2. Standing on a balcony, you throw your keys to the ground. 1 second after you release the keys, they have an instantaneous velocity of 13.9 meters per second directed at 45 degrees below the horizon. What is the initial velocity of the keys?

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Q: A 0.75 kg book is resting on a table and is then pushed by a horizontal force of 0.25 N. Question 3:…

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Q: Light of wavelength 441 nm is incident on a diffraction grating that has 1.67 x 10° lines/cm. What…

A: Given that:-Wavelength, λ=441 nm=441×10-9 mNumber of lines per cm=1670Number of lines per…

Q: What is the difference in maximum stored energy between the sprinters and the non-athletes

A: Given, Spring constant , k = 33 N/mm stretch in sprinter , x1 = 44mm = 0.044 m stretch in sprinter ,…

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A: Given that v=400m/s, f=261Hz and linear density=0.417g/m

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Q: F, max t (ms) 8 10 2 4 6.

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Q: A large piece of wood is at rest on a horizontal floor. The coefficient of kinetic friction between…

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Q: How much work is done to expand a 10-cm diameter cylindrical chamber at 1 atm from a length of 10 cm…

A: Hence, the work done is 79.58 J

Q: IeFs Make Physical gas liquid States What They Are: 10-mph! > shape: In ? Definite In ? Definite

A: Required : Properties of gas, liquid and solids.

Q: The mean diameters of planets A and B are 8.8 x 10³ km and 1.6 × 104 km, respectively. The ratio of…

A: Diameter of planet A = DA = 8.8 x 103km = 8.8 x 106 m  Diameter of planet B = DB = 1.6 x 104km =…

Q: A square wire loop with 1.5 m sides is perpendicular to a uniform magnetic field, with half the area…

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Q: 11. Two disks are cut from the same uniform board. The radius of disk B is twice the radius of the…

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Q: A ball is tossed vertically with non-zero positive initial velocity. Which of the following is true…

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Q: (a) Compute the potential energy stored in the bow, if the arrow of mass 5.50 x 10 energy is…

A: Givenm=5.5×10-2  kgv=37.0 m/s

Q: A chemistry grad student measures the performance Z of the new pump in his lab. The result is:…

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Q: A 59 kg person climbs up the stairs with a height of 5.5m. Where does the energy come from to cause…

A: Energy come from to cause this increase as potential energy Potential energy increase in this case…

Q: What is the kinetic energy of a 4 kilogram cat runnig at 5 m/sec ?

A: given that,mass of cat, m=4 kgvelocity of cat, v=5 ms

Q: (9 polnts) Consider the initial value problem if 0<t<1 10 if 1 <t <5 if 5 <t< 00, y +4y = y(0) = 2.…

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Q: I| Two small metal cubes with masses 2.0 g and 4.0 together by a 5.0-cm-long massless string and are…

A: The energy of a system due to its position is known as potential energy(U), and is given as, U =…

Q: A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a…

A: We are allowed to give the explanation of first question only which is given below.  Please repost…

Q: 9. How quickly would the 50kg box accelerate if the person applied a 590N force? m/s 10. How quickly…

A: 9. Given, Mass of the box: m = 50 kg Applied force: F = 590 N According to newton's law of…

Q: 9b) Suppose you wanted to store 3 µC of charge in a capacitor across a voltage of 120 V.What…

A: Given: Here, the given details are, Suppose you wanted to store 3 μC of charge in a capacitor across…

Q: A. Consider a system at fixed volume, V= Vo, in diathermal contact with a thermal reservoir at fixed…

A: In this question we are given with a system at fixed volume, V=V0 i diathermal contact with a…

Q: A box of pizza is placed at the tabletop, 0.74 meters high from the floor which is inside a…

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Q: Part A to find the on-axis electric field of a charged disk. Use the on-axis potential of a charged…

A: Solution:   Given that,   on-axis potential of a charged disk: Vdisk on axis=Q2πε0R2R2+z2-z

Q: At a particular point in orbit a satellite in an elliptical orbit has a gravitational PE of 6000 MJ…

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Q: A golfer hits a golf ball with a club head angled at 35°. He swings with a velocity of +50.0 m/s .…

A: Given, initial velocity u=50m/s, Angle of projection θ=35°. Required,  Time to hit the ground…

Q: The magnetic field in (Figure 1) is decreasing at the rate 0.60 T/s. Figure What is the magnitude…

A: Given rate of decreasing magnetic field dBdt = 0.6 T/s radius of circle r = 1 cm = 0.01 m

Q: The average coefficient of volume expansion for carbon tetrachloride is 5.81 x 10 (°C)1. If a 56.5…

A: Given,   Coefficient of volume expansion(β) = 5.81×10-4C0-1   Vi = 56.5 gal   ∆T = 240C

Q: 8, = 20m/so, = 20m/s :A stone trough away with the velocity of from the hight of 45 m with an angle…

A: Horizontal range of projectile fired from the height is as follows: R=uxTR=ucosθT…

Q: A mass m is placed a distance D to the right of a disc along its central axis. The disc has a mass M…

A: The system is shown below. Consider a thin ring having mass dm and radius R.

Q: Running a car’s air conditioner usually increases fuel consumption. But, at certain speeds, a car…

A: due to air resistance.

Q: Assuming running consumes 108 calories per mile. If you run 9 minute miles, what is your average…

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Q: A car requires 170kiloJoules to accelerate from 23m/s to 28m/s. If this happens over 2 seconds, what…

A: Power is defined as the rate of doing work. Power is a scalar quantity and the SI unit of power is…

Q: much

A: given  mass of person m = 75 kg  height h = 15 m  efficiency = 25 %   1 Cal = 4.2 J

Q: A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The player's foot is…

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Q: In the figure below, the masses of each object are: m₁ = 1 kg, m₂ = 4 kg, m3 = 4 kg. The labeled…

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Q: higher watts can charge the battery

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Q: A narrow beam of ultrasonic waves reflects off the liver tumor in the figure below. If the speed of…

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Q: Does the International Space Station have gravitational PE? KE? Explain.

A: The gravitational potential energy is the energy possessed by a body due to its position in a…

Q: An engine does 7500 J of work in one minute. The power output of the engine is 125 flb/s 0.17 hp 6.0…

A: Work done,(W) by an engine=7500 J -----(1) [Given] Time taken,(t) by an engine=1 min=60 sec -----(2)…