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Physics
Page 26
Questions (146,364)
A lobster tank in a restaurant is 0.75 m long by 0.5 m wide by 50 cm deep. Taking the density of water to be 1000 kg/m^3, find
4 answers
asked by
Sean
996 views
a 400 kg block of iron is heated from 295 k to 325 k. how much heat is absorbed by the iron? ( the specific heat is 450 j. /kg.
4 answers
asked by
michelle
1,555 views
Explain why, when a polythene rod which has been rubbed with any cloth is held high above small pieces of paper on a table, the
4 answers
asked by
Jennifer Martins
654 views
a framed picture of weight 15N is hung on a wall, using a piece of string. The ends of the string are tied to two points, 0.60 m
4 answers
asked by
anon
1,086 views
Block A (60 N) and block B (40 N) are connected by a massless cord and are AT REST. Given ìs = 0.8.
The friction on A is : 1. 40
4 answers
asked by
help !
1,596 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
asked by
Edwin
2,063 views
use boyles law to solve for the missing value in the following
P1=0.75atm,V2=435ml,P2=0.48atm, V1=?
4 answers
asked by
amie
1,734 views
100g of radioactive element X are placed in a sealed box. The half-life of this isotope of X is 2 days. After 4 days have
4 answers
asked by
A.S
2,213 views
The figure shows a girl and a boy each exerting a force to move a
crate horizontally a distance of 13 m at a constant speed. The
4 answers
asked by
Anonymous
1,935 views
A string is wound is tightly around a wheel. When the end of the string is pulled through a distance of 10 cm, the wheel rotates
4 answers
asked by
Amy
3,525 views
The moment of inertia of a solid uniform sphere of mass M and radius R is given by the equation I=(2/5)MR2 . Such a sphere is
4 answers
asked by
Anonymous
4,157 views
a 2 kg block slides down a frictionless incline from point A to point B. A force(magnitude P=3N) acts on the block between A and
4 answers
asked by
Robert
3,890 views
A bullet fired vertically upwards from a gun held 2m above the ground reaches its maximum height in 4sec, calculate its initial
4 answers
asked by
Saul
1,836 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
asked by
Edwin
2,250 views
State the principle of moments. You are supplied with a meter rule ,a 100g weight, a knife edge, thread an object mass between
4 answers
asked by
Anonymous
801 views
1. A stone is tossed upward with a velocity of 8m/s from the edge of a cliff 63 m high. How long will it take the stone to hit
5 answers
asked by
Betty
1,237 views
a key is dropped from a height of 30 m , If its distance from the ground at t seconds after the release is given by the position
4 answers
asked by
Anonymous
1,088 views
A person notices a mild shock if the current along a path through the thumb and index finger of one hand exceeds 80 ìA.
In
4 answers
asked by
crystal
757 views
Two people are on a playground bridge, above a fresh layer of snow. They each drop an object into the snow from a height of 2
4 answers
asked anonymously
185 views
if the velocity of a progressive wave with a periodic frequency of 10KHz is 330m/s. calculate it's wavelength.
4 answers
asked by
iornav Gideon
563 views
a cannon is 80 feet long. the muzzle velocity = 960 ft / sec. if fired strait up, what is the maximum height
4 answers
asked by
josh
746 views
The angular speed of a larger pulley wheel (radius=15cm) is 50 rev./min. Find the angular speed of the smaller wheel
4 answers
asked by
Mary
1,417 views
A STP of a certain mass of gas occupies a volume of 800cm cube. find the temperature at which the gas occupies 940cm cube and
4 answers
asked by
Omotosho Silas Segun Ayobami
604 views
How deep is the water in a tank 4m long and 3m wide if it's mass is 24000kg
4 answers
asked by
Iyore
434 views
A METRE RULE IS BALANCED BY MASSES OF 24 G AND 16 G SUSPENDED FROM ITS ENDS. FIND THE POSITION OF ITS PIVOT.
4 answers
asked by
Anonymous
514 views
A cylindrical iron rod 8cm height and 6cm in diameter stands in a cylindrical tin 12cm in diameter water is poured into the tin
7 answers
asked by
Christopher
1,560 views
Two forces 10N and 20N are inclined at an angle of 60 to each other.find the resultant force?if the two forces are now made to
4 answers
asked by
Fidelis
938 views
A 5g bullet is fired horizontally and hits an 8kg block of wood (initially at rest) which can move freely. The wood and the
4 answers
asked by
Angel
4,657 views
A rocket is used to place a synchronous satellite in orbit about the earth. What is the speed of the satellite in orbit?
4 answers
asked by
NJ
3,136 views
Morana is trolling for salmon in Lak Ontario. She sets the fishing rod so its tip is 1 m above the water and the line enters the
4 answers
asked by
Kim
1,589 views
What mass of ice is needed to cool 60g of water from 43oC to 20oC
4 answers
asked by
sam
1,199 views
A skydiver jumped out of an airplane and deployed her parachute 60 seconds later. This table shows her altitude over time.
Time
4 answers
asked by
A
209 views
Where do sound waves travel faster?
A.) through denser materials, because the molecules in a tightly packed medium collide more
4 answers
asked by
goodog
195 views
A beam of thermal neutrons emitted from the opening of a reactor is diffracted by the (111) planes of nickel crystal at an angle
4 answers
asked by
mwk please please help
403 views
A hydraulic jack has an input piston that is 1.2 cm2 in area and an output piston that is 144 cm2 in area. How much input or
4 answers
asked by
DariaV
2,335 views
What are some pros and cons for energy level diagrams and electron configuration diagrams?
I was very long for elements like
4 answers
asked by
Lena
1,976 views
1) If the kelvin temperature of a gas sample in a steel tank increases to three times its original value , what will happen to
4 answers
asked by
Jason
1,048 views
an effort of 250N is applied to a pulley system consisting of two fixed and two movable pulleys to lift a load to a height of
5 answers
asked by
Charles
631 views
The truck in that example is traveling at 19 m/s. The density of air is 1.29 kg/m3. By how much does the pressure inside the
3 answers
asked by
Anonymous
1,412 views
1.) Water flows from a 2 cm diameter pipe, at a speed of 0.35m/sec. How long will it take to fill a 10 liter container?
2.) A
4 answers
asked by
Akitsuke
1,785 views
The speed of sound in a gas depends upon the average speed of the gas molecules. Why is such a relationship reasonable?
The
3 answers
asked by
Lacy
1,074 views
a piece of metal of mass 50g heated to 100°c is dropped into 200g of water of 14°c in copper calorimeter weighing 80g and
3 answers
asked by
blessyn
637 views
Two forces of 20 N and 5 N are acting at an angle of 120 degree between them. Find the resultant force in magnitude and
3 answers
asked by
Tushar
2,984 views
The brakes of a car traveling at 16 m/s can decelerate it until it stops after 10m. Find (a) its negative acceleration, and (b)
4 answers
asked by
Allyn
1,481 views
A 23.9 g piece of metal heated to 97.8 oC is placed in 52.4 g water at 21.9 oC. After the
metal is added, the temperature of the
4 answers
asked by
HAY
2,086 views
Green light is emitted when electrons in a substance make a particular energy-level transition. If blue light were instead
3 answers
asked by
Jake
1,813 views
How is an echo formed?
3 answers
asked by
Need to know
226 views
which term best describes the force exerted on the structural parts of a building?
a. density b. load c. weight d. gravity
7 answers
asked by
no name
642 views
Calculate the change in temperature that would shrink a room-temperature balloon to one-half its size. Vo is 10 Vf is 5
5 answers
asked by
DariaV
1,163 views
a circular track is made on which an athlete has to cover three rounds to complete a 1000m run.during the run find the distance
4 answers
asked by
aashi
1,211 views
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