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Physics
Physics
High School
94. at what angle is light inside crown glass completely polarized when reflected from water, as in a fish tank?
Physics
High School
The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10?12W/m2. Find the distance d from the car at which the sound from the stereo can still be discerned. Assume that the windows are rolled down and that each speaker actually produces 0.06 W of sound, as suggested in the last follow-up comment.Express your answer numerically in meters.
Physics
High School
what would be the height of the atmosphere if the air density were uniform and decreased linearly to zero with height assume that at sea level the air pressure is 1atm
Physics
High School
Mechanical energy is select one because the roller coaster select one energy due to friction and air resistance as it travels down the track.State True or False your answer:a. Trueb. False
Physics
High School
what can you say about the drop in potential energy (per unit mass or volume) of water traveling through either pipe?
Physics
High School
3. if the rock is projected horizontally at the same speed (2.5 m/s) from a different cliff, and it lands at a point 7.5 m from the base of the cliff, how high is the cliff?
Physics
High School
what term describes the error in refraction resulting from altered focus on an image in front of the retina due to lens thickness?
Physics
High School
gas is confined in a tank at a pressure of 10.0 atm and a temperature of 15.0oc. if half of the gas is withdrawn and the temperature is raised to 65.0oc, what is the new pressure in the tank?
Physics
High School
consider two cylindrical capacitors with the same inner conductor radius. capacitor 1 has twice the length and twice the outer conductor radius compared to capacitor 2. we apply v1 on capacitor 1 and v2 on capacitor 2 such that the amount of charges in the two capacitors are the same. which one needs to be larger, v1 or v2?
Physics
High School
Find the equivalent resistance of the circuit/find the current across 4 ohm / find the potential difference across 10 ohm
Physics
High School
What is the frequency of a 2 meter wavelength radio wave?
Physics
High School
you are using a microscope with a 10x eyepiece. what is the approximate focal length of an objective lens which will give a total magnification of 200x? assume a tube length of 160 mm.
Physics
High School
A uniform beam of length L and mass M has its lower end pivoted at P on the floor, making an angle with the floor. A horizontal cable is attached at its upper end B to a point A on a wall. A box of mass M is suspended from a rope that is attached to the beam one-fourth L from its upper end.25% Part (a) Write an expression for the y-component Py of the force exerted by the pivot on the beam.Py =25% Part (b) Write an expression for the tension T in the horizontal cable ABT =|25% Part (c) Write an expression for the x-component Px of the force exerted by the pivot on the beam, in terms of T.Px =|25% Part (d) What is the tension in the horizontal cable, in newtons, if the mass of the beam is 48 kg, the length of the beam is 8 m, and the angle is 36?T =|Please answer all the parts
Physics
High School
a hollow spherical iron shell floats almost completely submerged in water. the outer diameter is 60.0 cm, and the density of iron is 7.87 g/cm3. find the inner diameter.
Physics
College
A cannon is fired horizontally at 235 m/s off of a 61 meter tall, shear vertical cliff. How many seconds will have elapsed before the cannon ball strikes the ground? Round to the nearest hundredth.
Physics
College
which of the following would be included in a neutral posture answer: A
Physics
College
based on what you know about the moons of saturn, select all of the correct statements from the following list.
Physics
High School
Object A has a mass of 6 kg and is moving at a velocity of 5 m/s. Object B hasa mass of 4 kg and is moving at a velocity of 3 m/s. What is the Pnet of thetwo objects?
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
how much energy (in j) must the shock absorbers of a 1140 kg car dissipate in order to damp a bounce that initially has a velocity of 0.850 m/s at the equilibrium position? assume the car returns to its original vertical position.
Physics
High School
Q1 What is the velocity of the "Right" ball after the elastic collision below? Left ball heading rightwards btw.Before: Left Ball Velocity= 2.0 m/s Left Ball Mass 0.25 kg; Right Ball Velocity= 0 m/s Right Ball Mass= 0.25 kgAfter:?
Physics
High School
Weighing a Bacterium Scientists are using tiny, nanoscale cantilevers 4 micrometers long and 500 nanometers wide-essentially miniature diving boards-as a sensitive way to measure mass. The cantilevers oscillate up and down with a frequency that depends on the mass placed near the tip, and a laser beam is used to measure the frequency. A single E. coli bacterium was measured to have a mass of 710 femtograms = 7.101016 kg with this device, as the cantilever oscillated with a frequency of 17.1 MHz .Required:Treating the cantilever as an ideal, massless spring, find its effective force constant.
Physics
High School
What is the acceleration of a 1500 kg car when 3000 N of force are applied?
Physics
High School
communication satellites are placed at an altitude of about 25,000 mi above the surface of the earth. find the acceleration due to gravity at this altitude. (
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