Answer:
0.58, 0.58, 0.58
Explanation:
Given vector, a = (7.9, 7.9, 7.9)
Unit Vector,
The magnitude
|a| = 13.68
The unit vector is (0.58, 0.58, 0.58)
The given sentence best describes: b. Newton's second law, the law of acceleration.
Newton's Second Law of Motion is also referred to as the law of acceleration and it states that the acceleration of an object or body is directly proportional to the force acting on the object or body and inversely proportional to its mass.
Mathematically, Newton's Second Law of Motion is given by the formula;
In this scenario, as a result of the mass possessed by the iron man on the left, it took more force to accelerate him than it took to accelerate the iron man on the right. Hence, the above best describes Newton's Second Law of Motion, which is also referred to as the law of acceleration.
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Answer:
Friction is the main factor which reduces the efficiency of a simple machine. Efficiency of a simple machine can be increased by reducing the friction. But oiling and greasing the machine is a useful way to increase the efficiency of a machine.
Explanation:
Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Oil is used to reduce friction between the moving parts of car engines. The use of oil makes engines more efficient. Another machine that loses input work is a bicycle.
Atoms of the same element having equal numbers of protons, but different numbers of neutrons is called isotope.
Crest is the part of the wave which does this.
A sound wave is the sample of disturbance resulting from the movement of strength visiting through a medium, including air, water or every other liquid or stable remember as it propagates far from the supply of the sound.
The sound waves are generated by a sound source, such as the vibrating diaphragm of a stereo speaker. The sound source creates vibrations in the surrounding medium. because the supply continues to vibrate the medium, the vibrations propagate far from the supply at the rate of sound, hence forming the sound wave.
A sound wave is not a transverse wave with crests and troughs, however alternatively a longitudinal wave with compressions and rarefactions.
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