Physics, 05.07.2019 06:30 Jstylez9712
Now consider a new situation: the ball is thrown upward from the ground with an initial velocity that takes exactly the same time tba = tab = 0.45 s to pass by the window, with the ball moving up rather than down. consider the ball’s slowdown during this time: let v ′ b be the ball’s speed (do not confuse the speed with the velocity) as it passes the window’s bottom on the way up and let v ′ a be its speed as it passes the window’s top, also in its way up. how does the ball’s slowdown ∆vup = v ′ b − v ′ a compare to its speedup ∆vdown on the way down? 1. ∆vup < ∆vdown if the mass of the ball is less than 0.1 kg and ∆vup > ∆vdown if the mass of the ball is greater than 0.1 kg 2. ∆vup < ∆vdown. 3. ∆vup = ∆vdown. 4. ∆vup > ∆vdown if the mass of the ball is less than 0.1 kg and ∆vup < ∆vdown if the mass of the ball is greater than 0.1 kg
Answers: 1
Physics, 21.06.2019 13:00
You are sitting on the beach and wondering about the properties of mechanical waves. describe them in terms of ocean waves.
Answers: 3
Physics, 22.06.2019 07:10
1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?
Answers: 3
Physics, 22.06.2019 14:40
You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
Answers: 2
Physics, 22.06.2019 20:40
In addition to gravity, what is the other predominant force that affects the motion of a pendulum?
Answers: 1
Now consider a new situation: the ball is thrown upward from the ground with an initial velocity th...
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