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physic
Page 5
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During fair weather, an electric field of about 100 N/C points vertically downward into the earth's atmosphere. Assuming that
1 answer
asked by
julone
719 views
Which of these is not a statement of newton's law of universal gravitation?
2 answers
asked by
femi
558 views
Pere walked 4km east and 6km south.find the resultant displacement
1 answer
asked by
Anonymous
452 views
Pere walked 4km east and 6km south.find the resultant displacement
1 answer
asked by
oye
387 views
Pere walked 4km east and 6km south.find the resultant displacement
1 answer
asked by
oye
402 views
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 69 kg and exert average
2 answers
asked by
tina
518 views
A boat has a mass of 4010 kg. Its engines generate a drive force of 3580 N due west, while the wind exerts a force of 660 N due
2 answers
asked by
Anonymous
611 views
four forces act on a point 2N.2N.2N.4N determine the equilibrant of the four forces
1 answer
asked by
nomfundo
442 views
The concorde is the fastest airliner used for commercial service. It can cruise at 1450mi/hr. What is the cruise speed of the
1 answer
asked by
helen
449 views
A cheetah is crouched in ambush 20m to the east of an observers blind. At time t=0 the cheetah charges an aeroplane in a
3 answers
asked by
helen
1,204 views
Vector a magnitue of 7units and 45° .vector B has a magnitue of 10unit ant an angle of45°
.what is a A+B
1 answer
asked by
rodney
362 views
A rubber ball dropped from a height of exactly 6 ft bounces several times on the floor, loosing 10% of its kinetic energy each
2 answers
asked by
muhammad fahad rafi
993 views
A 47.5-g golf ball is driven from the tee with an initial speed of 41.8 m/s and rises to a height of 34.5 m. (a) Neglect air
2 answers
asked by
Anonymous
614 views
A box of mass 2 Kg lies on a rough horizontal floor with the coefficient of friction between the floor and the box being 0.5
1 answer
asked by
zainab
851 views
The sports car in Figure 6 is travelling along 30 banked road having a radius of curvature of ñ=152 m. If the coefficient of
4 answers
asked by
zainab
1,302 views
A stationary 2.0 kg object is located on a table near the surface of the earth. The coefficient static friction between the
2 answers
asked by
pam
750 views
A 69-cm-diameter wheel accelerates uniformly about its center from 150rpm to 320rpm in 4.4s . Determine angular acceleration?
3 answers
asked by
Charles
775 views
why is it physically reasonable to expect that two identical parallel plate capacitors that are placed in series ought to have
3 answers
asked by
ikine2
530 views
Physicists claim that charge never flows through an ideal capacitor. Yet when an uncharged capacitor is first placed in series
2 answers
asked by
suleri
535 views
How much energy is required to change a 40 g ice cube from ice at -25°C to steam at 105°C?
3 answers
asked by
Renee
940 views
If wind blows at 34m/s over a house, what is the net force on the roof if its area is 170m2 and is flat? (At 20 ∘ C dry air
1 answer
asked by
Charles
611 views
how many kcal of heat must be withdrawn from 4.56 kg of steam at 125 degrees C to change it to ice at -44.5 degrees C???
1 answer
asked by
nick
435 views
What is the angle of refraction if a light wave traveling through air hits th surface of water at 25 degree?
1 answer
asked by
ai
409 views
A 5.0-kg object is supported by an aluminum wire of length 2.1m and diameter 1.7mm .
Part A How much will the wire stretch?
1 answer
asked by
bety
506 views
A dielectric-filled parallel-plate capacitor has plate area A = 10.0cm2 , plate separation d = 7.00mm and dielectric constant k
1 answer
asked by
asasa
945 views
If it takes 2.45 min to fill a 24.5 L bucket with water flowing from a garden hose of diameter 2.70 cm, determine the speed at
2 answers
asked by
tina
690 views
In a serious accident, a nuclear power plant's reactor vessel cracks, and all of the cooling water drains out. Although nuclear
2 answers
asked by
joseph
733 views
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. What is area of cross section of
4 answers
asked by
abc
1,357 views
a 2.00kg object A is connected with a massless string across a massless, frictionless pulley to a 3.00kg object B. the smaller
3 answers
asked by
EMMA
1,501 views
Find the force a 67.5 kg man would experience while standing in the surface of each of the following planets
PLANET 1. EARTH 2.
7 answers
asked by
Dulce
2,543 views
a stone A is dropped from the top of tower and B is thrown downward from same point 2 seconds later with initial velocity of 30
2 answers
asked by
Apoorva
897 views
an engine pumps out 40 kg of water in one rawnd the water comes out vertically upward with a velocity of 3m/s what is the power
5 answers
asked by
ashish
860 views
A different scaffold that weighs 500N supports two painters, one 500 N and the other 500N . The reading in the left scale is
1 answer
asked by
Anonymous
494 views
A different scaffold that weighs 500N supports two painters, one 500 N and the other 500N . The reading in the left scale is
1 answer
asked by
Anonymous
1,057 views
a car travels east at 89 km/h for 1 hour.it then travels 26 east of north at 141 km/h for another 1 hour.
a)what is the average
2 answers
asked by
siti
854 views
A 22.2 kg mass attached to a spring scale rests on a smooth, horizontal surface. The spring scale, attached to the front end of
2 answers
asked by
Anonymous
589 views
what would the reading on the scale if the boxcar were moving at a constant velcity
1 answer
asked by
Anonymous
413 views
Predict the horizontal distance a cannon on a 15 m cliff will shoot if it's initial velocity is 140 m/s and it's inclined at 15
3 answers
asked by
jason
466 views
Pressing the brake of a car causes it to slow down from 29 m/s at a rate of -2.0 m/s2 for a period of 4 s. How far did the car
1 answer
asked by
samiboo711
432 views
The distance between London and Madrid is 1273 km. If an airplane travels at an average velocity of 502.4 km/h, how long will
1 answer
asked by
samiboo711
347 views
an elevator is accelerating downward at 3.5 m/s^2. A person standing inside releases a coin from 2 m above the floor.
(a)how long
2 answers
asked by
Anonymous
728 views
The distance between two nearest nodes of
a standing wave is 16.3 cm. Hand generated pulses move up and down through a complete
1 answer
asked by
Anonymous
497 views
A stone drop from the edge of the roof of a multistoried building. Calculate the teme taken by the pot cross to a particular
1 answer
asked by
Anonymous
415 views
calculate the electric force between the two charged particles q1=4c and q2=6c the distance between these charges is 9 m
2 answers
asked by
rahul vijay
507 views
As discussed in Example 4-7, the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of
2 answers
asked by
Dina
568 views
A long jumper leaves the ground at an angle of 22.7◦ to the horizontal and at a speed of 9.47 m/s.
How far does he jump? The
1 answer
asked by
Anonymous
698 views
Two boxes are connected by by a massless string over a massless, frictionless pulley. Box 1 has a mass
of m1 = 15.0 kg and is
1 answer
asked by
Elvis
1,073 views
A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant
of k = 500 N/m. The box is pushed down 30.0 cm
1 answer
asked by
Elvis
455 views
A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant
of k = 500 N/m. The box is pushed down 30.0 cm
1 answer
asked by
Elvis
455 views
Two boxes are connected by by a massless string over a massless, frictionless pulley. Box 1 has a mass
of m1 = 15.0 kg and is
1 answer
asked by
Elvis
1,040 views
what is the internal energy chane of 500g of molten lead as it solidifies at its melting temperature? Neglect its small volume
1 answer
asked by
wesailat mohammed
412 views
A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge
4 answers
asked by
sara
1,465 views
A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge
1 answer
asked by
sara
474 views
A car starts from rest on a curve with a radius of 150m and tangential acceleration of 1.0m/s2 .
Through what angle will the car
1 answer
asked by
joshwa
590 views
A car starts from rest on a curve with a radius of 150m and tangential acceleration of 1.0m/s2 .
Through what angle will the car
2 answers
asked by
joshwa
560 views
A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge
1 answer
asked by
emily
500 views
After pushing a 22.2 kg kid and tricycle over 10.3 m of smooth, level sidewalk from rest, the "combo" is moving at 3.0 m/s. Find
2 answers
asked by
sorry
564 views
a footbal is thrown at an angle of 35 reltive to the ground at a speed of 25m/s. the football is then caught 38m from the
2 answers
asked by
Anonymous
476 views
An object of mass m is at rest at the top of a smooth slope of height h and length L. The coefficient of kinetic friction
4 answers
asked by
physic ----please help
4,795 views
A pig slides down a 29° incline in twice the time it would take to slide down a frictionless 29° incline. What is the
3 answers
asked by
Dina
882 views
A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing
3 answers
asked by
femi
953 views
A cannon ball is fired at an angle of 30° above horizontal with an initial speed vi = 55 m/s. Assume the cannon ball leaves the
3 answers
asked by
Nicolas
1,530 views
A 7.28-kilogram bowling ball traveling 8.50 meters per second east collides head-on with a
5.45 kilogram bowling ball traveling
5 answers
asked by
natsu
2,317 views
. A 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. How many kilowatts of power
is needed for the job?
3 answers
asked by
wellington
468 views
A 475 kg pre-stressed concrete beam is to be raised 10.0 m in 24.0 s. How many kilowatts of power
is needed for the job?
4 answers
asked by
wellington
397 views
A hammer falls from a scaffold on a building 50.0 m above the ground. Find its speed as it hits the
ground.
2 answers
asked by
wellington
488 views
Eight people are involved in a tug-of-war. The blue team members pull the rope with the forces of
220 N, 340 N, 180 N, and 560 N.
4 answers
asked by
wellington
738 views
8. A torque wrench reads 25 lb ft.
a. If its length is 1.0 ft, what force is being applied to the wrench? b. What is the force if
3 answers
asked by
wellington
440 views
A 1250 kg wrecking ball is lifted to a height of 12.7 m above its resting point. When the wrecking ball
is released, it swings
2 answers
asked by
wellington
597 views
Please help
how much heat is needed to transform a 2.5 kg block of ice at -4°c to a puddle of water at 12°c? Cwater=4200J kg^-1
1 answer
asked by
wai
447 views
A force paralled to an inclined plane is used to raise a load of 500N through a height of 3M While the load moves a distance of
2 answers
asked by
compbell
1,003 views
How did kinetic energy and potential energy compare to the total energy during the
motion without friction? What about when
1 answer
asked by
wellington
378 views
Find the average speed of an automobile that travels 160 km in 2.0 h.
2 answers
asked by
wellington
673 views
4. A car accelerates at 0.5 m/s2 starting from rest.
a. After 4 s what is its velocity? b. After 4 s, how far has it traveled
2 answers
asked by
Anonymous
545 views
A wheel on a moving car slows uniformly from 420 rpm to 120 rpm in 4 sec.
A. What is the angular acceleration of the wheel? B.
2 answers
asked by
piggy
766 views
A 0.25-kg punk, Initially at rest on a frictionless horizontal surface, is struck by a 0.20kg punk that is initially moving
3 answers
asked by
piggy
512 views
A 25 gm bullet is fired into a 2.25kg ballistic pendulum and becomes embedded in it. If the pendulum moves a vertical distance
1 answer
asked by
piggy
503 views
A student stands on a rotating disk holding 4-kg objects with each hand. hen his arms are extended horizontally, the object are
1 answer
asked by
piggy
603 views
A 0.25-kg punk, Initially at rest on a frictionless horizontal surface, is struck by a 0.20kg punk that is initially moving
1 answer
asked by
sam
466 views
A 25 gm bullet is fired into a 2.25kg ballistic pendulum and becomes embedded in it. If the pendulum moves a vertical distance
1 answer
asked by
sam
452 views
A student stands on a rotating disk holding 4-kg objects with each hand. hen his arms are extended horizontally, the object are
2 answers
asked by
sam
555 views
a projectile is fired from the ground level with a velocity of 500ms at 30 degree to the horizontal. Determine 1 it's horizontal
2 answers
asked by
babagana
487 views
Question Part
Points Submissions Used A hypodermic syringe contains a medicine with the density of water (figure below). The
2 answers
asked by
sam
696 views
What is difference between cohessive and adhessive force
1 answer
asked by
rajeev
350 views
A man pushes a wooden box across the floor at a constant speed of 0.5 m/s by applying a horizontal force of 200N. Wht is the
2 answers
asked by
sheriff
625 views
A 1019kg shark is supported by an 85kg rope attached to a 4.00-m rod that can pivot at the base.
(a) Calculate the tension in the
3 answers
asked by
miran
469 views
if you have a intial object going 1m/s to the right then after 1.2seconds its going 0.5m/s to the left.
whats is the constant
1 answer
asked by
john
281 views
A 7kg box sled is coasting across frictionless ice at speed of 9 m/s when a 9kg package is dropped into it from above. what is
2 answers
asked by
Nithiya
533 views
A 1.2-kilogram basketball travelling at 7.5 meters per second hits the back of a 12-kilogram wagon and bounces off a 3.8 meters
4 answers
asked by
Anonymous
1,434 views
Suppose a runner completes one lap around a 400-m track in a time of 50 s. Calculate the average speed of the runner.
please
3 answers
asked by
rachel
1,210 views
A projectile is launched from the ground at 34.8 m/s at an angle of 44.5 degrees above the horizontal. How long, in seconds,
1 answer
asked by
elle
467 views
A ball is dropped from the top of an apartment building. A person is on a patio somewhere beneath the top of the apartment
2 answers
asked by
elle
585 views
A baseball is hit from home plate and it winds up in the stands as a homerun. From the point it was hit, it lands a horizontal
2 answers
asked by
elle
658 views
A swing ride at a carnival consists of chairs that are swung in a circle by 11.0-m cables attached to a vertical rotating pole,
2 answers
asked by
john bear
791 views
A rock is thrown upward from the level ground in such a way that the
maximum height of its flight is equal to its horizontal
1 answer
asked by
giz
762 views
Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around
3 answers
asked by
jose
1,003 views
In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire
1 answer
asked by
andrea
700 views
vander waal b for oxygen is 32 cm3/mol compute the diameter of o2 molecule
1 answer
asked by
abdulmueed
322 views
The thickness of a book is 3.2cm, measured between the insides of it cover. The highest page in the book is 1,096. What order of
2 answers
asked by
Mary
927 views
a mass of 3kg rest on horizontal plane. the plane gradually inclined until at a angel 0=20 degrees with the horizontal, the mass
1 answer
asked by
812 views
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