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Consider a universe where the matter density is 0, and it has a significant cosmological constant lambda. Assume the curvature, k, is 0. a. Solve the Friedmann equation to get the scale factor as a function of time. b. How old is the universe in this case? c. Calculate the value of the deceleration parameter, q0, from your answer in part a.
A plate of glass with parallel faces having a refractive index of 1.57 is resting on the surface of water in tank. A ray of light coming from above in air makes an angle of incidence 34.5 degrees with normal to the top surface of the glass.
It takes 150 minutes for a middle-aged physics professor to ride his bicycle up the road to Alpe d'Huez in France. What is the bicyclist's average power output
The distance to the moon can be found with the help of mirrors left on the moon by astronauts. calculate the distance from the earth to the moon
a 2 kg block travels around a 0.5m radius circle with an angular speed of 12 rad/s. what is the resulting torque
75-kg person stands on a 6.0-m-long 47-kg ladder. The ladder is tilted 60° above the horizontal. The coefficient of friction between the floor and the ladder is 0.42. The coefficient of friction between the wall and the ladder is zero.What dis..
An 18 g rifle bullet travelling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of pendulum's displacement.
A 7.05-kg ball of clay is thrown downward from a height of 4.08m/s onto a spring with k=1600 N/m. Find the total work done on the clay during the spring's compression
Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Describe why each drug could be fatal to a cell.
Light of wavelength 589 nm is incident on a single slit that is 0.720mm wide, and the resulting diffraction pattern is observed on a screen 2.00m away. What is the distance between the two dark fringes on either side of the central bright fringe
Heat is extracted from a certain quantity of steam at 100 degrees celsius. Thus the steam changes into ice at 0 degrees celsius. If this energy were used to accelerate the ice from rest, what would be the linear speed of the ice.
A sample of helium behaves as an ideal gas as it is heated atconstant pressure from 273 K to 343 K. what is the mass of helium present
an object of mass 1.00kg travels at 5.0m/s and enters a region of ice where the coefficient of friction is 0.10. determine the distance traveled before coming to a hault
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