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alba
Questions and answers by visitors named
alba
Questions (33)
when was the red rever cleard for boat travel?
1 answer
195 views
did the railrosds reach shreveport before or after the discovery of oil at caddo lake?
3 answers
438 views
Water sample from 6 public swimming pools are combined for one test regarding bacteria level.Further testing is done if the
1 answer
372 views
i cant understand v/cv and vc/v patter mean .can you giv me exemple
1 answer
839 views
A 0.278-kg volleyball approaches a player horizontally with a speed of 16.2 m/s. The player strikes the ball with her fist and
4 answers
6,154 views
A force of magnitude Fx acting in the x-direction on a 2.55-kg particle varies in time as shown in the figure below. (Indicate
4 answers
3,768 views
A 3.42-kg steel ball strikes a massive wall at 10.0 m/s at an angle of
θ = 60.0° with the plane of the wall. It bounces off the
2 answers
596 views
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. In this state, it would
1 answer
642 views
A satellite is in a circular orbit around the Earth at an altitude of 3.30 106 m.
(a) Find the period of the orbit. (Hint: Modify
2 answers
1,043 views
In a popular amusement park ride, a rotating cylinder of radius
R = 2.60 m is set in rotation at an angular speed of 4.00 rad/s,
2 answers
687 views
A 74-kg fisherman in a 129-kg boat throws a package of mass
m = 15 kg horizontally toward the right with a speed of vi = 4.7 m/s
1 answer
738 views
Find the net torque on the wheel in the figure below about the axle through O perpendicular to the page, taking a = 5.00 cm and
1 answer
963 views
The two conditions for equilibrium often result in a system of equations such as
F1 + F2 = 44.0 N and 3.00F1 − 8.00F2 = 0. find
1 answer
439 views
Solve the equations
1 2 mv2 + 1 2 Iω2 = mgh and v = rω for the speed v using substitution, given that I = mr2 and h = 4.20 m.
1 answer
779 views
A spinning wheel steadily slows from an initial angular velocity of 1.65 rev/s to 0.485 rev/s in 12.2 s.
(a) Calculate the
2 answers
768 views
A construction crane's cable lifts a 49.5-kg box upward with an acceleration of 1.30 m/s2. Find the tension in the rope.
N
4 answers
2,707 views
A man opens a 1.14-m wide door by pushing on it with a force of 49.5 N directed perpendicular to its surface.
(a) What magnitude
5 answers
4,049 views
A worker applies a torque to a nut with a wrench 0.485 m long. Because of the cramped space, she must exert a force upward at an
1 answer
995 views
A mass of 1.50 kg is at
(−2.55 m, 0) and a 2.04-kg mass at (4.00 m, 4.00 m). Find the center of mass of the system. ( m, m)
1 answer
385 views
A horizontal plank 4.12 m long and having mass 26.8 kg rests on two pivots, one at the left end and a second 1.03 m from the
1 answer
894 views
A student rides his bicycle at a constant speed of 2.20 m/s along a straight, level road. If the bike's tires each have a radius
1 answer
704 views
What is the magnitude of the angular acceleration of a 25.5-kg disk of radius 0.775 m when a torque of magnitude 41.5 N · m is
1 answer
467 views
A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m.
(a) Treating the tire as a hoop, what is its moment of inertia
2 answers
573 views
A bowling ball of mass 7.45 kg is rolling at 2.56 m/s along a level surface.
(a) Calculate the ball's translational kinetic
4 answers
1,674 views
A basketball player entertains the crowd by spinning a basketball on his nose. The basketball has a mass of 0.622 kg and a
1 answer
715 views
A disk of mass m is spinning freely at 6.22 rad/s when a second disk of identical mass, initially not spinning, is dropped on it
3 answers
949 views
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A
1 answer
687 views
A 310-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is
1 answer
645 views
Each of the following objects has a radius of 0.169 m and a mass of 2.02 kg, and each rotates about an axis through its center
2 answers
541 views
A bowling ball of mass 7.45 kg is rolling at 2.56 m/s along a level surface.
(a) Calculate the ball's translational kinetic
3 answers
685 views
A bicycle tire has a mass of 2.54 kg and a radius of 0.346 m.
(a) Treating the tire as a hoop, what is its moment of inertia
1 answer
688 views
in a class of 25 students, 15 play hockeyand 16 play basketball. if there are 4 students who play neither sport, determine the
5 answers
3,175 views
Determine a direction vector of the line of intersection of the two planes 2x - 7y + z = 5 and x + 3y - 6z = 2. If there is not
2 answers
634 views
Answers (2)
If a rod of 1025 steel 0.5 m long is heated from 20 to 80°C (293 to 353 K) while its ends are maintained rigid, determine the type and magnitude of stress that develops.
is 8.2because the dog round many time
