Daily Physics Puzzles & Riddles - Challenge Yourself!

A resistor with resistance R1 and a resistor with resistance R2 are connected in parallel to an ideal battery with emf . The rate of thermal energy generation in the resistor with resistance R1 is:
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Hubble's law says that Group of answer choices more massive galaxies rotate faster the more distant a galaxy is, the faster it appears to be receding from us. the larger a galaxy is, the faster is receding from us.
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Kirchoffs laws question Can someone please explain to me how to do this question. Answer is C. Thank you in advance :)
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When discussing stellar lives, astronomers divide stars by mass into low-mass, intermediate-mass, and high-mass stars. Which category has the longest lifetimes
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Two lenses, the first with focal length -12.5 cm and the second with focal length 20.0 cm, are separated by 15.0 cm. If an object is place 50.0 cm in front of the first lens, what is the total magnification
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A circular saw blade 0.200 m in diameter starts from rest. In 6.00 s it accelerates with constant angular acceleration to an angular ve- locity of 140 rad>s. Find the angular acceleration and the angle through which the blade has turned.
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A rope of negligible mass is stretched horizontally between two supports that are 8.74 m apart. When an object of weight 2380 N is hung at the center of the rope, the rope is observed to sag by 37.1 cm. What is the tension in the rope
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A rod of length L and total charge Q is a distance D from a point charge q which lies along the perpendicular bisector of the rod. Find the force of the rod on the point charge.
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An object is launched horizontally off a 30 m high building so that it lands 121 m away from its initial location. Do you need to know the mass of the projectile to find the initial velocity of the projectile
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A thick copper wire connected to a voltmeter surrounds a region of time-varying magnetic flux, and the voltmeter reads 7 volts. If instead of a single wire we use a coil of thick copper wire containing 22 turns, what does the voltmeter read
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If the maximum distance it will be able to stretch when it replaces the aorta in the damaged heart is 1.70 cmcm , what is the greatest force it will be able to exert there
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2. How much energy is needed to convert 0.005 kg of ice at 10 C to 0.005 kg of water at 35 C? The specific heat of ice is ci = 2090 J/(kgC), the latent heat of fusion of water is Lf = 3.33 105J/kg, and the specific heat of water is cw = 4186 J/(kgC).
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A piano string of mass per unit length 0.0023 kg/m is under a tension of 592 N. Find the speed with which a wave travels on this string. Answer in units of m/
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Light from an argon laser strikes a diffraction grating that has 5310 groves per centimeter. The central and 1st order principal maxima are separated by 0.488 m on a wall 1.72 m from the grating. Determine the wavelength of laser light.
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. Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone is moved between the speakers along the line joining the two speakers with a constant speed of 1.60 m/s. What beat frequency is observed
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Two charges one positive and one negative both with a charge of 1.1X10-10 C. They are 10-6 m apart. A third charge which is positive is located half between the first 2 charges, and the third charge is 10-17 C. What is the magnitude of force on the third charge
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In a certain UHF radio wave, the shortest distance between positions at which the electric and magnetic fields are zero is 0.317 m. Determine the frequency of this UHF radio wave.
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You have 2 people on your team and you know your team's velocity is 0.6. How many person-days of productive work can you get done in 10 days?
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Under natural conditions, the amount of heat energy absorbed by the Earth as short-wave radiation is balanced by the sum of reflected radiation and absorbed radiation emitted as
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Describe what must happen inside of an aluminum can in order for it to be attracted to a positively-charged and to a negatively-charged object.
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The man's body will increase by a factor of 10 in each dimension. What will be his new mass?Express your answer using two significant figures.
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BRAINLIEST AND 100 POINTS What are some of the challenges for manned space exploration associated with the differences in gravity?Select all correct answers. 1. Cardiovascular deterioration2. Dementia3. Bone deterioration4. Muscle deterioration
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BRAINLIEST AND 100 POINTSWhat are some of the challenges for manned space exploration associated with isolation and confinement?Select all correct answers. 1. Health issues2. Behavorial issues3. Sleep loss4. Hallucinations
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BRAINLIEST AND 100 POINTSWhat are some of the challenges for manned space exploration associated with radiation?Select all correct answers. 1. Reduced motor function2. Increased risk of cancer3. Damage to the central nervous 4. Open sores and lesion on exposed skin
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