Ultimate Physics Study Guide - Questions & Answers

9. a soap bubble is 100 nm thick and illuminated by white light incident perpendicular to its surface. what wavelength and color of visible light is most constructively reflected, assuming the same index of refraction as water?
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the nuclear force: (a) has infinite range. (b) is generally stronger than the electromagnetic force. (c) becomes infinite as the distance between particles approaches zero. (d) acts on electrons that may be inside the nucleus.
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which type of wave has a wave perpendicular to the disturbance?responses surface surface longitudinal longitudinal mechanical mechanical transverse
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how long does it take an automobile traveling in the left lane at 64.2 km/h to overtake (become even with) another car that is traveling in the right lane at 42.1 km/h, when the cars' front bumpers are initially 81.2 m apart?
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four different constant forces are exerted on a 2.0 kg object. the figure represents the magnitude and direction of each force. if the object is initially at rest, how long will it take the object to reach a speed of 2.0 m/s?
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A helium balloon (in the shape of a sphere) has radius 7.25 m .For the density of air, please use 1.29 kg/m^3, and for Helium, use .179 kg/m^3How much additional mass (payload) could this balloon lift? You should assume the balloon's skin, plus other parts of the balloon's structure have a total mass of 920 kg . Note however that this number does NOT yet include the mass of the helium filling the balloon, which you will need to account for!
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when the raindrop reaches the ground, it won't kill you or even bruise you because its terminal velocity is just 10 m/s. calculate the work done by the air resistance on the raindrop. recall that positive work done on an object/system increases the energy of that object/system. again, assume that the falling raindrop maintains its shape so that no energy is lost to the deformation of the droplet.________ Joules
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a package of mass m is released from rest at a warehouse loading dock and slides down the 2.0-m-high, frictionless chute to a waiting truck. unfortunately, the truck driver went on a break without having removed the previous package, of mass 2m, from the bottom of the chute. (figure 1)Part ASuppose the packages stick together. What is their common speed after the collision? Express your answer to two significant figures and include the appropriate units. Part BSuppose the collision between the packages is perfectly elastic. To what height does the package of mass m rebound? Express your answer to two significant figures and include the appropriate units.
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when you drive your car over a bump, the springs connecting the wheels to the car compress. your shock absorbers then damp the subsequent oscillation, keeping your car from bouncing up and down on the springs. (figure 1) shows real data for a car driven over a bump. we can model this as a damped oscillation, although this model is far from perfect. Estimate the time constant for this damped oscillation. Express your answer to two significant figures and include the appropriate units.
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A large, moving truck crashes into a small parked car. How do the magnitudes of the impulses and theforces on each vehicle compare during the collision? A. The truck experiences less force and less impulse. B. The truck experiences equal force and equal impulse. C. The truck experiences less force but more impulse. D. The truck experiences more force but less impulse.
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What is the primary classification trait used to explain how scientists divide rocks into the three classification groups?a.Compositionb.Formationc.Locationd.Texture
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20. a 0.300 kg ball is placed on a 4.00 n/m spring, displaced from its equilibrium position, and released from rest so that the system's initial mechanical energy is 0.250 j. if the system has a damping constant of 2.00 kg/s, what will be the mechanical energy of the system 0.150 s after the ball was released?
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a set of waves has a frequency of 28 hz and a speed of 7 m/s. what is the wavelength of the waves in meters?
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terference is a property of a. light waves. b. sound waves. c. water waves. d. all of these e. none of these
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two forces act on a 6 kg object; 34 n to the right and 27 n to the left. find the acceleration of the object
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jerome wants to photograph runners at a track meet. he wants his photographs to show motion. which type of setting will help emphasize a blur of motion?
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what is the minimum cross-sectional area required of a vertical steel cable from which is suspended a 280- kg chandelier? assume a safety factor of 8.0.
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a 20 n force is applied to a 0.5 kg mass at an angle of 60o above the horizontal. find the acceleration of the mass along the smooth horizontal surface.
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a 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. the bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. find the initial speed of the bullet. (please do not include units in your answer)
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what is the average metabolic rate in watts of a man who metabolizes 13,600 kj of food energy in one day? 658.9 w (b) what is the maximum amount of work in joules he can do without breaking down fat, assuming a maximum efficiency of 22.0%? (enter the maximum work he can do in one day.) j (c) compare his work output with the daily output of a 187 w (0.250-horsepower) motor. wmotor wman
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analysis of the cosmic microwave background helped us understand how energy is distributed in the universe among matter (luminous and dark) and dark energy. which is the correct model for what we observe in our universe?
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a person drives 10 km at 40 km/h and then another x km at 90 km/h. your average speed is 60 km/hr. find x
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inside a washing machine, the radius of the cylinder where the clothes sit is 0.50 m. in one of its settings the machine spins the cylinder at 2.0 revolutions per second. what is the acceleration of an item of clothing?
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let's say you see a comet's nebulous (meaning `cloudy-looking') tail stretching across the sky, and it's several million kilometers long. how big is the solid object that has developed this tail, and what's it made of?
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