# Physics Homework Help

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• Physics
We can use the magnification equation to help us out: Magnification = the distance between the mirror and the image, divided by the distance between the object and the mirror. In other words: M =...

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• Physics
This is advice, and as such is only my personal solution. Your education has supplied you with several skills besides a thorough knowledge of the laws of physics. You now know how to use the...

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• Physics
There are a number of ways, we can solve this "egg-problem". A fall of 100 feet in the air is desired, without breaking the egg. Note that it is never the fall that breaks the egg, it is the impact...

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• Physics
First, we need to find the resultant force acting on the block with the following equation: F = F1(hori) + F2(hori) – μN Where: F1(hori) = F1 cos 20°, is the horizontal component of F1 F2(hori)...

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Looking at the details provided in the question, your objective is to create a heating system that is non polluting and requires no external energy source. The temperature of the room being heated...

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• Physics
The 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...

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• Physics
The 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...

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• Physics
We 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...

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• Physics
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...

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• Physics
You 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...

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• Physics
You 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...

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• Physics
Coloumb'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...

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• Physics
You 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...

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• Physics
The 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...

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• Physics
The 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...

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

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• Physics
The 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...

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• Physics
When 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...

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• Physics
Answer: 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...

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• Physics
When 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...

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• Physics
Answer: 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...

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• Physics
To 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, plug-in...

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• Physics
Given \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...

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• Physics
An electron has a charge q=-1.6xx10^(-19)CVoltage is defined as the electric potential energy per charge i.e V=(PE)/qTherefore, PE=qV This energy is converted to KE as it accelerates....

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• Physics
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...

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• Physics
The 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...

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• Physics
magnetic 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=0.6-1.8 =-1.2 Delta...

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• Physics
Charge 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.

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• Physics
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...

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• Physics
Given 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.

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• 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...

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• Physics
Let 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...

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• Physics
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...

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• Physics
B=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)...

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• Physics
(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...

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• Physics
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...

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• Physics
The 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...

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• Physics
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 . In the problem, the wire of...

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• Physics
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,...

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• Physics
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 . A straight wire of length 160...

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• Physics
The 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...

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• Physics
The 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...

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• Physics
The 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...

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• Physics
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• Physics
Since 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...

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• Physics
The 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...

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• Physics
This 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...

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• Physics
The 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...

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• Physics
The 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...

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