Physics

in a radio telescope, the role that the mirror plays in visible-light telescopes is played by: a. a spectrometer b. an interferometer c. a special kind of lens d. computer software e. a large metal dish (antenna)
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Bob travels 60km north turns around and travels 20km south what is his total distance travelled? what is his displacement
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the north pole of a bar magnet is moved close to the north pole of another bar magnet that is suspended by a thread. how does the energy stored in the magnetic field change?
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a metal object is suspended from a spring scale. the scale reads 920 n when the object is suspended in air, and 750 n when the object is completely submerged in water. a. draw a diagram showing the three forces acting on the submerged object. b. find the volume of the object. c. find the density of the metal.
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we see two stars separated by one degree on the celestial sphere. what can we infer about these stars?
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a 4.4 hz continuous wave travels on a slinky. if the wavelength is 0.55 m, what is the speed of waves on the slinky (in m/s)? m/s
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a bike and rider, 82.0 kg combined mass, are traveling at 4.2 m/s. a constant force of -140 n is applied by the brakes in stopping the bike. what braking distance is needed?
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10. if both elements of the water heater in this residence are energized at the same time, how much current will they draw? (assume that each element is rated at 240 volts at 4500 watts.)
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a 13-kg k g hammer strikes a nail at a velocity of 7.8 m/s m / s and comes to rest in a time interval of 8.4 ms m s . part a what is the impulse given to the nail?
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if you stand 8 m in front of a plane mirror and focus a camera on yourself, for what distance is the camera now focused?
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Calculate the number of moles in 6g of c
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an aluminum bar 3.78 m long has a rectangular cross section 1.18 cm by 5.23 cm . part a what is its resistance?
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a gun is fired with muzzle velocity 1000 feet per second at a target 4050 feet away. find the minimum angle of elevation necessary to hit the target.
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the air in an organ pipe is replaced by helium (which has a lower molar mass than air) at the same temperature. how does this affect the normal-mode wavelengths of the pipe?
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how does the conservation of angular momentum explain the increased speed of a planet in its orbit at perihelion? quizley
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the centripetal force in a collapsing cloud of gas and dust is strongest at the poles question 9 options: true false
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if you had a microscope which was capable of doing this, what would the frequency of electromagnetic radiation be, in hertz, that you would have to use?
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Drag and drop the terms to correctly complete the prompt.Current is produced in a conductor when it is moved through aapplying a force on thein the conductor and causing them toof generating current in a conductor by placing the conductor in a changing magnetic field is calledis nobecause the magnetic lines of force are:: physical connectionbetween the conductor and the magnet. The current is said to be induced in the conductor by themagnetic field. The conductor, which is often a piece of wire, must beto the magnetic lines of force inorder to produce the maximum force on the free electrons. The direction that the induced current flows is determined by the directionof the lines of force and by the direction the wire is moving in the field.This process:: free electrons :: induction :: perpendicular :: moveThere::magnetic field
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how fast is it moving when it reaches the top of its trajectory if the projectile is fired at a speed of 138 and an upward angle of 65 degrees?
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what is the relationship between index of refraction and the speed of the light in the medium of the index of refraction?
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A mass is tied to a string and swung in a horizontal circle w a constant angular speed. Speed is doubled. What happens to the tension in the string?
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1 Suppose the displacement of particle P from origin at time t is given by x(t)=t-6t find the average velocity and acceleration of p over the time interval 1
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which term defines the distance from rest to crest, or from rest to trough?responsesamplitudeamplitudefrequencyfrequencyperiodperiodspeed
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If a 9 V battery is connect to a 4 ohm resistor, what is the current?O2.3 AO 36 AO 0.44 A5 A
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