Velocity of escape is equal to

A. r × √(2g); where r: radius of Earth or any other planet for that matter, g:

gravitational field strength

B. g × √(2r); where r: radius of Earth or any other planet for that matter, g:

gravitational field strength

C. √(2g) ⁄ r; where r: radius of Earth or any other planet for that matter, g:

gravitational field strength

D. √(2gr); where r: radius of Earth or any other planet for that matter, g:

gravitational field strength


1 Answer

Answer :

√(2gr); where r: radius of Earth or any other planet for that matter, g:

gravitational field strength


Related questions

Description : Torricelli's theorem states that the velocity ‘v’ of the liquid emerging from the bottom of the wide tank is given by √(2gh). In practice, this velocity is: A. equal to √(2gh) B. greater than √(2gh) C. lesser than √(2gh) D. independent of height and gravitational field strength

Last Answer :  lesser than √(2gh

Description : Period of simple harmonic motion of a spiral spring or elastic thread is given by A. T = 2π (extension produced/gravitational field strength) B. T = 2π (extension produced/√( ... (extension produced)/gravitational field strength) D. T = 2π √(extension produced/gravitational field strength)

Last Answer : T = 2π × √(extension produced/gravitational field strength)

Description : Critical speed of rotation, N (in rps - rotation per second) of a trammel is equal to (where, g = acceleration due to gravity = 9.81 m/sec 2 and, r = radius of trammel, metre.) (A) (1/2π). √(g/r) (B) (1/π). √(g/r) (C) ½ √(g/r) (D) 2π. √(g/r)

Last Answer : (A) (1/2π). √(g/r)

Description : Mass of Earth when it's radius is 6400 km and gravitational field strength is 9.81 N kg-1 is A. 6.0 × 1024 kg B. 5 × 1023 kg C. 40 × 109 kg D. 9 × 1024 kg

Last Answer : 5 × 1023 kg

Description : Weight of a person at a height of 2R from the centre of the earth, where R is the radius of the earth- (1) remains same (2) becomes half (3) becomes twice (4) becomes one-fourth

Last Answer : (4) becomes one-fourth Explanation: The gravitational force is proportional to 1/R2, where R is the distance from the centre of the Earth. So at a height of 2R from the centre of the earth, the corresponding weight would be one-fourth of the original weight.

Description : A person of mass ‘m’ kg jumps from a height of ‘h’ meters, he will land on the ground with a velocity equal to: A. √(2 × g × h) B. 1/h × √(2 × g) C. 2gh D. 2√(g × h)

Last Answer : √(2 × g × h)

Description : . In case of turbulent flow of fluid through a circular pipe, the (A) Mean flow velocity is about 0.5 times the maximum velocity (B) Velocity profile becomes flatter and flatter with ... , shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more

Last Answer : (D) Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity profile at the wall are more

Description : A proton moves in a uniform magnetic field in a circular path of radius R. If the energy of proton is doubled then the new radius becomes a) R √2 b) 2R c) R 2 d) √2 R

Last Answer : d) √2 R

Description : A body can escape the gravitational pull of the earth if it is thrown up with a velocity of? A. 25 miles per sec b ) 60 miles per sec C. 7 miles per sec (Answer) D. 10 miles per sec E. None of these

Last Answer : C. 7 miles per sec (Answer)

Description : According to the equation ‘r = (mv)⁄(Be)’, the faster moving particles A. move in smaller circle B. move straight C. move in bigger circle D. move randomly

Last Answer : move in bigger circle

Description : If r is the radius of a circle and d is its diameter is an equivalent formula for the circumference C 2r?

Last Answer : Circumference of a circle: 2*pi*radius or diameter*pi

Description : If r is the radius of a circle and d is its diameter is an equivalent formula for the circumference C 2r?

Last Answer : Circumference of a circle: 2*pi*radius or diameter*pi

Description : The radius of Gyration (k) for Rim Type Flywheel having radius ‘r’ is given by 1. k = 2r 2. k = r/2 3. k = r 4. k = r/3

Last Answer : 3. k = r

Description : The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be  (A) r/2  (B) 2r/3  (C) r/A (D) 3r/2 

Last Answer : (D) 3r/2 

Description : If L is the length of a moving vehicle and R is the radius of curve, the extra mechanical width b to be provided on horizontal curves, (A) L/R (B) L/2R (C) L²/2R (D) L/3R

Last Answer : Answer: Option C

Description : Below are the few steps given for scan-converting a circle using Bresenham's Algorithm. Which of the given steps is not correct? (1) Compute d = 3 – 2r (where r is radius) (2) Stop if x> y (3) If d

Last Answer : If d≥0,then d=4 *(x-y)+10, x=x+1 and y=y+1

Description : Adiabatic bulk modulus is equal to:  A. Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure B. Pressure C. The ratio of the specific heat capacities of the gas D. Υ ⁄ P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure

Last Answer : Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressur

Description : Isothermal bulk modulus is equal to A. Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure B. Pressure C. The ratio of the specific heat capacities of the gas D. Υ ⁄ P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure

Last Answer : Pressure

Description : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6.6xx10^(-11)Nm^(2)kg^(-2)),(,"Radius of

Last Answer : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6. ... to gravity",(g),=9.8ms^(-2)):}`

Description : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6.6xx10^(-11)Nm^(2)kg^(-2)),(,"Radius of

Last Answer : Calculate the mass and mean density of the earth from the following data : `{:(,"Gravitational constant",(G),=6. ... to gravity",(g),=9.8ms^(-2)):}`

Description : The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta) (A) 2gH (B) H × g) (C) 2g × H (D) 2gh)

Last Answer : Answer: Option D

Description : An electron and a neutron enter a magnetic field with the same velocity. Ratio of electron to neutron’s acceleration is a) mn me b) √ mn me c) √ me mn d) me

Last Answer : a) mn me

Description : As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease

Last Answer : decreases

Description : Origin of gravitational field is A. charges B. masses C. Earth's core D. matter

Last Answer : masses

Description : If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be - (1) R/4 (2) R/2 (3) R (4) 2R

Last Answer : (1) R/4

Description : Escape velocity of planet Mercury?

Last Answer : 4.2km/s

Description : Escape velocity of planet Jupiter?

Last Answer : 60km/s

Description : In a binary Hamming code the number of check digits is r then number of message digits is equal to: (A) 2r-1 (B) 2r-r-1 (C) 2r-r+1 (D) 2r+r-1

Last Answer : (B) 2r-r-1

Description : A proton having mass m and charge q is projected into a region having a perpendicular magnetic field. The angle of deviation of proton when it comes out of the region with mv √2 qB ⁄ is a) π/3 b) π/4 c) π/6 d) 2 π/3

Last Answer : b) π/4

Description : Satellite around Earth follows a circular path because A. gravitational force is parallel to velocity B. gravitational force is anti parallel to velocity C. gravitational force is perpendicular to velocity D. gravitational force is anti perpendicular to

Last Answer : gravitational force is perpendicular to velocity

Description : The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:

Last Answer : 8 T

Description : Boyle's law states that A. pressure of a gas is inversely proportional to its volume i.e. P V = constant B. pressure of a gas is directly proportional to its volume i.e. P⁄V = constant C. ... of a gas is directly proportional to the square of its volume i.e. P ⁄ V² = constant

Last Answer : pressure of a gas is inversely proportional to its volume i.e. P × V = constant

Description : When a gas or a liquid is subjected to an increased pressure, the substance contracts, the bulk strain is defined as A. final volume ⁄ original volume B. final pressure ⁄ original pressure C. change in volume ⁄ original volume D. original volume ⁄ change in volume

Last Answer : change in volume ⁄ original volume

Description : Einstein's mass-energy relationship states that if the mass decreases by Δm, the energy released ΔE is given by A. ΔE = Δm c, where "c" denotes the speed of light. B. ΔE = Δm c², where "c" ... where "c" denotes the speed of light. D. ΔE = Δm ⁄ c², where "c" denotes the speed of light

Last Answer : ΔE = Δm × c², where "c" denotes the speed of light.

Description : What is the value of gravitational acceleration ( g) in the center of the earth ?

Last Answer : The value of gravitational acceleration ( g) in the center of the earth is zero (0).

Description : If the radius of a sphere is 2r, then its volume will be -Maths 9th

Last Answer : As, r=2r Volume of sphere = 4​/3π(2r)^3 =32/3​πr^3

Description : If the radius of a sphere is 2r, then its volume will be -Maths 9th

Last Answer : (d) Given, radius of a sphere = 2r Volume of a sphere =4/3 π(Radius)3 = 4/3 π(2r)3 = 4/3 π 8r3 = (32 πr3)/3 cu units Hence the volume of a sphere is (32 πr3)/3 cu units.

Description : The radius of sphere is 2r, then find its volume. -Maths 9th

Last Answer : Volume of the sphere = 4/3.π.(2r)3 = 32/3πr3

Description : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity `omega.` the magnetic field produced by

Last Answer : There is a ring of radius r having linear charge density `lambda` and rotating with a uniform angular velocity ` ... D. `(mu_(0)lambda)/(2omega^(2))`

Description : Intensity of gravitational field of earth is maximum at – (1) Poles (2) Equator (3) Centre of earth (4) Surface

Last Answer : (1) Poles Explanation: perfect sphere of spherically uniform density (density varies solely with distance from centre) would produce a gravitational field of uniform magnitude at all points on ... are consequently slight deviations in both the magnitude and direction of gravity across its surface.

Description : Intensity of gravitational field of earth is maximum at (1) Poles (2) Equator (3) Centre of earth (4) Surface

Last Answer : Poles

Description : Which planet best to escape Earth when our sun gets too hot?

Last Answer : That depends on several factors: 1.: Are humans still around by the time your sun goes Red Giant? 2.: If so, have you advanced technologically far enough for large scale interstellar ... : If so, have you discovered any Class M or terraformable extrasolar planets within reasonable travel range?

Description : Minimum speed which a body must have to escape from the earth's gravitational force is called?

Last Answer : Escape Velocity

Description : How do you calculate the pressure exerted by the water on the bottom of a 2.75m deep swimming pool.(Gravitational field strength=9.8N/kg?

Last Answer : 1,000×2.75×9.8=26,950

Description : Read More Details about this McqTesla is the unit of-------------? A. Magnetic Field Strength (Answer) B. Electric Field Strength C. Gravitational Field Strength D. Nuclear Field Strength

Last Answer : A. Magnetic Field Strength (Answer)

Description : When the field is strong, the lines of force are: (a) Closer (b) Parallel (c) Farther (d) All of above 45. The electric lines of force determine the strength of an: (a) Gravitational field (b) Constant field (c) Magnetic field (d) Electric field

Last Answer : d) Electric field

Description : The expression for velocity of a wave in the conductor is a) V = √(2ω/μσ) b) V = √(2ωμσ) c) V = (2ω/μσ) d) V = (2ωμσ)

Last Answer : a) V = √(2ω/μσ)

Description : The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by (A) Cv . √(2gH) (B) Cc . √(2gH) (C) Cd . √(2gH) (D) Cv . Va

Last Answer : (A) Cv . √(2gH)

Description : A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to (A) √(Particle diameter) (B) Particle diameter (C) (Particle diameter)2 (D) (Particle diameter)3

Last Answer : B) Particle diameter

Description : What is the minimum escape velocity of rocket to be launched into space? (1) 5 Km/Sec. (2) 6 Km/Sec. (3) 11 Km/Sec. (4) 15 Km/Sec.

Last Answer : (3) 11 Km/Sec. Explanation: On the surface of the Earth, the escape velocity is about 11.2 kilometers per second 06.96 mi/s), which is approximately 34 times the speed of sound (Mach ... velocity is the speed at which the kinetic energy plus the gravitational potential energy of an object is zero.