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Physics
Page 28
Questions (147,598)
You have 23.0g of water initially at -46°C. How much energy in joules is required to
heat the ice to 0°C? c ice = 2.1 J/g°C. I
4 answers
asked by
Harrison
833 views
If 3.20 kcal of heat is added to 1.00 kg of ice at 0 degrees C, how much water at 0 degrees C is produced, and how much ice
4 answers
asked by
Anonymous
2,923 views
Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and
4 answers
asked by
Jim
1,917 views
A 1.0 kg object is given a push along a horizontal surface. If the velocity of the object when it is released is 0.50 m/s west,
5 answers
asked by
Anonymous
1,488 views
A string with a linear density of 0.035 kg/m and a mass of 0.014 kg is clamped at both ends. Under what tension in the string
4 answers
asked by
Tina
2,582 views
A figure shows a uniform metre rule which is pivoted at the 20cm mark and balanced horizontally by an object of weight 3.15N
4 answers
asked by
Blessings
1,880 views
A .25 kg pool ball is moving at 5.0m/s E towards a second identical ball at rest. After the collision, the first ball is seen
4 answers
asked by
Gar
3,131 views
A golf ball is given an initial speed of 20 m/s and returns to ground level. Which launch angle above level ground results in
4 answers
asked by
Julie
3,631 views
A thin, light string is wrapped around the rim of a 4.00kg solid uniform disk that is 30.0cm in diameter. A person pulls on the
4 answers
asked by
Erin
2,006 views
A car of mass 760kg travels with a velocity of 14ms-1
If the brakes are applied,the car travels a distance of 55m before coming
4 answers
asked by
Alos
743 views
A spiral spring of natural length of 20.0cm has a scale pan hanging freely on its lower end. When an object of mass 40g is
4 answers
asked by
Grace
2,209 views
A girl whose weight is 30 N runs up a flight of stairs 5 m in 6 s. What is her average power
5 answers
asked by
Favour
1,266 views
a 3200-lb elevator cab is supported by a cable in which the maximum safe tension is 4000 lb. (a)what is the greatest upward
4 answers
asked by
esther
1,900 views
A 25 gram piece of metal is sitting in a beaker of boiling water. The metal is taken out of the beaker and quickly placed in a
5 answers
asked by
ANNIE
2,401 views
query=a stone of mass 30grams is placed in a measuring cylinder containing some water. the reading of the water level increases
4 answers
asked by
Matthew
1,341 views
If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter
4 answers
asked by
Anonymous
2,880 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
1,095 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 !
1,601 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
1,742 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
2,217 views
A 5 m, 10 kg seesaw is balanced by a little girl(25 kg) and her father(80 kg) at the extreme opposite ends. How far from the
4 answers
asked by
Pram
3,133 views
A fire truck attaches two fire hoses to a hydrant to fight a fire. Each hose has a
diameter of 20 cm. The underground water pipe
4 answers
asked by
K
551 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
3,896 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
1,842 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
2,258 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
804 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
1,090 views
Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0m/s and at the
4 answers
asked by
Sammy
2,954 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
188 views
What unit would you use if you need to measure the distance across the playground
4 answers
asked by
Anonymous
932 views
Which of the following does NOT describe a change in velocity?
A. Your mom drives 60 miled per hour on the freeway.*** B. A kite
4 answers
asked by
Cedric
838 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
567 views
The spring balance is calibrated in newtons. State how the mass of the rock sample
may be found from the reading of the spring
4 answers
asked by
rida
1,372 views
if the distance between crest were 1.5 meters apart, and 2 crest pass the pole each second, what would be the speed of the wave
4 answers
asked by
natalie
1,137 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
519 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
1,563 views
The magnetic force (Vector FM)on a particle in a magnetic field is found by Vector FM = Vector I × Vector B, Vector I is the
4 answers
asked by
Jackie
1,393 views
Two particles Q and P are shot up vertically.P was first shot with velocity of40m/s and after4s.Q was also shot up.If upon
5 answers
asked by
Boateng Emmanuel
2,264 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
3,143 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
1,593 views
What mass of ice is needed to cool 60g of water from 43oC to 20oC
4 answers
asked by
sam
1,210 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
197 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
404 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
2,337 views
A rapidly changing magnetic field in any region of space induces a rapidly changing A.Magnetic field or B.Electric field? which
4 answers
asked by
Katie
1,100 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
1,055 views
When you double the amount of coffee, you also double the _______________.
a thermal energy b neither is doubled c temperature
4 answers
asked by
AskQues
317 views
The diagram shows the result when a student placed a magnet under a piece of paper, then sprinkled iron shavings on the paper.
Th
3 answers
asked by
dreg
224 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
633 views
A Styrofoam bucket of negligible mass contains 1.75 kg of water and 0.450 kg of ice. More ice, from a refrigerator at -15.0
3 answers
asked by
Marthin
1,198 views
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