# Science Homework Help

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This is a magnetic dipole. A magnetic dipole in a vacuum radiates an average power by the following relation. `ltPgt =(mu_0 m_0^2 omega^4)/(12 pi c^3)` `mu_0` is the magnetic permeability of a...

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After the switch is closed, the charge on the capacitor decreases as `Q(t)=Q_0e^(-t/(RC))` The initial energy of the capacitor is `U=Q_0^2/(2C)` So we want to solve for a time such that...

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• Science
This is essentially the problem of the simple pendulum applied to a current loop. The dipole moment p will want to align itself to an external magnetic field. The torque is: `tau=m xx B=-iaB...

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The magnetic field produced by a current carrying wire is: `B=(mu_0 I)/(2pi r)=(mu_0 I)/(2pi d)` Then use the lorentz force law per unit length is `F/L=q/L(v xx B)=lambda (v xx B)=(lambda*v xx...

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Here we need the conservation of momentum law. I suppose that before the explosion the block was in rest thus its momentum was zero. The law states that after the explosion the total momentum of...

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There are 4 forces acting on the block:gravitational force `mg` downwards,the force `F_0` downwards,the reaction force `N` upwards,the friction force `F_f` horizontally. The net force `F_(n et),`...

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There are three forces acting on the lead cube:gravitational force with the magnitude `Mg` downwards,buoyant (Archimedes') force `mg` upwards,lifting force of unknown magnitude `F` upwards. Here...

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I will solve this problem in a general way that would work for any one body parabolic, elliptic or circular orbits. The total energy of an arbitrary classical orbit is derived from its Lagrangian....

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We must apply conservation of relativistic 4-momentum, `P^(mu)=[E_(t o t)/c,p]` . Where` p=gamma*mv` is the relativistic spatial momentum. `P_i^(mu)=P_f^(mu)` `P_(i,1)^(mu)+P_(i,2)^(mu)=P_f^(mu)`...

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• Science
Use conservation of linear momentum. `P_i=P_f` `mv_(m,i)=m v_(m,f)+M v_(M,f)` (1) `m(v_(m,i)-v_(m,f))=M v_(M,f)` Use conservation of kinetic energy since this collision is fully elastic....

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• Science
Every substance is comprised of molecules, atoms, and/or other subatomic particles of that substance. These particles are in constant motion, colliding with each other and perpetually moving. These...

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Human understanding of atomic theory has developed vastly, thanks to the contributions of several scientists whose work spanned the early 1800s through the 1920s. The work of Dalton, Thomson,...

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Mitochondrial DNA is passed from mothers to offspring. Fathers don't, as a rule, contribute this kind of genetic information to the next generation. Currently, scientists don't know for certain...

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• Science
Distillation is a process by which a solution is heated, thereby utilizing evaporation to separate a liquid solvent and solid solute. A common type of solution is an aqueous solution, wherein a...

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Friction is resisting force - a type of force that resists movement. The type of friction that resists movement between two objects in contact with each other is dry friction. There is dry friction...

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Take note that in speed-time graph, the area under the curve represents the distance traveled. So to determine the distance traveled at t=2, consider the bounded region from t=0 to t=2. (See...

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• Science
The scientific method is a logical method for problem solving. Generally, scientists will pose a concise question about an area of interest. Next, they will conduct research to find out what is...

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The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction or a physical transformation. Hence, a short answer to the question is - yes, mass is...

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• Science
The ancient Greeks hypothesized that all physical structures were made up of smaller particles too small to detect with the human eye. In the early 19th century, scientist John Dalton refined the...

• Science
The Kinetic Theory of Matter states that an object is made up of tiny particles - atoms or molecules - that are in constant motion. A book is well-defined - it has a certain volume and a certain...

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It might seem natural to assume that your hypothesis is wrong, and therefore rethink your hypothesis. In fact, in a popular article for LiveScience (see link below), that's exactly what the author...

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• Science
A chain fountain is the name given to the phenomenon where a chain flows upward against gravity and pours out of its container. This might appear illogical and almost magical, but it is governed by...

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• Science
Unbalanced forces occur when the net force on an object is not equal to zero. When an unbalanced force occurs, a change in velocity is created. That change in velocity might be that the object...

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The complete ionic equation for a chemical reaction involving ions is to break each species into its component ions and show what each ion does. The net ionic equation focuses only on the ions...

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It's likely that you can cut back on your use of many resources. For instance, The Economist reports that the average American uses the paper equivalent of 5.57 forty-foot tall trees each year. By...

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When potential energy and kinetic energy are combined, they indicate total mechanical energy. Mechanical energy is the energy that an object has due to its motion and/or due to its position....

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• Science
Heat is a form of energy produced by the sun, but how is it created or emitted? The sun is a star, and like Earth, is composed of several layers of matter. Unlike the outermost layer, or...

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The four elements occurring in the greatest amount in the human body are oxygen, carbon, hydrogen, and nitrogen. Rather than existing by their lonesome self, they typically occur as an element in a...

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Scientists utilize measuring equipment that is calibrated for accuracy. This minimizes the margin of error and therefore enables accurate comparisons of matter. The ability to accurately evaluate...

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History provides several examples of factors that may hinder or delay interaction between groups of people. One example that is becoming less and less of a factor in our modern day and age is...

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Arthropoda is the largest phylum of invertebrates. But more than that, it is the largest phylum in the entire animal kingdom. According to the Encyclopedia Britannica, about 84% of all known...

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Lysosomes are a type of cell organelles that are unique to animal cells; they are not formed in the cells of plants. Lysosomes work in a system with endoplasmic reticulum and the Golgi apparatus....

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• Science
I will go into all three interactions with a single example because all three interactions can occur one right after another. Suppose that your brother locks himself in his bedroom, and you have...

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• Science
Hello! Probably a body moves with a uniform acceleration, denote it `a.` Then the speed changes uniformly, `V(t) = V_0 + a t,` where `V_0` is the initial speed and `t` is the time in seconds since...

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The organelles that are visible with a light microscope often vary based on the type of cell you are observing. For example, is it a plant or animal cell? What kind of plant or animal? A safe...

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The information that can be determined by observing the spacing of contour lines on a topographic map is relative steepness. It's relative steepness because without knowing the map's relief or the...

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Take note that acceleration is the rate of change of velocity with respect to time. So to solve it, take the difference between the initial and final velocity. Then, divide it by time it took for...

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The successful use of the scientific method depends on constructing clearly-stated, testable, falsifiable hypotheses. Assuming your hypothesis is correct, what should we expect to see? And what...

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This is one of the beauties of math and science. In this case, essentially, you pick.In organic chemistry, Huckel's rule pertains to aromatic molecules, meaning:- it must be cyclic- it must be...

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Diffusion and osmosis are both examples of passive transport. Passive transport does not require any energy to happen. It is a natural process that moves materials from an area of higher...

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That depends on what mean by "cyanobacteria," and what kind of photosynthesis you have in mind. Photosynthesis is the conversion of light energy into chemical energy that an organism can use as...

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The brain has a large system of cavities called ventricles. This system is called the ventricular system. The cavities do not contain any neural matter, but they are not empty. The ventricles...

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In the 1950s and 60s (and earlier) chemical pesticides were used extensively but untested. After Silent Spring was published by Rachel Carson in 1962, chemical companies including Monsanto hit the...

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The biggest thing is seeing the depth/spacing of the entire house.I use to be an engineer in the corporate world. So, we had all kinds of 2-D drawings of all the parts and assemblies we had....

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A scientist could measure the boiling point of a piece of metal the same way he or she would measure the boiling point of any other substance. You would subject the piece of metal to a measured...

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• Science
Hello! I suppose that both objects move along the same straight line towards each other with the uniform velocities. Also I suppose that they do not lose energy during the collision (this is called...

• Science
Yes, plants need and use oxygen to process glucose. Not every plant cell has access to sunlight energy in order to perform photosynthesis. In order to make energy in those cells, the plant must...

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• Science
You are talking about different elements of the food chain. Producers (autotrophs) are plants that utilize the power of sunlight to produce their own food. Decomposers are bacteria, molds, and...

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