# Science Homework Help

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

• Science
The most common example of an inclined plane is a ramp. All inclined planes are more commonly known as ramps. However, it should also be noted that not all ramps are inclined planes. Stunt ramps...

Asked by smart360 on via web

• Science
One less known of the contributions of Albert Einstein to physics is the orange model of the Earth. In this model the crust of the Earth is compared to the skin of an orange and the interior of the...

Asked by nbrit21 on via web

• Science
A torque of 12 N*m is applied to a solid, uniform disk of radius 0.50 m. As a result of this, the disk accelerates at 5.7 rad/s^2. If a torque T is applied to an object with moment of inertia I,...

Asked by guyunehye on via web

• Science
The cable car at a ski resort carries skiers a distance of 6.8 km. The cable which moves the car is driven by a pulley with diameter 3.0 m. It can be assumed that there is no slippage as the cable...

Asked by pokunerty on via web

• Science
The angular displacement of the wheel at time t = 0 is zero radians. The angular velocity of the wheel at time t = 0 is 28 rad/s. The constant acceleration of the wheel is -0.51 rad/s^2. As the...

Asked by kinehe on via web

• Science
An analogy is when two things are compared that are alike in some way. Adenine and thymine are complementary base pairs in the deoxyribonucleic acid molecule and they bond together. They are...

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• Science
Pri1003 is entirely correct. One of the points that bears emphasis here is the fact that "selective breeding" is entirely unique to, and confined, to humans, and is responsible for everything from...

Asked by Rose77 on via web

• Science
You need to evaluate the average angular velocity, under the given conditions, such that: `alpha = (omega_f - omega_i)/(t - t_0)` `alpha =(Delta omega)/(Delta t)` The problem provides the...

Asked by jdksdfskj on via web

• Science
a) You need to evaluate the angular displacement of the ball, using the following formula, such that: `theta = S/r` The displacement S = 10 m, and the radius r = 9 cm, hence, you need to convert...

Asked by pokinenn on via web

• Science
a) The initial angular speed is simply `omega_0 = 2*pi*F =2*pi*3600 rad/min =2*pi*3600/60 (rad)/(sec)=` ` =120*pi (rad)/(sec) ~~377 (rad)/(sec)` The initial angular speed is `120*pi` rad/sec b) The...

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• Science
In order for something to have weight, there are two requirements; It must have mass, i.e. it is composed of matter, not energy It must be in the presence of a gravitational field If an object was...

Asked by cutesuguna2012 on via web

• Science
Let the precipitation of solid KNO3 starts at T K. From the plot of lnK vs 1/T, `-(DeltaH^o)/R=-4504.4` `rArr DeltaH^o=4504.4*8.314=37449.6` J/mol And, `(DeltaS^o)/R=17.552` `rArr...

Asked by user8940074 on via web

• Science
Perception is defined in Merriam Webster as "the way that you notice or understand something using one of your senses". The moment we experience something, we perceived it since we are able to...

Asked by maxinerwilliams1962 on via web

• Science
The force `(GM_(earth)*m)/(R_(earth))^2` of the earth on mass m, has to balance the force `(GM_(moon)*m)/(R_(moon))^2` where `R_(earth)` = distance from the center of the earth to the point and...

Asked by berbs on via web

• Social Sciences
The acronym FASD actually stands for Fetal Alcohol Spectrum Disorder. This term covers a broad spectrum of negative health effects that can afflict people due to prenatal exposure to alcohol...

Asked by pashti on via web

• Science
There are several things that you need to consider in this experiment. First, we need to be sure that the solution is homogenous, meaning that all the KNO3 and K2CrO4 are dissolved in water at 75...

Asked by user8940074 on via web

• Science
A pest is defined as an animal or plant that is considered a nuisance to humans or damaging to human structures like houses. Let's take the first two examples, a grouse and a squirrel. Grouses...

Asked by Buddy2850 on via web

• Science
Weight is the force with which the asteroid pulls rock towards its center. Hence, from Newton's law of gravitation: `(GMm)/R^2=100` ..................(i) Where G=universal gravitational constant ,...

Asked by jennie2412 on via web

• Science
There are several ways to solve this; here are three. 1. Potassium chloride is soluble in water; diamond is not. Regardless of the size of the particles, diamond and potassium chloride both have a...

Asked by chaver on via web

• Science
Common salt, NaCl is an ionic compound completely soluble in water but insoluble in organic solvents like Dichloro methane or DCM. Butter is a covalent organic compound which is insoluble in water...

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• Science
1. A force F is applied on an object and object displaced from its initial position either in direction of force or in some other direction. Since displacement and force both are vector quantity so...

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• Science
Cathode ray experiment is made in order to observe the action of electrons in vacuum tubes. Generally this proves that negative particles actually do exist. In 1897, J.J. Thomson measured the...

Asked by van on via web

• Science
The fundamental frequency is given by speed = frequency x wavelength We know the length of the wave must be 0.860m, and the speed is 125m/s. 125 = 0.860 F 125/0.860 = F F = 145Hz The fundamental,...

• Science
A.We know that energy is being conserved according to the equation (PE + KE)i = (PE + KE)f for any two points along the path of motion. The person starts from the same height, and thus he starts...

Asked by mdjuebe on via web

• Science
The conservation of energy tells us that, in the absence of friction, the total amount of energy in the system will remain constant. Since the skier begins each trip at the same height, H, and ends...

Asked by kinube on via web

• Science
A. No. Because the energy that created is not of same type. Overall, the energy is conserved because we consider this Earth as an isolated system but the conversion is not fully one type. Meaning,...

Asked by kineuhee on via web

• Science
Epidemiology is the study of health and disease; specifically, the way that a population exists in a healthy state, or in a diseased state. Microbes refer to single-celled organisms. Thus,...

Asked by user8717988 on via web

• Science
Actually, NH4Cl and KOH will react with each other. NH4Cl contains the ammonium ion (NH4+). This is mildly acidic and will release a proton to produce ammonia (NH3). The hydroxide from the KOH...

Asked by mmcburney3 on via web

• Science
If the motion is performed in the absence of friction, then the mechanical energy (kinetic and potential energy) remains constant. This means that if you evaluate the sum of the potential and...

Asked by kineuege on via web

• Science
Assuming that the origin is located at the ground level this means that the first car is at zero height `h=0m` in first frame. Total energy of the first car is `E = E_p+E_k` and since for `h=0...

Asked by pokine59 on via web

• Science
In regards to point e) If KE = 0, then V = 0. I believe the KE is actually at a minimum, rather than 0, at this point. We might say that there is zero kinetic energy with respect to the vertical...

Asked by mundhye on via web

• Science
All matter can be classified as mixtures, elements and compounds. Mixtures – two or more substances that are not chemically combined with each other and can be separated by physical means. The...

Asked by user9085675 on via web

• Science
We can use the Boyle’s law in order to solve the problem. We know that pressure is inversely proportional to the volume of the gas. Having said that, the expression can be written as:...

Asked by goforrace on via web

• Science
Three facts about energy will help us solve this problem: Energy is conserved; without any loss to friction, the total energy will remain constant Potential Energy + Kinetic Energy at one point...

Asked by yutkiye3 on via web

• Science
a) The source of the force that is making the cart accelerating is the fan itself. The mechanism of the force is the following: the fan blows air in a direction opposing the motion of the cart....

Asked by pokune on via web

• Science
PCR stands for Polymerase Chain Reaction. PCR is a revolutionary technique that has allowed microbiologists to study particular regions of DNA, simply by making an enormous number of copies of that...

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• Reference
The acronym STD stands for sexually transmitted disease. STI stands for sexually transmitted infection, which is basically just another term for STD. An STD is a disease that is transmitted from...

Asked by monique06 on via web

• Science
The figure is attached below. b) Since the gravitational forces are conservative, the work done by them on a mass does not depend on the path taken by the mass, but only on the starting and ending...

Asked by pokine9 on via web

• Science
m= mass of the accidedent victim=74 kg A guide rope inclined to horizontal= 37 degree A guide rope inclined to vertical =(90-37)degree =53 degree The component of g, the acceleration due to gravity...

Asked by okine on via web

• Science
a) You should notice that the problem provides the force versus position graph, hence, you may evaluate the work done by the force calculating the area under the line. Hence, evaluating the work...

Asked by olkine on via web

• Science
Physics I (1 image)
The figure is attached below. a) The forces acting on the cart are the thrust force along the incline from left to right `F_t` , the normal of the plane on the cart (the force that is sustaining...

Asked by Tukiouytr on via web

• Science
There are many ways on how to compare an animal cell with the soccer team depending on the specific function of each organelles in the cell. Nucleus - is like the head coach. It commands the...

Asked by leejay on via web

• Science
"Going green" has more factors in its favor than the mere fact that it's trendy. Renewable resources are both a long and short-term advantage, if managed correctly, and resolve or diminish problems...

Asked by trocket34 on via web

• Science
Snails, clams and cephalopods are all class under the phylum Mollusca, a group of invertebrate animals. These three classes are distinctively different from each other based on certain...

Asked by unknow9333 on via web

• Science
A double replacement reaction takes place between two ionic compounds, and follows this pattern: `(A^+ B^-) + (C^+ D^-) -> (A^+ D^-) + (C^+ B^-)` The ionic compounds are just trading...

Asked by user9551564 on via web

• Science
First, it's important to recognize some subtle nuances in scientific vocabulary. It's fairly common for a word to refer to two completely separate things; in this case, "epidermis" can refer to the...

Asked by enotes on via web

• Science
Physic I (1 image)
Since the problem provides the acceleration that is a = -0.74 m/s^2 and the fan cart unit accelerates down on inclined plane, the force that acts along x axis is: `F_x = m*a = -m*g*sin theta` You...

Asked by kiueneji on via web

• Science
We need to deal with two aspects of this question: Work and Circular Motion. Work is equal to a force acting over a distance: W = Fd Circular motion is a lot like linear motion, but with the...

Asked by pokineye on via web

• Science
A. The free body diagram needs to show all the FORCES acting on the skater. It will not show her mass, velocity or acceleration by themselves. There are three forces acting on the skater after she...

Asked by Tukiye3 on via web