# Physics Questions and Answersby Aristotle

• Physics
Physics is the foundation of science. It connects mathematics to the real world in applicable and useful ways. There are many carrers that involve and utilize aspects of physics such as...

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In typical simplified projectile motion, there are two axes of movement: vertical (y-axis) and horizontal (x-axis). The object flying through the air is in free-fall, meaning the net force acting...

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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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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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Using laws of linear motion; v = u+at 20 = 0+a*10 a = 2 m/s^2 For angular and linear motion; a = ralpha alpha = a/r alpha = 2/((62/100)/2) = 200/31rad/s^2 From angular motion; theta =...

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Time 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...

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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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As the problem stated, we first need to figure out the spring constant. Hooke's Law says that the spring constant can be calculated by dividing the force by the distance of movement. It takes 15...

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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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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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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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The ball is thrown horizontally with an initial speed of 10 m/s and it hits the ground after 4 seconds. When the ball is released it moves in the downward direction due to the gravitational...

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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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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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The 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...

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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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Actually, in real lenses, the ray going through the center of the lens does NOT go straight through. It refracts like every other light ray. On entering the lens from air, the light ray is bent....

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Some students may feel that physics isn'important to them. They may not find it interesting or useful. Of course, one day they will discover that physics is everywhere. If you are having trouble...

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When light rays reflect, the angle of incidence (the angle from which the ray is different from the normal of the surface, or the imaginary line coming straight out of the surface) is equal to the...

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If I were to suggest it would be beneficial if you would pursue Chemistry. Apparently you have made an option for two very related sciences. along the course of which ever path you've choses, you...

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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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Impulse is the change in momentum of an object. There are two impulses that your egg design will have to deal with. The first impulse is from the drop itself. Its momentum will increase due to the...

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This uses unit-analysis, a skillset of dimensional analysis. 93000000 miles -> ? m Convert to scientific notation 9.3\times10^7 mi It is known that 10^-2 m = 1 cm 2.54cm = 1 \text(in)...

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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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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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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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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...

• 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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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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The football player runs 11m in a direction N20E. He then changes direction and then runs 9m towards the east. To find the displacement of the player, divide the initial 11m run in the direction...

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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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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...

• Physics
Here we have to use the velocity equations. S = Ut+1/2*a*t^2 If we put this equation from the time that starts acceleration to end of 12 seconds, S = distance travelled U = 15m/s a = 21m/s^2 t =...

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If 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....

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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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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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An object is shot from a canon at a 90 degree angle; it travels 6 m in 6.76 seconds. The object is being shot vertically upwards. The acceleration of the object due to the gravitational force of...

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Here we have to memorize the Newtons laws of motion. In his first law of motion of an object he has stated that If the net force acting on a body is zero then the body is at rest or moving in a...

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Here what we need to recognise is the first law of Newton. His first law of motion says that an object will be at rest or travelling in constant velocity until an external force applied on it. so...

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The marble is shot at an angle of 30 degrees to the horizontal and has an initial velocity of 40 m/s. The initial velocity of the marble can be divided into 2 components. The horizontal component...

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For the motion of the ball we can apply equations of motion. Initial velocity (U) = 10m/s Final velocity at top (V) = 0m/s Acceleration due to gravity (g) = 10m/s Since the ball stops at maximum...

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The 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....

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Friction 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...

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Diffraction 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...

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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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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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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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Snell's Law: n_1sin(\theta_1)=n_2sin(\theta_2) let n_1 = 1.0 (air) and n_2 = 1.6 So, \theta_1 = 63^o Solve for \theta_2 \theta_2 = sin^(-1)(n_1/n_2*sin(\theta_1)) \theta_2...