A 22-cm-diameter cylinder that is 43 cm long contains 44 g of oxygen gas at 20∘C
What is the reading of a pressure gauge attached to the tank?
In: Physics
(1) An air track that is 2 meters long is raised by 2 cm on one end. What vertical distance does an air cart move if the air cart moves from the 1 meter mark to the 2 meter mark? 1 cm
(2) If the above air cart starts from rest, what would you expect its velocity to be 0.5 meters along the air track? Use the equations of conservation of energy. Assume the air track is frictionless.
(3) Is the result of Question (2) consistent with what you would expect based on the equations of kinematics? Solve for the expected velocity based on the equations of kinematics and compare.
In: Physics
During a fireworks display, a shell is shot into the air with an initial speed of 91.55 m/s at an angle of theta degrees above the horizontal. The fuse is timed to 8.21 seconds for the shell just as it reaches its highest point above the ground. If the horizontal displacement of the shell is 149.68 meters when it explodes, what is the height (in unit of meters) when the shell explodes?
You must use g = 9.8 m/s2.
In: Physics
46. a) Explain why a pattern of bright and dark
fringes is visible on a screen when a light is
shone through a double slit.
b) Upon using Thomas Young’s double-slit experiment to
obtain measurements, the
following data were obtained. Use these data to
determine the wavelength of light
being used to create the interference pattern. Do this
in three different ways.
• The angle to the eighth maximum is 1.12°.
• The distance from the slits to the screen is 302
cm.
• The distance from the first minimum to the fifth
minimum is 2.95 cm.
In: Physics
45. Perform the necessary research to identify three
examples of industrial applications that relate in some way to
the interference of light waves. For each example, describe a
related job or career.
In: Physics
When can and can't we use the equation the equation ΔX=v^2sin(2θ)/g to find the horizontal displacement in projectile motion problems?
In: Physics
In: Physics
Explain, from a fundamental physical standpoint, why lasers use three-state or four-state systems, versus two states. Be specific
In: Physics
The trajectory of a rock ejected from the Kilauea volcano, with a velocity of magnitude 46.9 m/s and at angle 35.1 degrees above the horizontal. The rock strikes the side of the volcano at an altitude of 39.1m lower than its starting point. Calculate the magnitude of the rock’s velocity at impact? Use g = 9.8 m/s2.
In: Physics
A girl of mass, m = 40 kg has osteoporosis which weakens her bones. From a kneeling position, she topples forward onto her elbows with her upper arms extended vertically downwards on impact with the ground. In falling forward, her centre of mass lowers by a height, h = 50 cm and she absorbs all of her kinetic energy from her fall into her two humerus bones (one bone in each upper arm).
Determine an equation for the stress in each humerus bone, ?, in terms of m, h, the acceleration due to gravity, g, Young’s modulus for bone, Y, the cross sectional area of each humerus bone, A and the length of each humerus bone, l. State any laws used. Now, determine the minimum rupture strength required for the girl’s humerus bones such that she doesn’t break them, given in units of N/m2 . Take l = 20 cm, A = 3.0 cm2 and Y = 1.4 x10^10 N/m2 .
In: Physics
What is limiting the more widespread use of hydrogen as a transportation fuel?
|
Hydrogen fuel is only suitable for compact vehicles |
||
|
A new infrastructure would be needed for fuel production and distribution |
||
|
The technology for reducing the emissions of hydrogen-fueled vehicles is expensive |
||
|
Fears of the public that cars would become hydrogen bombs |
In: Physics
Photons with a wavelength of 599 nm in air enter a plate of flint glass with index of refraction n = 1.66. Find the speed, wavelength, and energy of a photon in the glass. (a) speed (in m/s) m/s (b) wavelength (in m) m (c) energy (in J)
In: Physics
A hot air balloon has a total mass of 750 kg (not including the air in the balloon) and holds a volume of 2.8 x 10^6 L of air. Assume the density of the air outside the balloon to be 1.2 kg/m^3 at a temperature of 20 degrees C and the air pressure is 101.3 kPa inside and outside the balloon. What is the minimum temperature for the air in the balloon to allow for the balloon to float? You can assume the air in the balloon to be an ideal gas and you must consider the mass of the air in the balloon as part of the total mass. Also, assume the molar mass of air to be 29 g/mol. (The answer is 379 K. Please show work.)
In: Physics
In a rectangular coordinate system, a positive point charge 5.0nC is placed at x=2cm, y=0cm and a negative point charge -5.0nC is placed at x=-2cm,y=0cm. Point P is at x=2cm, y=3cm
K=8.99 x 10^9 (Nxm^2)/C^2
a) Calculate the magnitude of the force between the positive charge and negative charge
b) Draw the electric field vector at point P, caused by the positive charge. Find its magnitude
c) Draw the electric field vector at point P, caused by the negative charge. Find its magnitude
d) Determine the magnitude and direction of the net electric field vector at point P
e) If a charge q=-4.0nC with a mass 2.0 x 10^-6 kg is released from rest at point P, what is its acceleration?
f) Calculate the electric potential at point P
In: Physics