# Physics Essays

: No matter where and what we are doing , there is always a darkside for all objects and Knowledge known to us that keep haunting us in our nightmares and day dreams as Unanswered Questions. As a common tendency we all never like to be reminded from those Unknown Unanswered questions,but for some the…

C 10 cm STT 1 What is the length of the hypotenuse of this triangle? ( 6 and 8 cm) A 6 cm b 8 cm C 10 cm D 12 cm E 14 cm B STT 1.1 Which car is going faster? A or B? Assume they are equal intervals of time in between…

What is the x component of A? ? Ax = 2.5 What is the y component of A? ? Ay = 3 What is the y component of B? ? By = -3 What is the x component of C? ? Cx = -2 In ordered pair notation, write down the components of vector B?…

operating with displacements according to the rules for manipulating vectors leads to results in agreement with experiments We say that the displacement of a particle is a vector quantity. Our best justification for this assertion is D Ch 3 #2 The vectors a, b, and c are related by c = b – a. Which…

B) an automobile battery Which has the greater mass? A) a king-size pillow B) an automobile battery mass A kilogram is a measure of an object’s D) all of these Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much A) inertia. B) mass. C) volume. E)…

D An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object A) travels 2.0 m in every second. B) is traveling at 2.0 m/s. C) is decreasing its velocity by 2.0 m/s every second. D) is increasing its velocity by 2.0 m/s every second. D Suppose that an…

1) x = -1.5 For which of the values below is x > x^3? 1) 3.16 x 10^7, 86 400 One year is about ____ seconds while one day is exactly ____ seconds. 1) 3 800 Calculate (0.82 + 0.042) x (4.4 x 10^3), keeping only significant figures. 1) 0.13 cubic feet A cereal box…

-,+ An elevator is moving downward when someone presses the emergency stop button. The elevator comes to rest a short time later. Give the signs for the velocity and the acceleration of the elevator after the button has been pressed but before the elevator has stopped. +,- A child throws a baseball directly upward. What…

William Gilbert The earliest ideas of charge were the result of experiments by: newtons Common units of electrical force are: lack of electrons A positive charge means: are charged with respect to the earth Lightning is formed when clouds: the sea, air, metals Charges exist in: has essentially no free electrons An insulator is a…

dimensions of B = dimension of x/(dimension of t)2 = L/T2 or LT-2 (a) Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B? “x” is again “displacement”, so replace it with “L”: L = A sin(2?ft). They tell you that…

Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. Newton’s third law of motion A quantity that has both magnitude and direction. Examples are force, velocity, and acceleration. Vector quantity A quantity that has magnitude but not direction. Examples are mass, volume,…

e. none Which of the following is a vector quantity? a. mass b. density c. speed d. temperature e. none of these e. horizontal component of projectile motion Which of the following is not an example of accelerated motion? a. vertical component of projectile motion b. circular motion at constant speed c. a swinging pendulum…

The experiments demonstrate Newton’s first law because the fans act as the unbalanced force. If the fan is blowing in one direction, it will make the cart accelerate, and if there are two fans blowing in opposite directions, the cart will remain at a constant velocity because it is a balanced force. I Activity B:…

Poem Analysis “Cartoon Physics, Part 1” Nick Flynn centers “Cartoon Physics, Part 1” around childhood innocence. He very strongly urges not only parents, but anyone around a young child to not force upon them knowledge they do not need to know. Flynn captures the simple kid mind and harsh reality with tone, imagery, figurative language,…

Assume that air resistance is negligible and that the magnitude of the acceleration due to gravity is . What shape is the trajectory (graph of y vs.. X) of the shells? ANSWER: straight line parabola hyperbola The shape cannot be determined. For two shells fired at the same speed which statement about the horizontal distance…

Uniform Circular Motion Uniform Circulated Motion is defined as a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation (and constant speed), or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a…

Cars contain several different types of safety features. These numerous safety features all have their own significance to the driver, as well as to the passengers. The purpose of this report is to show and express how physics is involved in automobile collisions and similarly how it is used to prevent injuries during accidents. Isaac…

Centripetal force F is the net force causing the centripetal acceleration of an object performing uniform circular motion. Its magnitude is given by the equation: F = Mrs. When an object is whirled in horizontal circular motion in mid-air with a piece of string (as shown in figure 1 above), the centripetal force on the…

Aim To determine the critical angle of glass using a glass block Principle and Hypothesis The Kennel’s Law of Refraction says that – At the boundary between any two given materials the ratio of the sine of the angle of incidence and the angle of refraction is constant for any particular wavelength. The refractive index…

Purpose: To practice direct and indirect measurement Introduction: Do you think you could measure the average thickness of a sample of M&Ms without directly measuring selected M&Ms? The answer is “yes,” and in this activity you will make direct and indirect measurements of the thickness of M&Ms. You will compare the results and evaluate the…

Effect IA Investigate the effect of the distance between each domino on the time taken for all the dominoes to fall Independent Variable: Distance, d/CM, between each domino. The distance d/CM is measured between the middle of one domino to the middle of the next domino Dependent Variable: Time taken for all the dominoes to…

I. Problem/Purpose “In this experiment we want to investigate . We will change constant” the II. Prediction and measure the while keeping the “We predict that the straws would take in all the impact force, it’s because the straws has many collapsing points. This would help sustain in the eggs inside. Ill. Materials * Sponge…

Math Exploration: The Physics Behind Equestrian Before this exploration begins, it is important to be informed of the definitions of many equestrian terms that will be used in this exploration. Equestrian: Of or relating to horseback riding or horseback riders. (Kirkland, Sarah) Walk: The walk has a distinct four beat rhythm. When the horse is…

Suppose you are in a dark room. Can you see the objects in the room? Can you see the objects outside the room? Explain your answer Q. Write the two laws of reflection. Q. Write two differences between diffused and regular reflection. Q. Write whether in each case diffused or regular reflection takes place. A)…

Interconnectedness’s around the world, cars are used throughout in most people’s everyday life. From Just going to the super market across the road, and going across the country boarder, cars are one of the most essential sources of item, to live a typical life style in developed countries. And although cars seem to look very…

A catapult is an ancient device used to launch heavy objects at targets during war. The catapult dates all the way back to 400 be when it was invented in the Greek town of Syracuse. The main types of catapults are Utrecht, mangoes, nonage and ballista. There are many more types of catapults also. Catapults…

A According to this website, what is the definition of “absolute zero”? NAS: Absolute Zero, is when the molecules of the object can no longer oscillate/shake, due to the temperature being too cold, that kinetic energy Is too weak to do anything. The time when the escalation is slowed to the point it can no…

Following of our actions in our daily life are parts of physics study. 1) When we walk or run, our motion is part of laws of mechanics and thermodynamics. 2) We eat food which undergoes chemical reactions producing heat energy which is converted into mechanical energy 3) Use of refrigerator, pressure cookers, washing machines, television,…

The Results of this experiment is Ballista Basic Information A Ballista was one of the siege engines used during the Medieval Era and was an invaluable siege attack weapon. The Ballista was used by both the attackers and defenders as an effective anti-personal weapon. For defenders the positioning upon the walls of a fortification would…

The purpose of this lab is to show how to calculate the average speed and acceleration in six different races. In order to find average speed you will need to use the formula s=d/t (s= speed, d=distance, t=time). On the other hand, for acceleration you will use the formula a= if-vi/t (a-?acceleration, if=final velocity, initial…