The value of acceleration due to gravity at Earth's surface is 9.8 ms2. The altitude above its surface at which the acceleration due to gravity decreases to 4.9 ms2, is close to: (Radius of earth = 6.4 106 m) %3D 1. 2.6 x 106 m 2. 6.4 x 106 m 3. 9.0 x 106 m 4. 1.6 x 106 m

Q: 8. A 78-kg parachutist, in the first few seconds of her jump, accelerates at a rate of 7.4m/s[V]. Ca...

A: Given Mass of parachutist = m = 78 kg acceleration in downward direction = a = 7.4 m/s2 WWe have to ...

Q: Rq = 5.50 R, = 4L Ry = 7:50

A:

Q: bus travels along Cular curve section of raolus rA wuh a speed of Vs and lotal acceleration of "a /s...

A: Given: v=41 ft/sr=397 fta=10.35 ft/s2

Q: An elevator suspended by a vertical cable is moving downward but slowing down. The tension in the ca...

A: Option (a) - greater than the weight of the elevator. Reason - 1)Here given that  the elevator is sl...

Q: In most households, fluorescent lamps are used. The circuit involves the presence of a capacitor. Wh...

A: Fluorescent lamps form an inductive load on the AC mains supply. As a result large installations of ...

Q: With a single impulsive maneuver, an earth satellite changes from a 400-km circular orbit inclined a...

A:

Q: 1. A capacitor is composed of 2 plates separated by a sheet of insulating material 2mm thick and of ...

A:

Q: When a glass rod is rubbed with a silk cloth, the rod acquires a charge of magnitude 4.25nC.  (a) D...

A: Given that:- Magnitude of charge acquire by rod=4.25nC

Q: Calculate the pressure a force of 110 N is applied to an object of area 4m?.

A: Given data :                      Force  =  F                     Area    =   A                   To...

Q: The current density of a silver wire is 3.20x106 A/m2 . If the current and the drift velocity of the...

A: Given that                      The current density of the silver wire (J) = 3.20×106A/m2           ...

Q: Astronomers are always seeking to build bigger, more powerful telescopes, which will allow them to s...

A: Astronomers are always seeking to build bigger, more powerful telescopes, which will allow them to s...

Q: 4.6 kg toy race car can move along an x axis. The figure below gives Fx of the force acting on the c...

A: Given, Mass of toy car ,m = 4.6 kg The graph of Fx vs t. We know that area under acceleration vs tim...

Q: A stone is thrown horizontally from the top of an incline that makes an angle e with the horizontal....

A:

Q: A block of mass m, = 1.55 kg and a block of mass m, = 6.25 kg are connected by a massless string ove...

A:

Q: Light passes from air into ice with part of the ray reflected and part refracted. The reflected and ...

A:

Q: A point charge Q = 0.5 nC is at the origin. Determine the potential at r = 5m if the potential at r ...

A:

Q: 1. Find the total capacitance. CIEF All capacitors = 2uF

A: Given that:- Capacitance of each capacitor=2uF

Q: 8. A camera flash unit stores energy in a 150-µF capacitor at 200 V. How much electric energy can be...

A:

Q: 1. A ball is thrown from a height of 2 meters at an angle of 30° with an initial velocity of 30m/s t...

A:

Q: b) In water the speed of sound is different. The speed of a sound wave in water is 1300 m/s. The sou...

A:

Q: (a)What is the capacitance of a parallel plate capacitor having plates of area 1.50 m^2 that are sep...

A: Given : Plate area A=1.50 m2, Plate separation d=0.02 mm, Battery voltage V=9 V. Required: (a) Capac...

Q: Type of Friction where it opposes the motion of an object and completely negate the motion of that o...

A: Kinetic friction is a type of sliding friction in which two objects are come in a motion relative to...

Q: At a given instant, a car travels along a circular curved road with a speed of 20 m/s while decreasi...

A: Speed of car=20m/s Tangential acceleration=3m/s² Total Acceleration=5m/s²

Q: volcano erupted and spit a rock in the atmosphere at an angle of 35 degrees with the horizontal with...

A: Initial velocity = V0= 25 m/s angle = 35 degrees h = -20 m

Q: when the pendulum is at it's lowest point, what type of energy does it have and WHY?

A: Pendulum have kinetic energy at it's lowest point . Reason -  1) At the lowest point in its swing, t...

Q: An electron is placed in a uniform electric field of 43 nN/C directed north created by two horizonta...

A:

Q: a. What is the acceleration for the first 10 seconds?  b. What is the acceleration for the from 10 s...

A:

Q: A metal can containing condensed mushroom soup has mass 230 g, height 11.0 cm and diameter 6.38 cm. ...

A:

Q: A satellite is in a circular earth orbit of altitude 400 km. Determine the new perigee and altitudes...

A:

Q: A centrifuge in a biology laboratory rotates at an angular speed of 3,500 rev/min. When switched off...

A:

Q: On an amusement park ride, passengers are seated in a horizontal circle of radius 7.5 m. The seats b...

A: Given data:  Radius (r) = 7.5 m Initial angular velocity (ωi) = 0 rad/s Final angular velocity (ωf) ...

Q: Given a series circuit with total voltage of 15, R = 7 2, R2 = 4 Q, and R3 = 2 Q. Find the V2.

A:

Q: An object with a mass of 4 kg is initially at rest on a horizontal floor. It is then pushed in a str...

A: Given: The mass of the object is 4 kg. The initial speed of the object is 0 m/s. The applied force o...

Q: A series circuit connected to a 50 V battery has R1 = 30 Q and R2 = 25Q, calculate for: a) Total res...

A:

Q: 6. A 3.0 kg mass is attached to a 5.0 kg mass by a strong string that passes over a frictionless pul...

A:

Q: A small charge 53nC is found in a uniform electric field 54kN/C. Determine the force on the charge.

A: We know thatF=Q×EHereF=Electrostatic forceQ=ChargeE=Electric field

Q: A solid sphere of radius 40.0 cm has a total positive charge of 34.5 µC uniformly distributed throug...

A:

Q: What should be the diameter of a pinhole in order to produce the nearest and brightest image if the ...

A: For the maximum intensity at a distance d the radius of pinhole is given by  where λ is the wavelen...

Q: A potential difference of 100 V is applied by a battery across a pair of metal plates 5cm apart. a) ...

A:

Q: Given the circuit in Fig 2; R1, R2 and R3 are resistances of 3, 4 and 5 ohms respectively. Calculate...

A:

Q: A parallel plate air capacitor has a capacitance of 5.0 F. 13. What is the capacitance if a dielect...

A: Given, Capacitance of the capacitance of the air filled parallel plate capacitor, C = 5.0 F dielectr...

Q: A wheel rotates through 6.0 rad in 2.0 s as it is uniformly brought to rest. The initial angular vel...

A: Given Angle traveled = θ = 6.0 rad Time taken = 2.0 s Final angular velocity = ω = 0 We have to cal...

Q: Given a parallel circuit with three resistors and a total voltage of 15, R1 = 10 2, R2 = 20 2, and R...

A: Given data:  Three resistors are connected in parallel R1 = 10 Ω, R2 = 20 Ω and R3 = 30 Ω Total volt...

Q: Light traveling in first medium with a speed of 1.5x108 m/s, strikes the surface of a transparent ma...

A:

Q: Given a parallel circuit with three resistors and a total voltage of 15, R1 = 10 Q, R2 = 20 2, and R...

A: Answer:-  Given  Resistance (R1) = 10 ohm  Resistance (R2) = 20 ohm  Resistance (R3) = 30 ohm  Volta...

Q: Three point charges are located along the x-axis. Point charge a = 4.8 μC is at x= 0. Point charge b...

A: point charge a = 4.8 μC at x = 0point charge b = 5.7 μC at x = 2 mpoint charge c = 9.3 μC at x = 3 m...

Q: What is the angle of deviation if a ray of light in water is incident at an angle of 10 degrees and ...

A:

Q: In the figure below, determine the point (other than infinity) at which the electric field is zero. ...

A: Electric field : The electric field due to a given electric charge Q is defined as the space around ...

Q: Hi there, I really need some help! I cannot figure out what I am doing wrong. A toy top with a spoo...

A:

Q: One end of a brass wire 120 cm long and a diameter of 0.24 cm is fastened to a point in the ceiling....

A: Length of wire l=120 cm, diameter of the wire d=0.24 cm (radius r=d/2=0.12 cm), weight of the body h...

Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.