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A small mirror is attached to a vertical wall, and it hangs adistance of 1.56 m above the floor. The mirror is facing due east,and a ray of sunlight strikes the mirror early in the morning and then again later in the morning. The incident and reflected rayslie in a plane that is perpendicular to both the wall and the floor. Early in the morning, the reflected ray strikes the floor ata distance of 3.35 m from the base of the wall. Later on in the morning, the ray is observed to strike the floor at a distance of1.27 m from the wall. The earth rotates at a rate of 15.0° perhour. How much time (in hours) has elapsed between the two observations?
A baseball player decides to keep going past second base and try for third base. If the player comes to rest at third base, how much work was done on the player by friction
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 1.84 cm. what mass of ethanol diffuses through the cylinder
A tank having a volume of 0.11 m3 contains helium gas at 170 atm. How many balloons can the tank completely fill
Capacitors C1 = 6.10 µF and C2 = 2.95 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
A 1.80Kg brick is sliding next to on a rough horizontal surface at 13.5m/s .If the brick stops in 4.80, how much mechanical energy is lost.
A rigid tank contains 1.30 moles of an ideal gas. Determine the number of moles of gas that should be withdrawn from the tank to lower the pressure of the gas from 24.5 atm to 4.40 atm. Assume volume of the tank and the temperature of the gas rema..
A stone thrown vertically upward with a velocity of 14.3 m/sfrom edge of a cliff 79m high. From its highest point it then fallsall the way to the base of the cliff.
An airplane flying at a constant speed of 160 m/s pulls out ofa dive in a circular arc. What is the radius of the arc
A mass on a string of unknown length oscillates as a pendulum with a period of 6 s. What is the period in the following situations, determine The mass is doubled
A container X has 2 moles of gas with a pressure of 120 KPa at a constant temperature of 300K. 1) Find the volume of the gas in the container X. 2) If the temperature is now increased to 450K, what is the new pressure of the gas in the container X.
Suppose you have a 9.00V battery, a 2.00 micro-Farad capacitor, and a 7.40 micro-Farad capacitor, find the charge and energy stored if the capacitors are connected to the battery in series
Use Newton law to determine the force applied to the backrest when a 150-lb person leans 40% of his or her body weight against it. Determine the constant requiered for the spring
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