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Physics
Page 71
Questions (147,474)
which electromagnet will produce the strongest magnetic force
3 answers
asked anonymously
399 views
In 1–2 sentences, explain how electromagnets move a maglev train.
4 answers
asked by
the real BARNY THE DINO :)
405 views
Use the information in the table about four different electric circuits to answer the question.
Circuit Resistance (ohms) Voltage
5 answers
asked anonymously
505 views
A ringing alarm clock is put under a glass jar. The air is slowly removed from the space around it. What will happen as the air
4 answers
asked by
wq
431 views
what happens when thermal energy is applied to an ice cube
its water molecule gain kinetic energy and move around more its water
3 answers
asked by
!
473 views
Which statement best describes the gravitational force of an object
the object has gravitational force when it is on the surface
3 answers
asked by
:)
230 views
A uniform have meter rule is freely pivoted at 15cm mark and it balances horizontal when a body of mass 40g is huge from the 2cm
3 answers
asked by
Aishah
101 views
Together, Claudia and her bicycle have a mass of 90 kg. What force is needed to give them an acceleration of 2 m/s²? Ignore the
2 answers
asked by
Anonymous
130 views
If a load of 100N is applied to a wire the extension is 1.2m calculate the energy stored in the wire
3 answers
asked by
Elizabeth
194 views
Describe the motion of a particle with position (x, y) as t varies in the given interval. (For each answer, enter an ordered
4 answers
asked by
garlic
362 views
study the motion of a particle of mass m in a central potential U(r) = γr^2 with
γ > 0. a) write the equations of motion in
3 answers
asked by
pete
432 views
An object has an excess of 50 electrons. What is the charge on the object in picocoulomb?
4 answers
asked by
Anonymous
633 views
Two point charges 5Nc & -2NC are located at (2,0,4) & (-3,0,5) respectively.
(a) Determine the force on 1Nc point charge located
3 answers
asked by
Amusire
700 views
If the linear expansivity of a copper rod is 1.7*10^_5_k^_1, calculate the expansion 10m of copper 50 of when heated from
3 answers
asked by
Sanda
376 views
An object has a mass of 100kg and a volume of 27cm3, what is its density? Will the object sink or float? How do you know?
An
3 answers
asked by
Shiona
435 views
How would the electrostatic force change if Coulomb's law included a negative sign?
It would depend on the magnitude of the
3 answers
asked by
Katy
1,452 views
A portion of the high-resolution emission spectrum of a one-electron atomic species is shown below. The highest energy series is
3 answers
asked by
caity
347 views
An ideal spring of negligible mass is 12.00cm long when nothing is attached to it .when you hang a 3.15kg weight from it , you
2 answers
asked by
Fred
996 views
A sign (including its post and base) weighs 40 pounds and is supported by an 18 in by 18 in square base. If the wind applies a
4 answers
asked by
.
1,007 views
A battery-operated DVD player uses 12 DC volts from AA batteries and draws a current of 3 A. Calculate the resistance.
4 answers
asked by
donavan
1,923 views
An astronaut on the moon drops a rock straight downward from a height of 0.95m. If the acceleration due to gravity on the moon
3 answers
asked by
Abigail
768 views
one mole of an ideal gas expanded isothermally and reversibly at temperature of 300k from 10 to 1 atmospheric (atm). Calculate
3 answers
asked by
SIMARKUS
559 views
A 50-g bullet with a speed of 10 m/s hits into a sandbag hanging from the ceiling and embeds into it. The sandbag is at rest
4 answers
asked by
Yonas
642 views
what is the general trend of the critical angle as the refractive index increases?
3 answers
asked by
T
813 views
An airplane from rest accelerates on a runway at 5.50 m/s² for 20:25 seconds until it finally takes off the ground. What is the
2 answers
asked by
Nikolei
759 views
When a butterfly lands 12 cm from a concave mirror, it's image is 18 cm behind the mirror.
Find the focal length
4 answers
asked by
Kayla
735 views
How much heat is required to raise the temperature of 25g of aluminum from 25.0 C to 100 C?
Convert this value to joules?
3 answers
asked by
Santiago
1,510 views
The car is traveling at a speed of 60 mi/hr as it approaches point A. Beginning at A, the car decelerates at a constant 7ft/sec2
4 answers
asked by
Anonymous
2,570 views
a woman is draining her fish tank by siphoning the water into an outdoor drain the rectangular tank has footprint area A and
3 answers
asked by
momen
1,798 views
Find the resultant in magnitude and direction of forces 10N, 20N, 30N, 40N, acting respectively in the direction 60,120,180 and
4 answers
asked by
Shade
2,520 views
a body projected vertically up from ground crosses a point Pafter 4 seconds and again after 6 seconds Maximum height reached by
4 answers
asked by
devi
1,904 views
Briefly describe the relative quantities of kinetic, gravitational potential and mechanical energy as a stone is thrown in the
4 answers
asked by
John
1,310 views
A bullet is fired horizontally from the top of a cliff with a speed of 30m/s.assuming that there is no air resistance, what will
3 answers
asked by
Emmanuel
863 views
What's kinetic energy in electron volt of a triply ion iron which has been accelerated from rest through a potential difference
2 answers
asked by
abdalla
1,120 views
what about a 5,000 kg truck rear-ends a 1200 kg car that has been traveling at 13 m/s, causing the truck to slow down from 14
5 answers
asked by
Angie
2,681 views
Two equal sphere each weighting 1g hang by 2 equal silk thread from the same point the sphere are charged with in Contact and
5 answers
asked by
kritika
1,263 views
2. For an object whose velocity in ft/sec is given by v(t) = -t^2 + 6, what is its displacement, in feet, on the interval t = 0
4 answers
asked by
Vikram
1,682 views
On a frozen pond, a 11.7 kg sled is given a kick that imparts to it an initial speed of v0 = 2.01 m/s. The coefficient of
2 answers
asked by
Anonymous
586 views
a plane is heading 60 degrees east of south at 180 km/hr. a 50 km/hr wind blows in the direction of 25 degrees west of south.
3 answers
asked by
anon
1,331 views
Three capacitors are connected to a battery of unknown
voltage as shown in the circuit diagram above. The voltage drop across
4 answers
asked by
selina
1,199 views
A ball sitting on the top of a table has potential energy but no kinetic energy.
How do potential and kinetic energy change as
3 answers
asked by
Sabina
1,067 views
Two point charges of +1.0 uC and -2.0 uC are located 0.50 m apart. What is the minimum amount of work needed to move the charges
3 answers
asked by
George
1,614 views
A pendulum consists of a 2.1 kg stone swinging on a 3.6 m string of negligible mass. The stone has a speed of 7.9 m/s when it
3 answers
asked by
Jake
585 views
A stretched wire 75cm long emits a fundamental frequency of 300Hz.By how much the length be changed so that it emits a
4 answers
asked by
geofrey
1,592 views
A tray held horizontally by a waiter. The tray has a weight of 6N and supports a drink of weight 3N. The waiter provides a force
3 answers
asked by
Sharda
1,186 views
calculate the mass of air in a room measuring 5m*8m*10m if the density of air is 1.3kg/m cube
4 answers
asked by
daniel
1,247 views
264.6 g of water is in a Styrofoam calorimeter of negligible heat capacity. The initial T of the water is 16.9oC. After 270.9 g
5 answers
asked by
Anonymous
768 views
Work it out. How many joules of heat is given out when pieces of iron of mass 50g and specific heat capacity =460kgk cools from
6 answers
asked by
Peter
734 views
A hypodermic needle is 2.98 cm in length and 0.28 mm in diameter. What pressure difference between the input and output of the
3 answers
asked by
britt
818 views
A cylinder with a movable piston contains 2.00g of helium,He, at room temperature. More helium was added to the cylinder and the
3 answers
asked by
Kim
1,150 views
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