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3. I have two identical dust particles. They are spheres with diameters of 0.0001 meter (about the same as a hair). They have
2 answers
asked by
sabrina
535 views
4. If the same two dust particles have -1.0 x 10-10 C of charge on one, and
+3.2 C x 10-10 C on the other, what is the force
1 answer
asked by
sabrina
436 views
Example: A disc of radius R has a uniform charge per unit area ċ. Calculate the electric field at a point P along the central
2 answers
asked by
azad
531 views
two point charges, Q1=-25microcoulomb and Q2=+50 microcoulomb, are separated by a distance of 12 cm. the electric field at the
4 answers
asked by
fara
2,054 views
examples of mechanicals waves
1 answer
asked by
peter
334 views
A small car with a mass of 950 kg travels northward at 30 m/sDoes the car have more or less momentum than a truck with a mass of
3 answers
asked by
Anonymous
559 views
The resistance of a copper wire of diameter 10mm and length 2m is 15 Ω. Determine the new resistance if
i) the length is doubled
2 answers
asked by
hans
528 views
A police car is travelling in a straight line with constant speed vp.A truck travelling in the same direction with speed 3/2 vp
1 answer
asked by
shaiz
825 views
indentify at least two ereas of physic involved in the following:
a) building a louder stereo system in your car b)bungee jumping
3 answers
asked by
nancy
1,153 views
A dynamite blast at a quarry launches a rock straight upward, and 2.0 s later it is rising at a rate of 15 m/s. Assuming air
3 answers
asked by
tish
1,077 views
If the work required to speed up a car from 13 km/h to 20 km/h is 6.5×103 J, what would be the work required to increase the
2 answers
asked by
paul
527 views
a mass 2.9kg object moving at a speed of 5.9m\s sticks a mass 0.88kg object initially at rest. immeditaly after the collision
2 answers
asked by
Anonymous
804 views
A 1.0-kg steel ball and a 2.0-m cord of negligible mass makeup a simple pendulum that can pivot without friction about thepoint
1 answer
asked by
Anonymous
634 views
anyone can suggest a method to determine specific heat of non-volatile liquids?
2 answers
asked by
yuss
475 views
A 120-kg box is loaded into the trunk of a car.
If the height of the car's bumper decreases by 20 cm , what is the force constant
4 answers
asked by
Randy
768 views
A skier traveling at 38.8 m/s encounters a 27.2 degree slope. If you could ignore friction, to the nearest meter, how far up the
3 answers
asked by
billy
904 views
A car is driven east for a distance of 44 km, then north for 25 km, and then in a direction 27° east of north for 28 km.
2 answers
asked by
keef lam
834 views
How much work does gravity do on a 0.0150kg ball falling from a height of 10.0m
3 answers
asked by
Anonymous
694 views
The amount of heat released when 100 grams of steam at 100 degrees Celsius
is converted into liquid water at 100 degrees Celsius
1 answer
asked by
bode
945 views
How long will a radio wave, with a wave length of 200 m takes to travel to and for the moon from the earth? (Distance of moon
2 answers
asked by
yumina
781 views
Two cubes with
sides of length 121.0 mm fit in a space that is 243.3 mm wide, as shown in the figure. One cube is made of
1 answer
asked by
Djef
331 views
Suppose 0.0150 kg of steam (at 100.00°C) is added to 0.150 kg of water (initially at 19.3°C.). The water is inside a copper
2 answers
asked by
help me please
663 views
can someone give me 5 examples for the conservation of the angular momentum , 5 for the conservation of the impulse , and 5 for
1 answer
asked by
auro
442 views
A steel rod of length 1.0000 m and cross-sectional area 3.63·10-4m2 is placed snugly against two immobile end points. The rod
2 answers
asked by
help me please
505 views
For a class demonstration, your physics instructor pours 1.16 kg of steam at 100.0°C over 4.69 kg of ice at 0.0°C and allows
2 answers
asked by
help me please
555 views
A copper sheet of thickness 2.01 mm is bonded to a steel sheet of thickness 1.07 mm. The outside surface of the copper sheet is
4 answers
asked by
help me please:-(( Urgetnt
691 views
I have a number of questions. please answer as many possible according your expertise.
1. i have seen for sale fossils of ginger
5 answers
asked by
ain
505 views
I have a number of questions. please answer as many possible according your expertise.
1. i have seen for sale fossils of ginger
3 answers
asked by
ain
842 views
The electrons in a metal that produce electric currents behave approximately as molecules of an ideal gas. The mass of an
1 answer
asked by
help me please:-(( Urgetnt
503 views
A diesel engine works at a high compression ratio to compress air until it reaches a temperature high enough to ignite the
1 answer
asked by
help me please Urgetnt
482 views
Find the net change in entropy when 259 g of water at 0.0°C is added to 259 g of water at 97.5°C.
1 answer
asked by
John
344 views
A Carnot engine takes an amount of heat QH = 113 J from a high-temperature reservoir at temperature TH = 1170°C, and exhausts
3 answers
asked by
John
500 views
Can someone give me 4 or 5 examples of the conservation of the impulse in sports and 4 or 5 examples of the conservation of the
1 answer
asked by
auro
356 views
A "seconds pendulum" is one that moves through its equilibrium position once each second. (The period of the pendulum is
4 answers
asked by
sisca
2,172 views
What mass of water at 22.0 °C must be allowed to come to thermal equilibrium with a 1.66-kg cube of aluminum initially at 1.50
2 answers
asked by
baby
586 views
A telephone cord is 6.20 m long and has a mass of 0.220 kg. A transverse pulse is produced by plucking one end of the taut cord.
1 answer
asked by
baby
466 views
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed
3 answers
asked by
sisca
2,875 views
In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. For example,
1 answer
asked by
sisca
702 views
You own a yacht which is 14.5 meters long. It is motoring down a canal at 10.1 m/s. Its bow (the front of the boat) is just
1 answer
asked by
coolstir
460 views
a baseball pitcher throws a baseball with a speed of 4m/s.Estimate the average acceleration of the ball during the throwing
7 answers
asked by
noah
982 views
Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is
5 answers
asked by
noah
10,334 views
Starting from rest, a car accelerates at 2.5 m/s^2 up a hill that is inclined 5.4 ^\circ above the horizontal.
how far the car
4 answers
asked by
Anonymous
5,431 views
Superman must stop a 120km/h train in 150m to keep it from hitting a stalled car on the tracks.If the train's mass is
3 answers
asked by
noah
998 views
A person stands on a bathroom scale in a motionless elevator begins to move,the scale briefly reads only 0.75 of th person
3 answers
asked by
noah
971 views
A ball is thrown straight up and returns to its starting point in 5 second. What is the initial speed of the ball?
1 answer
asked by
syida
408 views
The star nearest to our solar system is said to be 3.8 ly away. How many km. away is this if a spaceship can travel at the speed
2 answers
asked by
presalie
967 views
Lai was driving north on Hwy 75 with a speed of 56.9 m/s when she heard on a CB that a patrolman was hiding 127.3 m north of
1 answer
asked by
Shannon
291 views
Fernando tosses a ball upwards with an initial velocity of 12.0 m/s. What is in meters/second the velocity of the ball 4.5
2 answers
asked by
Jeon
595 views
A football is kicked stright up into the air it hits the ground in 4.6 sec later, what was the greatest height reached?
2 answers
asked by
Mack
482 views
A baby sitter pushing a stroller starts from
rest and accelerates uniformly at a rate of 0.511 m/s 2 . What is the velocity of
3 answers
asked by
Renee
619 views
The figure below shows a standing wave oscillating at 95 Hz on a string. The distance d between the two walls equals 70 cm. What
2 answers
asked by
Anonymous
690 views
principle area decreasing but pressure is increasing common daily using example
1 answer
asked by
joyna
247 views
use draw a force diagram of a crash - test dummy in a car at the moment of collision.for this proplem, assume that the forces
4 answers
asked by
nie
1,263 views
A 16 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun.
1 answer
asked by
kago
449 views
What hanging mass will stretch a 2.2-m-long, 0.40 - diameter steel wire by 1.1 ?
2 answers
asked by
roadking
658 views
A 1.20-{\rm kg} block of wood sits at the edge of a table, 0.720 m above the floor. A 1.20×10−2-{\rm kg} bullet moving
3 answers
asked by
chris
494 views
Average Speed
1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from
3 answers
asked by
ray
520 views
Block _____ Name ________________________________________ Date __________
Average Speed 1. In the 2008 Summer Olympics, Usain
2 answers
asked by
Anonymous
550 views
Before practicing his routine on the rings, a 67 kg gymnast hangs motionless, with one hand grasping each ring and his feet
1 answer
asked by
taylor
1,110 views
an object of mass 1.5 kg on a spring of force constant 600N/m loses 3% of its energy in each cycle.THE SYSTEM IS DRIVEn by a
1 answer
asked by
jjena
600 views
4. The physics class is having a tug of war – the men against the women. For a long time the two teams are pulling with equal
1 answer
asked by
aishah
472 views
Two people with a combined mass of 130 kg hop into an old car with worn-out shock absorbers. This causes the springs to compress
1 answer
asked by
shaz
635 views
A 0.500 kg sphere moving with a velocity (2.00 - 3.10 + 1.00) m/s strikes another sphere of mass 1.50 kg moving with a velocity
1 answer
asked by
carlton
1,186 views
An infinite uniformly-charged sheet with a = -2 x 10^-10 C/m2 occupies the yz plane.
A deuteron1 is created at a point on the +x
1 answer
asked by
jamii
372 views
adaobi walks 2km due west and 2km due south calculate the displacement of the girl
5 answers
asked by
tobey
1,644 views
if you are on a 29.2 degree slope and an avalanche started 236 m up the slope how much time would you have to get out of the way
4 answers
asked by
Anonymous
382 views
a ball of mass 1oog falls from a height of 5m onto a floor and rebounds to a height of 3m . what energy is lost as a result of
1 answer
asked by
antiah
381 views
a ball of mass 1oog falls from a height of 5m onto a floor and rebounds to a height of 3m . what energy is lost as a result of
1 answer
asked by
antiah
373 views
a ball of mass 1oog falls from a height of 5m onto a floor and rebounds to a height of 3m . what energy is lost as a result of
1 answer
asked by
antiah
380 views
a ball of mass 1oog falls from a height of 5m onto a floor and rebounds to a height of 3m . what energy is lost as a result of
1 answer
asked by
antiah
399 views
a ball of mass 1oog falls from a height of 5m onto a floor and rebounds to a height of 3m . what energy is lost as a result of
3 answers
asked by
antiah
456 views
a car sits still at a red light. once the light turns green, the driver accelerates at a rate of 3.5 m/s^2. how far has the car
2 answers
asked by
grissell
526 views
Two balls are conneted by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.81 kg and is held
2 answers
asked by
Anonymous
1,212 views
At which point between earth and sun, the intensity of the gravity field of the earth and sun are equal, if the mass of Earth is
1 answer
asked by
fjolla
395 views
Calculate the mass (in SI units) of a 150 lb human being.
m= (correct unit) Calculate the weight (in English units of a 2000 kg
1 answer
asked by
sam
357 views
what is thermometer
1 answer
asked by
shaka
304 views
if the beam current in a particular TV is 50 micro A and the charge on a single electron is 1.6x10^-19 C. how many electrons hit
1 answer
asked by
fatih
339 views
calculate the attractive force between earth and sun. Neglect the radii, D= 1.50X10
1 answer
asked by
Anonymous
340 views
A projectile is fired from the origin (at y = 0s m) a shown in the figure. The initial velocity components are v 0x = 940 m/s
2 answers
asked by
mark
631 views
A rowboat crosses a river with a velocity of 3.42 mi/h at an angle 62.5° north of west relative to the water. The river is
1 answer
asked by
jen
501 views
DR.BOB Help me!!!!!!!!!
The electric field at a distance of 0.4m from a point charge q is 20.0N/C. Find the charge “q"
1 answer
asked by
HELPPPPP!!
395 views
A force of 12 N acts on an object of mass 10kg and moves it with a constant velocity across a floor. What is the coefficient of
2 answers
asked by
Dee
803 views
A long straight horizontal wire carries a current = 3.90 A to the left. A positive 1.00 C charge moves to the right at a
3 answers
asked by
john
4,076 views
for an RLC ciruit, how are phase sifts other than plus or minus pi/2 possible?
1 answer
asked by
fatih
348 views
Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1820 N
2 answers
asked by
vickie
881 views
How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface?
1 answer
asked by
coleman
369 views
In an experiment, a mass m = 40 gm, attached to a string wrapped around the axle of a flywheel and starting from rest, falls
2 answers
asked by
ashley
873 views
a bullet is fired from the ground at the angle of 30 degree above the horizontal,What initial speed must the bullet have in
2 answers
asked by
aisya
575 views
A roller coaster car (390 kg) moves from A (5.00 m above the ground) to B (19.0 m above the ground). Two nonconservative forces
2 answers
asked by
cn
472 views
1 A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which
2 answers
asked by
mike
467 views
A 16 g piece of glass floats in bromoform (density = 2.89 g/ cm3) but sinks in bromobenzene (density = 1.52 g/ cm3), in which it
1 answer
asked by
Reem
470 views
a uniform meter stick of mass 100g is pivoted about the 30 cm mark. a mass of 200 g is placed at the 10 cm mark. where should a
2 answers
asked by
visoth
1,291 views
A dolphin jumps with an initial velocity of 13.0m/s at an angle of 41.0 ^\circ above the horizontal. The dolphin passes through
3 answers
asked by
aa
1,091 views
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 26m/s
3 answers
asked by
aa
499 views
A 1500 kg car moving at 10 m/s is stopped by the action of its brakes. The
work done by the car's brakes is ____ Joules.
3 answers
asked by
Anonymous
750 views
A grinding wheel of radius 0.280 m rotating on a frictionless axle is brought to rest by applying a constant friction force
3 answers
asked by
Anonymous
799 views
What is the electromagnetic flux coming from the surface of a 2000K blackbody? (You must show your work for full credit
1 answer
asked by
sONY
387 views
The figure shows a block P on top of another block Q. The two blocks are connected by a string which passes over a fixed smooth
2 answers
asked by
Anonymous
975 views
Given: Compressor speed is 1500rpm. The compressor has a bore of 3.125 in, a stroke of 3.26in and a connecting rod crank ratio
1 answer
asked by
zenden
690 views
A dog sled weighing 750 lb is pulled over level snow at a uniform speed by a dog team exerting a force of 60 lb. Find the
2 answers
asked by
Jennifer
733 views
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