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A 40.0 cm -diameter cylinder of helium gas is 50.0cm long and at 30.0 C. The pressure gauge reads 120 psi. How many helium atoms are in the cylinder? What is the mass of the helium? What is the helium number density? What is the helium mass density?
q1. the density of gold is 1.93times104 rmkgmrm3. 203 rm g of gold is shaped into a cube. what is the length of each
A proton (1e) and an alpha particle charge = 2e, mass = 6.64 x10^-27 kg are initially at rest, separated by 4.00 x 10^-15 m. Find the speeds of the proton and alpha particle
A highway has an unbanked curve with a radius of 100m. An engineer suggest banking the curve so that it is safer in icy weather. How does banking the curve make it safer
What is the resistance of a lightbulb that uses an average power of 55.0 W when connected to a 60.0 Hz power source having a maximum voltage of 180 V
A bowling ball (mass = 7.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.36 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
A forward horizontal force of 12N is used to pull a 240N crate at constant velocity across a horizontal floor. What is the coefficient of friction
Mutual induction can be used as the basis for a metal detector. A typical setup uses two large coils that are parallel to each other , find the new value of the induced emf
73 magnetic target is suspended on a string. A .025magnetic dart, shot horizontally, stickes the target head-on. the dart and the target together, acting like apendulum, swing 12 cm above the initial level before instantaneously coming to a rest...
While a person is walking, his arms swing through approximately a 45.0^\circ angle in 0.520s. What is the acceleration of a 1.60 gram drop of blood in the fingertips at the bottom of the swing
Two identical guitar strings are prepared such that they have the same length (2.04 m) and are under the same amount of tension. What is the wave propagation speed on the guitar strings
An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6×10?8s when at rest. Find the average distance traveled by the pion as measured by the same observer
A projectile is red with an initial speed of 65:2 m/s at an angle of 34.5 degrees above the horizontal on a long at ring range. Determine The total horizontal distance covered
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