A 13.5 lb box is placed on the ground. (a)What force (in lb) does the ground exert on the box? magnitude? direction?   B) A cord is attached to the box and run through a pulley directly above the box, so that the cord is vertical. The free end of the cord is then connected to a hanging weight. Calculate the force exerted by the ground on the box (in lb), if the hanging weight is 11.0 lb.magnitude?direction?

Q: A small, square loop carries a 27 A current. The on-axis magnetic field strength 46 cm from the loop…

A: Given data: Current, I=27 A Distance from the loop, x=46 cm=46×10-2 m=0.46 m Magnetic field…

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Q: A free particle of mass 1E-6kg has an energy of 1.9E11 Joules What is the momentum of the particle?…

A: Given Data: Mass of free  particle m=1×10-6 kg Energy of particle Energy=1.9×1011 J

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A: Work done=3567.2 j

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Q: An air bubble frozen in ice is extracted from many meters below the surface in the arctic. The…

A: Activity (A) = 0.8 % of the original activity

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A: Visualize the Problem:

Q: explain paschen‘s law.

A: The characteristics of the gas breakdown voltage between two electrodes are described by Paschen's…

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Q: A block of mass m = 240 kg rests against a spring with a spring constant of k = 550 N/m on an…

A: Given that, the mass of the block is m=240kg spring constant is k=550N/m maximum compression of the…

Q: 2- cathode-ray tube accelerates an electron from rest across a potential difference of 5 KV: a. What…

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Q: A 90kg bungee jumper jumps from a bridge 40m above the river. The bungee cord has an unstretched…

A: Given:-  The mass of the bungee jumper m = 90 kg ' The height of the bridge is h = 40 m above the…

Q: If I place equal amounts of butter on the tip of a metal spoon, plastic spoon, and wooden spoon and…

A: According to the question, an equal amount is on the spoon and dipped into the hot water. There are…

Q: A sailboat race course consists of four legs, defined by the displacement vectors ABC, and, as the…

A:

Q: uppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How many…

A: given data as per question  mass = 2000g temperature  = 20

Q: Which of the following statements is true about an eye that is nearsighted?   a) The image is in…

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Q: Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. When…

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Q: 500 g string has length 10 m and is open at both ends. The force along the string is 40 N. Which one…

A:

Q: Consider the energy levels of the Hydrogen atom, which are given by the equation: En = 13.6 eV n²…

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Q: (1) If a ball was thrown horizontally off a 155 meter cliff with a velocity of 13.5 m/s; (a) How…

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Q: For a given person, as the time needed to run up a flight of stairs decreases, the power ___.…

A: Given data:  The time needed to rup up a flight of stairs decreases Required: The power decreases or…

Q: Two light waves of the same frequency start out in phase (with amplitudes going up at the same…

A: Path difference between two wave =600nm Wavelength of light =400nm

Q: Consult Concept Simulation 2.1 before starting this problem. The Kentucky Derby is held at the…

A: distance (d) = four quarter miles = 1 mile initial velocity (v) = 16.58 msacceleration (a) = 0.0105…

Q: The figure shows wire 1 in cross section; the wire is long and straight, carries a current of 4.07…

A: i1= 4.07 mA i2= 7 m A d1= 2.46 cm d2= 5.32 cm

Q: Each sketch below shows three objects with an electric charge. In each case, decide whether there is…

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Q: A capacitor is made from two flat parallel plates placed 0.40 mm apart. When a charge of 0.020 µC is…

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Q: Which

A: Position Velicity Acceleration all these quantities depends on frame of reference.

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Q: Ida Haitarun is captain of the Varsity cross country team. During the after-school practice on…

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Q: 8 H² + ¿←0% + U

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A: Let, Q - Heat energy m - Mass c - Specific heat capacity ∆T - Change in temperature

Q: You may want to review (Page 796). For help with math skills, you may want to review: The Vector…

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Q: A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible…

A: Length (L) = 0.78 m initial velocity at the bottom (v) = 2.3 msmaximum angle = θ

Q: Suppose a motorcycle accelerates for t = 6 seconds at a constant rate of acceleration (a = 2.5…

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Q: 5. Two blocks connected by a string are pulled across a horizontal surface by a force applied to one…

A: Given data: The left block mass, m1=1.1 kg The right block mass, m2=4.1 kg The angle, θ=59°. The…

Q: What is the strength of the magnetic field at point P in the figure? (Figure 1) Assume that I = 4.6…

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Q: A box of mass 5 ?? is placed 1.5 ? at the end of a plank pivoted in the middle. Another box of mass…

A: We have to use to concept of rotation equilibrium to solve this problem

Q: 6) How many 60 Watt bulbs would it take to equal the luminosity of the Sun? a. 1000 b. 2.4 X 10^26…

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Q: Sunlight has a power of 1400 watts/meter2.  What is the amplitude of the electric field of sunlight?…

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!