# Physics Homework Help

### Showing All Questions Answered Popular Recommended Unanswered Editor's Choice in Physics

• Physics
general equatin: sin(theta) = m`lambda` /a ; m = ...,-2,-1,0,1,2,... central maximum ==> m = 1 so: sin(theta) = y/L = (`lambda`)/a ==> y = L `lambda`/a = 3 * 630e-9/0.5e-3 = 0.00378 m ==>...

Asked by luessssss on via web

• Physics
The figure is below attached. The light is coming from the left on the figure and arrives at the double slit. Each slit will act as an independent source of light. If the wave front of the incoming...

• Physics
Let volume of the cay be V cubic unit, length be initial be L and radius circular of cross section be r.Thus we have `V=pi r^2 L` (i) when legth of cylinder doubled i.e 2L ,since volume...

Asked by lkehoe on via web

• Physics
The wire with a length of 1 mile has a resistance of 44 ohm. If the wire is cut in half, the resistance of the shortened piece of wire is half the resistance of the original piece of wire. The...

Asked by lkehoe on via web

• Physics
Light is an electromagnetic spectrum that is visible to the human eye, we also call it visible light. It has a wavelength range from 380 (violet) to 740 (red) nanometers. The properties of light...

Asked by user3629853 on via web

• Physics
The player's reflective helmet forms an image of the sun 4.3 cm behind the surface of the mirror. The helmet is approximated to a spherical mirror. Let the radius of the mirror be r. The image...

Asked by stareem on via web

• Physics
A train traveling 50 m/s reduces its velocity by 45 m/s over the course of 80 s. Assuming that the velocity change is constant we would find the rate of change by dividing the amount of change (45...

Asked by dasmith22 on via web

• Physics
eNotes policy only allows for one question per submission so I have editted your question accordingly. I have decided to demonstrate the more difficult question so if you understand these concepts,...

Asked by rwanda255 on via web

• Physics
The Doppler effect means in its essence the fact that for a moving wave (sound in this case) source and for a moving receiver the frequency of the waves is shifted backwards or forwards depending...

Asked by hockeyfan54 on via web

• Physics
The two speakers produce the loudest sound when the waves of both speakers add with constructive interference. Meaning, when the speakers are 30 cm apart, they are adding the waves thus making the...

Asked by mrbest55 on via web

• Physics
The two speakers produce the loudest sound when the waves of both speakers add with constructive interference. Meaning, when the speakers are 30 cm apart, they are adding the waves thus making the...

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• Science
"The greater the acceleration the greater the _____ exerted on an object." The Correct answer would be "force." The greater the acceleration the greater the force exerted on an object. The...

Asked by boogalou1000 on via iOS

• Physics
The violin player is trying to make the frequency of her playing similar to the tuning fork. Now she is able to hear two sound waves, the one from her violin and the other one from the fork. As the...

Asked by bobby9901 on via web

• Physics
Magicians using mirror on their tricks was not a new thing however that skill really makes people amazed. Confusing audience sight is the key for this trick. Since it is very hard to explain the...

Asked by despair on via web

• Physics
The gravitational force of attraction acting on an object of mass m is given by `F = (m*g*r)/R_e` where r is the distance of the object from the center of the Earth and `R_e` is the radius of the...

Asked by Rocky52 on via web

• Automobiles
Automobile wheels are made of steel because they need to withstand a lot of hard wear. Many cars these days will hold up for two hundred thousand miles and even more. The tires mounted on the...

Asked by maahi1704 on via web

• Physics
The projectile is fired at an angle of 43 degrees with the horizontal at an initial speed 30 m/s. The initial velocity of the projectile can be divided into two components, a horizontal component...

Asked by user8010328 on via web

• Physics
The Boyle's law relates the volume of a gas to its pressure at the same temperature. Mathematically it can be written as: `P_1*V_1 =P_2*V_2` The experimental apparatus used to study for the first...

Asked by ahonsi on via web

• Physics
R= (2*sintheta*costheta*u^2)/g = (2*400*1*0)/9.8 = 0 hence the jet of water moves in a vertically upward direction and so range is zero as initial points and final point is the same

Asked by user9157166 on via web

• Science
To orient thinking relating to what Galileo says about the nature of motion, it may be noted that he contradicts the then authoritative ideas of Aristotle, whose ideas were accepted by the Church...

Asked by wanderista on via web

• Physics
Given the system, we can assume that the dinner of your friend is farther from yours. Since there are no values for amount of heat that was used for heating, we can relatively term it as the...

Asked by luessssss on via web

• Physics
The figure is below.The speed of sound in dry air at 20 degree Celsius is `v =343 m/s` . In the portion of tube closed at one end there is only one quarter of wavelength (the standing wave in this...

• Physics
The projectile motion can be represented as: `vf^(2) - vi^(2) = -2gy` and `vf = vi -g t` where vf = final velocity vi = initial velocity = 98m/s g = acceleration due to gravity = `9.8 (m)/(s^(2))`...

Asked by kshockley on via web

• Physics
Using the linear regression from the calculator the quadratic function for this set of data is: f(t) = -15.94t^2 + 110.20 t + 4.87 We find the time when the ball is 6 feet above the ground, thus...

Asked by user4046196 on via web

• Physics
There are two ways in which this problem can be solved. First way is to write the equation of motion for an object that is thrown up with initial speed `v_0` subjected to gravitational acceleration...

Asked by user4046196 on via web

• Physics
For this question, you can use: `dy= V_(iy) * t + 1/2at^2` Now first we shall assign the values needed to solve for the time required. `dy` = -4 (direction is down) `V_iy` = 5m * sin (35) =...

Asked by camper987 on via web

• Physics
`V = 4700(1-t/49)^2` The rate of change of volume of the tank is given by the first derivative. `(dV)/dt = 4700xx2(1-t/49)xx(-1/49)` ---(1) If we need the rate of change at any time what we...

Asked by jmg5639 on via web

• Physics
We know that the simplest equation of motion for an oscillating mass-spring system is of sinusoidal form having an initial phase zero. `y(t) =A*sin(omega*t)` The speed of the mass is the first...

Asked by johnyyyynnynyn on via web

• Physics
The simple harmonic motion is by definition the motion of a point which is subjected to a force that is proportional to the deviation of the point from the equilibrium position``. For mass spring...

Asked by luessssss on via web

• Physics
To solve this problem, first we should remember the following expressions: `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A sin(omega*t + phi)` where: x = length/distance = 5.0 cm v =...

• Physics
To calculate the block's mass, first calculate the energy of the system using the formula `E=1/2kA^2` , where E is the energy in Joules, k is the spring constant in N/m, and A is the amplitude in...

Asked by bogshow24 on via web

• Physics
We know that the angular frequency can be expressed in different forms. `omega = (2*pi)/(T)` `omega = 2*pi*F` `omega = sqrt(k/m)` By equating 1 and 3 we can solve for the spring constant....

Asked by swimmers on via web

• Physics
We first have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A sin(omega*t + phi)` where: x =...

Asked by hockeyfan54 on via web

• Physics
In dealing with Oscillatory Motion, we should take note of the following terms: P = period f = frequency`omega` = angular frequency v = speed A = amplitude E = energy x = length`phi` = phase...

Asked by mrbest55 on via web

• Physics
The shovel is used to lift 3.29 kg of snow and set it into motion. It leaves the shovel at 2.94 m/s at a height of 0.562 m. The work done during the process is equal to the total energy gained by...

Asked by lkehoe on via web

• Physics
Given: Spring constant (k) = 10 N/m amplitude = x(max) = 8.0 cm = 0.08 m speed (v) = 30.0cm/s 0.3 m/s 1. Calculate the mass of the block `omega = (v)/(x_(max)) = sqrt(k/m)` `omega = (0.3)/(0.08) =...

Asked by medusaaaaaaaaa on via web

• Physics
We first have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A sin(omega*t + phi)` where: mass =...

Asked by gomezzzzzzzzzzzzzzzzz on via web

• Physics
First, we have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A sin(omega*t + phi)` where: x =...

Asked by luessssss on via web

• Physics
To solve for the phase constant, we should take note of the following expressions: `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A sin(omega*t + phi)` where: x = length/distance = 5.0 cm v =...

• Physics
To solve this problem, the knowledge of the Hooke’s law is necessary. Given: Spring constant (k) = 10 N/m amplitude = x(max) = 8.0 cm = 0.08 m speed (v) = 30.0cm/s 0.3 m/s 1. Calculate the mass...

Asked by goldbergfan on via web

• Physics
First, we have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. Consider the following expressions: `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A...

Asked by masterpiece11 on via web

• Physics
First, we have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. Consider the following expressions: `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A...

Asked by blasto63 on via web

• Physics
First, we have to solve for the phase constant and the amplitude in order to get the position at t = 0.4s. Consider the following expressions: `x(t) = A cos(omega*t + phi)` `v(t) = dx/dt = -omega A...

Asked by chocobob on via web

• Physics
The simple harmonic motion of a spring can be described by the following equations. `x = Asinomegat = Asin(sqrt(k/m)t)` `dotx^2 = (omega)^2(A^2-x^2)` x = Displacement from the original position...

Asked by bobby9901 on via web

• Physics
A bullet with a mass 8 g is fired into a 2.5 kg pendulum bob initially at rest. It sticks to the bob and as a result the bob rises a vertical distance of 6 cm. Use the law of conservation of...

Asked by andrewmezzo on via web

• Physics
Two carts with mass of 4 kg and 3 kg move toward each other on a frictionless track with velocity 5 m/s. They collide and stick together; the speed of the final structure has to be determined. The...

Asked by andrewmezzo on via web

• Physics
The parachutist jumps from an airplane traveling at 250 km/h from a height of 500 m. When he lands his speed is 0 km/h. The horizontal distance covered by the parachutist has to be determined. This...

Asked by lxsptter on via web

• Physics
The ball has to be thrown on a ledge that is 5 m above the point from which it is being thrown and 60 m away. Let the speed at which the ball is thrown be v and the angle with the horizontal at...

Asked by lxsptter on via web

• Physics
Using Newtons second law of motion F = ma to the motion of the base ball `-390 = 0.19xxa` `a = -2052.63m/s^2` Negative sign is for deceleration. Using `V^2 = U^2+2aS` `0 =...

Asked by user3012661 on via web