Answer:
The remainder of the hydrogen atom's mass comes from the positively charged proton. The atomic number of an element is the number of protons in its nucleus. Neutrons are neutral particles having a mass slightly greater than that of the proton. Different isotopes of the same element contain the same number of protons but differing numbers of neutrons.
Explanation:
The object will stays the same.
Answer:
The speed of the truck must be 9.8 ft/s.
The speed of the truck must be 17 ft/s
Explanation:
First, let´s calculate the distance of the car relative to the intersection at time t = 2 s and t = 6 s:
d(t) = 1.1 t² + t +2
d(2) = 1.1 (2)² + 2 + 2 = 8.40 ft
d(6) = 1.1(6)² + 6 + 2 = 47. 6 ft
The car traveled (47.6 ft - 8.40 ft) 39.2 ft in 4 seconds.
Then, the speed of the truck must be (39.2 ft / 4 s) 9.8 ft/s to cover the same distance as the car in 4 seconds.
Now, let´s find the distance of the car to the intersection at time t = 7 and t = 7.1.
d(7) = 1.1(7)² + 7 + 2 = 62.9 ft
d(7.1) = 1.1(7.1)² + 7.1 + 2 = 64.6 ft
The distance traveled by the car in 0.1 s is ( 64.6 ft - 62.9 ft) 1.7 ft
Then the truck must travel with a velocity of (1.7 ft /0.1s) 17 ft/s to cover that distance in 0.1 s.
Answer:
Motorcycle travel 39.75 m while coming to a stop
Explanation:
We have equation of motion
v = u + at
Final velocity, v = 0 m/s, u = 15 m/s, t = 5.3 s
0 = 15 + a x 5.3
a = -2.83 m/s²
Now we have the other equation of motion
v² = u² + 2as
0² = 15² - 2 x 2.83 x s
s = 39.75 m
Motorcycle travel 39.75 m while coming to a stop
1) At the moment of being at the top, the piston will not only tend to push the penny up but will also descend at a faster rate at which the penny can reach in 'free fall', in that short distance. Therefore, at the highest point, the penny will lose contact with the piston. Therefore the correct answer is C.
2) To solve this problem we will apply the equations related to the simple harmonic movement, hence we have that the acceleration can be defined as
Where,
a = Acceleration
A = Amplitude
= Angular velocity
From a reference system in which the downward acceleration is negative due to the force of gravity we will have to
From the definition of frequency and angular velocity we have to
Therefore the maximum frequency for which the penny just barely remains in place for the full cycle is 2.5Hz