A vector has both a direction and a "magnitude", or length. An example of a vector quantity is the wind, which has both a direction and a strength. What is the magnitude of the vector 32+ -92 + 7k?

Q: 32. A kite 100 ft above the ground moves horizontally at a speed of 8 ft/s. At what rate is the…

A: Given data, Let the kite-flying child's position on the ground serve as the origin.  Let x represent…

Q: A uranium nucleus  238U (initially at rest) decays into a thorium nucleus 234Th and an alpha…

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Q: Two blocks, of masses M = 1.6 kg and 2M, are connected to a spring of spring constant k = 240 N/m…

A: Given that, The mass of the block which is on the plane is m1=M=1.6kg The mass of the hanging block…

Q: Recall Newton's Second Law relating the acceleration of an object to its mass: F a m Suppose an…

A: Given that, the mass of the object is m=7kg the initial velocity of the object is…

Q: Suppose you are playing hockey on a new-age ice surface for which there is no friction between the…

A: Here we can consider the ice and hockey puck as a system.

Q: Based on the kinetic energy of each object, which of the scenarios likely describes an object…

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Q: Consider the system of capacitors shown in the figure below (C₁ = 3.00 μF, C₂ = 5.00 μF). 6.00μF HH…

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Q: The diagram below shows the lab set-up. The meter stick is resting on a fulcrum and has a hanger…

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Q: Two airplanes are flying in the air at the same height. Airplane A is flying east at 451 mi/h and…

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Q: An AC voltage source and a resistor are connected in series to make up a simple AC circuit. If the…

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Q: A particle with a charge of 18.9 mC moves along the x-axis with a speed of 49.9 m/s. It enters a…

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Q: The most rotor IR loss is dissipated in the external resistances the internal resistances the…

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Q: A student performing the same lab on equilibrium as you collect the data shown in the table below…

A: Given, Table, center of mass position clamp position hanger position 48.3 cm 35.4 cm 25.5 cm

Q: Unpolarized light with an intensity Io passes through a linear polarizer. It then passes through a…

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Q: A concave shaving mirror has a radius of curvature of +37.9 cm. It is positioned so that the…

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Q: Given the two vectors shown in the figure, calculate a) 2.00(B-C) b) -5.00 (B × C) There are no…

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Q: 8 H² + ¿←0% + U

A: We have to use conservation of charge to solve this problem

Q: Parallel light rays cross interfaces from medium 1 into medium 2 and then into medium 3. What can we…

A: Here,  It is given parallel light rays cross interfaces from medium 1 into medium 2 and then into…

Q: A rocket drifts sideways in outer space from point "a" to point "b" as shown below. The rocket is…

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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…

Q: Problem 3: UP 8.72 Three capacitors having capacitances 8.4 µF, 8.4 µF, and 4.2 µF, are connected in…

A: C1 = 8.4 μF C2 = 8.4 μFC3 = 4.2 μF V = 36 volts

Q: Find the rock’s speed when hitting the surface   of the moon.

A: Given  Speed with which rock was launched from surface of moon u = 24 m/s Acceleration of rock  a =…

Q: average lifetime of 2.60*10^-8s. In a high-energy particle accelerator, these particles reach a very…

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Q: The temperature at the surface of the Sun is approximately 5,100 K, and the temperature at the…

A: temperature of surface of sun(TS)=5100 K Temperature of surface of earth(TE)=291K Energy(Q)=4.50 X…

Q: Blocks 1 and 2 are stacked as shown below with m₁ =6.74 kg and m₂=4.33 kg. The coefficients of…

A: Given, m1 = 6.74 kg m2 = 4.33 kg µs = 0.838 µk = 0.577 F = 150 N

Q: The drawing shows a 20.5-kg crate that is initially at rest. Note that the view is one looking down…

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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: A tetherball swings in a horizontal circle. If the radius of the swing is increased 9 times but the…

A: Required concept: Centripetal force is given by the formula, Fc=mv2r  m - Mass of the object v -…

Q: A telephone cable is stretched between two poles with a tension force of 3000 N. The cable has a…

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Q: An electrical space heater uses coils of Nichrome wire to produce heat. Nichrome has a resistivity…

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Q: What is the maximum speed (in m/s) of a 4.9 g particle that oscillates between x = 2.0 mm and x =…

A: mass (m) = 4.9 g = 0.0049 kg the oscillation is between 2 mm and 8 mm The potential energy in units…

Q: Please help on this, try so long still can't get the correct answer.

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Q: Stars A and B both have the same spectral class. Star A is 7 times farther away than star B. The…

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Q: The take off speed of a military aircraft from an aircraft carrier is approximately 170 mi/hr…

A: Speed of aircraft=160mile/hr Speed of carrier =40mile/hr Speed of wind=20mile/hr

Q: A 33.0-cm long solenoid 1.25 cm in diameter is to produce a field of 4.50 mT at its center. Part A…

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Q: A wire carries a current of 12 A in a direction of 30° with respect to the direction of a 0.31-T…

A: Given value --- Current = 12 Amp. angle = 30 degree . magnetic field = 0.31 T. length = 0.5 m. We…

Q: Despite a very strong wind, a tennis player manages to hit a tennis ball with her racquet so that…

A: Let's check each option one by one • A downward force of gravity This option is correct.…

Q: A spring with spring constant 28 N/m is compressed a distance of 9.0 cm by a ball with a mass of…

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Q: A pendulum makes 42 cycles in 63 seconds. (a) What is the frequency and period of the pendulum? (b)…

A: Given data:  Number of cycles = 42 Total time = 63 s Required: Frequency (f), Period (T) and length…

Q: Says both answers are wrong

A: (a) By work energy theorem, (1/2)kx2 + (mgsinθ)x = (1/2)mv2 (1/2)*180*0.182 + (1.7*9.8*sin36)*0.18 =…

Q: Q5: A 4 kg block is attached to a vertical rod by means of two strings of equal length. When the…

A: Given data: The mass of block is m=4 kg. The tension in the upper cord is T=20 kg.   The tension in…

Q: potential energy due to height is: P E h   =   m * g * h and kinetic energy is: K E   =   1 2 m v…

A: Idea of doing this problem is first picturing the roller coaster. Applying conservation of energy…

Q: Calculate the speed of sound on a day when a 2350 HZ frequency has a wavelength of 0.315M.

A: We know,  Speed of wave (v) = frequency (f) × wavelength (λ)

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: . A battery of emf 10 V and internal resistance 3. connected to a resistor. If the current in the…

A: We have a battery of EMF E=10 V and internal resistance r=3 ohm which is connected to a resistor say…

Q: Two identical springs, A and B, each with spring constant k = 30.7 N/m, support an object with a…

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Q: (c) Under what condition(s) can we treat the acceleration due to gravity as a constant? Explain what…

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Q: 3. Your friend is waiting below your second story apartment window for you give him the keys so he…

A: a) Since keys are caught by the friend at 1 m above the ground. So, the keys will fall only 9 m.…

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: There still seems to be an issue with this answer when I put it into the database

A: Write the relativistic expression for the momentum. p=mv1−v2c2 Here, m is the mass of the particle,…

Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.