When you drop an object from a certain height, it takes time T to reach the ground with no air resistance. If you dropped it from three times that height, how long (in terms of T) would it take to reach the ground?

Q: A hydrogen atom in an excited state absorbs a photon of wavelength 410 nm. What were the initial and...

A: The energy of a photon of wavelength is E=hcλ E is the energy, h is the Planck’s constant. Use the g...

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A: Expression for kinetic energy and gravitational potential energy K=12mv2Ug=mgh

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A: number of forces in plane = 3 (centripetal , tension and weight)

Q: Blocks A and B of Fig. have 20- and 50-kg masses, respectively. The static coefficients of friction ...

A: Given data: The mass of the block A is mA=20 kg. The mass of the block B is mB=50 kg. The coefficie...

Q: *PLEASE ANSWER QUESTIONS #7* Make a sketch of the trajectory of a ball after it has been thrown. Dr...

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Q: A thin layer of ice (n = 1.309) floats on the surface of water (n = 1.333) in a bucket. A ray of lig...

A: Part-a Given: The refractive index of ice nice = 1.309. The refractive index of water nw = 1.333.

Q: The moon has a mass of 7.35 * 1022 kg, and the length of a sidereal day is 27.3 days. (a) Estimate t...

A: Hi. Since you have posted a question with multiple subparts and not specified which subparts you wan...

Q: a) What is a binary star system? (b) describe briefly two methods for showing that a system is a bin...

A: (a) A binary star system is a system of two stars orbiting each other around a common center. Binary...

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Q: a. A patient's chest is exposed to X-rays, and the X-rays passing through the patient are recorded o...

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Q: Starting from a pillar, you run 200 m east (the +x-direction) at an average speed of 5.0 m>s and ...

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Q: How does the tension per unit length resulting from connecting N identicalsprings end-to-end (or “in...

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Q: Consider a simple pn-junction diode. Suppose this diode carries a current of 50 mA with a forward bi...

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Q: Moseley found experimentally that the equation describing the frequency of the La spectral line was ...

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Q: Determine the angle a under which a projectile must be launched from point o so that it reaches the ...

A: The shortest distance will have the shortest time. The shortest distance between the point O and the...

Q: Astronomers discover a planet orbiting around a star similar to our sun that is 20 lightyears away. ...

A: The distance to the planet for an observer on earth is 20 light years. For the entire round trip the...

Q: Does it make sense to say that one vector is the negative of another? Why?

A: yes it make sense. suppose there are two vectors say A and B. if one vector is the negative vector o...

Q: Aluminum has a density of 2.70 x 103 kg/m3 at a temperature of 293 K, and its molar mass is 26.98 g....

A: (a) The number of aluminum atoms per unit volume is 2.70×103kg/m31mol26.98×10-3kg6.022×1023mol=6.03×...

Q: In a large vacuum chamber, monochromatic laser light passes through a narrow slit in a thin aluminum...

A: Given: The distance between slit and the screen is d=0.620 m. The initial temperature of the plate ...

Q: The quantum model of the atom attempts to describe what atomic characteristic?   Neutron and electro...

A: The quantum mechanical model of an atom was developed by Erwin Schrodinger. According to this model,...

Q: 50.0 g of warm water is added to 50.0 g of cold water in a Styrofoam calorimeter. The initial temper...

A: The gain or loss in heat of a substance can be calculated by the following formula, Here m is the m...

Q: In the second type of helium-ion microscope, a 1.2 MeV ion passing through a cell loses 0.2 MeV per ...

A: The energy loss is . Eloss=0.2 Mev/mm=0.2×106 eV/mm the final energy measured is 6 keV or 6000 eV.

Q: The mass of the most common silicon atom is 4.646 * 10-26 kg, and the mass of the most common oxygen...

A: The wavenumber for rotational energy is: ν=BJJ+1=h28π2Icll+1 where, ν is the wavenumber. I is the mo...

Q: Albert Einstein is probably the most famous physicist of all time. He is best known for his studies ...

A: When an electromagnetic radiation (light) is hitting on a material  and  if the energy ( or frequenc...

Q: does NOT. How on earth can this be? What is different about the dynamics of a hoop that rolls withou...

A: For the skater all the potential energy of the skater changes into kinetic energy if we neglect fric...

Q: An electromagnetic wave with frequency 65.0 Hz travels in an insulating magnetic material that has d...

A: (a)Speed of propagation of the electromagnetic wave in a material medium,v=cμ0ε0                    ...

Q: The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature i...

A: Rewrite the expression number of vacancies for two difference temperatures NV=Ne-QVkTNV1=Ne-QVkT1   ...

Q: A coworker of yours was making measurements of a large solenoid that is connected to an ac voltage s...

A: Given: The voltage of the source V = 12 V.  

Q: In a naturally occurring sample, 19.8% of boron atoms have 5 neutrons and 80.2% have 6 neutrons. Wha...

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Q: A muonic atom consists of a muon (mass m = 106 MeV/c2 and charge q = -e) in place of an electron. Fo...

A: The reduced mass of muon when it is in place of an electron is μ=mMm+M m is the rest mass of the muo...

Q: A 60kg skateboarder (including the skateboard) wants to figure out how fast he needs to be traveling...

A: Mass of the skateboarder (including skateboard) m = 60 kg The diameter of the path d = 14 m

Q: On a separate occasion, Michael threatened to jump from the roof of hisoffice building as a demonstr...

A: (a) final velocity  v=u+gt=0+9.8 m/s21.2 s=11.76 m/s≈12 m/s

Q: You push your physics book 1.50 m along a horizontal tabletopwith a horizontal push of 2.40 N while ...

A: The work done by a constant force,F  during straight line displacement d is, W=Fscosθ               ...

Q: A monochromatic light source with power output 60.0 W radiates light of wavelength 700 nm uniformly ...

A: The magnitude of maximum electric field is, Emax=2IεocEmax=2PAεocEmax=2P4πr2εocEmax=P2πr2εocEmax=60....

Q: Complete the following reactions. (a) µ- + p → n + ? (b) n + p → ∑0 + n + ?

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Q: The Sun on the right is shining on the four planets to the left. Each planet has an axis of rotation...

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Q: A man weighing 73 N stands at the middle rung of a steel ladder uniformly weighing 43 kN/m. Assuming...

A: Given: The weight of the man is W=73 N. The weight per unit length of the ladder is w=43 kN/m. Ref...

Q: a. Compute the binding energy of the reactants and of the products in the nuclear fusion reaction   ...

A: The expression for the binding energy is as follows: BE=Zmp+A-Zmn-Mc2................(1) Here, Z is ...

Q: A steel ball with mass m is suspended from the ceiling at the bottom end of a light, 15.0-m-long rop...

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Q: Calculate (a) the total binding energy and (b) the binding energy per nucleon of 12C. (c) What perce...

A: Part (a) The standard values for carbon atom is given by, The mass of neutron is mn=1.00893 amu. Th...