Mechanics

The net force acting on an object is the combination of all individual forces acting on it. It is the vector sum of all forces, taking into account their magnitudes and directions. The net force determines the acceleration of the object according to Newton's second law of motion.

Cover your face, now... a sneeze. Incidentally, when you sneeze, it is impossible for you to keep your eyes open by force of will. Your eyes will close.

the frequency of a sound wave is higher if its wavelength is shorter

0. An object in equilibrium has constant velocity, which makes its acceleration 0. Since net force=mass times acceleration, this would make the net force zero.

Note that there could be multiple forces acting on the object, but since it is in equilibrium they would have to be equal and opposite in direction, to cancel all of the forces out. This would make the net force zero.

Yes, an object at rest can have forces acting on it. The vertical forces acting on an object at rest would include gravity pulling it downward and the normal force from a surface pushing it upward to balance the force of gravity.

Inthe kicking force, kinetic energy is acting on the ball together with Gravitational Potential Energy. Whereas the part where aother force is acting on iit while the ball is not moving is alsoocontrolled by gravitaitional potential energy.

In order for a body to escape the gravitational pull of the Earth, it needs to be thrown up with an initial velocity equal to or greater than the escape velocity of around 11.2 km/s. This velocity allows the object to overcome the gravitational pull of the Earth and continue traveling away from it indefinitely.

The ideal refrigerant has good thermodynamic properties, is noncorrosive, and safe. The desired thermodynamic properties are a boiling point somewhat below the target temperature, a high heat of vaporization, a moderate density in liquid form, a relatively high density in gaseous form, and a high critical temperature. Since boiling point and gas density are affected by pressure, refrigerants may be made more suitable for a particular application by choice of operating pressure. Corrosion properties are a matter of materials compatibility with the components used for the compressor, piping, evaporator, and condenser. Safety considerations include toxicity and flammability.

Usain Bolt has the highest recorded footspeed at 27.44 miles per hour.

At 180 degrees the net force is at a minimum; the two are working against one another.

There is no such thing as 'an unbalanced force', any more than a trouser,

a scissor, a tweezer, or a clapping hand.

A group of two or more forces is balanced if the vector sum of all of them

is zero, or unbalanced if it's not.

When a group of two or more forces is unbalanced, then the object they

act on exhibits acceleration.

The British government was worried that passengers traveling faster than 20 miles per hour on a locomotive would suffocate. This concern was due to the belief that high speeds would create a lack of oxygen inside the train cars, putting passengers' lives at risk.

23 miles per hour is approximately the fastest a human has run.

Yes, predictability is a property of gases. Gas behavior can be described using equations of state that allow scientists to predict how gases will behave under different conditions of pressure, temperature, and volume. This predictability is essential for many applications in chemistry and physics.

Using the equation for acceleration a = F/m, where F is the net force and m is the mass, we can find that the acceleration of the box is 2 m/s^2. Using the equation v = at, where v is the final velocity, a is acceleration, and t is time, the speed of the box at the end of the 5 second interval is 10 m/s.

After 12 seconds, a car traveling at 87 miles per hour would have traveled approximately 1,520 feet. This can be calculated by first converting 87 miles per hour to feet per second, which is about 128 feet per second. Multiplying this by the number of seconds gives the distance traveled.

Sound waves can be produced by materials such as air, water, metal, wood, and other solid objects. When these materials are disturbed or vibrating, they create compressions and rarefactions in their respective mediums, which propagate as sound waves through the air or other mediums.

Light waves are eletromagnetic waves and sound waves are mechanical waves. Additionally, a light wave is a transverse wave that does not require a medium through which to travel. Sound waves, on the other hand, are longitudinal waves where the source transfers the mechanical energy of the sound wave into the medium so it can travel.

By the vector sum of the forces. When the forces act exactly in opposite directions, you subtract one force from the other. When they act at some other angle, the calculation is a bit more complicated.

Sound power level (in decibels) is calculated by determining the sound pressure level (in decibels) at a reference distance from the source of the sound. The sound power level is based on the sound pressure level and the distance from the source, using the inverse square law to account for the spreading of sound waves in three dimensions.

Mach 3.5 is equivalent to approximately 2,685 miles per hour (mph).

Friction force is equal to the force applied only when the object is not moving or it is just beginning to slide. Once the object has started motion completely, it means that the force applied has exceeded the frictional force

Pitch corresponds to the frequency of a sound wave. A higher frequency results in a higher pitch, while a lower frequency results in a lower pitch.

The law of unbalanced forces states that when two forces acting on an object are not equal in magnitude and opposite in direction, the object will accelerate in the direction of the greater force. This is described by Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Cars can go up to 500mph...Not about this question though but a horse can go 60mph that's fast!