each of mass m= 30kg are standing on opposite sides at a ...
*November 7, 2013 by A*

**Physics**

Suppose the skin temperature of a naked person is 34°C when the person is standing inside a room whose temperature is 25°C. The skin area of the individual is 2.0 m2 a) Assuming the emissivity is 0.80, find the net loss of radiant power from the body b) Determine the number of...
*April 18, 2007 by papito Urgent help needed*

**Physics**

A person reaches a maximum height of 65cm when jumping straight up from a crouched position. During the jump itself, the person's body from the knees up rises a distance of around 50cm . To keep the calculations simple and yet get a reasonable result, assume that the entire ...
*October 1, 2014 by Ash*

**science**

The total power output of the Sun is about 3.8 × 1026 W, and the power-producing core has a radius of about 1.4 × 105 km (about 20% of the full radius of the Sun). Using these figures and your knowledge of the energy release in the proton– proton chain estimate the power ...
*August 24, 2011 by mj*

**finite math **

Candy costing 1.25 per kilogram was mixed with candy costing 1.65 per kilogram to produce 10 kilograms of a candy mixture worth 1.40 per kilogram. find how may kilograms of each was used.
*September 28, 2010 by remina *