01/31/16

using f(x)=1/sqrtx, find a tangent line that is parallel to x+2y+6=0
I can get most of the way through this problem.  I know the tangent line is y=-1/2x+3/2.  I know it intersects the function at (1, 1).  I get stuck when trying to prove it.  using the... more
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01/30/16

A man expends 100J of work to move a box up an inclined plane. The amount of work produced is 80 J. What is the efficiency?
Efficiency in Physical Science
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01/29/16

A 180kg load is moved 23m vertically with an accelaration..
A 180kg load is moved 23m vertically with an acceleration a=0.150g by a single cable.Determine:a. the tension in the cableb. the net work done on the loadc. the work done by the cable on the loadd.... more
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01/27/16

What is her acceleration on the rough ice?
A speed skater moving across frictionless ice at 5.0m/s hits a 3.0-m-wide patch of rough ice, she slows steadily, then continues on at 3.7m/s. What is her acceleration on the rough ice? Use 2... more
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01/25/16

Using slove if equations
A sporting goods store sells right handed and left handed baseball gloves. In one month 12 gloves were sold for a total of revenue of $561. Right handed gloves cost $45 and left handed gloves cost... more
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01/25/16

Solve below:
6x+3≥-1 or 6x+13≤5
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01/20/16

A diver running 1.0 m/s dives out horizontally from the edge of a vertical cliff and 2.8 s later reaches the water below. How high was the cliff?
Don't understand how to do this problem
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01/20/16

Can an object have an unbalanced force and have a velocity of zero?...
Can an object have an unbalanced force and have a velocity of zero? Explain.
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01/19/16

Can you have two different velocities at the same time?
Δt=0 {change in time is 0vf≠vi {there are two different velocities (final velocity does not equal initial velocity)What I'm saying is this: if no time has passed, can your final and initial... more
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01/19/16

To slide a metal puck across a greased sheet of metal at constant speed....
To slide a metal puck across a greased sheet of metal at constant speed requires a force of 0.525 N. If the force of gravity on the puck is 5.00 N, what is the coefficient of friction between the... more
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01/13/16

A 300g object is slowed down from 40m/s to 10m/s in 4 seconds by a pressure of 9 Pascals. What is the area?
Show work please.
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01/10/16

Newtons law of cooling
A yam which is initially at 45 degrees F is placed in an oven which is at 425 degrees F. The rate of change is known to be -.19, when t is measured in hours. How long to the nearest minute will it... more
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01/05/16

Write the equation of a line in slope intercept form with the given information
passing through the points (-3,7) and (4,9)
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01/01/16

An electron and proton moving with the same velocity enter a uniform magnetic field. which one of them experiences more force?
An electron and proton moving with the same velocity enter a uniform magnetic field. which one of them experiences more force?
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12/21/15

Functions Question
if f(x)= x2+6x+8 has the roots of -8 and 2, what most the value of k be?ii) if f(x)=x2+6x+8 has equal roots; what's the value of k?
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12/17/15

Explain physics question and answer.
Ball A of mass 5 kilograms moving at 20 meters per second collides with ball B of unknown mass moving at 10 meters per second in the same direction.   A car traveling at 20 m/s has 1,000 J of... more
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12/06/15

Physics Question please HELP
While relaxing at a wave pool after a physics test, you notice the wave machine making 12 waves in 40 s and the wave crests are 3.6 metres apart. a) Determine the velocity that the waves must be... more
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12/05/15

physics question
Besides its weight, a 3.70 kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.70i hat - 3.30j) m, where the direction of... more
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12/03/15

I dont get this:(The vertex of a quadratic function is (-3,5). This means that
A: The axis of symmetry is x=-3 and the minimum or maximum y value is 5. B: The minimum or maximum value of the function is -3 and the y-intercept is 5. C: The x-intercept is -3 and the minimum or... more
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12/03/15

you can tell object has moved because its veolcity has changed
How to make this sentence true.
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12/02/15

Show that the rectangle of a perimeter is always a square.
Show that the rectangle of a minimum perimeter for a given area A is always a square.
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11/18/15

Consider the graph of the line connecting the given points, A & B. A(-7,-1), B(-5,-1).
Consider the graph of the line connecting the given points, A & B. A(-7,-1), B(-5,-1).   Step 1: Fine the slope. If applicable, write "undefined" for the slope.    m=______   Step 2: Find... more
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11/18/15

least degree that has rational coefficients, a leading coefficient of 1 and the given zeros
how do you write a polynomial function of least degree that has rational coefficients, a leading coefficient of 1, and the zeros: 1, -2, -5
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11/15/15

If the population doubled in size over 10 months and the current population is 90,000, what will the population be in 4 years?
The population of the southern city follows exponential law.
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11/15/15

exponential function real world
a new prototype of nanobots self replicate continually at a rate such that their population doubles every three hours. If we initially observe that there are 4000 nanobots, write an equation for... more
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