It traveled 200 m in 50 seconds. 200/50 can be simplified to 4 m/s!
The velocity is -4 m/s (negative because it travelled from 100 to -100 or backwards)
Answer:
Sound is produced by an object vibrating and creating a pressure wave.
Explanation:
The baseball will undergo 16 revolutions on its way to home plate.
Explanation:
As the parameters which are given are speed at which the baseball is thrown, (v = 90 mi/h) and the distance between the home plate and the ball thrown is 60 ft. Also the spin is said to 1950 rev/min, it indicates that the ball will undergo 1950 revolution in every single minute. So in order to determine the number of revolutions the baseball will make in its way to home plate, we have to first determine the time taken for the baseball to reach its home plate with the given speed.
As we know that speed can be obtained by the ratio of distance with time, in the present case, we know the speed and distance, then time can be obtained by ratio of distance with speed.
At first, we have to convert the speed from mi/h to ft/min
1 mi/hr = 5280/ 60 ft/min = 88 ft/min.
Then, Time = Distance/Speed = 60/(90×80)=60/7200=8.33 × 10⁻³ min
Since the ball undergoes 1950 revolutions in 1 min, then in 8.33 × 10⁻³ min, the number of revolutions will be 1950×8.33 × 10⁻³ = 16 rev
Thus, the baseball will undergo 16 revolutions on its way to home plate.
0 m.s because once it came to the ground it’s stopped
Answer:
40.4 kJ
Explanation:
The gas in this problem is in a sealed tank: this means that its volume is constant, so we can use the pressure law, which states that for an ideal gas kept at constant volume, the pressure is proportional to the temperature of the gas.
Mathematically:
where, in this problem:
is the initial pressure of the gas
is the final pressure
is the initial temperature
is the final temperature
Solving for T2,
Now we can find the change in internal energy of the gas, which is given by:
where:
n = 30 mol is the number of moles
R = 8.314 J/(mol • K) is the gas constant
And substituting the values of the initial and final temperatures, we get: