Tnpsc Group 2 Previous Year Model Questions and Answers Pdf. These Questions are frequently asked in TNPSC,TRB,RRB,Bank Exams and Entrance Exams. PHYSICS. Physics - 2. PHYS; Short Answer: A boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second. PHYSICS. TEST. PRACTICE. BOOK. This practice book contains one actual full- length. GRE Physics Test .. fourth of the number of questions you answer.
|Language:||English, Spanish, Arabic|
|Distribution:||Free* [*Registration Required]|
This is the general knowledge questions and answers section on "Physics" with Knowledge Physics quiz questions with answers as PDF files and eBooks. physics general knowledge objective questions answers mcq are important in ssc, upsc, ibps and competitive examination and entrance Current Affairs PDF. The List of 50 important Physics Questions and Answers is given here for download in PDF. Candidates those who are preparing for SSC CGL and all other.
So a gallon of boiling water weighs less 8. So fill up your car first thing in the morning when it should be the coolest, you'll get more pounds of gasoline. Except that most vehicle fuels are stored underground and are at a pretty constant temperature. Fortunately it's pretty cool down there Make it easy to remember; an ounce of water weights, about an ounce.
So an American pint, 16 ounces, weighs about a pound. And an American gallon, 8 pints, about 8 pounds.
Whereas an Imperial pint, 20 ounces; and an Imperial gallon, ounces, about ten pounds. Just like it says, up top.
The measurement is made at the point where the ball is when the trigger is squeezed and the contacts close to activate the unit. The gun responds in a "split second" by sending out a pulse, catching the return, and then comparing the two to discover the difference the Doppler shift. It is so fast that the ball doesn't travel very far in the time it takes the unit to respond and resolve the speed.
A standard planar mirror will not increase the energy contained in the rays that reflect off it. In fact, there will be some loss of energy since the reflective surface is not perfect. There is some reduction in the light's intensity as it passes through the mirror's glass and reflects off the backing surface.
Parabolic mirrors, on the other hand, focus and concentrate the light rays on a single point in front of the mirror, aptly named the focus. Although the energy is not amplified, it will be effectively increased because of the additive effect that will result when the light energy is concentrated. The body radiates energy through thermal conduction through the skin to the air, clothes, etc, around the body. A small amount of energy would also be radiated as electromagnetic radiation with a peak wavelength directly related to the Kelvin temperature of the skin.
Also very small amounts of other radiation are emitted due to naturally occurring radioactive isotopes in the body i. To write in scientific notation, you should first move the decimal point of the number to where the number is between 1 and 9. For example, change to 5.
Then count the number of places you moved the decimal. If you moved it left then the number is positive. If you moved it right then the number is negative. Finally times the number with the decimal point by 10 to the power of the number the decimal moved. The SEM has become more popular than the TEM as it can produce images of high resolution, greater clarity and three dimensional qualities and requires less sample preparation. How Is Specific Gravity Defined?
Specific Gravity, SG, is a unit less quantity that gives the scientist or engineers an idea of how dense a substance is compared to water. The density of water, which is one kilogram per liter at 4 degrees C , is assigned a SG of 1.
If a substance is denser than water, it will have a SG greater than 1. Let's say a substance has a density of 2. That means that its SG is 2. What Is A Neutron? A neutron is a subatomic particle; it is one of the building blocks of the atom. It has a mass of about 1.
Additionally, it has no electric charge, which is a distinctive feature. It is unstable when free in nature, and has a half life of about seconds.
The neutron could be said to be only "alive" to be part of an atomic nucleus as it ceases to exist after a while if left alone. When it wanders around loose, like after its release following decay event or a fission event, it may bump into another atomic nucleus and become captured by it.
This process is called - no surprise - neutron capture. It is, after all, a nucleon, as is a proton, both of which make up an atomic nucleus. The neutron is made up of two down quarks and an up quark. When a neutron decays, it releases a proton or, if you prefer, a hydrogen nucleus , an electron, and an antineutrino.
The common definition of 'light' visible is electromagnetic radiation visible to the human eye. It is only a small part of what is known as the 'electromagnetic spectrum' - which is the range of wavelengths of all possible electromagnetic radiation.
With more mass, you cannot accelerate yourself as much when you jump with the same force.
Imagine trying to jump with a small backpack full of sand strapped to your back. Your strength hasn't changed. That is, the amount of force you can deliver hasn't changed, but your mass has. You can't jump as high. All air travel takes the earth's rotation into account.
Flights from east to west take less time in absolute terms, having nothing to do with time zones. The reverse is true with west to east flights, and even north-south flights must calculate the amount of rotational deviance while the aircraft is in flight. Long range naval cannons have been computing the earth's rotation under the projectile in aiming calculations for more than a century. Satellites in synchronous orbit that appear stationary are actually traveling at the earth's rate of rotation.
A body at rest will remain at rest and one in motion will remain in motion, until and unless acted upon by an external force. Law of inertia. The rate of change of momentum of a body is proportional to the resultant force acting on the body in the same direction as its motion. These laws apply only at speeds not approaching the speed of light and do not apply to sub-atomic particles.
It'll produce voltage if you spin it forwards, too. The only difference between a DC motor and a DC generator is what you use it for. A long time ago, cars had DC generators on them instead of AC alternators. When you replaced a generator, you had to "polarize" it so it would make electricity. You hooked it up to your battery and let it run, as a motor, for a few seconds. Don't try that with an alternator because you'll break it. If you're looking for a neat little elementary-school science project, you can use little Radio Shack electric motors as generators for things like windmills, water wheels, dynamos turned by bicycle tires..
Density is a physical characteristic, and is a measure of mass per unit of volume of a material or substance. It is a measurement of the amount of matter in a given volume of something. The higher an object's density, the higher it's mass per unit of volume. The average density of an object equals its total mass divided by its total volume.
A denser object such as iron will have less volume than an equal mass of some less dense substance such as water. What Is An Alloy? An alloy is a homogeneous hybrid of two or more elements, at least one of which is a metal, and where the resulting material has metallic properties.
The resulting metallic substance often have unexpected characteristics.
Classification of Alloys: Alloys can be classified by the number of their constituents. An alloy with two components is called a binary alloy; one with three is a ternary alloy, and so forth. Alloys can be further classified as either substitution alloys or interstitial alloys, depending on their method of formation.
In substitution alloys, the atoms of the components are approximately the same size and the various atoms are simply substituted for one another in the crystal structure. An example of a binary substitution alloy is brass, made up of copper and zinc.
Interstitial alloys occur when the atoms of one component are substantially smaller than the other and the smaller atoms fit into the spaces interstices between the larger atoms. An alloy is a metal mixed with another metal to make it stronger.
What Is Pascal S Principle? Pascal's Principle states that the pressure is transmitted evenly through a liquid. That's why when you inflate a balloon with air it expands evenly in all directions. The arrangement of atoms in solids are different from those in liquids in that they are unable to move from their location in the solid, where they can move in the liquid.
A solid's atoms are vibrating very rapidly, but the molecules are all locked into place, whereas in a liquid the molecules are free to move around. Also in general the atoms of a solid are closer together than those of a liquid with the exception of water, whose solid form is less dense. Its velocity, average velocity and instantaneous velocity will all be the same at any or every time an investigator makes an observation.
Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions. Galvanometer - measures electric current, Fluxmeter - measures magnetic flux, Endoscope - used to examine internal parts of the body. Barograph - Recordings of atmospheric pressure, Bolometer - Used to measure heat radiation, Callipers - Used to measure inner and outer diameters of bodies.
Voltmeter - is used to measure electric potential difference between two points, Wavemeter - is used to measure the wavelength of a radiowave, Viscometer - is used measure viscosity of liquid.
Pykometer - used to determine the density and coefficient of expansion of liquids, Polygraph - used to record changes in heartbeat, blood-pressure and respiration, Photometer - used to compare luminous intensity of the source of light.
Spectroscope - used to record spectra, Spectrometer - used to measure the position of spectral lines, Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude. Thermostat - is used to regulate the temperature at a particular point. Tonometer - is used to measure the pitch of a sound, Transponder - is used to receive a signal and transmit a reply immediately. Physics Questions Answers 1.
Which instrument is used to measure altitudes in aircraft's? Multiple choice and true or false type questions are also provided. You can easily solve all kind of General Knowledge questions based on Physics by practicing the objective type exercises given below, also get shortcut methods to solve General Knowledge Physics problems. Large transformers, when used for some time, become very hot and are cooled by circulating oil.
The heating of the transformer is due to. Fermi - A unit of length equal to 10 meter one femtometer , used in nuclear physics. It is similar to the diameter of a proton. All Rights Reserved. Contact us: Current Affairs General Knowledge. Microbiology Biochemistry Biotechnology Biochemical Engineering. Why General Knowledge Physics?