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Tammy
Questions and answers by visitors named
Tammy
Questions (463)
An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates
4 answers
14,054 views
A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from
11 answers
18,062 views
In October, a HARDWARE STORE purchased snow shovels for $8 each. The original markup was 50% based on the selling price. In
3 answers
937 views
When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if
6 answers
9,494 views
Sometimes, certain enzymes are associated with a particular organelle of the cell. Many times scientists have had to use
1 answer
549 views
Gavin wants to estimate the gas mileage in his car.
At 85,076 mi, he fills the tank with 10.2 gal of gasoline. At 85,548 mi, he
3 answers
743 views
Why are enzymes needed by the cell?
en.wikipedia. org/wiki/Enzyme
1 answer
323 views
Can someone explain how the DNA vaccine differ from a traditional vaccine?
1 answer
352 views
Can someone explain how the DNA vaccine differ from a traditional vaccine?
Since this is not my area of expertise, I searched
1 answer
509 views
if the incidence of cystic fibrosis is 1 in 2500, what is the expected frequency of carriers for the CF allels? assume that this
1 answer
839 views
DNA was collected from 100 people and subjected to a restriction digest with BamHI. These samples were then analyzed using
1 answer
626 views
Hi i was wondering what the square root of 3 times the squareroot of 9 is with little 3's on on the outside of the square roots
1 answer
437 views
i see were u got that from but this 1 is confusing.
6 (index 3) square root of 36 times 2 (index 3)square root of 6 Please use
1 answer
1,214 views
How much work is needed to raise a 110-kg load of bricks 12 m above the ground to being under construction?
work in joules=
1 answer
573 views
A golf ball and a ping-pong ball are dropped in a vacuum chamber. When they have fallen halfway down, they have the same...
3 answers
2,892 views
Does increasing the frequency of a wave also increase its wavelength? If not, how are these quantities related?
high frequency.
1 answer
616 views
A .30kg softball had a velocity of 15m/s at an angle of 35 degrees below the horizontal just before making contact with the bat.
1 answer
774 views
A concluding strategy which helps to promote unity within a speech is
a)a summary of main points b)a rhetorical question c)a
1 answer
455 views
A .30kg softball had a velocity of 15m/s at an angle of 35 degrees below the horizontal just before making contact with the bat.
1 answer
796 views
A 6090kg space probe mobing nose-first toward Jupiter at 105m/s relative to the Sun, fires its rocket engine ejecting 80 kg of
3 answers
1,949 views
A rocket whish is in deep space and initially at rest relative to an inertial reference frame, has a mass of 2.55 X 10^5 kg of
3 answers
1,367 views
A railroad flatcar of weight W can roll without friction along astraight horizontal track. Initially, a man of weight w is
4 answers
1,958 views
Trolley B will be at rest and trolley A will be given a push such that it collides with B, and they both move as one mass after
1 answer
495 views
Would you say Steinbeck uses indirect or direct characterization of the characters? I think it's direct. For example he says,
1 answer
559 views
A 50g mass (M1) will be attached to the trolley M2) and will cause it to accelerate a distance of between .5 to .6m. You also
1 answer
553 views
After a completely inelastic collision two objects of the same mass and the same initial speed are found to move away together
1 answer
665 views
The position of a toy locomotive mobing on a straight track along the x-axis is given the equation x=t^3-6t^2 +9t where x is in
3 answers
578 views
A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual
2 answers
937 views
A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate
7 answers
15,259 views
The velocity of a projectile at launch has a horizontal component v_h and a vertical component V_V. Air resistence is
3 answers
548 views
A target lies flat on the ground 3m from the side of a building which is 10m tall. A student rolls a ball off the horicontal
3 answers
1,596 views
To streatch a certain nonlinear spring by an amount 2x requires a force F given by F=40x-6x^2 where F is in newtons and x is in
1 answer
1,061 views
When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if
3 answers
1,482 views
A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate
3 answers
1,508 views
A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual
4 answers
3,419 views
A force F is exerted by a broom handle on the head of the broom, which is of mass m. The handle is at angle theda to the
4 answers
2,841 views
I need help with slopes and lines.
Determine the slope of each line a line through points (-1, 2) and (2, -7) Slope of a line
1 answer
483 views
For the universal set U= {0,1,2,3,4,5,6,7}
And the sets A={1,5}, B={1,2,3,4} And C= {4, 6} lists the elements in the following
1 answer
420 views
Find the derivative of
a) y=cos (x/2) b) yx-3x^2 +6 = y^4 + x a) -sin (x/2)(2+x)/2^2 -sin(x/2)(x/2) b) x dy/dx + y - 6x = 4y^3
1 answer
499 views
intergral of (x^3 -4x + 3)/(2x) dx
would this be ln abs(x^3-4x+3) + C? I don't really understand how to solve this problem. d/dx
1 answer
1,116 views
First I would find the first derivative which is the slope and then would I
plug in the given value into the original equation to
1 answer
478 views
The solubility of KCLO3 at 25 degree celcius is 10.9 per 100.g of h20.
question: If 15 g are addded to 100 g of water at 25
1 answer
726 views
I need help with finding a potential market and product to get my export operations started. I need a 15to20 PowerPoint
1 answer
949 views
describe an application for the use of ratios or portions. And describe how an application problem could be useful in daily
1 answer
395 views
(3x+4)/(3x-4)+(3x-4)/(3x+4)
--------------------------- Divide top by bottom (3x-4)/(3x+4)-(3x+4)/(3x-4) Very Big Problem and
1 answer
392 views
Solve Q=(n-s)/n for n
To get you started, multiply both sides by n and go from there. Post your work if you get stuck AND tell us
1 answer
392 views
Simplify [(1)-(1/x+2)] / [(1)- (3/x+4)]
I know I need to find the LMC here, and the answer is (x+4)/(x+2) but I do not know how
1 answer
346 views
Electronics
The electrical resistance (r) of a cable varies directly (y=kx) as its length (l) and inversely (y= k/x) as the
1 answer
500 views
Please read and then help me!
(x^(-3/5)) ----------- divide x ^ (1/5) I know the problem then needs to look like this:
1 answer
975 views
I think that the goal is to get rid of the 5th root in this case. I know that I have to make whatever is under or in the root
1 answer
1,189 views
How many cubic millimeters are there in one square centimeter?
I know that in one square centimeter there is 100 millimeters
1 answer
384 views
Write the statement using absolute value notaion:
The distance between x and 1 is 7. I got the answer as the absolute value of x,
1 answer
444 views
An average human heart rate is 70 beats per minute. How many times it beats over 70 year lifetime? use scientific notation.
365 =
3 answers
1,228 views
Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance
1 answer
1,330 views
When is the average velocity of an object equal to the instantaneous velocity?
a) always b)never c) only when velocity is
1 answer
619 views
a car manufacture advertise that a car goes "from zero to sixty in 8 seconds" is a description of:
a) average speed b)
1 answer
426 views
Object A and B both start at rest. They both accelerate at the same rate. However , object A accelerates for twice the time as
4 answers
2,431 views
a car manufacture advertise that a car goes "from zero to sixty in 8 seconds" is a description of:
a) average speed b)
3 answers
595 views
When is the average velocity of an object equal to the instantaneous velocity?
a) always b)never c) only when velocity is
3 answers
3,159 views
Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance
3 answers
2,408 views
If you are driving at 65mph along a straight road and you look to the side for 2 seconds, how far do you travel during this
1 answer
452 views
A car starts from rest and undergoes uniform acceleration. During the first second it travels 6 m.
a) what is the car's
2 answers
502 views
A car starts from rest and accelerates at 5 m/s^2 for 4 s, then maintains that velocity for 3 seconds, then decelerates at the
2 answers
980 views
You are driving home on a weekend from school at 65mph for 130 miles. It then starts to snow and you slow to 45 mph. You arrive
2 answers
646 views
A car with good tires on a dry road can decelerate at about 5 m/s^2 when breaking. Suppose a car is initially traveling at 65
2 answers
515 views
You are driving home on a weekend from school at 65mph for 130 miles. It then starts to snow and you slow to 45 mph. You arrive
2 answers
677 views
A car starts from rest and accelerates at 5 m/s^2 for 4 s, then maintains that velocity for 3 seconds, then decelerates at the
3 answers
1,415 views
A car starts from rest and undergoes uniform acceleration. During the first second it travels 6 m.
a) what is the car's
2 answers
594 views
The sum of 2 vectors is the smallest when the angle between them is :
a) 0 b) 45 c) 90 d) 180 d) i believe is the correct answer
3 answers
1,045 views
Which of the following is an accurate statement?
a) a vector cannot have zero magnitude if one of its components is not zero b)
2 answers
1,239 views
Three vectors, each have a magnitude of 30 units, have their tails at the same oint and are directed 120 degrees from each
3 answers
991 views
Killer whales at Sea Worl routinely jump 8 m above the water. What is their speed as they leave the water to achieve this?
I know
1 answer
420 views
A small mailbag is releassed from a helicopter that is ascending steadily at 5m/s. After 2s. a) what is the speed of the
1 answer
465 views
"from zero to sixty in 8 seconds" is a description of:
a) average speed b) instantaneous speed c)average acceleration d)
4 answers
1,209 views
A car starts from rest and accelerates at 5m/s^2 for 4s, then maintains that velocity for 3 seconds and then decelerates to a
2 answers
651 views
Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. make a statement
4 answers
6,440 views
On a postition versus time graph to find the acceleration you would simply find the area under the graph right? and how would
1 answer
433 views
A projectile is shot horizontally at 30m/s from the roof of a building 100m tall. Use g=10m/s^2. Choose + vertical direction to
2 answers
1,224 views
A projectile is shot horizontally at 30m/s from the roof of a building 100m tall. Use g=10m/s^2. Choose + vertical direction to
2 answers
878 views
A jumper in the long-jump goes into the jump with a speed of 10m/s at an angle of 30 degrees above the horizontal. Use g=10m/s.
a
1 answer
740 views
When a football in a field goal attemp reaches its max height how does its speed compare to its inital speed?
a)it's zero b) it
4 answers
1,302 views
A plane flying horizontally at a speed of 50m/s and at an elevation of 160m drops a package. two seconds later it drops a second
4 answers
4,892 views
A jumper in the long-jump goes into the jump with a speed of 10m/s at an angle of 30 degrees above the horizontal. Use g=10m/s.
a
3 answers
1,810 views
A projectile is shot horizontally at 30m/s from the roof of a building 100m tall. Use g=10m/s^2. Choose + vertical direction to
1 answer
476 views
a ball thrown horizontally from a point 40m above the ground,strikes the ground after traveling a distance of 9m. with what
1 answer
397 views
When a football in a field goal attemp reaches its max height how does its speed compare to its inital speed?
a)it's zero b) it
2 answers
1,210 views
A projectile is launched from ground level with an inital velocity of 50 m/s at an angel of 60 degreess aove the horizontal. Use
2 answers
487 views
Unfortunately I was hit by the sweep of illnesses going around due to changing whether and missed school today. Thus I missed
2 answers
504 views
A constant net force acts on an object. Describe the motion of the object.
a) constant acceleration b) constant speed c) constant
4 answers
3,197 views
A stone is thrown straight up. At the top of the path, the net force acting on it is (ignore air resistance)
a) greater than its
3 answers
5,363 views
A stack of books rests on a level perfectly smooth surface. A force F acts on the stack and it acclerated at 3m/s^2. A 1kg book
1 answer
630 views
An example of a force which acts at a distance is
a) tension b) weight c) friction d) normal force Isn't the answer c) the
1 answer
815 views
Two books of masses m1=10kg and m2= 20kg are connected by a rope. The horizontal force on the more massive box is 900 N. Assume
2 answers
565 views
A .5kg ball hangs on a string attached to the ceiling. If the string is cut what forces act on the ball as it falls? Ignoring
2 answers
998 views
I have gotten help from here before and I was hoping that another kind person could help me again, since I always get such
1 answer
435 views
Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom.
These X rays are
2 answers
524 views
I am having a hard time on how to get V in wavelength= h/mv
If I multiply by mv then I get W(mv)=h Then I get Wmv=h I divide by
3 answers
488 views
Bolivian coffee sells for $4.59 per pound, and Columbian coffee sells for $5.95 per pound. How many pounds of each coffee should
5 answers
2,790 views
A wooden block slides directly down an incline plane at a constant velocity of 6 m/s. What is the coefficient of kinetic
4 answers
1,347 views
a packing ccrate slides down an incline ramp at constant velocity. Thus we can deduce that
a) a frictional force is acting on it
4 answers
1,467 views
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