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________________________✰Question ✰❍ An artificial satellite is moving in a circular orbit of RADIUS 4200 km. What is its speed if it takes 24 HOURS to revolve around the EARTH?_______________________________✰Given :-⋄ Radius of circular orbit (r) = 4200km⋄ Time taken (t) =24 hour_______________________________✰ To Find :-⋄Speed of satellite ._______________________________✰Solution :-➧ Distance(s) covered by satellite in 24 hour.➧ s=2πr where r is the radius of circular orbit. ➧ s= 2×3.14× 4200➧ s=26376km/hNow, we know that ⋄Speed= Distance travelled /time taken➧ Speed=26376/24➧ Speed= 1099km/h.∴The speed of satellite to revolve around the earth is 1099km/h.

here is your ANSWER FRIEND 30km/h

ussed in the previous part of Lesson 4, the shape of a velocity versus time graph reveals pertinent information about an object's acceleration. For example, if the acceleration is zero, then the velocity-time graph is a horizontal line (i.e., the slope is zero). If the acceleration is positive, then the line is an upward sloping line (i.e., the slope is positive). If the acceleration is negative, then the velocity-time graph is a downward sloping line (i.e., the slope is negative). If the acceleration is great, then the line slopes up STEEPLY (i.e., the slope is great). This PRINCIPLE can be extended to any motion conceivable. THUS the shape of the line on the graph (horizontal, sloped, steeply sloped, mildly sloped, etc.) is descriptive of the object's motion. In this part of the lesson, we will examine how the actual slope value of any straight line on a velocity-time graph is the acceleration of the object.mark as branliest answer

32Explanation:By USING SIMPLE KINEMATICS EQUATION

that the area under the VELOCITY-time GRAPH for a given time interval represents the DISTANCE covered by a UNIFORMLY accelerated object in a given time interval. From graph, ACCELERATION, a=slope of velocity time graph AB.mark as branliest answer

Answer:The weight of the BODY in air is 120 N.Explanation:buoyancy FORCE =Weight in air - weight in water20N=Weight in air - 100NWeight in air=120N.Explanation:MARK me as BRAINIEST

Speed is the distance traveled by an object where as, velocity is distance traveled by an object per unit time in a particular direction. Speed is a scalar quantity where as velocity is a vector quantity.54km/h = 54 x 1000m/3600s = 54 x 5/18 = 3 x 5 = 15m/sHOPE THIS HELPS YOU.........PLZ MARK AS BRAINLEST...........

Area under a v - t GRAPH REPRESENTS a PHYSICAL QUANTITY which is Distance.Area under the v - t graph will always GIVE distance.And distance has a unit of mplz mαrk αѕ вrαnlíѕt

The deceleration of a vehicle moving in STRAIGHT LINE that changes its velocity from 54 km/h to a dead STOP in 10 seconds isExplanation:my ANSWER 1.5m/s^2

very long solution you better give me brainliestExplanation:SEE the 3 rd ATTACHMENT short version for specific for liquid TAKE attachment 2 as proof

e velocity-time GRAPH of a uniformly ACCELERATED motion is a straight LINE graph inclining TOWARDS the time axis. If the object has positive constant acceleration, the graph slopes upward. In case the object has NEGATIVE constant acceleration, the velocity-time graph will slope downward.HOPE ITS HELP U✔✔

2.5Explanation:

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homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its COMPONENTS throughout any given sample. Conversely, a HETEROGENEOUS mixture has components in which proportions vary throughout the sample. "Homogeneous" and "heterogeneous" are not absolute terms, but are dependent on context and the size of the sample. In chemistry, if the volume of a homogeneous suspension is divided in half, the same amount of MATERIAL is suspended in both halves of the substance. An example of a homogeneous mixture is air.In physical chemistry and MATERIALS science this refers to substances and mixtures which are in a SINGLE phase. This is in contrast to a substance that is heterogeneous.[1]Explanation:hope it helps you thanku

The dispersion is caused due to the the difference in the ANGLE of deviation for different COLOURS. In the CASE of a glass slab, the opposite sides are parallel and therefore different COLORS emerge parallel to each other and are seen simultaneously. Therefore, dispersion doesn't occur in a glass slab.Explanation:please mark as branlist

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Technically, displacement is the shortest DISTANCE between any two points. ... Displacement is always LESS than or equal to distance. Note that distance is a scalar whereas displacement is a vector.So' displacement cannot be more than distance.Explanation:hope it HELPS you THANKU

In a circular MOTION when the body comes back to the ORIGINAL position then the displacement of the body is shortest distance between the FINAL and the initial position of object. So the displacement is ZERO.

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First and foremost is to make sure there are at least a HALF DOZEN or so other students INTERESTED in forming such a club to begin with, and then also finding a teacher, community leader or parent who is willing to SERVE as an ADULT sponsor.

Physical conditions LIKE TEMPERATURE and PRESSURE affect state of matter. ... When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (MELTING), liquid to gas (vaporization), or solid to gas (sublimation).Explanation:hope it's help U mark m as a Brianlist❤❤❤

▪ Two resistors of resistance 12Ω and 6Ω are CONNECTED in parallel.▪ PD across connection = 10VTo FIND :▪ Current FLOW in the circuit.Concept :✏ First we have to find out equivalent resistance of the parallel connection.✏ After that, we can easily CALCULATE current flow in the circuit with the help of ohm's law.Calculation :☢ Equivalent resistance :→ 1/Rp = 1/R1 + 1/R2→ 1/Rp = 1/12 + 1/6→ 1/Rp = (1+2)/12→ Rp = 12/3→ Rp = 4Ω☢ Current flow in the circuit :→ V = I × Rp→ 10 = I × 4→ I = 10/4→ I = 2.5A

ifferent colors of LIGHT travel at different speeds, the refractive INDEX is different for each color. As a result, when WHITE light passes through the refracting SURFACE of the prism, its components bend into different ANGLES, causing the single beam of light to separate.

Each BEAM of light, with its own particular wavelength (or COLOR), is SLOWED differently by the glass. Since violet light has a shorter wavelength, it is slowed more than the LONGER wavelengths of red light. CONSEQUENTLY, violet light is bent the most while red light is bent the least

ement is the shortest DISTANCE from the initial to the FINAL POINT. Since, DISPLACEMENT is the shortest distance required, it can be less than or equal to distance, but never greater than distance.

Let initial distance traveled by the car is s 1 , in time t 1 , and velocity is v 1 thens 1 = 21 αt 12 v 1 =αt 1 v 12 =2αs 1 let remaining distance traveled by the car is s 2 , in time t 2 , and velocity is v 2 thenNow, u 2 =v 1 So, s 2 =v 1 t 2 − 21 βt 22 v 2 =0=αt 1 −βt 2 ⇒ t 2 t 1 = αβ t 1 +t 2 =t⇒t 2 ( αβ +1)=t⇒t 2 = β+ααt So, t 1 =( β+αβt )Clearly MAXIMUM velocity attained is v 1 , sov 1 =αt 1 =( β+ααβt )Explanation:Hope it would help you and please MARK it as brainliest and please FOLLOW me.

The DISPLACEMENT of a moving object in a given interval is ZERO i.e., the object COMES back to its initial POSITION in the given time (displacement is the SHORTEST distance between the initial and final position of an object).

at the first TRIP he took 3 HRS to travel 90 km and at the second trip he took 2 hrs to travel 90 km then average speed is (speed of first trip + speed of second trip) /2therefore ANS is 37.5 kmph

to tell the TIRED man on his return home that his average speed was ZERO !] Answer:-Time taken by the man to reach the MARKET from home,t1 = 2.5/5 = 1/2 H = 30 minTime taken by the man to reach home from the market, t2 = 2.5/7.5 = 1/3 h = 20 minTotal time taken in the whole journey = 30 + 20 = 50 min(i) 0 to 30 minAverage velocity = Displacement/Time = 2.5/(1/2) = 5 km/hAverage speed = Distance/Time = 2.5/(1/2) = 5 km/h(ii) 0 to 50 minTime = 50 min = 50/60 = 5/6 hNet displacement = 0Total distance = 2.5 + 2.5 = 5 kmAverage velocity = Displacement / Time = 0Average speed = Distance / Time = 5/(5/6) = 6 km/h(iii) 0 to 40 minSpeed of the man = 7.5 km/hDistance travelled in first 30 min = 2.5 kmDistance travelled by the man (from market to home) in the next 10 min= 7.5 × 10/60 = 1.25 kmNet displacement = 2.5 – 1.25 = 1.25 kmTotal distance travelled = 2.5 + 1.25 = 3.75 kmAverage velocity = Displacement / Time = 1.25 / (40/60) = 1.875 km/hAverage speed = Distance / Time = 3.75 / (40/60) = 5.625 km/h

30secExplanation:TIME =DISTANCE /speed=0.5km/60kmph=1/120 hr=0.5 min=30sechope this HELPS you...

Length of a WIRE is DIRECTLY proportional to resistance and current. So when length of the wire gets doubled/half the resistance and current also GET doubled/half. so here resistance becames 5 ohm and current becames 1 AMPERE