Answer:
Explanation:
given,
mass of the cart 1, m₁ = 310 g
speed of car 1 , v₁ = 1.25 m/s
mass of cart 2, m₂ = 260 g
speed of cart 2, v₂ = -1.33 m/s
speed of center of mass
Hence, speed of center of mass of the system is equal to 0.0732 m/s
Answer:
C
Explanation:
The order is this: Displacement --> Velocity --> Acceleration. The velocity directly affects the displacement and the acceleration directly affects the velocity. (changing the acceleration changes the velocity which also changes the displacement).
To go forward in our order, find the slope of the curve/line. To go backwards, find the area under the curve/line. In this case, we are trying to find the displacement of the object, so we should find the area of a velocity-time graph.
Answer:
2. Body vibrations caused by blood pumped from the heart.
Explanation:
From the passage, it can be deduced that the heartbeat detector senses the tiny vibrations caused by blood pumped from the heart.
The prisoner asked the guard, "How did you know I was here?"
The guard responded,
"The heartbeat detector,"
Answer:
The mass of the string and new frequency are 20.78 g and 40.0 Hz.
Explanation:
Given that,
Frequency = 50.0 Hz
Mass per unit length = 0.115 g/m
String length = 210.4 cm
Number of loops = 5
We need to calculate the mass is hung from the string
Using formula of frequency
Where, f = frequency
M = mass per unit length
T = tension
Put the value into the formula
We need to calculate the new frequency for 4 loops
Using formula of frequency
Hence, The mass of the string and new frequency are 20.78 g and 40.0 Hz.