1. If r = ti − t²j + (t− 1) k and s = 2t²i + 6tk evaluate www -2 r. sdt a. 0 -2 b. Srx sdt 0

Q: 7.) (Based on Neamen, Problem 14.16) - A solar cell at room temperature has a reverse saturation…

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Q: In the figure, two semicircular arcs have radii R₂ = 6.88 cm and R₁ = 3.60 cm, carry current i =…

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Q: A 1.5-m length pendulum is displaced by an initial angle = +6° and released from rest. If the…

A: Frequency of oscillations is proportional to acceleration due to gravity and inversely to length for…

Q: 6. A solid disk rotates in the horizontal plane at an angular velocity of 4.10 × 10-2 rad/s with…

A: Angular velocity, ω = 4.10×10-2 rad/s = 0.041 rad/s Moment of inertia of disk, I = 0.17 kg.m²…

Q: (a) A cosmic-ray proton in interstellar space has an energy of 21.0 MeV and executes a circular…

A: a) Charge of a proton q = 1.6*10-19c Given, energy E = 21.0MeV = 20.1*106eV                        E…

Q: A spring of unstretched length L and spring constant k is attached to a wall and an object of mass M…

A: Frequency of oscillations is proportional to spring constant and inversely to mass. A restoring…

Q: Find the resultant vectors. 1. A 10 M, NORTH = B = 20 M, NORTH 2. C= 15 M, WEST D = 20 M, WEST 3.…

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Q: How much work is done in moving a charge of 3 C across two points having a potential difference 15…

A: Introduction :  In this question we are provided it value of charge and potential difference . With…

Q: • 12V R₁ R3 5A JSA 6 A 3 3도 2AM R₂ RA

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Q: A boll rounds a 60 m radius curve at 6 m/s. The magnitude of it's acceleration in m/s²

A: Given data:  Radius (r) = 60 m Speed (v) = 6 m/s Required: The acceleration (a)

Q: A lever of length 200 cm has an effort of 20 kgf at a distance of 50 cm from the fulcrum at one end.…

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Q: explains the photoelectric effect.

A: In this question we have to explain the photoelectric effect. Please give positive feedback if the…

Q: A block of mass 2.0 kg is moving to the right and changes its speed from 3.0 m/s to 1.0 m/s. Match…

A: Given data:  Mass (m) = 2.0 kg Initial velocity (Vi) = 3.0 m/s Final velocity (Vf) = 1.0 m/s…

Q: A particle moving in the x-y plane has a position vector given by r = 0.81t²i +0.74t³j, where r is…

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Q: For scientific work, the -- temperature scale is used

A: There are different temperature scales , Which includes  1) Celsius  2) kelvin  3) Fahrenheit    and…

Q: Find the momentum Mass=5.012 kg Velocity=0.33 m/s

A: Given data : Mass=m Velocity=V   Required : Momentum

Q: Find the pressure Force=0.2 N Area=0.1 cm2

A: Given  Force (F) = 0.2 N  Area (A) = 0.1 cm2                  = 0.1 × 10-4 m2…

Q: Q6. You push a 100-kg file cabinet to the right on a rough horizontal surface with a force of 500 N,…

A: Given:-  The mass of the cabinet m = 100 kg  The pushing force is Fpush  = 500 N  The coefficient of…

Q: 2. in free space, let Q1 = 10nC be at P1 (0,4,0) and Q2 = 2-nC be at P2(0,0,4). Find E at the…

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Q: A cat has volume 0.08 m³ and density 670 kg/m³. Find the mass of the cat ?

A: Given data: Volume of the cat, V=0.08 m3 Density of the cat, ρ=670 kg/m3 Our question is to find…

Q: (a) A cosmic-ray proton in interstellar space has an energy of 21.0 MeV and executes a circular…

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Q: A resistor R is connected in parallel with a 10-ohm inductive reactance. The combination is then…

A: In this question we have to find the value of Resistance R. Please give positive feedback if the…

Q: Q/ The velocity of a car A is to 5î + 11ĵ. The velocity of another car B is 111 + 5ĵ. What is the…

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Q: Find the displacment Work done=0.334 J Force=3 N

A: Given data : Force=F Work done=W   Required : Displacement

Q: 5 m O OO 5m 15 m 20 m 20.7 m e 25.7 m b С d -P

A: Radius of semicircular path    R = 5 m  Total Length of path  L =  πR + 10 m       =  π ×5 m + 10m…

Q: The 25-Mg boxcar A 16m/s to the right is coasting on the horizontal track when it encounters a 9-Mg…

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Q: Absolute pressure accounts for atmospheric pressure, which in effect adds to the pressure in any…

A: The absolute pressure(  Pabs) is defined as the sun of gauge pressure (Pgauge) and atmospheric…

Q: Two large steel spheres tap into each other slowly, yet manage to exert a force on each other that…

A: Write the given data. F=4000 N

Q: 1. A 40.0 kg rider is upside down at the top of a vertical circle that has a radius of 8.00 m. At…

A: Given, In the problem 1, Mass of the rider M1=40 kg.  The radius of the vertical circle (R) =8m. In…

Q: On earth the weight of a body mass 3 kg is 30N. What will the weight of a men having mass 45 kg…

A: GIVEN: Force on 3 kg mass of body = 30N

Q: Two springs are attached end to end to a box of mass M as shown in the figure. Determine an…

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Q: Problem 11.54 A 73.0 kg weight lifter is doing arm raises using a 7.50 kg weight in her hand. Her…

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Q: A lever of length 200 cm has an effort of 20 kgf at a distance of 50 cm from the fulcrum at one end.…

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Q: Determine the resultant R (single equivalent force) of the three forces acting on the simple truss.…

A: In this question we have to find the Resultant in vector form. Please give positive feedback if the…

Q: A particle with potential energy U is at rest at x = a . The particle: a.moves to a point to the…

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Q: 1. A Ferris wheel with a diameter of 36.0 m starts from rest and achieves it maximum operational…

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Q: An electric heater of Power 147 W has a resistance 352. Find the magnitude of current. of

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Q: Problem 11.67 Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has…

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Q: Two masses, m_1=1.0 kg and m_2=5.0 kg, are linked by a string through a pulley as shown in the…

A: Let the acceleration of m1​ be a upwards. Then the acceleration of m2 will be a downwards. From the…

Q: thermometer does not use mercury.

A: In this question we have to answer which thermometers do not use mercury.Please give positive…

Q: HE Problem 9: Consider the sign shown in the figure, which has a mass of m= 8.2 kg. sin() cos()…

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Q: P is 160 N that pushes a 20.0 kg cube on a rough surface, over a distance of 8.00 m, the speed…

A: In the given question, Magnitude of force P = 160 N Mass of cube (m) = 20 kg Distance travelled (s)…

Q: SOLUTION IS NEEDED. You are to design a device that will conduct 250 J/s from a hot furnace of…

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Q: Calculate the centripetal force a 2kg mass experiences as it spins at the constant tangential speed…

A: Given data:  Mass (m) = 2 kg Speed (v) = 5 m/s Radius (r) = 2 m Required: Centripetal force (Fc)

Q: A truck travels 65 km in first hour and 78 km in second hour. What is average speed of truck ?

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Q: B) Determine the internal optical power of the double hetetostructure LED has 85% quantum efficiency…

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Q: 1A SPeaker is placed in open area Determine how far you must Stand From that Speaker to receive an…

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Q: uilding. One of the movers is pushing on the crate with a force of constant magnitude F₁ arallel…

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Q: (II) How many kWh of energy does a 550-W toaster use in the morning if it is in operation for a…

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Q: The graph of voltage (independent variable) vs current (dependent variable) should have voltage on…

A: Given,  Data points measured from the experiment are as follows; Serial No; Voltage (V)  (Volt)…

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: