Sunday

April 20, 2014

April 20, 2014

Total # Posts: 21

**Algebra**

Write the equation of the line containing the given point and parallel to the given line. The equation of the line is y= Express your answer in the form y=mx+b. (-8,9); 2x=9y+4

**Algebra**

Write the equation of the line containing the given point and parallel to the given line. The equation of the line is y= Express your answer in the form y=mx+b. (7,8); x+7y=6 Express your answer in the form y=mx+b. (8,9); 5x+y=9 Express your answer in the form y=mx+b. (2,-6); ...

**physics**

Two very large parallel sheets are 5.00 cm apart. Sheet A carries a uniform surface charge density of -9.00 microcoulombs per meter squared, and sheet B, which is to the right of A, carries a uniform charge of -11.6 microcoulombs per meter squared. Assume the sheets are large ...

**physics-PLEASE ANSWER, it's due today!**

One end of a copper rod is immersed in boiling water at 100 degrees celsius and the other end in an ice-water mixture at 0 degrees celsius. The sides of the rod are insulated. After steady-state conditions have been achieved in the rod, 0.180 kg of ice melts in a certain time ...

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

oh, never mind, I got it, I was using the wrong value for the constant, thanks!

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

I did that but the website that I do the homework on says my answer is wrong. Here are the numbers I plugged in: (1.9 )(5.67*10^8)((31+273)^4 - (19+273)^4) and I get the answer is 1.37*10^18 but it says that's wrong

**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...

**Physics**

If you have angular velocity and you need angular displacement, just remember: velocity=displacement/time so solve that for displacement and it's displacement=velocity*time so it should be angular displacement=(197 rad/s)(2.5 s) and your answer should be 492.5 rad, be care...

**physics**

To find the resultant, separate each of the vectors into x and y components so it should be: v1: 15x + 0y v2: 0x + 25 y add those together and the resultant vector is: resultant vector: 15x + 25y to get the magnitude, you do the square root of the x-comp squared plus the y-com...

**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...

**Physics-PLEASE ANSWER, it's due soon!**

I'm putting in the answer I get but the website that I do the homework on says the answer is wrong. I'm getting 94.77 K for final temperature, but it says that's wrong. What should I do?

**Physics-PLEASE ANSWER, it's due soon!**

A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final temperature of the...

**physics**

A copper calorimeter can with mass 0.202 kg contains 0.185 kg of water and 1.40×10^−2 kg of ice in thermal equilibrium at atmospheric pressure. If 0.900 kg of lead at a temperature of 417 degrees celsius is dropped into the can, what is the final temperature of the...

**physics**

An 8.56 kg block of ice at 0 degrees celsius is sliding on a rough horizontal icehouse floor (also at 0 degrees celsius) at 15.6 m/s. Assume that half of any heat generated goes into the floor and the rest goes into the ice. How much ice (in kg) has melted after the speed of t...

**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 rest...

**physics**

I wasn't given the thermal conductivity of the fur layer, all the info the problem gives is included above...

**physics**

Animals in cold climates often depend on two layers of insulation: a layer of body fat [of thermal conductivity 0.200 W/mK] surrounded by a layer of air trapped inside fur or down. We can model a black bear (Ursus americanus) as a sphere 1.50 m in diameter having a layer of fa...

**physics**

Water flows steadily from an open tank into a pipe. The elevation of the top of the tank is 10.2 m, and the elevation at the pipe is 3.90 m. The initial cross-sectional area of the pipe is 6.40×10^−2 m; and at where the water is discharged from the pipe, it is 2.30...

**physics**

What is the amount of heat entering your skin when it receives the heat released by 26.4 g of steam initially at 100 degrees celsius that cools to 34.3 degrees celsius?

**physics**

A small 5.00 kg brick is released from rest 3.00 m above a horizontal seesaw on a fulcrum at its center, with a radius of 1.60 m. Find the angular momentum of this brick about a horizontal axis through the fulcrum and perpendicular to the plane of the figure the instant the br...

**calculus**

find the solution of the differential equation dy/dt = ky, k a constant, that satisfies the given conditions: y(0)=50, y(5)=100 please show steps. INtegrate dy/dt I think the answer will be in the form of y=e^kt + C check that and see if it works. You should be memorizing your...

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