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A spring 20cm long is stretched to 25cm by a load of 50N.What will be its length when stretched by 100N assuming that the
33 answers
asked by
Bamiduro
21,824 views
A 61-kg skier, coasting down a hill that is an angle of 23 to the horizontal, experiences a force of kinetic friction of
5 answers
asked by
Tristan
4,102 views
Consider the equation
v = (1/4)zxt^2. The dimensions of the variables v, x, and t are [L]/[T], [L], and [T], respectively. The
5 answers
asked by
isalbelle
7,087 views
A car is slowing down at a rate of 20 km/h/s. How far does it travel if its original velocity is 50 km/h and its final velocity
5 answers
asked by
Anonymous
1,401 views
A stretched spring stores an energy of 25joules when its is extended by 6.7*10-2m. Calculate it force contant
6 answers
asked by
Gali
1,222 views
Find the density of an object which is 8500g and 5000cm^3
1 answer
asked by
Mike
96 views
A massless rope is wrapped around a hollow cylinder of radius 23 cm whose central axis is fixed in a horizontal position. A mass
4 answers
asked by
Anonymous
1,980 views
A ceiling fan is rotating at 0.50 rev/s. When turned off, it slows uniformly to a stop in 11 s.
(a) How many revolutions does it
6 answers
asked by
Anonymous
3,529 views
A meter rule is balanced horizontally on a mass of 30kg hung 20cm from one end. If the position of the knife edge is 18cm from
5 answers
asked by
Maryann
1,618 views
Two reasons why displacement method is not suitable when determining the volume of a charcoal?
5 answers
asked by
Michael
2,817 views
A body vibrate in s.h.m with a frequency of 50Hz and a mplitude of 4cm.find the period,the acceleration at the middle and at the
7 answers
asked by
Anonymous
2,120 views
An airplane flew 1000km in 4h. What was the airplanes speed?
5 answers
asked by
Brionna
2,465 views
A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms
4 answers
asked by
Allen
3,684 views
A uniform plank of length 3 m is supported by two wooden trestles L and M as shown in the diagram above. L exerts a force of 80n
4 answers
asked by
juanita
1,064 views
A ball of mass 200g, travelling with a velocity of 100m/s, collides with another ball of mass 800g, moving at 50m/s in thesame
7 answers
asked by
Yakubu Samuel
1,767 views
An object 7.5cm light is placed 30 cm from aconcave mirror of curvature 20cm calculate the 1image distance 2image height
4 answers
asked by
Yusuf aliyu
810 views
A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?
4 answers
asked by
Allen
3,683 views
A girls walks 12m northwards 5m eastwards and 7m southwards her total displacement is?
5 answers
asked by
Gift
2,357 views
A 20g bullet moving at 200ms hit a bag of sand and comes to rest in 0.011 s what is the momentum of the bullet just before
14 answers
asked by
Anonymous
3,320 views
A brass measuring rule is correct at 15degree celcius the volume obtained where the length of an object is measured with rule at
4 answers
asked by
Sadiya
174 views
A violin string has a standard length of 32.8 cm. It sounds the musical note A (440Hz) when played without fingering.
How far
5 answers
asked by
K.
5,798 views
For a given machine the load moves 2 m when the effort moves 8m,if an effort of 20 N is used to raise a load of 60N, what is the
4 answers
asked by
Alex
1,036 views
A 65 kg dancer leaps .32 m high.
a) With what momentum does the dancer reach the ground? b) What impulse is needed to make a
5 answers
asked by
Einstein
2,264 views
A racing car starting from a standstill can reach a speed of 320 km/h in 6.50 s by exerting an average horizontal force of 1.52
4 answers
asked by
Lauren
698 views
Distinguish between real and apparent cubic expansivity of a liquid.A glass bottle full of Mercury has mass 500g an being heated
4 answers
asked by
Mamshep Joseph Ponmwa
1,774 views
1. Water at a pressure of 3.00 x 10 5th Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to
7 answers
asked by
Leo
8,821 views
The figure below shows a block of mass m resting on a 20¡ã slope. The block has coefficients of friction ¦Ìs = 0.73 and
4 answers
asked by
Jason
3,441 views
A car is driven at a constant speed of 21m/s down a road.the car engine delivers 48 kw of power.Calculate the force of friction
4 answers
asked by
Joveal
1,221 views
When taking a penalty kick a footballer applies a force of 30N for a period of 0.05s if the mass of the ball is 0.075kg,
4 answers
asked by
Haneef
1,042 views
A hockey puck leaves a player's stick with a speed of 8.60 and slides 38.0 before coming to rest. Find the coefficient of
5 answers
asked by
Andrea
2,710 views
A flywheel rotates with an angular speed of 26 rev/s. As it is brought to rest with a constant acceleration, it turns 55 rev.
Wha
3 answers
asked by
Maria
1,543 views
A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The
6 answers
asked by
Don
18,886 views
A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, he decides
4 answers
asked by
TJ
1,713 views
A grenade that is falling vertically explodes into two equal fragments when it is at a height of 2000 m and has a downward
4 answers
asked by
kevin
1,122 views
A river 1.00 mile wide flows with a constant speed of 1.00 mi/h. A woman leaves from a point on the river bank. The woman rows a
4 answers
asked by
Sue
1,681 views
A cyclist travel 2.5km east then 10.0km south and finally 5.0km west.Determine thecyclistcyclist's overall displacement from
4 answers
asked by
Anonymous
609 views
What is the period of revolution of a satellite with mass m that orbits the earth in a circular path of radius 7820 km (about
4 answers
asked by
Andrea
5,932 views
You walk 55 m to the north, then turn 60° to your right and walk another 46 m. How far are you from where you originally
7 answers
asked by
John Yi
11,493 views
Determine the mass flow rate of water through a pipe with a diameter of 3.3 cm when speed at which water travels through the
3 answers
asked by
tina
1,392 views
If a scuba diver fills his lungs to full capacity of 5.5LL when 8.2mm below the surface, to what volume would his lungs expand
4 answers
asked by
Anonymous
4,337 views
A standing wave is formed on a string for which three and one half wavelengths fit into the total length of the string, which is
3 answers
asked by
Anonymous
655 views
Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in
4 answers
asked by
Allen
5,776 views
Show that the function y(x,t) = X^2 + V^2t^2 is a solution of the general wave equation.
4 answers
asked by
Godwin
2,570 views
John carries a 200 N suitcase up three flights of stairs (a height of 10 m) and then pushes it with a horizontal force of 50 N
4 answers
asked by
Help me
2,907 views
A 2.0 kg box moves back and forth on a horizontal frictionless surface between two different springs with one 32 N/cm and the
3 answers
asked by
Corey
1,007 views
It takes a force of 1280 N to keep a 1500 kg car moving with constant speed up a slope of
5.000 . If the engine delivers 50.0hp
3 answers
asked by
Adib
1,493 views
A fugitive tries to hop on a freight train traveling at a constant speed of 5.2 m/s . Just as an empty box car passes him, the
4 answers
asked by
taha
2,931 views
The distance covered by accelerating body is
4 answers
asked by
Adaobi
323 views
A paticle executing simple harmonin motion have frequency 50hz and an armputide 8-0*10'3m calculate the maximum volcity of the
4 answers
asked by
Love isek
511 views
Two vectors 5n and 8n act at an angle 45 calculate the resultant
4 answers
asked by
Angel
887 views
A mass of 20g is released for a catapult whose rubber have been stretched through 4cm if the first constant of the rubber is
1 answer
asked by
Limy shark
159 views
A body of mass 58g is suspended at 20cm mark of a uniform rule the meter rule is adjusted on a pivot until it settles
4 answers
asked by
Amarachi
511 views
The relative density of steel is 7•8. (A)find the mass of solid stell cube of side 10cm. (B)what volume of stell has a
4 answers
asked by
Sumailah
125 views
The free-body diagram in the drawing shows the forces that act on a thin rod. The three forces are drawn to scale and lie in the
3 answers
asked by
Panda
1,628 views
what type of materials do people use as ohmic conductors?
thanks.
1 answer
asked by
Emma
370 views
a block was push by a constant 90N horizontal force, it moved 12 meters in 5 secs
1) what is the box's weight 2) how far more
1 answer
asked by
Mem
452 views
an someone please help me out on this...
An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac
2 answers
asked by
Ollie
595 views
Why do protons in a very large nucleus have a greater chance of flying apart by electrical repulsion?
3 answers
asked by
Will
988 views
What determines whether an object is a net emitter or a net absorber of radiant energy?
Wood is a better insulator than glass.
2 answers
asked by
Paige
1,014 views
A person in a dark room looking through a window can clearly see a person outside in the daylight, where as the person outside
3 answers
asked by
Nita
1,427 views
When a spring is fully extended is the kinetic energy high or low? Why?
1 answer
asked by
John
376 views
Given that the distance between the Earth and the Moon is d = 3.84 108 m, show
that a satellite located exactly in-between
2 answers
asked by
Jorge
623 views
Two boxes sit side-by-side on a smooth horizontal surface. The lighter box has a mass of 5.91 kg, the heavier box has a mass of
4 answers
asked by
Timothy Tran
1,148 views
A ball is thrown vertically upward with a speed of +12.0m/s.
A. how long the ball take to hit the ground after it reaches it
4 answers
asked by
Chan
895 views
A wave pulse travels along a string at a speed of 160cm/s. Note that part a is independent and refer to changes made to the
3 answers
asked by
Arooj
1,293 views
A 2.2 m-long string is fixed at both ends and tightened until the wave speed is 50 m/s. What is the frequency of the standing
4 answers
asked by
Danny
2,795 views
A fan at a rock concert is 30 m from the edge of the stage. The sound intensity level at the edge of the stage is 110 dB. The
4 answers
asked by
Jimmy
2,477 views
The back wall of an auditorium is 29.0 m from the stage. If you are seated in the middle row, how much time elapses between a
5 answers
asked by
Jimmy
1,505 views
What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open
7 answers
asked by
SB
538 views
31m/s is a typical highway speed for a car.
At what temperature do the molecules of nitrogen gas have an rms speed of 31 m/s?
3 answers
asked by
ana
443 views
7.7 mol of helium are in a 16 {\rm L} cylinder. The pressure gauge on the cylinder reads 65psi. What are (a) the temperature of
2 answers
asked by
ana
581 views
I am having trouble with some of this question.
'A student standing at the top of a cliff shoots an arrow from a height of 30.0 m
2 answers
asked by
Ahmad
747 views
Ok so this question was posted before but I'm confused by the answer. The problem is: The two masses (m1 = 5.0 kg and m2 = 3.0
2 answers
asked by
Kelsey
554 views
If a person jumps 8.59m horizontelly and jumps at 23 degrees, what is his initial velocity? Plz and thank you.
2 answers
asked by
Mike
501 views
Two softballs, each with a mass of 0.125 kg, are separated by a distance of 820 m in outer space.
a. If the balls are released
1 answer
asked by
Victoria
351 views
A particular comet has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 1010 m and moves
1 answer
asked by
Mary
424 views
A mass attached to a spring oscillates with a period of 3.15 s.
If the mass starts from rest at x = 0.0530 m and time t = 0,
4 answers
asked by
Tory
1,527 views
A person weighs 872 N in air and has a body fat percentage of 20.7%.
a. What is the overall density of this person's body? b.
3 answers
asked by
Ann
800 views
If you shout across a canyon and hear the echo 0.57 s later, how wide is the canyon?
4 answers
asked by
Lua
2,488 views
An unstretched spring is 11.0 cm long. When you hang an 590 g weight from it, it stretches to a length of 14.0 cm. what is the
4 answers
asked by
Andrea
2,020 views
A bowling ball weighing 71.2 N is attached to the ceiling by a 3.60 m rope. The ball is pulled to one side and released; it then
4 answers
asked by
Andrea
1,399 views
How many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at
4 answers
asked by
Andrea
833 views
Geophysicist have estimated that the temperature at the center of the earth’s core is 5000⁰C (or more), while the
2 answers
asked by
Paul
624 views
Brad uses a wheelchair to get in his house.which modification would make it easier for Brad to get in his house?
a)increase the
2 answers
asked by
Rose
472 views
It is possible to shoot an arrow at a speed as high as 121 m/s.
(a) If friction is neglected, how high would an arrow launched at
2 answers
asked by
Matt
595 views
A car starts from rest on a curve with a radius of 160 and accelerates at 1.40 . How many revolutions will the car have gone
1 answer
asked by
min
396 views
A car starts from rest on a curve with a radius of 160 and accelerates at 1.40 . How many revolutions will the car have gone
1 answer
asked by
min
463 views
A block moves up an incline of 45 inches at constant speed, because the action of a force of 15 N parallel to the incline. If
1 answer
asked by
Luz
939 views
A spherical concave mirroe has a radius =0.4m forms an image of a 0.2 m high object located 1m from the vertex of mirror. find
1 answer
asked by
mac
393 views
If the coefficient of static friction for tires on a road is 0.25, at what maximum speed can a car round a level 47.5 m radius
4 answers
asked by
Diana
2,938 views
two rocks of unequal mass have the same kinetic energy and are sliding across a flat, level ice surface in the same direction.
1 answer
asked by
Yeldos
364 views
A ball throw at 45 degree angle with an initial speed of 15m/s. the time for the ball to reach its highest point can be found
1 answer
asked by
Zach
453 views
How does doubling the mass of one object and tripling the distance between another object change the gravitational force betweem
1 answer
asked by
Help
487 views
Three balls are attached to a light rigid rod, as shown in the figure. A fulcrum is located at xf = 18.0 cm measured from the
1 answer
asked by
panda
1,174 views
an "extended object" is in balance when the center of mass is located directly over the fulcrum. By using a test mass mT placed
1 answer
asked by
panda
442 views
how does the M.A and the I.M.A of the inclined plane vary with the inclination angle?
1 answer
asked by
Vivian
316 views
Assume all temperatures to be exact.
An aluminum spoon at 84 degree C is placed in a Styrofoam cup containing 0.180 kg of water
1 answer
asked by
Alice
1,142 views
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.4 L in the warm store at 74
4 answers
asked by
Anonymous
603 views
If 0.045 kg of ice at 0 C is added to 0.390 kg of water at 34 C in a 0.150 kg aluminum calorimeter cup, what is the final
4 answers
asked by
Anonymous
742 views
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.4 L in the warm store at 74 F.
3 answers
asked by
Anonymous
490 views
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