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The density of nitrogen at S.T.P is1.251kgm^-3. calculate the r.m.s. velocity of nitrogen molecules.
Air at 5 atm is compressed to half of its original volume. Find the resulting pressure of the air.
find (a) magnitude of the electric field 0.5m from a 2.5 -μC point charge and (b) the magnitude and direction of the electrostatic force acting on an electron placed at that point.
Calculate the power delivered to each of the resistors shown in Figure below.
An L-R-C series circuit is constructed using 175 resistor, a 12.5 capacitor, and 8.00-mH inductor, all connected across an ac source having a variable frequency and voltage amplitude of 25.0 V.
At what angular frequency will the impedance be smallest, and what is the amplitude at this frequency?
At the angular frequency in part (a), what is the maximum current through the inductor?
At the angular frequency in part (a), find the potential difference across the ac source, the resistor, the capacitor, and the inductor at the instant that the current is equal to one-half inductor it greatest positive value
In part (c), how are the potential difference across the resistor, inductor and capacitor related to the potential difference across the source.
A current in a conductor produces a magnetic field that can be calculated using the Biot – Savart law. Because cur- rent is defined as the rate of flow of charge, what can you conclude about the magnetic field produced by stationary charges? What about that produced by moving charges?
Describe the change in the magnetic field in the interior of a solenoid carrying a steady current I (a) if the length of the solenoid is doubled but the number of turns remains the same and (b) if the number of turns is doubled but the length remains the same.
Two spherical objects have masses of 3.1 x 105 kg and 6.5 x 103 kg. The gravitational attraction between them is 65 N. How far apart are their centers?
Calculate the temperature at which root mean square speed of a gas molecules is double of its speed at 27°C pressure remaining constant
A flat coil with 78 loops of wire has a radius of 15 mm. The coil is placed in a magnetic field of 0.35 T so that a maximum flux goes through it. It is later rotated in 0.07 s to a position so that no flux can go through. What is the average induced EMF produced between the terminals of the coil?
Consider a spacecraft moving at 0.95c travelling past an observer on Earth. The said observer and the occupant of the ship each start identical alarm clocks set to ring after 15 hours. With respect to the observer on Earth, at what time will the Earth clock read when the spacecraft clock rings?
A cook uses a microwave oven to heat a meal. The radiation wavelength is 9.25 cm. What is the energy of one photon of this microwave radiation?
