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An 18-year-old runner can complete a 10.0-km course with an average speed of 4.80 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.83 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time as the older runner?
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
Ignoring the container and the equilibrium vapor pressure of the liquid at 51.5 °C, find out the ratio of the mass of steam to the mass of ice. The specific heat capacity of steam is 2020 J/(kg C°).
A generator is connected to a resistor and a 0.032-H inductor in series. Determine the resistance of the resistor in this circuit
What is the concentration of the Cd in the soil if the city of Des Moines adds 3 tons of compost/ acre-6 inches given the compost contains 50 ppm Cd
A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. What is the frequency o the sound emitted by the horn
A certain spring is found not to obey Hooke's law; it exerts a restoring force Fx(x)=??x??x2 if it is stretched or compressed, Calculate the potential energy function U(x) for this spring. Let U=0 when x=0
A 1.7m -long barbell has a 21kg weight on its left end and a 32kg weight on its right end. What is the torque due to gravity about the left end of the bar
A beam of 6 MeV alpha particles scatters from a thin gold foil. What is the ratio of the number of alpha particles scattered to angles greater than 1° to the number scattered to angles greater than 3°
When a 24 Ohm resisotr is connected across a 12 Volt Battery, a current of 482 ma flows. What is the power delivered by the emf of the battery
The intensity of sunlight striking Earth's upper atmosphere (called the solar constant) is 1.35 kW/m2. Find the radiation pressure at the surface of the sun
A series RLC circuit has a resistance of 10 ? and an impedance of 80 ?. If the rms voltage applied to the circuit is 170 V, what average power is delivered to the circuit
On December 3 at 11 pm you look toward the eastern horizon and see the bright star Procyon rising. At approximately what time would Procyon rise one week later, on December 9.
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