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Physics
Physics
High School
when certain minerals containing more than one mineral recrystallize with a preferred orientation, the rock is said to exhibit a foliated texture.truefalse
Physics
High School
For the zero order reaction AB+C, initial concentration of A is 0.1M. If A=0.08M after 10 minutes, it's half-life and completion time are respectively :
Physics
High School
During a winter day, the window of a patio door with a height of 1.8 m and width of 1.0 m shows a frost line near its base. The room wall and air temperatures are 15C. (a) Explain why the window would show a frost layer at the base rather than at the top. (b) Estimate the rate of heat loss through the window due to free convection and radiation. Assume the window has a uniform temperature of oC and the emissivity of the glass surface is o.94. If the room has electric baseboard heating, estimate the corresponding daily cost of the window heat loss for a utility rate of0.18 $/kW h.
Physics
High School
what is the wavelength of the light when it is traveling in air?
Physics
High School
the quarter cylinder ab is 10 ft long. calculate magnitude, direction, and location of the resultant force of the water on ab.
Physics
High School
7) an object attached to an ideal spring executes simple harmonic motion. if you want to double its total energy, you could
Physics
High School
A ball, of mass 0.1 kg, is dropped from a height of 12 m, What is its momentum when it stikes the ground, in kg m/s?
Physics
High School
a 3-tesla magnetic field points in the positive-x direction. what is the magnitude of magnetic force on the following charged particles in units of newtons?
Physics
College
Thermal energy at room temperature is about 25 meV.You're designing an electronic device to operate at room temperature, and you want the kinetic energy associated with the uncertainty principle not to exceed the thermal energy. What's the minimum width in which your device can confine an electron?
Physics
High School
list these electron subshells in order of increasing energy 6s, 5p, 4f, 4d
Physics
High School
the volumetric current used to quantify the flow of a liquid is equal to
Physics
High School
two polarizers are oriented at 66 to one another. unpolarized light falls on them. part a what fraction of the light intensity is transmitted? express your answer using two significant figures.
Physics
High School
Which of the following option are related with the second law of thermodynamics (law of entropy)? a) the heat lost by one object must be gained by anothe robject b) heat flow naturally from the hotter body to a cooler body c) celcius degrees and Kelvin degrees is an equivalent
Physics
High School
In a certain UHF radio wave, the shortest distance between positions where the electric and magnetic fields are zero is 0.89 m. Determine the frequency of this radio wave.
Physics
High School
Substance de compones at a rate proportional to the amount of A prosent. It is found that a tb of A will reduce to 4 lb in 38 hr. Anar how long wil there be only 16 2 There will be 1 to left?
Physics
High School
a flat slab of material (nm = 2.2) is d = 0.35 m thick. a beam of light in air (na = 1) is incident on the material with an angle a = 35 degrees with respect to the surface's normal.
Physics
High School
In the circuit shown in the figure (Figure 1) both batteries have insignificant internal resistance and the idealized ammeter reads 1.30 A in the direction shown. er reads 1.30nal resistan gure 1) both Part A Find the erf of the battery. 10 AEGO ? E = Figure Submit Request Answer 1 of 1 Part B Is the polarity shown correct? 12.0 12 WW + 8=? yes 48. 03 no 75.0 VT 3 15.0 25 T?
Physics
High School
A solid sphere and a hollow sphere, both uniform and having the same mass and radius, roll without slipping toward a hill with the same forward speed V. Which sphere will roll farther up the hill?
Physics
College
817 cm3 at 80.8 kPa to 101.3 kPa
Physics
High School
a 45.00 ml 0.200 m hclo4 solution is titrated with 0.363 m naoh. what is the ph after the addition of 10.7 ml of naoh?
Physics
High School
A small jet airplane has a total wing area of 67.5 m2 and a mass of 7.03 104 kg.(a) If this jet is in horizontal flight, determine the pressure difference between the lower and upper surfaces of the wings.Pa(b) When the speed of air traveling over the wing is 247 m/s, determine the speed of air under the wing. Use 1.29 kg/m3 as the density of air.m/s(c) Why do all aircraft have a maximum operational altitude?The density of air increases with higher altitude, which decreases the pressure difference until it cannot support the aircraft.The density of air decreases with higher altitude, which decreases the pressure difference until it cannot support the aircraft. The density of air decreases with higher altitude, which increases the pressure difference until it cannot support the aircraft.The density of air increases with higher altitude, which increases the pressure difference until it cannot support the aircraft.
Physics
High School
explain why if a runner completes a 6.2 mi race in 32 min, then he must have been running at exactly 11 mi/hr
Physics
High School
the body's electrochemical communication circuitry is known as the
Physics
High School
A block is placed on a plane whose angle of inclination is 30. The coefficients of static and kinetic friction for the block on the inclined plane are both 0.2. The block (A) remains stationary on the inclined plane. (B) accelerates down the inclined plane. (C) travels down the inclined plane at constant velocity. (D) travels up the inclined plane at constant velocity. (E) accelerates up the inclined plane. ***This question was already answered and they say it remains stationary but I am getting it would accelerate down the inclined plane. Please provide all work. I get fsmax = u mg cos 30 = (.2)*(.866) & Fapp= mgsin30 = (.5) [Removed m and g since same]. Fapp is .5 which is greater than fsmax .1732 so block would accelerate down plane.
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