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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 are the units of the coefficient of friction?

The coefficient of friction is a unitless value because it represents a ratio of the force required to move an object over a surface to the weight of the object. Since it is a ratio of two forces, it does not have any units associated with it.

Sound waves are converted into mechanical movements by?

Sound waves are converted into mechanical movements by a device called a transducer. The transducer vibrates in response to the sound waves, which generates mechanical movement that can be used to create electrical signals. These electrical signals can then be further processed and utilized for various applications such as audio reproduction or energy generation.

Can an experiment that has several variables be used to explain theory?

Yes, an experiment with several variables can be used to test and provide evidence for a theory. By manipulating and controlling the variables, researchers can investigate the relationships between them and how they affect the outcomes, helping to support or refute theoretical predictions. However, it is essential to design the experiment carefully to ensure that the results are reliable and can contribute to a better understanding of the theory.

How artificial gravity is produced?

Through acceleration.

Gravity and acceleration are equivalent: they're each associated with a force that's proportional to the mass of the object. Amusement parks take advantage of this in "virtual reality" theaters: they simulate acceleration with gravity, by rocking the seats backward or forward to simulate speeding up or slowing down. Artificial gravity in space is the converse: simulating gravity with acceleration.

Acceleration can be linear or centripetal.

Continuous linear acceleration requires continuous energy input. The kinetic energy is proportional to the velocity squared. It's prohibitively expensive and doesn't allow you to stay any place for very long -- including near-earth orbit.

Centripetal acceleration is acceleration toward a center point -- it changes the direction of motion but not the tangential speed. Everything that rotates experiences "artificial gravity." That's why curves in roads -- especially high-speed race tracks -- have to be banked. For an object spinning in space without friction, it takes energy to start and stop the rotation, but it doesn't take any energy to sustain a constant rotation. Conservation of momentum keeps the object spinning. Constant centripetal acceleration (through rotation) is much more sustainable than constant linear acceleration, and it also allows the spinning thing to remain in orbit around the Earth or Sun or other planet.

You can find an artificial-gravity calculator on-line at: http://www.artificial-gravity.com/sw/SpinCalc/

You can find more information at: http://www.artificial-gravity.com/

How are light waves and sound waves similar?

Light waves and sound waves are both forms of energy that travel in waves. They can both be reflected, refracted, and diffracted. However, light waves can travel through a vacuum, while sound waves require a medium, such as air, water, or a solid material, to propagate.

What is the difference between Gay Lussac's Law and pascal's principle?

Gay Lussac's Law states that the pressure of a gas is directly proportional to its temperature, when volume and amount of gas are held constant. Pascal's principle, on the other hand, states that a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and the walls of its container.

Does mass affect momentum?

Certainly it does. My question is why wouldn't mass affect momentum? Let us consider a baseball versus a bowling ball, rolling towards each other on a level floor. Now knowing that mass affects momentum, you can predict that when the bowling ball and the baseball collide, that the baseballs trajectory will be changed far greater than the trajectory of the bowling ball.

In other words, the bowling ball is hardly affected by the collision, because it is so much more massive than the baseball, thus carrying more momentum and having very little change in its direction after the collision, as opposed to the baseball being sent in a completely opposite direction of which it was rolling before the collision.

How many mph can a bus go?

Well, first of all what kind of bus. It depends on the type and manufacturer as well as model of the bus. A school bus will barley do 65 mph in general, while a city bus might do 75-80 mph. A grey hound type bus will easily do 80 mph.

How would you compute the resultant velocity given a linear velocity and an angular velocity?

by using trig. So draw a triangle out with the given information. for example 1 line is 12m/s, another line is Um/s (u for unknown) and one line is resultant velocity. add your angle in and use trig to work out what you want.

How fast is 200kmph im mph?

200 kph = about 124.3 mph
200 kilometers per hour is 124.27 miles per hour.

How many mph does a bugatti go?

400MPH

LOL it could dp only 263 mph but it's limited to only 258 because if it went beond 263 the tyres would burst and/or the car would of take off do the the g-gorces and central gravity

Relationship between location of the center of the gravity and stability?

If you drop a line straight down from the center of gravity of the bridge and it falls inside the base of the bridge, the bridge is in stable equilibrium; it will balance. If it falls outside the base, it is unstable.

How do you drop an egg using a parachute - without cracking the egg?

How about use a plastic cup drill holes on both sides use a string put through the holes tie the ends to a plastic bag and, voila, a parachute for the egg.

More Information:

The parachute must be big enough and of appropriate material to slow the fall of the egg and the parachute. Also, a nice soft field might be a better landing zone than a paved parking lot. Some trial and error experimentation will probably be necessary to get the right chute area to weight ratio. Don't start with the egg.

Can your sneeze go up to 100 miles per hour?

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What was mike's average velocity in miles per hour when mike ran ten laps around his school's one fourth mile track in 15 minutes?

Mike's average velocity was 4 miles per hour when he ran ten laps around the school's one-fourth mile track in 15 minutes. This is calculated by first finding the total distance he covered (10 laps * 0.25 miles per lap = 2.5 miles) and then dividing it by the total time taken (15 minutes = 0.25 hours).

Difference between homogenous and heterogenous mixtures?

In a homogeneous mixture the components are spread evenly throughout one another and any two random sample of the mixture will be identical.

In a heterogeneous mixture the components remain separated into "phases" and the composition of the mixture varies throughout.

For example, in muddy water the soil particles remain distinct from the water.

A current carrying solenoid tends ot contract why?

A current-carrying solenoid contracts due to the magnetic fields created by the current. The interaction between the magnetic field produced by the current and the magnetic field within the solenoid causes a net force on the solenoid itself, resulting in contraction. This phenomenon is described by the Lorentz force law.

What do we call the tendency of a object to stay at rest or to stay in motion?

We use the term inertia to describe the resistance of an object to any change in its motion. If an object is not moving, it doesn't want to move. If it is moving, it doesn't want to change is speed or the direction it is moving. This is covered by Newton in his laws of motion.

What is 7ft pounds of torque measured in inch lbs?

To convert 7 ft-lbs to inch-lbs, you multiply by 12 (since there are 12 inches in a foot). Therefore, 7 ft-lbs is equal to 84 inch-lbs of torque.

How long does it take to boil 2 gallons of 70 degree fresh water with 12500 BTU at sea level?

A BTU is a unit of energy, and (assuming you mean degrees Fahrenheit) 12500 BTU is not enough energy to boil two gallons of water. Doesn't matter if you put it in within the space of a second, or spend an hour doing it. That's not enough energy.

What is 4 hp in mph what is 4 hp in mph?

Horsepower (hp) is a unit of power, whereas miles per hour (mph) is a unit of speed. There is no direct conversion between horsepower and miles per hour because they measure different things. Horsepower tells you how much power an engine produces, while miles per hour tells you how fast something is traveling. The speed of a vehicle in mph depends on various factors such as engine power, weight, aerodynamics, and gearing.

Why is it necessary to mention the axis of rectangular bar while calculating the moment of inertia?

An object rotating about its long axis will have a different moment of inertia than when it is rotating about its short axis.

A solid disk will have a different moment than a washer, and there are formulas derived for calculating the moments of many common shapes.

What is a thrust for the jet engines?

Thrust is the force produced by a jet engine or any propulsion system that propels an aircraft forward. It is generated by expelling high-velocity exhaust gases in the opposite direction to the desired motion, following Newton's third law of motion. The amount of thrust generated by an engine directly affects the speed and performance of the aircraft.

How does the phenomenon of interference play a role in the production of bow or shock waves?

Interference occurs when two or more waves overlap and either reinforce or cancel each other out. In the case of bow or shock waves, interference can amplify the pressure fluctuations and energy of the waves, resulting in the characteristic patterns and intensities found in these types of waves. This interference phenomenon is crucial in understanding the complex dynamics of wave propagation in fluid dynamics.