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tyger2020
Questions (48)
Construct a frequency distribution with five classes for the following data:
82, 76, 88, 77, 90, 71, 66, 120, 111, 108, 93, 116,
1 answer
737 views
I'm reposting this one because I'm still stuck...
A uniform rod of mass M and length d is initially at rest on a horizontal and
1 answer
1,272 views
A small block of mass m=1 kg glides down (without friction) a circular track of radius R=2 m, starting from rest at height R. At
1 answer
1,294 views
A uniform rod of mass M and length d is initially at rest on a horizontal and frictionless table contained in the xy plane, the
0 answers
825 views
A small block of mass m=1 kg glides down (without friction) a circular track of radius R=2 m, starting from rest at height R. At
0 answers
863 views
A uniform rod of mass M and length d is initially at rest on a horizontal and frictionless table contained in the xy plane, the
1 answer
1,139 views
A small cube of mass m1= 1.0 kg slides down a circular and frictionless track of radius R= 0.5 m cut into a large block of mass
1 answer
962 views
A gunman standing on a sloping ground fires up the slope. The initial speed of the bullet is v0= 360 m/s. The slope has an angle
1 answer
1,091 views
The base of a record player is a disk that has a mass of 2 kg and a diameter of 34 cm. A child spins it so it rotates at a
1 answer
793 views
What is the minimum height you would have to place a solid ball of mass M and radius R (I = 2MR^2 / 5) on a hill in order for
1 answer
620 views
A yo-yo with mass M and radius R is wound with a light string. Someone drops it from rest with the string attached to a metal
3 answers
1,312 views
A yo-yo with mass M and radius R is wound with a light string. Someone drops it from rest with the string attached to a metal
0 answers
624 views
A painter is on a scaffold that hangs by two ropes. The scaffold weighs 2500 N, and the painter weighs 800 N. The breaking point
2 answers
1,859 views
A container filled with 20 identical marbles spills over and all the marbles fall towards the ground in a random pattern. What
1 answer
576 views
A compound metal bar has 4 kg of copper making up the first third of the bar, while the remainder is made of 12 kg of lead. The
1 answer
1,223 views
Why do we not see a lunar eclipse during each full moon when the earth is in between the Sun and the Moon? Does it depend on the
1 answer
586 views
A satellite moves in a circular orbit of radius 35.793 km. The Earth's radius and mass are Re = 6.37e6 m, and Me = 5.97e24 kg.
Fo
2 answers
715 views
I posted this before and didn't get an answer but I'm still stuck...
A 3m long, 290N uniform rod is held in a horizontal position
1 answer
1,067 views
A 3m long, 290N uniform rod is held in a horizontal position by two ropes at its ends. The left rope makes an angle of 150
0 answers
908 views
Why must a water skier moving with constant velocity lean backward? What determines how far back she must lean?
1 answer
836 views
When an acrobat walks on a tightrope, she extends her arms straight out from the sides. She does this to make it easier for her
1 answer
1,264 views
Serious bicyclists say that if you reduce the weight of a bike, it is more effective if you do so in the wheels rather than in
1 answer
929 views
A force described by F(t) = ½ t2 – 5t acts on an object from t = 0 to t = 3 seconds. The object, which has a mass of 2 kg, is
1 answer
775 views
A force of 75 N is applied to two boxes stacked on top of each other. The coefficient of kinetic friction between the bottom box
1 answer
781 views
A man stands on the roof of a 15.4 m tall building and throws a rock with a speed of 29.0 m/s at an angle of 33.3 degrees above
2 answers
2,212 views
A jet plane is flying at a constant altitude. At time t1 = 0, it has components of velocity vx = 88 m/s, vy = 115 m/s. At time
2 answers
3,757 views
A car is stopped at a traffic light. It then travels along a straight road such that its distance from the light is given by
1 answer
1,421 views
In the methane molecule, CH4, each hydrogen atom is at a corner of a regular tetrahedron with the carbon atom at the center. In
1 answer
8,588 views
A trombone player stands at the end zone (x = 0) of a football field and begins to play its fundamental tone. Assume the
2 answers
2,230 views
Two balls have 3 nC of excess charge and are 10cm apart. What is the magnitude of the repulsive force on each?
Electric field =
4 answers
572 views
Which harmonic frequencies can be detected in a tube closed at one end whose fundamental frequency is 200 Hz?
200 Hz 300 Hz 400
2 answers
1,272 views
In order to wake a sleeping child, the volume on an alarm clock is tripled. Under this new scenario, how much more energy will
2 answers
1,096 views
What factors affect the frequency of a wave?
A. the amplitude B. the energy of the wave C. the wavelength of the wave D. the
1 answer
2,352 views
To increase intensity of a wave by a factor of 50, by what factor should the amplitude be increased?
This is also coming from the
3 answers
1,281 views
Two identical waves undergo pure constructive interference. How is the resultant intensity related to that of the individual
1 answer
1,184 views
Which has a greater resistivity?
1. A copper rod that is shaped like a rectangular prism with dimensions of 1cm x 1cm x 1000m 2.
3 answers
1,209 views
A 7kg mass on a 12 N/m spring oscillates with an amplitude of 23cm.
What is the frequency of its oscillation in Hz? Find the
1 answer
706 views
Assume an aluminum platter that is 3.5 inches in diameter, 1mm thick, and spinning at 5400 rpm. Treat the platter as a solid
3 answers
715 views
If a 2000kg coaster is moving at 10 m/s on the top of the loop, what is the magnitude of the normal force that the track applies
6 answers
1,429 views
What is the angular momentum of the Moon in its orbit around Earth?
I assume I need the mass of the moon, radius of the moon, and
1 answer
959 views
What is the angular momentum of the Moon in its orbit around Earth?
I assume I need the mass of the moon, radius of the moon, and
2 answers
637 views
A 33kg child named Lindsey runs as fast as she can and jumps onto the outer edge of a merry-go-round. The merry-go-round is
3 answers
1,680 views
Suppose you start an antique car by exerting a force of 300 N on its crank for 0.250s. What angular momentum is given to the
3 answers
2,898 views
Consider a system like the example problem where a batting machine swings a bat but instead of a baseball, the bat hits a lump
1 answer
724 views
What is the angular momentum of the Moon in its orbit around Earth in kg m2/s?
I do not have any information about the moon, so I
2 answers
615 views
While punting a football, a kicker rotates his leg about the hip joint. The moment of inertia of the leg is 3.75 kg/m2 and its
3 answers
2,772 views
A baseball and a ball of clay are approaching each other. The mass of the baseball is 145 g and it is moving due west 5 m/s at
3 answers
1,348 views
A 7.77 kg pumpkin falls from a height of 12.3m. It hits the ground and comes to an abrupt stop in about 444 ms. What is the
2 answers
2,005 views
Answers (25)
Yes, A looks right
I just figured it out :)
Diagram got weird -- the second rope is supposed to be at position 5m, near the end of the scaffold.
I'd say B It certainly led to the start of the American revolution, but it officially started with the Battle of Lexington.
For the nonlinear equation, it can be something like: (x + 2) * (x - 5) and then FOIL it out like this: x^2 - 3x - 10 You can substitute any two different integers for 2 and -5 there, and it will be a nonlinear function with two solutions. For a linear
I still get 7.1e-4 with this equation
Energy - the ability to do work or cause change
Aha! Thank you! I got them both right now!
What about for resistivity though?
Yep! It is! Thank you!
Is it 9.36 * 10^-3 (angular momentum)? That seems awfully small
That's right - thank you! :)
Ok, still getting 20,400 because I know the car is upside-down in the loop.
Radius is 5m... Does that mean the answer would be 20,400?
p = 15 + r where p = pencils and r = rulers. b = 3r where b = books total number of items = p + b + r = 15 + r + 3r + r = 15 + 5r. p - 15 + 3(p-15) + p is how you express in terms of p. p - 15 + 3p - 45 + p = 5p - 60 is the total in terms of p.
@Steve thanks! I reposted the question with more details
The answer is C. Kinetic energy = 1/2 mass * velocity squared. 27,000 = 30kg * 30m/s * 30 m/s.
I don't see choices, but 74% = .74 so, .74(44) = money kept How many days? Let's say d days. Money donated = 44d - .74(44d). You can substitute your number of days in this expression.
Did you figure it out? First we can simplify. If there are 1000 meters in 1 kilometer, how many meters are in 2 kilometers? How about in 3 kilometers? You're grouping quantities together - with smaller quantities, how many inches in 3 feet if one foot is
The correct answer is B. the equation is: 4.5 + 0.75d (car 1) = 7.5 + 0.65d (car 2) which is choice B.
Thank you!!
Thank you! @Scott Using this method though, I get 7.06 as an answer...where am I making an error? 7.06 isn't even an answer choice for this problem? My choices are 9, -0.255, 1.75, and 4.02
Edit: I now got 3.14 m/s as the answer, which is still wrong.
WAIT! I got it now...made a mistake.........
