When you weigh yourself, are you actually reading the support force acting on you, or are you really reading your weight?
As the car moves down the hill, you'll notice that the car's kinetic energy increases. As a result, what happens to the car's potential energy?
Which of the following is true of semiconductors? A. Exposing a crystal of a semiconductor to heat or light starts displacing valence electrons, which then move throughout the crystal. B. A material is classified as a semiconductor if its resistance to the flow of electric current is too low to permit it to be called a conductor. C. Neither free electrons nor holes are considered charge carriers in a semiconductor. D. Gold and silver are important semiconductors
Answer: A -material is classified as a semiconductor if its resistance to the flow of electric current is too low to permit it to be called a conductor is true about semi-conductors.
semi conductor are more conductive than a non metal and less conductive to metal.
If two boats are traveling on paths that will cross, what determines which boat is the give-way vessel?
Answer: In order to determine which boat is a give-way vessel and which boat is a stand-on vessel, one must look at the direction from which the other vessel is approaching.
If a vessel appears to come from the right side, then that vessel is the stand-on vessel and the other is the give-way vessel. Therefore, the give-way vessel must take instant action to avoid the crash.
At night, the lights are used for communication purpose, of which the green light depicts the starboard side and the red light depicts the port side.
Aman tosses a jart upward with a velocity of 14.1 m/s a 60° angle
hold on let me check my answer
What is the base metric unit for measuring mass?
Rosa goes into the hospital with her son. Her son does not recall what happened so Rosa describes the following scene to the doctor.
“He was sitting on the couch watching a movie when his muscles got really tense. He started to drool and grunt and then started convulsing. He then urinated on himself. After a few seconds, he stopped convulsing and complained of being very tired.”
What most likely caused Rosa’s son to have that experience?
a metallic taste
The answer would be a seizure because the child showed signs of seizure such as shaking drooling and urinating on himself
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a)if a sample of gold with a mass of 7.583 g, is pressed into a leaf of 3.061 μm thickness, what is the area (in m2) of the leaf? (b)if, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 μm, what is the length (in m) of the fiber?
A 0.450-kg hammer is moving horizontally at 7.00 m/s when it strikes a nail and comes to rest after driving the nail 1.00 cm into a board. (a) calculate the duration of the impact. (b) what was the average force exerted on the nail?
(a) The duration of impact of the hammer is .
(b) The average force exerted on the nail is .
When hammer hit the nail it got impacted by the hit and get into the board. This insertion in the board take time which is called duration of impact. The force exerted on the nail is directly proportional to the acceleration of the nail.
The speed of hammer is .
The distance of nail which is inserted in the board is .
The mass of the hammer is .
The rate of change of displacement of a body in unit time is called speed of the body. It is a scalar quantity.
The expression for the speed of the body is given as.
Rearrange the above expression for the time.
Here, is the distance covered, is the speed of body and is the time.
According to Newton’s second law of motion “the rate of change of momentum is equal to the force applied on the body.”
The expression for the newton’s law is given as.
The expression for the acceleration of the body is given as.
Here, is the initial velocity and is the final velocity.
Substitute for and for in equation (1).
Substitute for , for and for in equation (3).
Substitute for and for in equation (2).
Thus, the duration of impact is and the force exerted on the nail is in the opposite direction.
1. Motion under friction brainly.com/question/7031524.
2. Conservation of momentum brainly.com/question/9484203.
3. Force on a body brainly.com/question/6125929.
Acceleration, force, acceleration due to gravity, friction, normal, weight, mass, motion, impact, nail, hammer, acceleration, duration of impact, 0.450 kg, 7 m/s, 2205 N,1.429*10^-3 sec, 1.43*10^-3 sec.