ANSWER
C. 5 seconds to 7 seconds
EXPLANATION
This is a velocity time graph.
We can read the final velocity, v,the initial velocity u and the time easily from the graph.
See attachment for the initial and final velocities on each time interval.
So we can use either of the following equations to calculate the distance traveled.
Or
.
During the time interval 0 to 3, the distance traveled is,
.
During the time interval 3 to 5 seconds, the distance traveled is,
.
During time interval, 5 to 7 seconds the distance traveled is,
.
During time interval 7 to 8 seconds the distance traveled is
.
During time interval 8 to 10 seconds the distance traveled is
.
The correct answer is C.
The formula that relates the 3 variables, namely: mass,
volume, and density is: Density = mass / volume.
Let us identify each variable:
Density - more accurately called the volumetric mass density of a
substance is its mass per unit volume. It is a key concept that examines how
materials communicate in a lot of things, i.e weather, material sciences,
engineering, and other fields of science.
Mass – defined as a property of
a physical body in Physics, and when a net force is applied,
it results to the measure of a specific
object’s resistance to acceleration.
Volume - <span>contained or
occupied by the space of a substance or shape (either by a solid, liquid, gas
or plasma state)</span>
Answer:
The largest allowable Io = 5.863 * 10^26 photons
Explanation:
thickness of slab = 2.8 mm
First we express the energy of each photon
wavelength = 313 nm
attached below is the detailed solution on how i arrived at the answer above
note : we use 2 in the integral because the slab is exposed to light from two different direction
Answer:
2.4681 m/s
Explanation:
= Mass of cannon ball = 29 kg
= Mass of performer = 65 kg
= Initial Velocity of cannon ball = 8 m/s
= Initial Velocity of performer = 0 m/s
v = Velocity of combined mass
As the linear momentum of the system conserved
The recoil velocity is 2.4681 m/s