eNotes Homework Help is a way for educators to help students understand their school work. Our experts are here to answer your toughest academic questions! Once it’s posted to our site, your question could help thousands of other students.
Popular Titles
Showing
in
Physics

PhysicsThe impact force they both experience is exactly the same. This is according to the third Newton's Law: in every interaction between two objects, the objects act on each other with the forces that...

PhysicsThe object is 2.3 cm tall, and 5.5 cm from a converging lens. The image is upright and 9.0 cm tall. The magnification due to the lens is `M = 9/2.3` . In terms of the distance of the object from...

PhysicsWe know that `n_1sin(theta_1)=n_2sin(theta_2)` where `theta_1` is the angle subtended between the incident ray and the normal to the interface, and `theta_2` is the angle subtended between the...

PhysicsA +35 "mu"C point charge is placed 32 cm from an identical +35 "mu"C charge. What is the electric...If the two charges are 32 cm from each other, than the distance of the mid point to each charge is r = 32/2 = 16 cm. The equation for voltage (V) with respect to charge (Q) is `V=(kQ)/r` , where k...

PhysicsYou need to use the following equation that helps you to evaluate the balancing force of electric field, such that: `F = q*E => E = F/q` Since the problem provides the mass `m = 5*10^(3)Kg` of...

PhysicsYou need to use Coulomb's law to evaluate the distance between charges, such that: `F = k*(q_1*q_2)/r^2 => r^2 = k*(q_1*q_2)/F` Since the problem provides the force `F = 2.3 N` and the charges...

PhysicsColoumb's law tells us that the electrostatic force of attraction between point charges is directly proportional to the product of the charges and inversely proportional to the square of the...

PhysicsYou need to evaluate the magnitude and direction of electric field, using Coulomb's force, such that: `E = F/q` Since the problem provides the mass of foam ball, you need to replace the product...

PhysicsThe electric field lines always point in the directon of decreasing potential. So if the field points EAST, and the point in question is located to the WEST of the point with the voltage 80V, the...

PhysicsThe capacitance of a parallel plate capacitance is given by `C = (k*epsi_o*A)/d` where `epsi_o` is the permittivity of free space and equal to `8.854*10^12` F/m, k is the relative permittivity of...

PhysicsIn Camera we use convex lense. for convex lense as convention u is (),vand f are (+) and lense formula is 1/v1/u=1/f a. f=80mm=.08m u= 10 m Thus `1/v=1/.08+1/10` `=1008/80`...

PhysicsThe magnification M is the ratio of image height to the object height: `M=h_i/h_o=9/2.3=3.91` This ratio is equal to the ratio of the image distance to the object distance, from the similarity of...

PhysicsWhen a beam of light passes from one medium to another the beam bends if the two mediums do not have the same refractive index. If the angle of incidence is A and the angle of refraction is B, the...

PhysicsAnswer: 53.6° Recall Snell's Law: `n_1sin(\theta_1)=n_2sin(\theta_2)` where n is the index of refraction of the material and `\theta` is the angle the ray makes with the normal (perpendicular) of...

PhysicsWhen a beam of light passes from one medium to another the beam bends if the two mediums do not have the same refractive index. If the angle of incidence is A and the angle of refraction is B, the...

PhysicsAnswer: 47.5° This is similar to another post. You can review the concept there  the link is in the reference. Snell's Law and the Critical angle formula combine... Make sure to keep track of...

PhysicsTo solve, apply the formula of index of refraction which is:`n=c/v` where,n  index of refractionc  velocity of light in a vacuum ( 3 x 10^8 m/s) andv  velocity of light in a mediumSo, plugin...

PhysicsGiven `\DeltaKE = 7.45\times10^(17)\text(J)` `q_e = 1.602\times10^(19)\text(C) ` Due to the conservation of energy, the change in kinetic energy came from the change in potential energy due to...

PhysicsAn electron has a charge `q=1.6xx10^(19)C`Voltage is defined as the electric potential energy per charge i.e `V=(PE)/q`Therefore, `PE=qV` This energy is converted to KE as it accelerates....

PhysicsHow much work does the electric field do in moving a proton from a point with a potential of +125...Given: V_a = +125 V V_b = 55.0 V and q_p = +1e = +1.602\times10^19\text(C) The electric field does work on the proton much like the gravitational field does work on a mass. A mass falls from high...

PhysicsThe potential difference between the two points, or voltage `Delta V,`is defined as the work it would take to move a positive unit charge from the first point to the second, AGAINST the electric...

Physicsmagnetic flux through coil area =1.2 sq m `phi=BA` Wb `phi=1.5xx1.2` `=1.8 ` Wb `phi_1=BA_1` `=1.5xx.4` `=0.6` Wb change in magnetic flux=`Deltaphi` so we have `Deltaphi=0.61.8` `=1.2` `Delta...

PhysicsCharge of electron q=`1.6xx10^(19) C` `` Velocity of electron v=`2.5xx10^7` m/s magnetic field B=`1.5 T` `F=qvB` N `=1.6xx10^(19)xx2.5xx10^(7)xx1.5 = 6.0xx10^(12) N` West.

PhysicsThe crosssectional area of an adjustable single loop is reduced from 1.2 m^2 to 0.40 m^2 in 0.25...magnetic flux `phi=BA` Thus magnetic flux when area of cross section 1.2 sq m is `phi= 1.5xx1.2 ` Wb `phi=1.8 Wb` The magnetic flux ,when area of cross section .4 sq m is `phi_1=1.5xx.4 Wb` `=.6...

PhysicsGiven `I=1000A` R=10m Magnetic field B is `B=(mu_0 I)/((2pi) R) T` `=(4pixx10^(7)xx10^(3))/(2pixx10) T` `=2xx10^(5)T` Ans.

Physics(a) Zero (direction of field and current is always perpendicular) (b)Magnetic field B={(2sqrt(2)mu_0)I} /(piL) `B=(2sqrt(2)mu_0I)/(piL)` `mu_0=4pixx10^(7)` `,` `I=.60A ,` ` L=2.0m`...

PhysicsLet Induced emf is `epsi` ,so we can define `epsi=(N.Deltaphi)/(Delta t)` where N = no. of turns =2 `Deltaphi= ` change in magnetic field =88Wb `Deltat=` change in time = .42...

PhysicsA 256 turn coil with a cross sectional area of 0.0025m^2 is placed in a uniform external magnetic...The magnitude of the induced emf is `epsi=(Nphi)/(Deltat)` V where `phi=` magnetic flux , `phi=BA cos(0^o)` `=.25xx.0025=6.25xx10^(4)` `Tm^2` N= number of turns=256 , `Deltat` =.75s...

PhysicsB=1.5 T diameter of coil= 12 cm radius=6 cm=.06m magnetic flux through the loop say `phi` `phi=B.(pi.r^2)cos0^o` `=1.5xx(22/7)xx(.06)^2=1.697xx10^(2)` `Tm^2` emf=`phi/(Deltat)`...

PhysicsA single circular loop with a radius of 22 cm is placed in a uniform external magnetic field with...(a)The magnetic flux through the area enclosed by the loop is say `phi` so `phi= B(pir^2)Cos(0^o)` `=(.50)((22/7)xx22^2) xx1` `=760.571` `Tm^2` (b)The induced emf is then say `epsi`...

PhysicsAt what distance from a long straight wire carrying a current of 5.0 Amps is the magnitude of the...The magnetic field due to a current flowing through an infinitely long wire is given by `B = (mu*I)/(2*pi*r)` where B is the magnetic field, mu is the permeability of free space and equal to...

PhysicsThe magnetic field of a long straight wire at the distance d away from the wire is determined by the formula `B=mu_0I/(2pid)` where I is the current in the wire and mu_0 is the magnetic...

PhysicsIf a wire of length L carrying a current I lies in a magnetic field B, the force on the wire due to the interaction between magnetic fields is given by F = `I*LxxB` . In the problem, the wire of...

PhysicsHow much current is flowing in a wire 4.8 m long if the maximum force on it is 0.75 N when placed...If a wire of length L carrying a current I lies in a magnetic field B, the force on the wire due to the interaction between magnetic fields is given by F = `I*LxxB` . For a wire that is 4.8 m long,...

PhysicsIf a wire of length L carrying a current I lies in a magnetic field B, the force on the wire due to the interaction between magnetic fields is given by F = `I*LxxB` . A straight wire of length 160...

PhysicsThe voltage at which power is delivered to the factory is 12000V. To determine the current that travels through the wire that carry the power, either the power delivered or the resistance of the...

PhysicsThe power station delivers 600 kW of power at 12000 V to a factory. Power (P) is related to current (I) and voltage (V) by: P = V*I. Substituting the values in the problem 600000 = 12000*I => I...

PhysicsThe resistivity of a material using which a resistor is made is constant. It does not depend on the dimensions of the resistor though it may vary with other factors like temperature. If two copper...

PhysicsWhat are the websites to buy project materials like propellers, motors, resistors etc in India in...www.ebay.com

PhysicsSince we are dealing with a test charge at the center of a square of side 0.1 m, the field from each corner will be directed along a diagonal of the square, toward the negative charges and away...

PhysicsThe object is dropped from a height of 26.8 m. As it is dropped, the initial velocity of the object is 0 m/s. It is assumed that the acceleration of the object is a constant over the entire...

PhysicsThis is vector problem, but you can also think of this in small chunks For every 0.4m to the south east, the boat gets pushed east 0.5 m. We determine where the boat is after 1 second, find the...

PhysicsThe person is originally gliding at a height 215 m with a velocity 25.4 m/s. A sudden dive to a height 178 m is made. It is not possible to estimate the velocity of the person at this level unless...

PhysicsThe person is gliding at a height 215 m with a velocity 25.4 m/s. The sum of the kinetic energy and gravitational potential energy of the person is equal to (1/2)*m*v^2 + m*g*h where v is the...

PhysicsThe roller coaster with mass 4357 kg is initially at rest at a height 36.5 m. It moves down and reaches the top of a loop where its height is 10.8 m. To determine the speed of the roller coaster at...

PhysicsDiffraction is a phenomenon observed with all forms of waves, including, light, sound, and water. It involves the change in direction of waves as they pass around a barrier or through a small...

PhysicsTime dilation is the phenomenon that time seems to slow down in other frames of reference. The most common calculation of time dilation in introductory physics involves the Lorentz transformation...

PhysicsIf a refrigerator or a cabinet is placed on a surface its movement is resisted by the force of friction which is given by F = mu*N where mu is the coefficient of friction and N is the normal force....

PhysicsFriction is an incredibly important force in everyday life. It is the resistance force to movement between the physical contact of two objects. It allows us to plant our feet on the ground and...

PhysicsThe energy used producing oscillations is kinetic energy. Total energy of the system is kinetic energy plus potential energy. Potential energy is energy not triggered for any action at any moment....