Questions LLC
Login
or
Sign Up
Ask a New Question
Categories
physics
Questions
do vectors have an x component of zero?
4 answers
asked by
k
4,293 views
A car starts from rest and travels for 5.0 s with a uniform acceleration of + 1.5 m/s2. The driver then applies the brakes,
5 answers
asked by
sebastian
12,817 views
The range of a Cannon ball fired horizontally from a laboratory table equals to 8/ 3 times the height of the table . what is the
7 answers
asked by
Elisabeth
1,913 views
If a force of 100n stretches a spring by 0.1cm. Find
(A) the elastic constant (B) the work done in stretching the spring 0.3cm if
5 answers
asked by
Gabriel
1,624 views
A spring is stretched 40mm by force 15N, what is the work done by the force
9 answers
asked by
Issa
5,354 views
the relative density of steel is 7.8, find the mass of a solid steel cube of side 10cm
29 answers
asked by
Ayomide
2,083 views
Explain why you don’t need a displacement vs. distance graph for light, but you do for other traveling waves.
4 answers
asked by
rosalinda
2,347 views
A very large open tank is full of oil whose density is 800 kg/m3 . If the absolute pressure at the bottom of the tank is 1.81 x
5 answers
asked by
a
591 views
ne kilogram of ice of density 1000 kg m–3 is frozen in the shape of a cube. The diameter of a water molecule is 10–10 m.
5 answers
asked by
supercute
2,869 views
A 156 g hockey puck is initially travelling with a speed of 18 m/s. The force of friction acting on the puck is 0.30 N. If no
5 answers
asked by
sandra
1,837 views
The diagram below shows two identical balls A and B on a horizontal surface. Ball B is at rest and ball A is moving with speed V
4 answers
asked by
pleasehelp
1,781 views
find the change in electrical potential energy of an electron as it moves from a distance r1=1.0cm to r2=3.0cm from a point
1 answer
asked by
juliet
322 views
positively charged particle is fixed in place, unable to move. Another positively charged particle is brought near and released.
4 answers
asked by
Anonymous
1,274 views
A glass window with a mass of 20kg is heated to a temperature of 32C by the sun. How much thermal energy is released by the
7 answers
asked by
angelina
1,590 views
A large swinging ball is used to drive a horizontal iron spike into a vertical wall. The centre of the ball falls through a
7 answers
asked by
physicslover
3,124 views
A simple machine has an efficiency of 0.75 & a VR of 12.determine the MA & load that can be moved if an effort of 100N is
7 answers
asked by
SMEGN
2,763 views
An object of mass 50 g floats in a liquid of density 2.5 g/ml. When the object is placed in a liquid of density 2.0 g/ml, it
4 answers
asked by
Valeriya
4,013 views
A 20-Ω resistor and a 30-Ω resistor are wired in parallel and connected to a 9.0-V battery.
a. How much current is drawn from
5 answers
asked by
Amy
1,392 views
In its final trip upstream to its spawning territory, a salmon jumps to the top of a waterfall 1.9m high. What is the minimum
6 answers
asked by
anonymous
1,354 views
A 6.25gram bullet traveling at 365ms-1 strikes and enters a 4.50kg crate.The crate slides 0.15m along a wood floor until it
4 answers
asked by
physics101
2,765 views
A bar is 20cm long. A 100g mass is placed on one end and a 150g mass on the other. where is the balance point of the bar?
7 answers
asked by
Ali
2,436 views
Two aluminium spheres P and Q, of masses 0.50 kg and 1.0 kg respectively, are released at the same time from the same height.
Why
4 answers
asked by
Valeriya
1,193 views
charges of +2uc,+3uc,and -8uc are placed at the vertices of an equilateral triangle of side 10cm.
calculate the magnitude of the
4 answers
asked by
poppy
2,694 views
A golf ball and a bowling ball both move at the same speed and collide head on do you think will move backward when they hit?
4 answers
asked by
l
1,032 views
Two blocks of masses m1=4kg and m2=5kg are connected by a massless string that passes over a massless frictionless pulley.block
4 answers
asked by
tizazu
1,174 views
Does a couch of mass 750 kg move on a carpeted floor with μs = 0.33 and μk = 0.22, if it is pushed with a force of 400N?
4 answers
asked by
sky
449 views
a 75 kg object traveling at 4 m/s collides with and sticks to a 125 kg object initially at rest, what is the final velocity of
4 answers
asked by
j
513 views
The efficiency of a machine is 80%. Determine the work done by a person using this machine to raise a load of 200kg through a
12 answers
asked by
Anonymous
3,859 views
A hot solid of mass 100 g at 100°c is quickly transferred into 100 g of water in a container of mass 200 g at 20°C. Calculate
3 answers
asked by
utuje ferouzi
648 views
calculate the work done if a force of 10N applied at an angle of 30 0degree to the horizontal moves the body through a distance
4 answers
asked by
CEO
795 views
An object is moved from the outdoors, which is at a temperature of 100 ºF, to a room at a temperature of 70 º F. What happens
5 answers
asked by
anon
4,218 views
The gravitational field intensity at location X in space is (2/5) of its value on the earth's surface. If the weight of an
3 answers
asked by
samba mambo
551 views
an off-road dumper truck can hold 325 tons of gravel. how much work must be done on the gravel to raise it an average of 9.2 m
4 answers
asked by
frell
585 views
• Moe, lary and curly push on a 752Kg boat that floats
next to dock. They each exert an 80.5N force parallel to the dock •
4 answers
asked by
jasmine
787 views
To catch a water-filled balloon without breaking it, people allow their hands to move with the balloon upon catching it. This
4 answers
asked by
fern
309 views
An aluminum block absorbs 1.0 x 104 J of energy from the Sun when its temperature increases by 5.0 °C. What is the mass of the
4 answers
asked by
emily
1,613 views
The efficiency of an electric motor is 20 %. When lifting a body 500 J of energy are wasted. What is the useful work done by the
7 answers
asked by
flirtyme
5,715 views
The mass of a rocket car plus fuel is 2,000 kg. The rocket car starts from rest. The engine expels fuel (in the form of exhaust)
4 answers
asked by
Lauren
711 views
A crowbar ,1.5m long is used to lift a 100kg rock out of a hole 25cm deep.If the crowbar pivots 50cm from one end ,what is the
1 answer
asked by
mimi
1,013 views
a lead shot is projected from the ground level with a velocity U at an angle 0 to the horizontal. Given the time t for the lead
4 answers
asked by
Pablo kesh
593 views
Consider three displacement vectors, D = (5.8 m, -6.5 m), B = (-9.1 m, 2.1 m), and A = (22 m, 18.3 m). There exist scalars a and
4 answers
asked by
pal
3,065 views
A 69 kg person is standing on a bathroom scale (calibrated in Newtons) in the middle of an elevator. Determine the reading on
5 answers
asked by
bhvhtr
779 views
In the diagram below, a water wave having a speed of 0.25 meter per second causes a cork
to move up and down 4.0 times in 8.0
4 answers
asked by
tom
2,023 views
an air bubble of volume 4 cm cubic is formed 20 cm under water. what will be its volume when it rises to just below the surface
4 answers
asked by
olabanjo maleeq
955 views
The ants of the North Creek Ant Colony traverse a straight trail between their colony and a nearby picnic table. One ant,
4 answers
asked by
Anonymous
1,836 views
a boy standing on top of a building throws a stone to hit an object on the ground. state the energy changes that occur in this
5 answers
asked by
ezinne
308 views
a foolish boy remove a nail from a vertical wall by pulling a stick attached to the nail in a direction 30 deg to the wall.
if
4 answers
asked by
Pablo kesh
1,132 views
A bowling ball has a mass of 25kg and a velocity of 20m/s. A marble has a mass of 5kg and a velocity of 50m/s. Which has greater
5 answers
asked by
l
1,212 views
Use g=10 N/kg in this assignment.
1. What is the gravitational energy (relative to the unstretched surface of the trampoline) of
1 answer
asked by
aimee
309 views
1. The weight in the following diagram has a mass of 0.750 kg and the cart has a mass of 0.52 kg. There is a friction force of
3 answers
asked by
liz
1,339 views
How many electrons pass through a wire in 5 minutes, if the current through a wire is 400 mA
7 answers
asked by
satinder
7,133 views
Two resistors of resistances 3 ohms and 6 ohms are connected in a parallel across a 9 V battery. What is the equivalent
6 answers
asked by
Sam
4,277 views
A boy jumps from a wall 3m high. What is an estimate of the change in momentum of the boy when he lands without rebounding?
the
4 answers
asked by
physics8ater
3,431 views
Each side of a metal cube is measured to be 2.0 cm ±0.20 cm. What is the absolute uncertainty in the calculated volume of the
4 answers
asked by
Anonymous
3,290 views
A tube of uniform cross sectional area closed at one end contain some dry air which is sealed by a thread of Mercury 15.5cm
3 answers
asked by
poppy👌🤔
986 views
A wire of length 100cm and cross-sectional area 2.0*10-3cm2 has a resistance of 0.1 ohms.
calculate it's electrical conductivity?
3 answers
asked by
Albert Bonnie
1,768 views
A faulty Celsius thermometer reads 0.7 at the melting point of pure ice and 99.5 degree Celsius at the boiling point of water at
6 answers
asked by
abubakar
1,993 views
a man uses a roqe to haul box of weight 600N up an inclined wooden plank of effective lenght 3.0m and onto a platforn 1.0m high
5 answers
asked by
Pablo kesh
3,103 views
A body of mass 500g suspended from the end of a spiral spring which obeys Hooks law, produced an extension of 10cm. If the mass
4 answers
asked by
Cynthia
3,117 views
If a high-diver performs a handstand dive (falls vertically) from a platform and enters the water with a velocity of 18.98 m/s,
4 answers
asked by
Evan
1,486 views
Two cars both cover a straight distance, d = 268 m, in time t = 29 s. Car A moves at a constant velocity (vA). Car B moves at a
5 answers
asked by
k
2,030 views
How much thermal energy must be added to 0.96 kg of water at 100 ∘C to make steam at 100 ∘C?
5 answers
asked by
micheal
1,149 views
The range of a cannot ball fired horizontally from a laboratory table is equal to 8/3 Times the height of a table What is the
4 answers
asked by
dawit
921 views
Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.55 cm , its potential energy
4 answers
asked by
sinti
2,955 views
Determine the frequency and period for a pendulum of length 250cm, mass of 500g, and amplitude of 25cm
I don't understand how to
3 answers
asked by
Angela
856 views
14.To test the durability of a new shock-proof camera, the company has the camera dropped from a height of 15.0 m. Assume air
5 answers
asked by
emily
1,427 views
A skateboarder travels on a horizontal surface with an initial velocity of 4.4 m/s toward the south and a constant acceleration
4 answers
asked by
alison
4,002 views
find the triple product of (A*B).C given that A =i + 4j, B=2i - 3j and C = i + k?
2 answers
asked by
poppy
997 views
In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0kg from a vertical steel wire 0.50m long and 2.5
3 answers
asked by
poppy👌🤔
1,043 views
two forces are of magnitude 450N and 240N respectively determine the maximum magnitude of the resultant force.
4 answers
asked by
melissa
800 views
a body mass 50g is suspended at the 20cm mark of a uniform meter rule. the meter rule is adjusted on a pivot until it balances
4 answers
asked by
Sarah Banks
2,464 views
a ball thrown with an initial velocity of (10i+15j)m/s. when it reaches the top of it trajectory, neglecting air resistance,
6 answers
asked by
amlakinesh
2,119 views
The resonance frequency f of a closed air column is know to depend on the pressure p,density of air and the length of air
4 answers
asked by
Divine
945 views
The weight in the following diagram has a mass of 0.50 kg and the cart has a mass of 0.26 kg. Friction is negligible. What is
3 answers
asked by
help
470 views
A trombone player stands at the end zone (x = 0) of a football field and begins to play its fundamental tone. Assume the
2 answers
asked by
Anonymous
225 views
The length of a spring when a mass of 20g is hung from its end is 14cm,while its total length is 16cm when a mass of 30g is hung
7 answers
asked by
kolade
2,272 views
A fighter jet is flying at Mach 3.2 in air of temperature 2 degrees C. What is the planes speed?
I really don't understand how to
4 answers
asked by
emily
772 views
a golf ball is hit at an angle of 45 degrees with the horizontal. if the initial velocity of the ball is 52m/s , how far will it
6 answers
asked by
michelle
4,105 views
On an aircraft carrier, a jet can be catapulted from 0 to 175 mi/h in 2.00 s. If the average force exerted by the catapult is
4 answers
asked by
ananomyus
749 views
help me please? I'm lost...
A small space probe is put into circular orbit about a newly discovered moon of Saturn. The moon's
4 answers
asked by
Ricky
1,902 views
A railway truck on a level, straight track is initially at rest. The truck is given a quick, horizontal push by an engine so
3 answers
asked by
Anonymous
2,104 views
A bus moves from rest with a uniform acceleration of 2m/s(square) for the first 10s. It then accelerate at a uniform rate of
7 answers
asked by
Uloma
2,202 views
According to the work-energy theorem, in the absence of friction, if you do 100J of work on a cart while pushing it across a
4 answers
asked by
Tb
605 views
A helicopter flies to the right (in the +x direction) at a constant speed of 14 m/s, parallel to the surface of the ocean. A
4 answers
asked by
Jonas
5,083 views
A 68 g ice cube at −23◦C is dropped into a container of water at 0◦ C.
How much water freezes onto the ice? The specific
3 answers
asked by
Reese
5,406 views
A potentiometer circuit consists of a battery of e.m.f 5v and internal resistance 10 ohms connected in series with a 30 ohms
4 answers
asked by
poppy
1,682 views
how long will it take for a 1.5A current to coat evenly a layer of copper 0.1mm thick on both sides of a 12cm by 12cm copper
3 answers
asked by
poppy
889 views
An average of 120KW of electric power is sent to a small town from a power plant constant 10km away.the transmission lines have
4 answers
asked by
poppy
3,566 views
if a cell supplies a current of 0.5a when it's emf is 2v and internal resistance is 1 ohms calculate it's external resistance
4 answers
asked by
poppy👌🤔
746 views
what is the resistance of a 240v, 60w electric filament bulb? a). 0.25ohms b). 480ohms c). 60ohms d). 240ohms e). 960ohms?
4 answers
asked by
poppy👌🤔
1,981 views
The current in a series circuit is 11.7 A. When an additional 8.87-Ω resistor is inserted in series, the current drops to 6.83
4 answers
asked by
Gigi
1,613 views
The radius of an atom is 10^-10 m,if an electron of mass 9×10^-31 kg has an angular velocity of 8π radsecs.if the period of
4 answers
asked by
Don Morris
583 views
A hollow metal sphere of mass 5kg is tied to the bottom of the sea-bed by a rope. The tension or force in the rope is 60 N.
Calcu
7 answers
asked by
Don Morris
1,088 views
If a body moving with simple harmonic motion has an angular velocity of 50 radiansper second, and an amplitude of 10 cm,
5 answers
asked by
Pablo kesh
1,229 views
A spring of natural length 3m is extended by 0.01m by a force of 4N. What will never it's length when the applied force is 12N?
1 answer
asked by
Prince
876 views
Calculate the force on a mass of 10kg placed on the earth's surface ( radius of earth = 6.4*10^6m and mass of earth =6.0*10^24kg
6 answers
asked by
lotus
1,431 views
A body moving with simple harmonic motion in a straight line has a velocity V and acceleration A, when the instaneous
2 answers
asked by
Prof lambchop
688 views
The radius of the planet Venus is nearly the same as that of the earth, but its mass is only 80% that of the earth. If an object
4 answers
asked by
Angel
1,207 views
charges of 4uc and -6uc are placed at two corners of an equilateral triangle with sides of 0.1 m .What is the magnitude of the
4 answers
asked by
Anonymous
1,500 views
What does the gradient represent in a voltage vs time-capasitor graph?
3 answers
asked by
Kay
415 views
Pages
1
2
3
4
5
6
7