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a coin has fallen from an initial height of 5.0m. determine the coin's velocity when it is above the ground with a complete solution.
consider that we have a circuit with a potential difference of 3.2 volts with a current of 0.6 a ammeter the internal resistance of the battery at 0.5 homes use emf formula
A fan blade rotates with angular velocity given by ωz(t)= γ − β t2, where γ = 5.00 rad/s and β = 0.800 rad/s3.
a- Calculate the angular acceleration as a function of time.
b- Calculate the instantaneous angular acceleration αz at t = 3.00 s and the average angular acceleration aav-z for the time interval t=0 to t0 = 3.00 s.
How do these two quantities compare? If they are different, why are they different?
A fan blade rotates with angular velocity given by wu (t) =Y - Bt2, where Y = 5.00 rad/s and p = 0.800 rad/s3.
(a) Calculate the angular acceleration as a function of time.
(b) Calculate the instantaneous angular acceleration a z at t = 3.00 s and the average angular acceleration a avc for the time interval t = 0 to t = 3.00 s. How do these two quantities compare? If they are different, why are they different?
Data required: G = 6.67 x 10-¹¹ N m² kg-²
mass of the Earth = 6.0 x 10^24 kg radius of the Earth = 6.4 x 10^6 m gravitational field strength close to the surface of the Earth is 9.8 N kg-1 15
1.) What is the gravitational potential energy of a 60 kg student on the surface of the Earth? What then, is the minimum energy that would be required to get this student completely out of the Earth’s gravitational field?
2.) You’re in the design of mission carrying humans to the surface of the planet Mars, which has a radius of 3.38 x 106 m and a mass of 6.24 x 1023 kg. The Earth weigh of the Mar’s lander is 39,200 N. Calculate its weight and the acceleration due to Mar’s gravity at 6.0 x 106 m above the surface of Mars.
(Show the solution if it's possible, thanks)
1. A flywheel, in the form of uniform disk, is 4.0 m in diameter and weighs 637 N. What will be its angular acceleration if it is activated upon by net torque of 225J?
2. When you switch your room fan from medium to high speed, the blades accelerate at 1.2 radians per second squared for 1.5 seconds. If the initial angular speed of the fan blades is 3.0 radians per second, what is the final angular speed of the fan blades in radians per second?
(Show the solution if it's ok with you, thank you)
Radio signals from a distant planet are received at a frequency of 106 MHz on a spaceship headed directly toward the planet at a speed of 0.30c. What is the frequency of the radio signal as measured on that planet?
What physical factors are important for an athlete doing a long jump? What about the high jump?
1. Radio signals from a distant planet are received at a frequency of 106 MHz on a spaceship headed directly toward the planet at a speed of 0.30c. What is the frequency of the radio signal as measured on that planet?
Lesson: 2nd Law of Thermodynamics and Entropy
1. If you know that the change in entropy of a system where heat was added is 40 J/K, and that the temperature of the system is 200 K, what is the amount of heat added to the system?
2. If I add 30J of heat to a system so that the final temperature of the system is 26.85 °C, what is the change in entropy of the system?
3. Suppose 0.2 kg of ice at 0°C is in 0.5 kg water at 30°C. Determine the change in entropy of the ice as it melts at 0°C.
