. A 50-g mass is suspended by a spring attached to the ceiling, such that hen it is at rest, it is 40 cm above a table. The mass is pulled down to a eight of 25 cm, and then released at t = 0. It takes 0.4 s for the mass to avel periodically between its maximum and minimum locations. ) Sketch 2 cycles of this scenario, showing the height of the mass bove the table in terms of time. **Note: Remember to label the 5 main coordinates of each cycle, and ne equation of axis.***)

Describe a closed system with a moving boundary?

A 1.5 kg mass is attached to a 1.6 m long rigid rod of negligible mass that is anchored to the ceiling. The mass is pulled back to an initial angle of 45°and released with an initial speed of 3.0 m/s. Note: The mass is initially moving down not up! 2. L m (a) [Hint: The height of the mass above its lowest point is L(1 – cos 0).] How fast is the mass moving at the bottoms of its swing, when 0 = 0°?

1. Using Lagrangian Mechanics, find the acceleration of the double Atwood machine assuming the pulley is massless

I need the answer as soon as possible

The total consumption of electrical energy in the United States is about 1.0 1019joules per year.What is the average rate of electrical energy consumption in watts?If the population of the United States is 300 million, what is the average rate of electrical energy consumption per person?The sun transfers energy to the earth by radiation at a rate of approximately 1.0 kW per square meter of surface. If this energy could be collected and converted to electrical energy with 40 % efficiency, how great an area (in square kilometers) would be required to collect the electrical energy used by the United States?

A 0.1 m 0.3 m The pendulum shown consists of a slender rod with mass per unit length of 2.8 kg/m, and a thin plate with mass per unit area of 10.0 kg/m2. In the figure, L = 1.7 m.

70 Energy (Joule) ☎ 8 8 8 8 8 8 50 30 10 o S2FRT820 $2FRT730 AS2FRT650 S2HT940 o $2HT1150 0 -200 -150 S2FRT820 O -100 + S2HT940 A -50 0 Temperature (°C) O O S2FRT730 ... S2FRT650 $2HT1150 50 100 The figure shown corresponds to the absorbed energy of different ferritic steels in a temperature range of 1. What is the ductile-brittle transition temperature of S2FRT730 steel? 2. If a component will work at -50°C, what materials (from those shown) would you use to manufacture it? EXPLAIN YOUR ANSWER.

A 2-kW baseboard electric resistance heater in a vacant room is turned on and kept on for 15 min. The mass of the air in the room is 75 kg, and the room is tightly sealed so that no air can leak in or out. Solve for the temperature rise of air at the end of 15 min.

A body A rests on a smooth horizontal table. Two bodies of mass 2 kg and 10kg, hanging freely, are attached to A by strings which pass over smooth pulleys at the edges of the table. The two strings are taut. When the system is released from rest, it accelerates at 2m s. Find the mass of A. T&4 T, 2 kg 10 kg