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Question1
A 20 rm kg uniform door has a width of 1.2 rm m and a height of 2.5 rm m. The door is mounted on a post by a pair of hinges, marked 1 and 2, at the top and bottom of the door. An outside force of 60 rm N, at an angle of 30° above horizontal, is applied to the doorknob, as shown. The doorknob is 1.0 rm m above the bottom of the door. The x-component of the force, exerted on the door at the bottom by hinge 2, is closest to how do you resolve that? How can you describe the method?
Question2
The planet orbiting star HD187123 has a semi main axis of 0.042 A.U. If the star’s mass is 1.06 times the mass of the Sun, estimate how many times planet has orbited its star while the paper announcing it was published on December 1, 1998
If the temperature outside is a freezing -15 (celsius), and as you drive at 60 km/h, you see a police car heading towards you, How fast is the police car traveling
A series RLC circuit has components with R = 50ohms, L = 0.15H, C = 20uF. The circuit is driven by a 120-V, 60-Hz source. What is the power delivered to the circuit
Describe fusion. What role does a tokamak play in a fusion reactor? What are the advantages of nuclear power
What is the magnitude of the acceleration of the anvil. find the mass of the planet from this information.
The rms speed of a sample gas is increased by 2 %, What is the percent change in the temperature of the gas
Assume that each person is about the similar distance from the center of the field and can generate the same level of sound intensity. How numerous people are at the game.
Find out altitude of the airplane
If an organ pipe, 2 ft long and with one end closed and one end open, how long is the second organ pipe
What will be the lowest possible temperature to which very dry air at T=40 C can be cooled by evaporation. Consider p=1000mb and lv constant and equal to 2.4 x 106 J kg-1.
When only a resistor is connected across the terminals of an ac generator (117 V) that has a fixed frequency, there is a current of 0.490 A in the resistor. calculate the impedance of the series combination
The driver of an 1800 {kg} car travelling on a horizontal road at 100 kmh suddenly applies the brakes. Because of a slippery pavement, the friction of the road on the tires of the car, which is what slows down the car, is 20.0 percent of the weight o..
While sitting in physics class one day, you begin to ponder the workings of the analog clock on the classroom wall. Calculate the angular velocity of the second hand
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