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Sandhya
Questions and answers by visitors named
Sandhya
Questions (146)
Express the number 25 as a sum of two nonnegative numbers whose product is as large as possible.
5 answers
2,992 views
A wheel of radius 0.5 m rotates with a constant angular speed about an axis perpendicular to its
center. A point on the wheel
5 answers
5,170 views
1. What is the best way to determine levelness?
Plot Position versus Time and compare the linear fit from each direction of
10 answers
1,725 views
Do circular electric lines of force exist ? why? what about magnetic lines of force?
Pl help
3 answers
335 views
For a L-C-R circuit Vin = v0*expjwt. Vout is taken across R
a) Calculate the impedance of the circuit measured from the input
9 answers
1,281 views
1. A ball is projected horizontally from the edge of a table that is 4.0 meters high, and strikes the floor at a point
3.0 meters
3 answers
602 views
1) You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's
1 answer
434 views
You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's
4 answers
513 views
Indicate true or false in each of the following statements:
1. A static magnetic field can do work on a current carrying wire
4 answers
768 views
1)Five possible transitions for a hydrogen atom are listed below: Select whether the atom gains or loses energy for each
4 answers
2,717 views
2)Identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 1282.0 nm. Enter the
3 answers
586 views
5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature.
5 answers
762 views
1)What is the longest wavelength light capable of ionizing a hydrogen atom in the n = 6 state
2)a. Calculate the energy of the
4 answers
2,427 views
5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature.
4 answers
1,510 views
1)7Be decays with a half-life of about 53 d. It is produced in the upper atmosphere, and filters down onto the Earth's surface.
3 answers
1,326 views
1)7Be decays with a half-life of about 53 d. It is produced in the upper atmosphere, and filters down onto the Earth's surface.
1 answer
626 views
1) An old wooden tool is found to contain only 11.9 percent of 14C that a sample of fresh wood would. How many years old is the
2 answers
522 views
1) An old wooden tool is found to contain only 11.9 percent of 14C that a sample of fresh wood would. How many years old is the
2 answers
569 views
1) The number of radioactive nuclei in a particular sample decreases over a period of 15 days to one-seventeenth the original
4 answers
2,017 views
1) An old wooden tool is found to contain only 11.9 percent of 14C that a sample of fresh wood would. How many years old is the
4 answers
2,629 views
A specimen taken from the wrappings of a mummy contains 7.02 g of carbon and has an activity of 1.34 Bq. How old is the mummy?
3 answers
387 views
Assume a liter of milk has an activity of 2400 pCi due to 40K. If a person drinks 2 glasses (0.460 l) per day, estimate the
1 answer
479 views
1.A truck with a mass 5000 kg is heading East at 20 m/s. Meanwhile a car with a mass 2500 kg is heading North at 30 m/s. The two
3 answers
735 views
11) Assume a liter of milk has an activity of 2400 pCi due to 40K. If a person drinks 2 glasses (0.460 l) per day, estimate the
1 answer
489 views
With regards to straight antennas and coiled antennas. Which one is better/more efficient at receiving, and why? Which one is
1 answer
1,051 views
1.The greenish blue of water is evidence for the
A) interaction between green and blue frequencies of light. B) reflection of red
3 answers
2,285 views
1. A 70 kg uniform 4.0 m long beam is attached to a vertical wall and is supported by a wire. The beam makes an angle of 45
3 answers
695 views
Three blocks of mass 1kg,2kg and 3kg move on a frictionless surface and a horizontal force 46 N acts on the 3kg block.1kg and
4 answers
2,084 views
1.In a cathode ray tube, electrons are accelerated from rest by a
constant electric force of magnitude 6.56 x 10*-17 N during the
3 answers
1,413 views
1.A roller coaster is towed up an incline at a steady speed of 0.500 m/s by a chain parallel to the surface of the incline. The
3 answers
864 views
A 66.0 kg base runner begins his slide into second base when he is moving at a speed of 4 m/s. The coefficient of friction
6 answers
731 views
A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.0 m/s as in the figure below. If his speed is 26.7 m/s
4 answers
843 views
Two men lifted a total mass of 653.2 kg approximately 4 in. off the ground a total of 24 times. Estimate the total mechanical
3 answers
653 views
A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through
2 answers
522 views
A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through
2 answers
558 views
The magnetic field inside a solenoid is 8.617 mT. If this solenoid sits with its central axis perpendicular to a 30 mT magnetic
2 answers
720 views
What is the force on an electron moving at v = 2.5*10^5 m/s away from a long wire,3mm from the electron, carrying a 12 A
3 answers
534 views
A 4.60-m-long, 580 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building
4 answers
969 views
Identical twins, each with mass 56.2 kg, are on ice skates and at rest on a frozen lake, which may be taken as frictionless.
3 answers
830 views
You are hired to check the technical validity of a futuristic
space mystery production. The scene takes place during the rst
5 answers
503 views
Two carts of equal mass, m = 0.280 kg, are placed on a
frictionless track that has a light spring of force constant k = 51.9 N/m
5 answers
652 views
A 1.00 kg hollow ball with a radius of 2.2^10^-1 m, filled with air, is released from rest at the bottom of a 1.50 m deep pool
2 answers
933 views
A 1500kg car travels at a constant speed of 22 m/s around a circular track that has a radius of 85 m.
What is the average
3 answers
2,120 views
Two metal disks are taped to a meterstick. The mass of the
meterstick is 460 grams. Disk 1 has a mass of 300 grams and is located
3 answers
559 views
An object starts sliding up a plane tilted at an angle of alpha = 5.0◦ to
the horizontal. The object’s initial speed is v =
2 answers
874 views
1) Sound propagating through air at 30 degree Celsius passes through a vertical cold front into air that is 40 degree Celsius.
3 answers
759 views
Ethyl alcohol flows through a horizontal tube of diameter 2.96
cm that is joined to a second horizontal tube of diameter 1.50 cm.
2 answers
530 views
A trapeze artist of mass m swings on a rope of Length L. Initially, the trapeze artist is at rest and the rope makes an angle
4 answers
1,165 views
A bungee jumper with mass 69.5 kg jumps from a high bridge.
After reaching his lowest point, he oscillates up and down, hitting a
3 answers
936 views
A mine car, mass= 440 kg rolls at a speed of 0.50 m/s on a horizontal track. A 150-kg chunk of coal has a speed of 0.80 m/s when
4 answers
2,459 views
A flag pole consists of a 2.0 m long, 5.0 kg decorative ball on the end. What is the gravitational torque on the flag pole,
3 answers
638 views
The intensity of an earthquake wave is measured to be 6 x10 ^6 J ms at a distance of 50 km from its source. Calculate the
2 answers
571 views
A bicycle with wheels of 70.0 cm diameter is going at a speed of 12.0 m/s.How fast is a point on the rim at the top of one of
3 answers
530 views
A car moving at a speed of approximately 176.5 km/h. 923 m in front of the car, there is a truck moving at a speed of 84.2 km/h
2 answers
589 views
A microphone is located on the line connecting two speakers that are 0.546 m apart and oscillating 180degrees out of phase. The
3 answers
977 views
A container of volume 0.39 m3 contains 8.7 mol of argon gas at 32◦C. Assuming argon behaves as an ideal gas, find the total
2 answers
558 views
5 mol of an ideal gas is kept at 394◦C in an expansion from 1 L to 5 L .How much work is done by the gas? Answer in units of
2 answers
730 views
. Ethyl alcohol has been added to 160 mL of water in a container that has a mass of 130 g when empty. The resulting container
3 answers
967 views
A rectangular trough, 2.0 m long, 0.50 m wide, and 0.50 m deep, is completely full of water. One end of the trough has a small
4 answers
4,600 views
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor
4 answers
1,550 views
In an amusement park rocket ride, cars are suspended from L = 4.28-m cables attached to rotating arms at a distance of d = 6.10
3 answers
1,019 views
An object of mass m is hanging by a string from the roof of an
elevator. We want to compare the tension in the string due to the
6 answers
3,431 views
A block of mass M is sliding down an inclined plane and is
accelerating. Which of the following statements are true? Choices:
5 answers
1,388 views
There is a horizontal rod of length L and mass M. A point mass m is vertically above the rod at a vertical distance L/4 and
1 answer
454 views
There is a horizontal rod of length L and mass M. A point mass m is vertically above the rod at a vertical distance L/4 and
3 answers
932 views
A thin brass ring of inner diameter 10cm at 20degrees C is warmed and slipped over an aluminum rod of diameter 10.01cm at
3 answers
1,557 views
Cosmic microwave background radiation fills all space with an average energy density of 4 x 10^-14 j/m^3.(a) Find the rms value
3 answers
1,756 views
A woman can see clearly her right eye only when objects are between 45 cm and 155 cm away. Prescription bifocals should have
2 answers
593 views
A woman can see clearly her right eye only when objects are between 45 cm and 155 cm away. Prescription bifocals should have
1 answer
688 views
1. Planet X orbits the sun with a mean orbital radius that is 6200 times that of earth. Its diameter is twice that of earth, and
2 answers
770 views
Force F causes displacement d of a 20-Kg object starting from rest along a frictionless path. F= 10 N i + 50 N j + 15 N k and d=
1 answer
471 views
A 2.0 kg block is attached to the end of a spring with a spring constant of 350 N/m and forced to oscillate by an applied force
2 answers
1,302 views
1.A spherical bowl(R = 20 cm) contains water(n = 1.33) and your pet gold fish who, is swimming 15 cm from the centre of the
2 answers
998 views
The hydrogen atom consists of a proton with an electron in orbit about the proton. The laws of quantum mechanics determine that
5 answers
849 views
Particle A has twice the mass of particle B, and carries three times the charge of B charge. Both particles are sent
2 answers
1,258 views
A 12 V battery is connected to 5 mega ohm resistor and a 6 micro farad capacitor and an open switch. After how many seconds will
3 answers
819 views
a)The star ships Enterprise and Potemkin leave the Earth and travel in opposite directions each at 0.60c relative to an observer
1 answer
405 views
Two 10 meter long wires are parallel to each other and 5 cm apart.They carry currents of 6.0 A in opposite directions. What is
2 answers
1,099 views
Design some simple digital circuits based on Boolean expressions. Draw circuits that implement the following Boolean expressions
2 answers
1,206 views
A particle moves from rest, its initial position being given by x = c with reference to a fixed point O. Its acceleration at a
1 answer
410 views
A bullet of mass ‘m’ traveling horizontally at a speed ‘v’ embeds itself in the centre of a block of wood of mass
2 answers
538 views
Find the period of revolution of an artificial planet if the semi-major axis of the planet’s elliptic orbit is greater than
2 answers
957 views
A straight horizontal rod A of mass 50 gm and length 0.5 m, is placed in a uniform horizontal magnetic field of 0.2 T,
2 answers
825 views
A coil of N turns is wrapped around an iron ring of radius ‘d’ and cross-section
‘A’ (d > > A). Assuming a constant
1 answer
485 views
A coil of N turns is wrapped around an iron ring of radius ‘d’ and cross-section
‘A’ (d > > A). Assuming a constant
1 answer
410 views
(i) the magnetic flux as a function of the current ‘i’, and
(ii) the magnetic flux if a gap of width delta^2 < < A) is cut in
1 answer
363 views
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on.
1 answer
390 views
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on.
1 answer
467 views
a) An infinite number of changes each equal to q are placed along the x-axis at x = 1, x = 2, x = 4, x = 8, . . . and so on.
1 answer
415 views
A uniform electric field E in the x-direction is produced by an appropriate charge configuration. A thin sheet of charge s per
2 answers
531 views
Two metal spheres, each of mass 1 gm and radius 0.5 cm are placed on a smooth, horizontal, insulated plate such that their
3 answers
588 views
(a)The angular speed of a ceiling fan is increased uniformly in 3.0 s from 180 revs/min to 290 revs/min. What is the angular
2 answers
502 views
a) what is the density of a log floating in salt water if 42% of its volume is exposed? The density of salt water is 1025 kg/m^3
1 answer
428 views
A mass m = 1.50 kg oscillates on an ideal,massless horizontal spring with a constant k = 73.5 N/m.The amplitude of oscillation
2 answers
1,113 views
A clump of soft clay is thrown horizontally from 78.40 m above the ground with a speed of 27.0 m/s. Where is the clay after 4.5
2 answers
686 views
A particle's constant acceleration is south at 2.1 m/s2. At t = 0, its velocity is 42.6 m/s east. What is the magnitude and
1 answer
326 views
A speedboat heads west at 115 km/h for 16.0 min. It then travels at 56.0° south of west at 87.0 km/h for 9.0 min.
(a) What is
1 answer
456 views
A skydiver is falling straight down at 60 m/s when he opens his parachute and slows to 8.3 m/s in 4.0 s. What is the average
2 answers
1,055 views
Peggy drives from Cornwall to Atkins Glen in 46 min. Cornwall is 73 km from Illium in a direction 29° west of south. Atkins
2 answers
647 views
1.A spherical condenser has inner and outer spheres of radii a and b respectively. The space between the two is filled air. The
4 answers
1,457 views
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