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Physics
Page 71
Questions (147,195)
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
.
1,006 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
1,922 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
640 views
A polar satellite is launched at 850km above earth. Find orbital speed.
3 answers
asked by
Obaid
482 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
732 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
1,508 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
2,567 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
1,796 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
2,516 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
1,903 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
1,309 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
861 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
1,119 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
585 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
1,329 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
1,066 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
1,613 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
1,589 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
1,183 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
1,246 views
What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -39.0 nC?
3 answers
asked by
Justin
656 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
767 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
731 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
1,148 views
what is change of [potential energy as result of this move of how much work is done in raising a 35kg crate a distance of 1.5m
3 answers
asked by
lora
747 views
There is a legend of a Dutch boy who bravely held back the whole Atlantic Ocean by plugging a hole in a dike with his finger. Is
3 answers
asked by
please help me
1,268 views
If you lift the front wheel of a poorly maintained bicycle off the ground and then start it spinning at 0.72 {\rm rev}/{\rm s},
4 answers
asked by
Anonymous
1,680 views
A student throws a baseball vertically upward, and 2.8s later catches it at the same level. Neglecting air resistance ,
3 answers
asked by
Melissa
1,253 views
Which characteristic is constant for the car as it travels around the roundabout pictured below?
(1 point) Responses Position
7 answers
asked anonymously
190 views
a charge of + 2x10-7c is 10cm from a charge of -6x10-6c find magnitude and direction of force on each charge
4 answers
asked by
Carol
728 views
A football is kicked with an initial velocity of 25 m/s at an angle of 45 degrees with the horizontal . Determine the time of
4 answers
asked by
Allison
3,059 views
What is the longest wavelength for standing waves on a 238.0 cm long string that is fixed at both ends?
3 answers
asked by
Josh
589 views
Superwoman is hovering above the ground when a person free-falling goes by her at a terminal velocity of 140 km/h.
2 answers
asked by
Emily
982 views
4.80-kg watermelon is dropped (zero initial speed) from the roof of a 25.0-m-tall building. a) Calculate the work done by
3 answers
asked by
anton
2,062 views
An object moves with simple harmonic motion of amplitude A and period T. During one complete oscillation, for what length of
3 answers
asked by
Hamp
1,678 views
At the winter solstice, the power, in watts, received from the Sun on each square metre of Earth's surface can be modelled by
3 answers
asked by
Anonymous
1,018 views
Is it possible for the frictional force to increase the mechanical energy of a system? If so, give 2 examples with brief
3 answers
asked by
Sandhu
2,003 views
you drag a heavy box along a rough horizontal floor by a horizontal rope. Identify the reaction force to each of the following
2 answers
asked by
Sara
914 views
A 5.0-cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm. Find the location of the
4 answers
asked by
sophie
2,626 views
If 2.4 m^3 of a gas initially at STP is compressed to 1.6 m^3 and its temperature raised to 30 degrees C, what is the final
4 answers
asked by
Vern
1,423 views
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