07/16/16

word problem
In 66 ?hours, an experienced cook prepares enough pies to supply a local? restaurant's daily order. Another cook prepares the same number of pies in 77 hours. Together with a third? cook, they... more
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07/16/16

10balls,9balls same weight and 1 ball is default weight.a balance weight machine, how find out is default ball in 3 time weighting
10balls,9balls same weight and 1 ball is default weight.a balance weight machine, how find out is default ball in 3 time weighting.
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07/15/16

Physics Parallel Question Helpp
15. A 12 V battery, an ammeter, a 5.0 A fuse (which will burn out if more than 5.0 A of current is in the circuit), and several 10.0 lamps are used in an experiment to find the effect of connecting... more
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07/15/16

how long would it take you starting at 50 miles per hour increasing 1 mile per hour every mile to make it to 500 miles
You start at 50 miles an hour and increase your speed by 1 mile per hour until you've reached 500 miles how long does it take you to get there
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07/14/16

Heat Capacity
A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The system experiences an evolution of heat and the temperature change is 55 K. Calculate q. Express your... more
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07/14/16

Bomb Calorimetry Question
A 0.65 g sample of glucose (MW = 180. g/mol) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/oC. The temperature of the calorimeter increases by 6.53oC. Calculate the molar heat... more
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07/14/16

finding enthalpy, molar enthalpy of vaporization, standard enthalpy of silicon tetrachloride, standard state of reaction
Gallium    e) After the spoon has melted, the puddle of liquid Gallium at the bottom of the coffee cup will continue to absorb energy until the Gallium and coffee reach thermal... more
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07/14/16

finding energy required to warm to melting point, temperature once it has reached its melting point, and how much energy is required to melt after its reached i
Gallium, Ga: 69.723 g/moleSolid specific heat, Csolid 0.371 J/g CEnthalpy of Fusion, 80.2 J/gmelting point temperature, Tmelt 29.76 CLiquid specific heat, Cliquid 0.371 J/g CSuppose you cast 20.0 g... more
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07/13/16

algebra word problem, a motorboat travels 135 mi....
A motorboat travels 135mi in 5 hours going upstream. It travels 195mi going downstream in the same amount of time. What is the rate of the boat in still water and what is the rate of the current?
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07/13/16

Mary is making 5 mathing pillows. She needs 120 cm of braid to trim each pillow. If the braid costs $3.98 per yard, how much will she spend to trim the pillows,
how do I solve the problem
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07/13/16

A 18 V battery in a simple circuit produces a current of 3.5 A through the circuit.
A 18 V battery in a simple circuit produces a current of 3.5 A through the circuit. How much power is being delivered by the battery?
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07/13/16

Two resistors, each having a resistance of 17 O, are connected in parallel.
Two resistors, each having a resistance of 17 Ω, are connected in parallel. What is the equivalent resistance of this combination?
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07/13/16

. What's the length of the radius of the circle?
Two chords AB and CD perpendicularly bisect each other at the point E.The length of two chords are 2a and 2b.The distance from the intersecting point to the center of the circle is c.
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07/12/16

Find (f o f ) (x)
Hi, I need to know if my answer is right.    f(x)=(3x+2)/(x-3). Find (f o f ) (x) .    I got x. 
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07/12/16

A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L. What is the amount of gas added?
Calculate the amount of moles of gas added.
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07/11/16

the air temperature is a nice 20 degrees celsius. If a ball is dropped in a well, the sound is heard 4.0s later, how deep is the well?
This is a Physics 11 word problem. Please send me the full solution. Im really stuck on this.
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07/11/16

graph of V and R
A cell of emf E having an internal resistance r is connected to an external resistance R . The potential difference V across the resistance R varies with R as shown in figure by which... more
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07/11/16

total heat produced in capacitance
In the given circuit , all the capacitor are initially uncharged . After closing the switch S1 for a long time suddenly S2 is also closed for a long time . Then show that total heat produced after... more
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07/11/16

readings in ammeter
In the given circuit the ammeter A1 and A2 are ideal and ammeter A3 has a resistance 1.9 x 10-3 . Then show that reading from ammeter are 82/27 , 34/27 & 0 respectively .    The circuit is on... more
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07/11/16

They are looking for the d.c resistance as well as the a.c resistance
A single phase 8kv, 50hz, 50cm transmission line consists of three aluminum conductors with 3cm diameter. If the 50hz of the line is 5% greater than the D.C resistance, calculate the (i) D.C... more
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07/10/16

rate at which energy is delivered in a rc circuit
A 3 mega ohm resistor and an uncharged 10^(-6) F capacitor are connected in a single loop circuit with a constant source of 4 volt . Show that at one second after the connection is made , the rate... more
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07/10/16

net emf and resistance
Find the net emf and internal resistance across AB of three batteries as shown in figure   figure is on http://i.imgur.com/Evu27EH.jpg
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07/10/16

q versus t graph
Charge q versus t graph for a capacitor initially uncharged is charged with a battery of emf 5V as shown in figure . Then show that resistance of circuit is 1.5M ohm. the graph is... more
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07/09/16

Use the exponential form of the function L = 10 log(II0) to find the intensity of a sound if its decibel reading is 40. Explain what this means.
Use the exponential form of the function L = 10 log(II0) to find the intensity of a sound if its decibel reading is 40. Explain what this means.
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07/09/16

Mechanics question please help
A particle Y of mass 2m connected to a fixed point X by a light inextensible string. It is also connected to a particle Z of mass m by a light inextensible string which passes over a light pulley... more
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