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Positive ACCELERATION= A bus or CAR moving with increasing speed has positive acceleration. We can say that it is ACCELERATING with the direction of travel. Negative acceleration=In the above example, if we APPLY the break, the speed of the car DECREASES. Then it has negative acceleration.

The answer to the question is 90 cm i.e the object DISTANCE is 90 cm from the mirror.CALCULATION:As per the question, the focal length of the convex mirror f = 30 cm.The magnification of the image m = \FRAC{1}{4} 41 We are asked to calculate the object distance [u].As per the sign convention for reflection, the measurements taken along the direction of light is taken as positive and its reverse is taken as negative.The transverse measurement above the principal AXIS is taken as positive and below the principal axis is taken as negative.Hence, the focal length of the convex mirror f = +30 cm.The image formed by a convex mirror is virtual and erect.Hence, the magnification will be positive.Hence, magnification m = +\frac{1}{4}+ 41 = +0.25The relation between focal length, magnification and object distance is given as - m=\ \frac{f}{f-u}m= f−uf u=\frac{m-1}{m}\times FU= mm−1 ×f =\frac{0.25-1}{0.25}\times -(30)= 0.250.25−1 ×−(30) =\ -90\ cm= −90 cm [ANS] Here, the negative sign is due to the fact that object distance is measured opposite to the direction of light.

hello PLZ FOLLOW me plz mark as BRAINLIST Explanation:Other examples of items with gravitational potential energy include:A raised weight.Water that is behind a dam.A car that is parked at the top of a hill.A snow PACK (potential avalanche)A yoyo before it is released.River water at the top of a waterfall.A book on a table before it falls.A child at the top of a slide.

tion:If the earth abruptly changed its ROTATIONAL direction, PROBABLY MANY things we SEE every day WOULD be destroyed. Skipping over the transition, however, an earth rotating in the opposite direction would, among other things, cause the sun, moon and stars to appear to rise in the west and set in the east.

2.5m/sExplanation:50 gram=0.05 kglaw. of CONSERVATION of momentumm1u1=m2u2m = massm1=0.05kgm2=10 kgu1=500m/su2=recoil velocity0.05 x 500 =10 x u2u2=25/10u2=2.5m/stherefore recoil velocity of the gun is 2.5m/s

In physics, a standing wave, ALSO known as astationary wave, is AWAVE which oscillates in time but whose peak amplitude profile does not move in space. The peak amplitude of the waveoscillations at any point in space is constant with time, and the OSCILLATIONS at different POINTS throughout the wave are in phase.

Properties of GOOD units are: • They are reproducible. • They should not change with time, TEMPERATURE, PLACE or any PHYSICAL condition. • They should be of PROPER size. •

A derivative is a rate of change, which, geometrically, is the slope of a GRAPH. In PHYSICS, velocity is the rate of change of position, so mathematically velocity is the derivative of position. Acceleration is the rate of change of velocity, so acceleration is the derivative of velocity.!! MARK me brainliest PLEASE please !!

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Examples of NUISANCE of thermalexpansion : 1 ) Due to high temperature in hot summer , the railway rails may EXPAND and CHANGE thier shape to irregular shape . Thismay cause derailment of trains which travel on the track . ... 2 ) Due to high temperature in hot summer , cement FLOORS or walls may give cracks .

Explanation:The train traveling 110m long is traveling at 60 km/hr The time it will cross a cyclist MOVING at 6km/hr CHANGE 110 m to .110 km a) in the same direction t = {.110/(60-6)}×3600; changed hrs to SECONDS t = 7.33 seconds b) in the opposite direction t = {.110/(60+6)}×3600 t = 6 seconds So option B is the correct answerpls mark as BRAINLIEST if u found it useful

the ANGLE which an incident LINE or RAY makes with a perpendicular to the surface at the POINT of incidence.pls MARK as brainliestExplanation:

1.Solar energy is any type of energy generated by the sun. Solar energy can be harnessed directly or indirectly for human use. These solar panels, mounted on a rooftop in Germany, harvest solar energy and convert it to electricity. ... Solar energy is created by nuclear fusion that TAKES place in the sun.2.Solar cooking is free. ... Solar cooking is quick and easy. ... Food cooked with a solar cooker is healthy. ... Solar cooked food tastes amazing! ... Solar cookers make no noise. ... Cooking with sunshine is kind to the environment. ... Solar cooking ovens are portable. ...4.The ocean can produce two types of energy: thermal energy from the sun's heat, and mechanical energy from the tides and waves. Oceans cover more than 70% of Earth's surface, making them the world's largest solar collectors.8.'A uranium-235 atom absorbs a neutron to become uranium-236 which then undergoes fission to form the products xenon-140 and strontium-93 with three neutrons. '5.The definition of tide is the cycle of rising and falling of the surface of bodies of water caused by the attraction of the moon and the sun. An example of the tide is when the ocean's water is at its highest point on the beach.6.Ocean Thermal Energy Conversion (OTEC) is a process that can produce electricity by using the temperature difference between deep cold ocean water and warm tropical surface waters. OTEC plants pump LARGE quantities of deep cold seawater and surface seawater to run a power cycle and produce electricity.9.nuclear fusion The energy source for all stars is nuclear fusion. Stars are made MOSTLY of hydrogen and helium, which are packed so densely in a STAR that in the star's center the pressure is great ENOUGH to initiate nuclear fusion reactions. In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom.10.The energy released by fission is a million times greater than that released in chemical reactions; but lower than the energy released by nuclear fusion. The energy released by fusion is three to four times greater than the energy released by fission.THEREFORE IN NUCLEAR FUSION THE ENERGY RELEASD IS MORE

B) Roughness of surface. ADDTIONAL INFORMATION -------☆------☆------☆------☆------• What is friction ? -> The FORCE which opposes the state of motion is called frition. • Friction is contact force. • It depends on the irregularities of the substance.• TYPES of friction STATIC friction - friction acts in an object which just strat. SLIDING friction - friction acts in an object which slids on the surface Rolling friction - when friction acts on an object which is rolling .# Be brainly

at a dielectric INTERFACE from n1 to n2, there is a PARTICULAR angle of incidence at which Rp goes to zero and a p-polarised incident wave is purely refracted. This angle is known as Brewster's angle, and is around 56° for n1 = 1 and n2 = 1.5 (TYPICAL glass).EXPLANATION:mark me on brainlist

the VALUE of RESISTANCE is 10 OHMS

by USING P=VI POTENTIAL DIFFERENCE = 2 VOLT

Because CENTRIPETAL is not a FUNDAMENTAL force.Explanation:HOPE it's helpful to you ❤️❤️❤️❤️❤️Plzzzzz MARK me the Brainliest

✯Required QUESTION:From a rifle of mass 4 kg, a BULLET of mass 50 g is FIRED with an initial velocity of 35 m/s. Calculate the initial recoil velocity of the rifle.✯To Find:what is the recoil velocity of the gun?✯Solution:Mass of the rifle (m1) = 4 kgMass of the bullet (m2) = 50 g = 0.05 kgRecoil velocity of the rifle = v1A bullet is fired with an initial velocity (v2) = 35 m/sInitially, the rifle is at rest.Thus, its initial velocity (v) = 0Total initial momentum of the rifle and bullet system⇒ (m1+m2) × v = 0The total momentum of the rifle and bullet system after firing= m1v1 + m2v2= (4 × v1 ) + (0.05 × 35)= 4v1 + 1.75According to the LAW of conservation of momentumTotal momentum after the firing = Total momentum before the firing4v1 + 1.75 = 0v1= -1.75 / 4v1 = – 0.4375 m/sThe negative sign indicates that the rifle recoils backwards with a velocity of 0.4375 m/s.

d. LAW of inertiahope it HELPS.................

Chemical compound, any substance composed of identical MOLECULES CONSISTING of atoms of two or more chemical ELEMENTS. methane moleculeMethane, in which FOUR hydrogen atoms are bound to a single carbon atom, is an example of a BASIC chemical compound.

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(Alternately, you could prove the new STATEMENT by contradiction. Pick any BLACK point. All points in distance 1 from that point have to be black. This is the circle with radius 1. All points in distance 1 from those points have to be black as well. Here we can observe that the set of all points known to be black at this moment is the entire disc of radius 2 centered where we started. Continuing this ARGUMENT, we can now grow the black disc indefinitely and thus prove that the entire plane has to be black, which is the contradiction we seek. Of COURSE, this is basically the same proof as above, just seen from a different point of view.)

Food security, as defined by the United Nations' Committee on World Food Security, means that all PEOPLE, at all times, have physical, social, and economic access to SUFFICIENT, safe, and NUTRITIOUS food that meets their food preferences and dietary NEEDS for an active and healthy life

mple… observe the question, the question states “rate of velocity=2 m/s” i.e. accelaration in tangential direction which is now =2 m/s^2.Now since a body in circular path has two COMPONENTS of accelaration i.e. RADIAL (towards centre) and tangential. We already have the tangential.For the radial accelaration:A(r) = V^2÷R = 30^2÷500 = 900÷500 = 1.8 rad/sec^2.Since these two VECTORS have an angle of 90° b/w them, the NET Vectorial accelaration becomes:(A(t)^2 +A(r)^2)^1÷2 (because cos 90°=0)=√7.24 ≈ 2.7 m/s^2

2: Lights makes an angle of 0 degree with the normal while travelling from rear to denser medium will not change its direction because normally when light MOVES from rear to denser medium it bends toward the normal but here the angle of light with the normal is 0 degree so there is no chance to bend the light TOWARDS the normal so A is the correct answer HOPE DUE TO THIS ANSWER YOU WOULD UNDERSTAND THE CONCEPT AND YES IF YOU DIDN'T UNDERSTAND THEN MAKE A COMMENT I WILL EXPLAIN YOU AGAIN PLEASE BRO MAKE THIS ANSWER OF THE BRAINIALIST

Electrolysis refers to the DECOMPOSITION of a substance by an ELECTRIC current. Example: When the current is PASSED through the MOLTEN SODIUM chloride, sodium and chlorine are deposited at different electrodes. Thus, sodium chloride is decomposed into sodium and chlorine.

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A potentiometer is a three-terminal resistor with a sliding or rotating CONTACT that forms an adjustable voltage divider. If only TWO terminals are used, ONE END and the wiper, it acts as a variable resistor or rheostat.

heya❤️mate......These are the two diagrams :-Glass-slab DIAGRAM.Prism diagram.( Refer to the attachments ✔️✨)REST all are ray diagrams of light passing through concave and CONVEX lens.I HOPE it will help you.....!! ☺️✨

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The POTENTIAL ENERGY of your body is least when you are LYING down on the ground. An object can store energy as a result of its position.hope it HELPS u mate have a great day......

Distance TRAVELLED in FIRST half = v1×t1Distance travelled in SECOND half = v2×t2Average VELOCITY = total distance travelled ÷ total time v1t1+v2t2/t1+t2

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