Answers created by A08
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Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N?
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Horizontal force of 50N accelerates a block of mass 3.0 kg up an incline with an A=2.0ms^-2. The angle with horizontal is 30^o. Find a) force of friction between the box and the incline b) the coefficient of kinetic friction between box and the incline?
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An iron rod of length 100m at 10°C used to measure a distance of 2km on a day when the temperature is 40°C. Calculate the error in measuring the distance?
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The bulk modulus of lead is #4.6# GPa. By what fraction will the density of a
piece of lead increase if it is lowered to the bottom of the Pacific Ocean where
the pressure is #40# MPa?
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A cubical box consists of 4 square sides and a square base but has no top.
The sides and the base are all made of thin sheet metal of uniform thickness.
If the edges of the box are all 200 mm in length, how far above the base is the
box’s centre of mass?
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Calculate the angular frequency of the system shown in the figure. Friction is absent and threads are massless? Hint: The system performs SHM. Try not to use the energy conservation method.
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A boat travelling at top speed upstream moves at 15 km per hour. When it travels downstream, again at top speed, it moves at 25 km per hour. What is the boat top speed in still water?
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Physics and calculus?
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A cone is 9cm high and has vertical angle of 60 then the diameter of it's base is.
A) 3√3. B) 6√3. C) 9√3. D)18√3. ?
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How do I simplify this?
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The end of two thin steel rods of equal length are welded together to make a right angled frame. Locate the frame's center of mass?
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An electron is moving to the east at a speed of #1.8*10^6 m/s#. It feels a force in the upward direction with a magnitude of #2.2*10^-12N#. What is the magnitude and direction of the magnetic field this electron just passed through?
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A rocket with a total mass of #20 kg# will take off with an acceleration
of #12 ms^-2# if it is launched so that its trajectory is vertically upward. a) Calculate the force produced by the rocket engine? (please check below for part b)
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Why gravitational potential energy always have a negative sign?Also explain the graph of variation of gravitational potential energy with distance r from the centre of the earth?
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Can anyone help me with
9709 may/June/2017 paper 43
Question number 7 part (ii)
I have found velocity and acceleration as #v=1.68# and #a=2.83#
I don't understand how it will move further?
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Can anyone help me with
9709 may/June/2017 paper 43
Question number 7 part (ii)
I have found velocity and acceleration as #v=1.68# and #a=2.83#
I don't understand how it will move further?
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Help with physics?
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Three forces P, Q and R act at the same point and are in equilibrium. The
forces P and Q have magnitudes 30 N and 20 N respectively, and there is an
angle of 20° between their directions. Calculate the magnitude of the force R?
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Please help me with question number 6 part (i)?
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A press machine is required to punch out discs of 40 mm diameter from steel plate 1.5 mm thick with a shear strength of 200 MPa.
Calculate the compressive strength in the punch.?
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Hi can someone help me find this calorie equation?
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A hypothetical particle has a mass 512eV/c^2.If such a particle at rest decays into two gamma-rays photons, what is the wavelength of each photon?
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Given that #xe^y = x+1#, show that #e^y + xe^ydy/dx = 1#?
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In a television tube, electrons are accelerated by a high voltage, and strike the screen with an average velocity of 4.04x10^6 m s^-1.
Calculate the average de Broglie wavelength (in nm) of the electrons?
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Help with this cal question?
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Please solve q 60 ?
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A light beam is reflected off the edge of an optic fibre at an angle of 0.0042o . The diameter
of the fibre is 69 µm.
Find the equation of the reflected beam with the -axis (at the centre of the fibre) and the yaxis
as shown?
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Can I know how to solve this physics question?
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A sailboat is pushed with a linear drag coefficient 83 g/m by wind blowing at a speed 2.97 m/s, while being slowed by a quadratic drag with the still water of 105 g/s.
What is the cruising speed of the sailboat?
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A black body has absolute temperature T and surface area A. The intensity of the radiation emitted
by the body is I. Another black body of surface area 2A has absolute temperature 2T. What is the
intensity of radiation emitted by this second black body?
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The particle p is released from rest at the top of a smooth plane inclined at angle a where sina=16/65.the distance travelled by P from top to bottom is S metres and speed of P at bottom is 8ms^-1 find S and hence speed of P when it has travelled 1/2S?
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Solve the question ?
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A satellite is placed in synchronous orbit around an exoplanet of mass 44⨯10^24 kg and radius 18⨯10^6 m.
If the planet's day is 87.8 hours, at what altitude should you place the satellite?
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Mechanic help?
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7. An 8-gauge iron wire with n=1.7 x 10^29 m-3 is 1.99 mm in diameter
d can carry a maximum current of 24 A. Find the drift speed of the
electrons at this maximum current?
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Integer type answer?
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A wagon is pulled by a force of 60 pounds on the handle at an angle of 45 degrees to horizontal. What is the work done in moving the wagon 50 feet up a 15 degree hill?
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Any physics expert online? See the attachment below.
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Magnetic field question, please help?
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If a rocket with a mass of #8000 " tons" # vertically accelerates at a rate of # 4 m/s^2#, how much power will the rocket have to exert to maintain its acceleration at 3 seconds?
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If the atmospheric pressure is 101 kN/m^2 , what is the absolute pressure of water at depth of 12 m below the surface?
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What is the force acting on an alpha particle traveling at 2V parallel to a magnetic field of strength 2B?
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I tried using change in momentum. How can I find Fmax?
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How does energy relate to the transportation and deposition of sediments?
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Find the distance of the image when an object is placed on the principle axis at a distance of 10cm infront of a concave mirror whose radius of curvature is 8m?
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Initial horizontal velocity?
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A signal is broadcast at a resonant frequency of 1 MHz, if the circuit has a 100 pF capacitor what inductor value do they need to receive this resonant frequency? Give your answer in μH.
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I have 5 components:
component 1 uses 15mA at 5V
component 2 uses 66mA at 3V
component 3 uses 20mA at 5V
component 4 uses 40mA at 7V
component 5 uses 9mA at 5V
What is the power consumption?
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The substance as a result of the chain of transformations loses one α_ and two β- particles and becomes U(234,92). Find the initial radioactive element ?
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Give reason ?
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At a particular instant in the flight the glider is losing 1.00 m of vertical height for
every 6.00 m that it goes forward horizontally. At this instant, the horizontal speed of
the glider is 12.5 m s–1. Calculate the velocity of the glider?
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The gravitational force exerted on a baseball is #-F_ghatj#. A pitcher throws the ball, initially at rest, with velocity #v hat i# by uniformly accelerating it along a horizontal line for a time interval of #t#. What force does he exert on the ball?
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What is the integral of this and how to get to the answer? (substitution method)
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A truck pulls boxes up an incline plane. The truck can exert a maximum force of 4,000N. If the plane's incline is #(5π)/8# and the coefficient of friction is #9/8#, what is the maximum mass that can be pulled up at one time?
Thanks
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The perimeter of the isoceles triangle is 30cm.if the ratiobetweenits sides is 1:1:2,find the length of the hypotenuse?
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Help me anyone on physics?
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Help me anyone on physics?
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Physics and calculus?
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How about Answer ?
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How to prove #m=m_0/(sqrt(1-(v^2/c^2)))?#
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Two 6.6 kg bodies, A and B, collide. The velocities before the collision are A = (32 i + 41 j) m/s and B = (31 i + 3.2 j) m/s. After the collision, velocity of A = (7.9i + 11 j) m/s. ?
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2 litres of water have have reached the temperature of 103°C, without beginning to boil. However after throwing in a small piece of ice (with insignificant mass), the water began to boil. What is the mass of water that transformed into water vapor?
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Engineering Electromagnetics.
How about solution?
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The resistivity of copper is 1.7 X 1O^-8 ohm m. What length of copper wire of diameter 0.1 mm will have a resistance of 34 ohm?
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How to do this through lami theorem?
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A ball is tossed vertically upwards with a speed of 5.0 m s–1. After how many seconds will the ball return to its initial position?
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It is about finding kinetic energy
want help in part 1 not part 2
in part 1 please tell how to find velocity?
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What is the mass if A force of 350N is applied in the object making it accelerates at the rate of mass per second squared?
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How about solution. ( I = ?)
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It is question about finding distance from velocity time graph?
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Three point charges of +2q, -q and -q are placed at the corners A, B and C of an equilateral triangle ABC of side ‘x’. What is the magnitude of the electric dipole moment of this
system?
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Work out?
The maximum range of projectile is 3000M.what would be its range when it is launched at an angle of 150 with the horizontal?
Thanks
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Its question about velocity time graph?
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A certain light truck can go around a flat curve having a radius of 150m with a maximum speed of 32.0 m/s. With what maximum speed can it go around a curve having a radius of 75.0m?
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The athletics track consists of a rectangle and two semi-circles. inside the track there is a VIP SECTION 20M LONG AND 15M WIDE. during a 6 km race evenner ran 8.05 rounds before fainting. how many km (three decimal places) did she run?
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A problem about the motion of planets?
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Please solve q 99?
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An inductor stores u energy and I current is passed through it and dissipate energy at the rate of P.The time constant of the circuit,when this coil is connected across a battery of zero internal resistance?
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What is the capacitance such that the current through the circuit is a maximum?
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Ice cubes of total mass 6.00 grams have temperature -4.0°C, and are placed in 50.0 grams of water at 20.0°C in an insulated foam cup. the equilibrium temperature of the water inside the cup? READ DETAILS, TOO.
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Why we use #mu_0# for air when calculating the magnetic flux density inside an electric cable where (r<R) instead of the permeability of the metal core
#mu#.
#"
"#
#B=(mu_0Ir)/(2piR^2)#?
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How do I solve this polynomial?
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What would be the kinetic energy?
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Circular Loop Question?
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Please solve it?
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How do you solve this if mass isn't known??? (Forces question)
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Variable acceleration?
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In a blood transfusion,blood flow from a battle at atmospheric pressure into a patient vein in which the pressure is 20mmHg higher than atmospheric.The bottle is 95cm higher than the vein and the needle into the vein has length of 3cm and diameter 0.45mm?
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A railway track running N-S has 2 parallel rails 1m apart. If the horizontal component of magnetic field at that place is 0.3*10^-4 and angle of dip is 60°, then what'll be the value of induced emf b/w the rails when a train passes at a speed of 90km/ h?
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How to solve this question?
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How to solve this question?
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A nursery determines the demand in May for potted plants is p=3-(x/1000). the cost of growing x plants is c(x)= 0.02x +4000, 0<x<6000. determine the marginal profit function.?
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Collision and rotation problems?
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How do you convert from joules to electron volts?
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How do I simplify #(3sqrt3 - 1)^2 / (2sqrt3 - 3)# ?
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A shell of mass 5 kg is fired at 60 degree to the horizontal with a speed of 20 m/sec. Neglecting the air resistance, the K.E of Shell in joule is at highest point is?
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Poynting vector problems?
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What is its final velocity if its original velocity is -2.9 m/s ?
What is the average force exerted on the particle for the time interval between 0 and 5.00 s.
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Can someone help me with this question pleas ?
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Physics Angular accelerations?
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