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Physics
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Questions (147,581)
How much heat, in kilojoules (kJ), is required to raise the temperature of 2.50kg Hg(l) from -20.0 to -6.0C? Assume a density of
6 answers
asked by
Bob
4,464 views
the diagram show the position of a skydiver over the past 5 sec of her descent time.
0 1 20 ft every second 2 3 4 5 drag a label
4 answers
asked by
herman
1,189 views
The radius of the Earth is approximately 6000 km. The acceleration of an astronaut in a perfectly circular orbit 300 km above
7 answers
asked by
Hannah
6,199 views
A simple pendulem is made from a bob of mass 0.040 kg suspended on a light string of length 1.4 m.keeping taut,the pendulemis
4 answers
asked by
Abdu
1,178 views
A plane head north with an airspeed of 420 km/h. However, relative to the ground, it travels in a direction 7.0 west of north.
5 answers
asked by
JHM
3,304 views
Assuming atmospheric pressure to be 1.01 x 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure
5 answers
asked by
N.
4,372 views
Determine the specific heat of iron if 6.1 J of energy are needed to warm 1.50 g of iron from 20 degrees C to 29 degrees C
5 answers
asked by
Anonymous
2,193 views
A vehicle travelling 30mph collides head-on with another vehicle travelling 50mph, the force of impact, theoretically, would be
4 answers
asked by
Alisa
1,399 views
A bungee jumper of mass 60 kg jumps from a bridge tied to an elastic rope which becomes taut after he falls 10 m. Consider the
7 answers
asked by
anon
2,627 views
What is the time constant of a 10 H inductor and a 200 ohm resistor connected in series? Is my work correct? I did: T= L/R = 10
4 answers
asked by
Brett
3,088 views
a string supports a solid iron object of mass 180g totally immersed in liquid of density 800kg/m3. calculate the tension in the
7 answers
asked by
joelinho
4,166 views
. A sonar signal is sent from a ship and the signal returns from the bottom 3.65 s later. How deep is the ocean if the speed of
4 answers
asked by
Benji
3,289 views
A rifle is aimed directly at the bull's eye of a target 50m away. If the bullet's speed is 350 m/s, how far below the bull's eye
5 answers
asked by
Tracy
5,403 views
By how much will the temperature of 2.00kg of air change if it absorbs all of the heat given up when 1.00kg of water cools from
4 answers
asked by
Saarah
849 views
A gas at 65 degrees Celsius occupies 4.22L. At what Celsius temperature will the volume 3.87L, assuming the same pressure?
-kay
7 answers
asked by
kLb
9,283 views
In the figure below the left hand calbe has a tension T1 and makes an angle of 42 with the horizontal. the right hand calbe as a
4 answers
asked by
Josh
2,326 views
A 52kg ice hockey player moving at 11m/s slows down and stops over a displacement os 8.0m.
Calculate the net force of the skater.
6 answers
asked by
Mike
2,942 views
A spiral spring stretches 4 cm when a mass of 0.5 kg is suspended from it. what is the spring constant?
4 answers
asked by
jamal
2,226 views
At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75g particle has a velocity
4 answers
asked by
ATT
1,811 views
A bead slides without friction around a loopthe-loop.
The bead is released from a height of 18.9 m from the bottom of the
4 answers
asked by
monica :)
2,699 views
a car has wheel of 30cm radius. it starts from rest and accelerates uniformly to a speed of 15 m/s in a time of 8s. find the
4 answers
asked by
Anonymous
3,535 views
an empty rubber balloon has mass 0.0120kg, the balloon is filled with helium of density 0.181 kg/m^3. the balloon is spherical
5 answers
asked by
Helen
3,029 views
Iron has a heat capacity of 0.45 J/g/◦C. If a
100 g sample of iron at an initial temperature of 50◦C absorbs 400 J of energy,
4 answers
asked by
Sammy
682 views
A 250N force is applied at an angle of 32 degrees above the horizontal to a 96kg box causing it to slide along a floor. The
4 answers
asked by
Julia
2,170 views
A ball is hit from horizontal ground with velocity (10i+24.5j) ms-1 where the unit vectors i and j are horizontal and vertically
5 answers
asked by
0oooooooo0
2,107 views
A pendulum bob has a mass of 1kg. The length of the pendulum is 2m. The bob is pulled to one side to an angle of 10degree from
18 answers
asked by
Sam
5,741 views
In a television picture tube, electrons are accelerated by an electric field having a value of 1*10^5 N/C. Find the force on an
4 answers
asked by
kailey
1,575 views
The efficiency of a machine is 60℅,find In joules the work done by a student using the machine to rise a load of 150kg through
7 answers
asked by
Lawrence
4,630 views
Aforce Of 4oN Is Used To Stretch Aspring Which Has Aspring Constant 350 N/m.How Much Energy Is Stored In The Spring?
7 answers
asked by
Exasu Amanuel
657 views
A boat crosses a river 1.5km wide in 15 mins.if the river flows at 2 km/h , calculate the velocity of the boat
6 answers
asked by
John
998 views
An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The
bullet remains lodged in the block.
7 answers
asked by
Georgey
10,875 views
An block of mass m , starting from rest, slides down an inclined plane of length L and angle θ with respect to the horizontal.
5 answers
asked by
Anonymous
1,948 views
Two springs are attached side by side to a green box of mass M. Determine an expression that describes the period of motion of
5 answers
asked by
Rose
5,123 views
An object is dropped from the observation deck of the Skylon Tower in Niagara Falls, Ontario. The distance, in metres, from the
5 answers
asked by
Melinda
1,990 views
A Spring streches by 6 cm when supporting a load of 15 N.How much would it stretch when supporting a load of 5 kg
7 answers
asked by
Norah
1,335 views
A stone of mass 20g is release from a catapult whose rubber has been stretched through 4cm, if the force constant of the rubber
12 answers
asked by
Justice
5,548 views
The volume, V, of an object is given as a function of time by
equation Where t, is time. Assuming that the equation is
5 answers
asked by
junior
1,650 views
Two ice skaters stand facing each other at rest on a frozen pond. They push off against one another and the 48-kg skater
4 answers
asked by
mathew
9,306 views
A bathysphere used for deep sea exploration has a radius of 1.50 m and a mass of 1.20 × 104 kg. In order to dive, the sphere
4 answers
asked by
Sydney
4,760 views
a thimble is 32.0 cm from a spherical concave mirror. The focal point lenght of the mirror is 11.0 cm. What is the image
4 answers
asked by
Luis
2,756 views
A man who weighs 600 N is sitting in a chair with his feet on the floor and arms resting on the armrests. The chair weighs 100
5 answers
asked by
K
1,544 views
A dike in Holland springs a leak through a hole of area 0.80 cm2 at a depth of 1.2 m below the water surface.
How much force must
4 answers
asked by
dave
6,687 views
In searching the bottom of a
pool at night, a watchman shines a narrow beam of light from his flashlight, 1.3 m above the water
4 answers
asked by
Steve
5,053 views
Take into account the Earth's rotational speed (1 rev/day) and determine the necessary speed, with respect to the Earth, for a
4 answers
asked by
Steve
2,199 views
A screw jack has 90 threads tothe metre. the effort is applied at the end of an arm 20cm long whatforce must be applied to lift
7 answers
asked by
JOHN
1,490 views
a ball was thrown vertically upward from the ground and reaches a height of 50 meters. a) with what speed was it thrown?
b) how
4 answers
asked by
sandra
1,371 views
calculate the weight of a stone of mass 10 kg and density 10000kg/m³ when it is totally immersed in water
5 answers
asked by
abdul
1,516 views
A 1.00kg ball and a 2.00kg ball are connected by a 4.63m long rigid, massless rod. The rod is rotating clockwise about its
4 answers
asked by
Syed
5,209 views
a ball is released from rest and rolls down in an inclined plane, requiring 4 sec. to cover a certain distance of 100m. a) what
6 answers
asked by
Andrea
3,796 views
2) A child sits on a merry-go-round, 1.5 meters from the center. The merry-go-round is turning at a constant rate, and the child
5 answers
asked by
Anonymous
5,560 views
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