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Physics
Physics
High School
refer to question 12 on page 6/7: a type ii cepheid has an apparent magnitude of 12 and a pulsation period of 3 days. what is the approximate distance to this cepheid variable star?
Physics
High School
i need to know 2 types of matter and descriptions of them
Physics
College
if the angle opf elevation of the cannon is decreased from 35 degrees to 30 degrees, the ertical compent of the balls iontial veclotiy will
Physics
High School
when the displacement of a mass on a spring is 1212 aa , what percentage of the energy is kinetic energy?
Physics
College
PLEASE HELPWhich is not a characteristic of a reflecting optical telescope?A) The mirrors inside the telescope do not need to be cleaned often.B) They are easier and cheaper to create.C) There is minimal distortion of the image.D) The mirrors occasionally tend to get foggy.
Physics
College
If there is no external force on a moving object, it willA stop moving.B.keep moving with constant velocity.C.gradually slow down until it stops.D.gradually speed up.E.maintain the same state of motion.
Physics
High School
using a cable with a tension of 1470 n, a tow truck pulls a car 5.00 km along a horizontal roadway. part a how much work does the cable do on the car if it pulls horizontally? express your answer with the appropriate units.
Physics
High School
anderson video - ampere's law 2 of 5 review | constants first, launch the video ampere's law. after watching the video, answer the follow-up question below. select to launch video part a a solenoid has 15 turns per centimeter of its length. the solenoid is twisted into a circle so that it becomes shaped like a toroid. what is the magnetic field at the center of each turn of the toroid? the current is 57 ma.
Physics
High School
What is the wave speed if the wavelength is 5 meters and the frequency is 4 Hz?
Physics
High School
in a binary-star system that produces a nova, the white dwarf pulls matter from the companion star. the matter forms an accretion disk that orbits the white dwarf. then a specific sequence of events must take place for a nova event to occur.a. Material accumulates onto white dwarf's surface increasing in temperature and density b. Nuclear fusion reactions cause the an enormous but temporary increase in luminosity c. At a temperature of 10 million K, the accumulated surface hydrogen begins nuclear fusion d. As nuclear fuel is burned up or blown into space, fusion ceases and the star dims 1. first step2. last step
Physics
High School
finally, remind yourself the properties of light from the first lecture and qs1. if instead of pulses, the astronaut had sent a continuous beam of green light. how would that light appear to those on the spaceship?
Physics
High School
When a spring is stretched by 2cm It stores 100 J of energy?
Physics
High School
an airplane traveling at half the speed of sound emits a sound of frequency 4.90 khz. (a) at what frequency does a stationary listener hear the sound as the plane approaches? khz
Physics
High School
When light shines on a sample, each element emits specific wavelengths producing a unique fingerprint called its ______ spectra.
Physics
High School
Deep surveys of the universe indicate that the largest structures in space are no larger than about 50 mpc in size.t/f
Physics
High School
A 2. 0 kg body is initially traveling at a velocity of 40 m/s east. If a constant force of 10 n due east is applied to the body for 5. 0 s, the final speed of the body is.
Physics
High School
an object of mass m is rotating about a fixed axis with angular momentum l. its moment of inertia about this axis is i. what is its kinetic energy?
Physics
High School
a plank having mass 6.6 kg rides on top of two identical solid cylindrical rollers each having radius 4.6 cm and mass 1.9 kg. the plank is pulled by a constant horizontal force 6 n applied to its end and perpendicular to the axes of the cylinders (which are parallel). the cylinders roll without slipping on a flat surface. there is also no slipping between cylinders and plank. m r m r f m find the acceleration of the plank. answer in units of m/s 2 .
Physics
High School
which of these stars will take the shortest time to go from the earliest protostar stage to the main sequence?
Physics
High School
What is the wavelength of a Colour of frequency 4 x 10 14 Hz in a medium of refractive index 1.5 *?
Physics
High School
A wheel 31 cm in diameter accelerates uniformly from 240 rpm to 360 rpm in 6. 8 s. How far will a point on the edge of the wheel have traveled in this time?.
Physics
High School
a loop antenna with loop radius of 0.4 m is made of copper wire of radius 4 mm. if the loop radiates at 6 mhz and carries a current of 50 a, find (a) the radiation resistance of the loop (b) the power radiated
Physics
College
here's the answer for everyone :)
Physics
High School
Since the beginning of time some people have believe that the earth is flat beginning around 300 BC however some began to wonder if the earth is actually spherical in shape
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