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Physics
Physics
High School
what is the magnetic field amplitude b0 of an electromagnetic wave that has an electric field amplitude e0 of 0.365 v/m ?
Physics
High School
What is the frequency of wavelength 500 m?
Physics
High School
The planet Earth orbits around the Sun and also spins on its own axis.a) Calculate the angular momentum, in kilogram meters squared per second, of the Earth in its orbit around the Sun.b) Calculate the angular momentum, in kilogram meters squared per second, of the Earth spining on its axis.c) How many times larger is the angular momentum of the Earth in its orbit than the angular momentum of theEarth spinning on its axis?
Physics
College
Due to the wave nature of light, light shined on a single slit will produce a diffraction pattern. Green light (525 nm) is shined on a slit with width 0.415 mm.(a) Find the width of the central maximum located 1.65 m from the slit.(b) What is the width of the first order fringe?
Physics
High School
a golf ball leaves the ground at a speed of 4.5 m/s and at an angle of 66.02 above the horizontal. what are the maximum height and flight time of the ball?
Physics
High School
a uniform, aluminum beam 9.00 m long, weighting 300 n, rests symmetrically on two supports 5.00 m apart. a boy weighing 600 n starts at point a and walks toward the right.
Physics
High School
The wavelength of blue light is greater than red light and its energy is greater. (True or False)
Physics
High School
an object has an acceleration of 15.7 m/s/s. if the mass of the object is increased by a factor of 13.6, what would be the new acceleration of the object?
Physics
High School
what is the change in potential energy of an energetic 64 kgkg hiker who makes it from the floor of death valley to the top of mt. whitney?
Physics
College
What is Hubble's law?A) The longer the time period between peaks in brightness, the greater the luminosity of the Cepheid variable star.B) The recession velocity of a galaxy is directly proportional to its distance from us.C) The recession velocity of a galaxy is inversely proportional to its distance from us.D) The faster a spiral galaxy's rotation speed, the more luminous it is.E) The faster a spiral galaxy's rotation speed, the less luminous it is.
Physics
High School
what best describes the sum of all forces acting on an object
Physics
High School
A ball is hit straight up with an initial speed of 28 meters per second. What is the speed of the ball 2. 2 seconds after it is hit?.
Physics
High School
a skipper on a boat notices wave crests passing the anchor chain every 5 seconds. the skipper estimates the distance between crests is 15 m. what is the speed of the water waves? a. 3 m/s b. 5 m/s c. 15 m/s d. 45 m/s
Physics
High School
Which method of measuring distances would you use if you wanted to measure the distance to stars in a nearby galaxy?
Physics
College
5. An automobile with a mass of 1000 kilograms accelerates when the traffic light turns green. If thenet force on the car is 4000 Newtons, what is the car's acceleration?
Physics
High School
The Hertzsprung-Russell diagram plotsstars according to what three stellarproperties?
Physics
High School
Secret materials may be transmitted y the same methods as Confidential materials.
Physics
High School
there are four stages of sintering. beginning with point contact and followed by the initial diffusion stage, what are the two final stages of the process?
Physics
High School
ncreasing the plate area of a capacitor increases the capacitance. group of answer choices true false
Physics
High School
a single slit of widthis illuminated by asodium yellow light of wavelength 589 nm. findthe intensity at aangle to the axis in termsof the intensity of the central maximum.
Physics
High School
A train is approaching you at very high speed as you stand next to the tracks. Just as an observer on the train passes you, you both begin to play the same Beethoven symphony on portable compact disc players. (a) According to you, whose CD player finishes the symphony first? (b) What If? According to the observer on the train, whose CD player finishes the symphony first? (c) Whose CD player really finishes the symphony first?
Physics
High School
When a nucleus of 235U undergoes fission, it breaks into two smaller, more tightly bound fragments. Calculate the binding energy per nucleon for 235U and for the fission product 137Cs .
Physics
High School
a cylinder with a movable piston contains gas at a temperature of 27oc, a volume of 1.5 m3, and an absolute pressure of 0.20 x 105 pa. what will be its final temperature if the gas is compressed to 0.70 m3 and the absolute pressure increases to 0.80 x 105 pa?
Physics
High School
what is the total net force of 10n, 9n and 16n?
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