What is free Fall?

Q: The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.57 m and 1.01 m, ...

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Q: How much work is done in ergs in pulling a box 2 m across a table top with a force of 20 N in horizo...

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Q: A ship steering in the direction 30° with a study speed of 12km/h and have site a ship B .The veloci...

A: Given, velocity of ship A is 12 km/ hr with an angle 30o with the x axis.  Let us consider the direc...

Q: What is the wavelength of a photon that has the same momentum as an electron with a speed of 2.69 m/...

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Q: Miranda, a satellite of Uranus, is as shown. It can be modeled as a sphere of radius 242 km and mass...

A: The expression for the surface gravity of the Miranda,   Substitute,   Therefore, the free fall ac...

Q: Explain about ROCKET PROPULSION.

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Q: A car traveling at 45 miles per hour is brought to a stop, at constant deceleration, 132 feet from w...

A: Given data: Initial velocity of car, u= 45 miles/hr= 66 ft/s Suppose, the deceleration = a and final...

Q: In the figure, an electron accelerated from rest through potential difference V1=1.26 kV enters the ...

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Q: Explain How to use Newton’s first law to solve problems involving the forces that act on an object i...

A: Introduction: An object will continue to move in a straight line until some external force is impres...

Q: EXAMPLE 25 The potential difference across the collector of a transistor, used in common emitter con...

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Q: What is Uniform Circular Motion?

A: The motion of the body following the circular path is called circular motion.

Q: A 18.9 g wire of length 88.6 cm is suspended by a pair of flexible leads in a uniform magnetic field...

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Q: A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.00 m a...

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Q: An object with a mass of 0.4 kg rotates in a circular orbit in the vertical plane, depending on the ...

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Q: What is flow line?

A: When the particles of the fluid displaces from the one point to the other point, then the path follo...

Q: The mass of earth is 6 x 1024 kg and that of the moon is 7.4 x 10 kg. If the distance between earth ...

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Q: How fast must a rocket travel relative to the earth so that time in the rocket "slows down" to quart...

A: The time dilation factor is given as, According to the problem the time will be half, so the veloci...

Q: Suppose the Sun’s gravity were switched off. The planets would leave their orbits and fly away in st...

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Q: What is the speed of an electron after being accelerated from rest through a 2.5×107 V potential dif...

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Q: Explain about choosing the reference point for calculating torques.

A: While calculating torque upon any rigid body the reference axis is to be taken through the center of...

Q: A glass sheet measuring 15.0 cmcm ×× 29.0 cmcm is covered by a very thin opaque coating. In the midd...

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Q: A square, single-turn wire loop, 5 1.00 cm on a side is placed inside a solenoid that has a cir-cula...

A: It is given that,

Q: Approximately how much energy is contained in one gallon of gasoline?

A: We are required to find the energy contained in one gallon of gasoline.  

Q: Two spheres of masses 100 kg and 900 kg each of radius 10 m and 20 m respectively. Find gravitationa...

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Q: Find the index of refraction of glass if a light beam falling from air to the glass surface at the i...

A: According to the snell’s law,  

Q: Describe about speed?

A: Speed

Q: (Figure 1) shows how the number of nuclei of one particular isotope varies with time.  What is the h...

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Q: A tank of depth 3.5 m is filled with fresh water (density=1000 kg/m3). (a) What is the pressure at t...

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Q: A bullet of mass 60 g moving with a velocity of 500 m s-' is brought to rest in 0.01 s. Find the imp...

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Q: If a diffraction grating produces a third-order bright spot for red light (of wavelength 670 nmnm ) ...

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Q: A particle moves in a straight line with the given velocity v(t) = 2 cos (t) (in m/s). Find the disp...

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Q: A radioactive isotope has a half-life of 72.0 min . A sample is prepared that has an initial activit...

A: (a) Initial radioactive nuclei

Q: What is a common instrument for measuring force magnitudes?

A: Instrument for measuring force