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Mechanics
Mechanics is the branch of physics that deals with the interactions of objects and forces in the observable world. Questions asking about projectile motion, conservation of energy, and calculus based mechanics are perfect for this topic, but questions about repairs that a mechanic would do belong in our vehicles categories.
2,416 Questions
What is a quality determined by the speed of vibration of sound waves?
Pitch is the quality determined by the speed of vibration of sound waves. Faster vibrations result in higher pitch, while slower vibrations result in lower pitch.
What are similarities and differences between a sound waves and water waves in terms of medium?
Similarities: Both sound waves and water waves require a medium (air for sound waves, water for water waves) to propagate. They both travel in a wave-like motion, transferring energy without the physical movement of the medium.
Differences: Sound waves are longitudinal waves that move through compression and rarefaction of molecules in the medium, while water waves are transverse waves that move through the oscillation of water particles. Sound waves propagate through air or solids, while water waves propagate through liquids.
A hill itself is not an unbalanced force, but it can provide a force due to gravity that acts on objects. If an object is on a hill, gravity is pulling it downward, creating a force that may result in unbalanced forces in certain situations.
What hapPens to the net force of the object if it is at rest?
If an object is at rest, the net force acting on it is balanced - meaning the forces pushing in one direction are equal to the forces pushing in the opposite direction. This results in a net force of zero, keeping the object stationary.
What is the electrical method to determine the specific latent heat of vaporisation?
One way to determine the specific latent heat of vaporization using electricity is to pass a known electric current through a resistor immersed in a liquid until it vaporizes. By measuring the amount of energy supplied through the electric current and the resulting increase in temperature of the liquid, the specific latent heat of vaporization can be calculated using the formula Q = I^2Rt, where Q is the energy supplied, I is the current, R is the resistance of the resistor, and t is the time taken to vaporize the liquid.
Does Water display surface tension?
Surface tension of water is the physical property of hydrogen bonding that makes the water molecule. The way that this works is that a water molecule (H2O) is a polar molecule. This is because the oxygen has a much higher electronegative value than the hydrogen. This means that the oxygen gets a lot higher 'share' of the shared electrons than the hydrogen does. This gives oxygen a very high partial negative charge, and the hydrogen a very high partial positive charge. Because of these high partial charges on each end of the molecule, they are very highly attracted to each other
This makes a strong type of intermolecular force called a hydrogen bond. The hydrogen bond 'pulls' the water molecules towards each other. So when in the centre of a water molecule the hydrogen bonds go in every direction. But when they are on the outside of a mass of water they are attracted only by molecules inside the mass of water. This makes a 'film' over the surface of the water.
Does a mirror reflect sound with less distortion than a wall?
yes. A mirror reflects sound with better fidelity than a wall because its surface is harder than most walls.
More Information:
A surface may be considered "smooth" if the largest feature of its texture is smaller than about 1/20 of a wavelength. Most walls would easily pass this test. Further, the rigidity of a wall is important in the reflection process. A smooth concrete wall would reflect sound better than one of wood, and that in turn would be better than sheet polystyrene foam.
Why would all the sugar not dissolve in a glass of tea?
In a Solution i.e your tea, only so much sugar can Dissolve. If you put loads of sugar into your tea, it can become a saturated solution. This means that the excess molecules of the sugar have no more room to dissolve into the tea, therefore it just sets at the bottom like sand.
More Information:
It is possible that enough sugar was added to the tea to saturate it, at which point no more sugar would dissolve, but that takes a lot of sugar. So, it is more likely that more time was needed for the sugar to dissolve. This process can be hastened by inverting the sugar (by adding a bit of lemon juice and/or corn syrup [glucose])
When the net force is zero the forces acting on an object are?
They are either non-existent or else balanced.
What is the net force when you combine a force of 7 N North with a froce of 5 N South?
7 N North is up and 5 N South is down; 7 -5 = 2 N North
Does an isolated system have net force acting on it?
Even if it does the net force acting on it should be zero. That's why it's called isolated.
What is the forces that produce a net force of 0 N on an object?
Any pair of forces that has the same magnitude (strength) and opposite direction.
For example, when putting an object on atablet (a puppy)
Gravity acts upon the puppy to pull it down but it doesn't go down because there is a force that the table is acting on the puppy, with the same magnitude as the gravity but the direction is upward.
=> equilibrium forces.
Why do woolen blankets keep us warm than cotton sheets?
Wool is a better insulator than cotton because of its natural crimp, which creates air pockets that trap heat. This insulation helps to retain body heat and keep you warm. Additionally, wool fibers can absorb and release moisture, helping to regulate body temperature and keep you comfortable in a wider range of conditions than cotton.
When the net force on an object is zero what will the object in motion do?
The object will remain at rest if it was at rest or will maintain its motion with uniform velocity if it was moving.
What is meant by a volume of STP?
Volume of a gas at STP (standard temperature and pressure) refers to the volume that a gas occupies when measured at a temperature of 0 degrees Celsius and a pressure of 1 atmosphere. This volume is typically given in liters or cubic meters.
What is the dimensional equation of speed?
Dimensional analysis allows you to convert between non-alike units of measure. Set up your given measurements as a proportion, and solve for the location that is standing in for the missing value.
What is the speed of an object that travels 45 meters in 15 seconds?
The speed of the object would be 3 meters per second (45 meters ÷ 15 seconds).
What type of interference causes the crest of the wave to decrease or cancel out?
Destructive interference causes the crest of a wave to decrease or cancel out. This occurs when the crest of one wave aligns with the trough of another wave, resulting in a reduction or cancellation of the overall amplitude.
What is the net force when you combine a force of 7 N north with a force of 5 N south?
2 Newtons to the North
7-5=2
Simple math =)
What happens if the sum of all the forces acting on a moving object is zero?
If the sum of all the forces acting on a moving object is zero, the object will continue to move at a constant velocity in the same direction. This is described by Newton's First Law of Motion, which states that an object will remain in its state of motion unless acted upon by an external force.
How do you know if the net forces on an object are balanced or not?
If the net forces on an object are balanced, the object will remain at rest or continue to move at a constant velocity. You can determine if forces are balanced by calculating the sum of the forces in each direction (e.g., horizontal and vertical) and comparing them. If the sum of the forces in each direction is zero, the forces are balanced.
What is the net downward force on an object?
The net downward force on an object is the total force acting on the object in the downward direction after considering all forces, such as gravity and any applied forces, acting on the object. It is calculated by summing up all the individual forces acting downwards on the object.
It's a perfect example of centrifugal force, and of Newton's First Law of Motion.
As the car travels forward, all of the objects inside of it (including the driver and passengers) acquire a certain momentum; known as inertia. When the driver then acts to change the direction of the momentum (by suddenly turning left) the inertia of everyone and everything inside the car resists the change: they want to keep going forward.
The net result is that as the car turns left, everyone inside the car tries to got to the right, which is closest to the direction of the original force. The driver feels the change as well, but he or she knows what's coming, and has unconsciously braced for the turn. The passenger, however, may be surprised by either the timing or the quickness of the turn, and as a result notices the change more forcefully.
What is the net force on an object if a force of 7 N and a force of 5 N south act on the object?
Forces are vector quantities. Draw a diagram with the forces on it in the correct direction. If both forces are acting in the same direction, ie South then add them.
12 N South. (Points of the compass take a capital /uppercase letter)
How do you figure out net force for opposing forces?
If the opposing forces are pulling exactly opposite of each other, then take the difference of the magnitudes of the two forces (subtract the smaller value from the larger value), and the direction vector of the resultant force is in the same direction as the larger force.
