Water has a mass per mole of 18.0 g/mol, and each water molecule (H₂O) has 10 electrons. (a) How many electrons are there in 9.06 liters of water? (1 liter is equivalent to 1.00 x 10-3 m³) (b) What is the net charge of all these electrons? (a) Number (b) Number i Units Units
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- m ↑ h₁ a Determine the speed that mass m must have so that when it reaches the height of h, it has half its original speed. All surfaces are frictionless. Show all relevant work and reasoning for credit.What is the Net Work ? Wnet = Fnetd cos θ Cart Mass, mc . 284 kg Angle, theta 49 degrees Distance, d . 75 m Suspended Mass, ms . 300 kg Velocity 1 1. 343 m/s Velocity 2 1 . 354 m/s Velocity 3 1 . 348 m/s Average Velocity 1 . 348 m/s Kinetic Energy . 258 Jcan someone answer these for me please? Thank you!
- A 1400-NN crate rests on the floor. How much work is required to move it at constant speed 5.0 mm vertically. Express your answer to two significant figures and include the appropriate units.In the figure below an object of mass m starts from rest on a roller coaster with negligible friction. A hA B hB C (a) What terms are present in the object's mechanical energy? Choose from (b) Mechanical energy is Only hc hp D O Gravitational potential energy, Spring potential energy, Kinetic energy, Work done against friction Vr= O Gravitational potential energy, Spring potential energy, Kinetic energy Spring potential energy, Kinetic energy, Work done against friction, O Gravitational potential energy, Kinetic energy D act. (c) Calculate the speed of the object at point D (vr) in terms of the following variables: (g, hhr) Write an algebraic expression; do not use numerical values. To type your equations, click the MathType popup button (red radical) in the answer box. 19 0² √O VO 10 Q ✓ Hint: To enter subscripts, press the right-facing arrow next to the superscript/exponent button. subscript because, there is (0) (BB) + E (d) What is the relationship between Vf and mass m? T CANCEL a…A box of mass 4.0 kg is accelerated from rest across a floor at a rate of 2.0 m/s^2 for 9.0 s . a.) Find the net work done on the box. Express your answer to two significant figures and include the appropriate units. W= ________
- 1] A 20kg mass hangs at rest at end of a pendulum rope. Assume that you push it up at 0.6m above initial level and keep it there. Identify forces on the mass, use work- energy theorem in 3D and find: a) How much work do you spend for this operation... If it takes 0.6 sec to bring it from "A" to "B",... b) What average power you have exerted... c) How much work do you spend for this operation... If you keep it at rest at "B" for 2 minutes, Then, you leave free. •.. d) What is its speed when it arrives at A?... B 0.6m AWhat average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit of a hill of height 305 m in 47.0 min? Note: Due to inefficiencies in converting ch energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body. HINT W Need Help? Read It Watch ItWater is lifted out of a well 20.0 mm deep by a motor rated at 1.10 hp. Assuming efficiency 85 % , how many kilograms of water can be lifted in 1 min?
- Please help me to solve this problem step by step9) A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time, answer the following. (a) How many people would it take to run a 3.00 kW electric clothes dryer? _____ people (b) How many people would it take to replace a large electric power plant that generates 800 MW? _____peopleempt=250717&cmid3D1561428&page=D13 Course dashboard If it takes 4.00 J of work to stretch a Hooke's-law spring 5.0 cm from its unstressed length, determine the extra work required to stretch it an additional 10.0 cm? E 64.00 J 32.00 J 16.00 J 8.00 J 4.00 J itfen birini seçin: