A brick is dropped (zero initial speed) from the roof of abuilding. The brick strikes the ground in 1.90 s. You may ignore airresistance, so the brick is in free fall. What is the magnitude of the brick’s velocity just before it reaches the ground?

Q: A gas phase nanoparticle source is producing nanoparticles with an average size of 2.0 nm.  If you w...

A: Given:-Size of nanoparticle (a) = 2.0 nmSize of surface area (S) = 2.0 cm

Q: A typical adult human has a mass of about 70 kg. (a) What force does a full moon exert on such a hum...

A: (a) The expression for gravitational force is, Fg=GmM r2      (I)            G=gravitational constan...

Q: A solid sphere of radius 40.0 cm has a total positive charge of 20.0 uC uniformly distributed throug...

A:

Q: This is under Kinematics. Free-fall.

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Q: The wheel of a stationary exercise bicycle at your gym makes one rotation in 0.670 s. Consider two p...

A: (a) speed of a point on the wheel v=rω=rθt

Q: A very heavy SUV collides head-on with a very light compact car. Which of these statements about the...

A: Consider the collision to be inelastic. Kinetic is not conserved in an inelastic collision whereas m...

Q: An amusement parkride consists of airplane-shaped carsattached to steel rods.Each rod has a length o...

A: Given data: The length of the each rod is L=15.0 m. The cross-sectional area of the road is A=8.00 ...

Q: Answer each of the following relative to the center of the wheel. F = unit v r = unit v unit v %3D %...

A: Force is given as 3N thus F= 3N if r is radius of wheel then  r = 50 cm ( 5 grid long ) r = 0.50 m  

Q: Q4:BodyA in Fig. 6-33 weighs 102 N, and body B weighs 32 N. The coefficients of friction between A a...

A:

Q: please very soon full explanation

A: Let m0 denote the initial mass, m denote the mass after time t, v denotes the final speed of the roc...

Q: *PLEASE Help with #4* Make a drawing of the path of an object in circular motion at constant speed....

A: Let a particle moves on a circular path with centre C as shown below. Consider two neighbouring posi...

Q: An airplane has a mass of 1.60x10⁴kg, and each wing has an area of 40.0m2. during the level flight, ...

A: Pressure difference is, PL-PU=FG2APU=PL-mg2A

Q: The energy of an electron at speed v in special relativity theory is mc2(1−v2/c2) −1/2, where m is t...

A: According to the question,

Q: not sure how to do a), b), or c)

A: Given: The anatomy mainly includes the electrostatic shock based on the least head, hand, thumb, fig...

Q: Change in Kinetic Energy: Compare the increase in your car's Kinetic energy as it speeds up from 5m/...

A: The curb weight of Honda Accord 2014 V6 EX-L is 3358 lbs. Change in kinetic energy ΔK=Kf-Ki=12mvf2-v...

Q: A rather ordinary middle-aged man is in the hospital for aroutine checkup. The nurse writes “200” on...

A: Solution: The nurse writes "200" on the patient's medical chart with no units. Let us analyze some p...

Q: Q5:In Fig, a slab of mass m1 =40 kg rests on a frictionless floor, and a block of mass m2 =10kg rest...

A: Given slab has mass m1=40kg, And block has mass  m2=10kg Coefficient of static friction between bloc...

Q: A particle of mass 3m is located 1.00 m from a particle of mass m. (a) Where should you put a third ...

A: (a) The net gravitational force at mass M due to mass m and 3m is zero. The expression to solve for ...

Q: A cube of oak wood with very smooth faces normally floats in water. Suppose you submerge it complete...

A: There is no water under the face means no upward force and all the forces including gravity towards ...

Q: Consider a spacecraft’s power source consisting of 210Po, which emits a 5.3-MeV alpha particle, t1/2...

A: Part (a) Given: The energy of alpha particle is E=5.3 MeV. The half life of polonium is t1/2=138 da...

Q: A tractor of mass 5.40 tonne pulls a 1.40-tonne crate up a hill with a slope angle of 12.0° above th...

A: The given situation can be seen as,

Q: Two people carry a heavy electric motor by placing it on a light board 2.00 m long. One person lifts...

A: (a) The vertical forces acting on the board by applying equilibrium condition, FL+FR=W Use the given...

Q: The moment of inertia of thehuman body about an axis through its center of mass is importantin the a...

A: Torque in terms of angular acceleration and moment of inertia τ=Iα=It+Ipα

Q: The Sun has a mass of 1.99 × 1030 kg and a radius of 6.96 × 108 m. 1) Calculate the acceleration due...

A: 1. The expression for acceleration due to gravity is, gSun=GMSunrSun2        (I)            G=gravit...

Q: Q7: Block B in Figure rests on a surface for which the static and kinetic coefficients of friction a...

A: Given mB = 20kg  ns = 0.6  nk = 0.4  

Q: A satellite 575 km above the earth’s surface transmits sinusoidal electromagnetic waves of frequency...

A: (a) The intensity of the wave is I=PAI=P4πR2I=25×103 W4π575×103 m2I=6.02×10-9 W/m2 (b) The amplitude...

Q: Suppose a piano tuner stretches a steel piano wire 5.5 mm. The wire was originally 0.825 mm in diame...

A: The Young's modulus of the material is given by Where E = Young's modulus, F = Force exerted on the...

Q: Help me fast....I will give Upvote

A: The torque (τ) is given by, Here, r denotes the length of the point of the applied force with the p...

Q: A river flows due south with a speed of2.0 m/s. You steer a motorboat across the river; your velocit...

A: Let vr denotes the river speed, vbr denotes the boat speed relative to the river, vb denotes the boa...

Q: In a proton accelerator used in elementary particle physics experiments, the trajectories of protons...

A: Given: The magnetic field of the magnet is B=4.80 T. The volume of space is V=10.0 cm3. The formul...

Q: The Van Allen belts located above the poles of the Earth have significant magnetic fields. When char...

A: Answer: 1) It is given that,    The Van Allen belts located above the poles of the Earth have signif...

Q: A 5.60 kg bucket of water is accelerated upward by a cord of negligible mass whose breaking strength...

A: The maximum net force which accelerates the bucket is, F=Fbreaking-WF=75.0 N-mgF=75.0 N-5.60 kg9.80 ...

Q: In a photoelectric-effect experiment, the stopping potential is 1.37 V if the light used to illumina...

A: Part-a Given: The stopping potential Vs = 1.37 V. The wavelength of the light λ = 475 nm.

Q: An inductor with L = 2.50 mH is part of the circuit for an aviation radio beacon that operates at 10...

A: Given: An inductor of circuit L=2.50 mH Frequency, f =108 MHz      

Q: You might have had the experience of being at a red lightwhen, out of the corner of your eye, you se...

A: Absolute motion refers to the motion of an object in a stationary frame of reference. Relative motio...

Q: (a) A pendulum is set up so that its bob (a thin copper disk) swings between the poles of a permanen...

A:

Q: A photon traveling in air has a wavelength of 500 nm, and a free electron has a de Broglie wavelengt...

A: Given data: The wavelength of the photon is λ1=500 nm. The de Broglie wavelength of the free electr...

Q: Tritium (t1/2 = 12.33 y) is mostly produced for military purposes. The United States stopped produci...

A: Given: The initial amount of tritium at time t=0 is N0=75 kg Let the amount of tritium remained afte...

Q: A 24 kg child stands on a roof, 23 m above a trampoline held by firemen.  The trampoline has a stiff...

A: If resistive forces are negligible then the total mechanical energy of a system remains conserved. T...