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(a) As the object is moved towards the lens, the image distance increases. Thus, the student moves the lens away from the screen to focus the image.

(b) Size of the image increases when the object is moved towards the lens.

(c) When the object is moved very close to the lens, no image is formed on the screen. A virtual image is formed behind the object on the same side of the screen.

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The minute hand of a clock covers 360 deg in 60 min or 6 deg/min.

The hour hand of a clock covers 30 deg in 60 min or 0.5 deg/min.The ratio of the angular speed of the minute to the hour hand = 6/0.5 = 12:1.

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net resistance = 4 + [(3)(6)/6+3] = 4 + (18/9) = 4 + 2 = 6ohmnow, current in the circuit = V/R = 3/6 = 0.5A

now, voltage across 4ohm = Inet*(4) = 0.5(4) = 2V

since, 3 and 6 ohm are connected parallelThey will have same voltagethat is, total voltage - voltage across 4ohm = 3-2 = 1V

Thus, voltage across 6ohm = 1V

As its a square wave and plus in square wave system we know that120° phase shift is thereso100/√3 A

Root pressureis the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.

Root pressure occurs in thexylemof somevascular plantswhen the soil moisture level is high either at night or whentranspirationis low during the day. When transpiration is high, xylem sap is usually under tension, rather than under pressure, due totranspirational pull. At night in some plants, root pressure causesguttationor exudation of drops of xylem sap from the tips or edges of leaves. Root pressure is studied by removing the shoot of a plant near the soil level. Xylem sap will exude from the cutstemfor hours or days due to root pressure. If a pressure gauge is attached to the cut stem, the root pressure can be measured.

Root pressure is caused by active distribution of mineral nutrient ions into therootxylem. Without transpiration to carry the ions up the stem, they accumulate in the root xylem and lower thewater potential. Water then diffuses from the soil into the root xylem due toosmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells. Root pressure provides a force, which pushes water up the stem, but it is not enough to account for the movement of water to leaves at the top of the tallesttrees. The maximum root pressure measured in some plants can raise water only to 6.87 meters, and the tallest trees are over 100 meters tall.

Coplanarforce systems have all the forces acting in in one plane. They may be concurrent, parallel, non-concurrent or non-parallel. All of these systems can be resolved by using graphic statics or algebra.concurrentcoplanar force system is a system of two or more forces whose lines of action ALL intersect at a common point.

parallelcoplanar force system consists of two or more forces whose lines of action are ALL parallel.

non-concurrent and non-parallelsystem. This consists of a number of vectors that do not meet at a single point and none of them are parallel. These systems are essentially a jumble of forces and take considerable care to resolve.

Abalanced equationis anequationfor achemical reactionin which the number of atoms for each element in thereactionand the total charge are the same for both the reactants and the products. In other words, the mass and the charge arebalancedon both sides of thereaction.

The unit of electricalchargequantity in the International System of Units is thecoulomb. Onecoulomb(1 C) is equal to approximately 6.24 x 1018elementarycharges. Thus, an elementarychargeis approximately 1.60 x 10-19C.

Coulomb's law states that: The magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. The force is along the straight line joining them.

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Adioptre ordiopter is a unit of measurement of the opticalpower of a lensor curved mirror, which is equal to the reciprocal of the focal length measured in metres. (1 dioptre=1m−1.) It is thus a unit of reciprocal length.

1 dioptre is a unit of measurement of power of lens and equal to 1/f = 1/focal length.

Coulomb's law statesthat: The magnitude of the electrostaticforceof attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. Theforceis along the straight line joining them.

Suppose an object of mass, m is moving along a straight line with an initial velocity, u.It is uniformly accelerated to velocity, v in time, t by the application of a constant force, Fthroughout the time, t. The initial and final momentum of the object will be,p1 = mu and p2 = mv respectively. The change in momentum ∝ p2 – p1The change in momentum∝ mv – muThe change in momentum∝ m × (v – u).The rate of change of momentum ∝ m × (v −u)/tOr, the applied force,F ∝m × (v −u)/tF = km (v - u)/t

F = kma Here a [a = (v – u)/t ] is the acceleration, which is the rate of change of velocity. The quantity, k is a constant of proportionality.The SI units of mass and acceleration are kg and m s-2 respectively. The unit of force is so chosen that the value of the constant, k becomes one. For this, one unit of force isdefined as the amount that produces an acceleration of 1 m s-2 in an object of 1 kg mass.That is, 1 unit of force = k × (1 kg) × (1 m s-2).Thus, the value of k becomes 1. and F = ma which is the mathematical expression on the Newton's second law of motion.

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The density of material A= 1500 kg/m^3

Density of material B = 2000 kg/m^3.

According to the findings,

Heat capacity of 8 volumes of A = heat capacity of 12 volumes of B

Ratio of specific heat= SA/ SB=?

The ratio of specific heat can be calculated by following formula:

Sa/ma x mb/Sb

=2:1

option A

(I) total resistance(resistances are in series)Req=5+8+12=25ohms

Let T be tension in the string

Mg−T=Mg4Mg−T=Mg4

T=Mg−Mg4T=Mg−Mg4

=3Mg4=3Mg4

Work done by tension

=−T×d=−T×d

=−3Mg4=−3Mg4×d×d

=−3Mgd4=−3Mgd4

Hence a is the correct answer

option (a) is the right answer

d ) is the correct answer

d is the right answer

( d ) is the correct answer

d = ( is the right answer )

connecting a conductor to earth is called grounding. this is done to give a passage way for high electric current to neutralize. the slowest the risk of shock. every appliance has three pin port and which one port is designated as the grounding port. is the lower end of the lightning conductor is not in contact with the Earth then the charges will not flow and the chances of shock increases.

It is necessary because the current due to thunderstorm will go to earth and will not effect building the current will be neutral after going to earth surface.

i) a→tan∅ = 4/3 , b→tan∅ = 3/4 , c→tan∅ = 1 so, 3/4 > 1 > 4/3 b < c < a

option 3

option c is correct.

For two vectors to be perpendicular, their dot product must be equal to 0 .

Let the vector perpendicular to given vector is

ai+bj to satisy the above condition-

(4i−3j).(ai+bj)=0(4i−3j).(ai+bj)=0

(4a−3b)=0(4a−3b)=0

hence4a=3b4a=3b

i.e,a/b=3/4

therefore we get 3i-4j

6Zn + 3O2 -> 6ZnO2Cu + O2 -> 2CuO

as hazard communication program is for hazard managementhence option 2option 3 option 4option 5

Commonwealth Coordinated Care Plus (CCC+) is a statewide Virginia Medicaid managed care program that coordinates care for full Medicaid beneficiaries. It is a Medicaid managed care program through the Department of Medical Assistance Services ( DMAS).

Parallel connectionshave multiple wires runningparallelto each other (hence the name), and can transmit data on all the wires simultaneously.Serial, on the other hand, uses a single wire to transfer the data bits one at a time

Ans :- Voltage is the same across each component of theparallel circuit. The sum of the currents through each path is equal to the total current that flows from the source. You can find total resistance in aParallel circuitwith the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +...

The parallel arrangement used in domestic wiring because of the following (i)All the appliances works at the same voltage as that of the electric supply. (ii) If one of the appliances is out of order, e.g. if a bulb gets fused, all other appliances keep on working as the circuit is not broken in a parallel arrangement of devices.

D) is the correct answer

Work done is = Volume of water pumped at a constant pressure * constant excesspressure over atmospheric pressure

P = excess pressure = 2* 10⁵ N/m² -+1* 10⁵ N/m² = 3* 10⁵ N/m²Volume of water pumped = V2 - V1 = V = 4 m³

W = P *V= 3* 10⁵ N/m² *4 m³= 12*10^5Joules

First understand the problem,

at 27c the velocity of sound is 340m/s

calculate the velocity of sound at 126c

So,by the given condition,

Let the velocity be x.

27/340 = 127/x.

127*340 = x*27

43180 = x*27

43180/27 = x

x = 1599.2

1 amp=6.24×10^18 charge carriers

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