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Edwin
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Edwin
Questions (88)
A flywheel of moment of inertia 0.32 kgm^2 is rotated steadily at 120rad/s by a 50 W electric motor. (i)find the kinetic energy
4 answers
4,730 views
A bird of mass 0.8kg hovers upwards by beating the mass of effective area 0.5m^2. (i) what is its upthrust? (ii) estimate the
4 answers
1,107 views
A plane progressive wave is represented by the equation: y= 0.1sin(200pi(t)-20pi(x/17) where y is the displacement in
4 answers
1,977 views
A tree and a flag pole are on the same horizontal ground, A bird on top of the tree observes the top and bottom of this flag
5 answers
2,355 views
In some states, real estate agents are legally required to A. back up the claims their clents make about home conditions. B.
4 answers
1,318 views
In some states, real estate agents are legally required to A. back up the claims their clents make about home conditions. B.
2 answers
531 views
Why can multicellular organisms be more complex than unicellular organisms?
3 answers
811 views
is the most important step to help improve America's business ethics?
2 answers
573 views
According to the Uniform Partnership Act, the three key elements of any general partnership are
3 answers
1,062 views
(b) the digits of a positive integer having three digits are in A.P and their sum is 15. The number obtained by reversing the
2 answers
716 views
(b) the digits of a positive integer having three digits are in A.P and their sum is 15. The number obtained by reversing the
1 answer
1,175 views
Don't understand differences between lo, la, le
1 answer
282 views
The density of nitrogen at STP is 1.25 kgm^-3. Find the r.m.s velocity of nitrogen molecule at 20 degree centigrade.
2 answers
483 views
The heat capacity of a mercury thermometer is approximately equal to the volume immersed in metre cube multiplied by a constant
2 answers
666 views
24 kg of water are heated by a thermostatically controlled 4Kw electric heater. The thermostat switches the heater on at 60
2 answers
503 views
Two spheres S1 and S2 of the same metal and having the same type of surface, have radii 20cm and 10cm respectively. Compare
2 answers
554 views
A silver wire has resistance of 2.1ohms at 27.8 degree celsius and resistance of 2.8ohms at 98 degree celsius. Determine the
1 answer
504 views
The electrical motor runs on a D.C source of emf E and internal resistance r. Show that power output of the motor is max where
1 answer
936 views
A 24V battery of internal resistance of 10ohms is connected to a variable resistor. At what value of current drawn from battery
4 answers
1,078 views
A plane sound wave propagated in air has individual particles which execute a periodic motion such that their displacement y
3 answers
452 views
What vibrates in the following types of wave motions (i) light waves. (ii) sound waves. (iii) x-rays.
1 answer
403 views
A plane progressive wave on a water surface is given by the equation y=2sin2pi(100t-x/30) where x-is the distance covered in a
3 answers
533 views
A vibrator attached and resting on the surface of water generates plane water waves and its propagation is found to take 50
2 answers
488 views
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of
1 answer
923 views
Find the vector eqn which passes through (1,1,2) and is parallel to the vector which is perpendicular to both 2i+2j-k and
1 answer
435 views
Find (a) the potential and (b) the field strength at points A and B due to two small spheres X and Y 1.0m apart in air and
1 answer
421 views
A flywheel with an axle 1.0cm in diameter is mounted in frictionless bearings and set in motion by applying a steady tension of
5 answers
2,293 views
The static pressure in a horizontal pipeline is 4.3 x 10^4 Pa, the total pressure is 4.7 x 10^4 Pa, and the area of
3 answers
922 views
A small source O of electromagnetic waves is placed some distance from a plane metal reflector M. A receiver R, moving between O
2 answers
613 views
Water flows steadily along a uniform flow tube of cross-section 30cm^2. The static pressure is 1.20 x 10^5 Pa and the total
2 answers
992 views
If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of
4 answers
2,096 views
water flows along a horizontal pipe of cross-sectional area 48cm^2 which has a constriction of cross-sectional area 12cm^2 at
3 answers
931 views
Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel
1 answer
446 views
A progressive and a stationary simple harmonic wave each have the same frequency of 250Hz and the same velocity of 30m/s.
3 answers
965 views
A beam of electromagnetic waves of a wavelength 3.0cm is directed normally at a grid of metal rods, parallel to each other and
1 answer
500 views
water flows along a horizontal pipe of cross-sectional area 48cm^2 which has a constriction of cross-sectional area 12cm^2 at
3 answers
820 views
Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel
2 answers
565 views
In the design of a passenger bus, it is proposed to derive the motive power from the energy stored in a flywheel. The flywheel,
1 answer
494 views
A small piece of cork in a ripple tank oscillates up and down as ripples pass it. If the ripples travel at 0.20m/s, have a
6 answers
4,266 views
A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The
5 answers
3,006 views
A special prototype model aeroplane of mass 400g has a control wire 8cm long attached to its body. The other end of the control
4 answers
912 views
An open tank holds water 1.25 m deep. If a small hole of cross section area 3cm^2 is made at the bottom of the tank, calculate
4 answers
2,238 views
A ball is dropped from a height of 20m and rebounds with a velocity which is 3/4 of the velocity with which it hit the ground.
5 answers
1,642 views
A special prototype model aeroplane of mass 400g has a control wire 8cm long attached to its body. The other end of the control
1 answer
682 views
A light rigid bar is suspended horizontally from two vertical wires, one of steel and one of brass. Each wire is 2.00m long. The
3 answers
1,480 views
If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of
2 answers
614 views
a fluid flows through a horizontal pipe of varying cross-section. Assuming the flow is streamline and applying the bernoulli
1 answer
763 views
a fluid flows through a horizontal pipe of varying cross-section. Assuming the flow is streamline and applying the bernoulli
2 answers
559 views
Show that a force acting along a given line can always be replaced by a force of the same magnitude acting along a parallel
1 answer
322 views
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of
2 answers
555 views
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of
2 answers
545 views
A clean glass capillary tube is held vertically in water raised to a height of 7cm. The tube is down depressed and only 5cm of
1 answer
612 views
Three charges of 5 x 10^(-6) C are placed on the vertices of an equilateral triangle of 10cm. Calculate force on each charge.
3 answers
1,176 views
A straight line AB of length 10 units is free to move with its ends on the axes. Find the locus of a point P on the line at a
3 answers
570 views
given ax^2 +bx +c=0. one root is square of the other, without solving the expression proove that: c(a-b)^3 = a(c-b)^3
1 answer
304 views
A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from the
3 answers
4,051 views
Sorry for re-posting but I need to know if I did it right, please help, I worked out the problem I just want to know if I did it
3 answers
566 views
Yep its me again... sorry for re-posting this question but I am quite desperate here and I need to have this question answered,
3 answers
497 views
3x^2-12x-24=0
4 answers
844 views
In what year did Napoleon lead the battle of waterloo?
1 answer
471 views
define a supply chain driver and show it's relation to supply chain focus with a couple of examples
4 answers
1,204 views
what are the main assumptions underlying organizational communication?
1 answer
986 views
Many organizations find themselves in the apparently contradictory position of having high levels of financial investment in
3 answers
1,060 views
what does multi-tier supplier mean?
1 answer
306 views
Based on your knowledge of the relationship between photosynthesis and CO2, explain why CO2 concentrations cycle throughout the
1 answer
456 views
How would I revise this sentence to eliminate unnecessary shifts in tense, mood, voice, or person?
The freezing weather is
4 answers
557 views
I would for you to overlook my narrative essay, for corrections and your advice. The essay is not finished, but would like to
2 answers
1,083 views
A saturated solution of CaF2 (of MW 78.0
g/mol) contains 0.0167 grams per liter. What is the solubility product constant of CaF2?
3 answers
1,411 views
A solution of NaOH(aq) contains 7.7 grams of NaOH in 93 mL of solution. Calculate the pH at 25◦C.
---- 7.7 grams x (1
2 answers
702 views
A person rides a motorbike 145 m along a road that slants upward at 4.5 o from the horizontal.
How much higher will the rider be
1 answer
335 views
A third baseman makes a throw to first base 39.7 m away. The ball leaves his hand with a speed of 37.0 m/s at a height of 1.5 m
2 answers
518 views
A golf ball hit at a speed of 77 m/s will carry (achieve its maximum flight distance of) 256 m when driven at a launch angle of
3 answers
557 views
You have been hired as a financial consultant to defense electronics,Inc.
2 answers
624 views
From 1 to 9, which number should be put in the middle of a magic square( 3 by 3 magic square), so that no matter how you add
2 answers
538 views
Use the normal distribution of weights of adult men, which has a mean of 170 pounds and a standard deviation of 7.5 pounds. Use
3 answers
718 views
without oxygen cellular respiration grinds to a standstill although glycolysis can continue to make some atp anaerobically for a
2 answers
704 views
A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The
3 answers
1,367 views
What is the smallest positive integer?
5 answers
620 views
Why did China’s economy succeed when the Soviet economy failed in the 1980s?
A) China became more economically isolated and
13 answers
6,033 views
A brass rod is 2.0 metres long at a certain temperature. What is its length for a temperature rise of 100 kilogram if the linear
1 answer
634 views
The temperature was -5∘F and then fell 8∘F.
Don't get it
4 answers
700 views
A 0.02 kg bullet has a speed of 500 m/sec. What is its kinetic energy
3 answers
1,004 views
Give me the whole answer for the whole thing please
Im
1 answer
182 views
A pendulum Bob has it's maximum speed at 3ms at the lowest position of 0.calculate the height of the Bob above 0.where it's
1 answer
282 views
Explain two factors why risky behavior it is important for youth
3 answers
1,059 views
A Uniform Metre Rule Of Mass 120g Is Pivoted At 60cm Mark. At What Point On Metre Should Mass Of 50g Be Suspended For It To
1 answer
354 views
If a gas * is a times heavy as hydrogen which will diffuse faster and by what factor.
1 answer
261 views
write a program to compute the average age of N students
2 answers
160 views
