Answer:
a
The velocity is
b
The diameter is
Explanation:
The diagram of the set up is shown on the first uploaded image
From the question we are told that
The height of the water tank is
The position of the hole below water level
The rate of water flow
According to Bernoulli's theorem position of the hole
Where u is the initial speed the water through the hole = 0 m/s
is the atmospheric pressure
Substituting value
The Volumetric flow rate is mathematically represented as
Making A the subject
substituting value
Area is mathematically represented as
making d the subject
Substituting values
Answer:
t=1s
Explanation:
Using the formula
s=ut+1/2at^2
4.9 = (0)(t) + 1/2(9.8)(t^2)
4.9 = 4.9(t^2)
t^2 = 1
t = 1
The range is
We know that in cinematic problems the velocity in different directions is independent, so on the y-axis, or the y-velocity we have the gravity acceleration changing the velocity, although on the x-axis, or the x-velocity we don't have any acceleration, so the velocity is constant, so, we can use the basic cinematic equations and adapt them for our problem:
We can simplify it, we know that all the initial position on the x-axis is zero, but the initial position on the y-axis is 30, we also know that the initial velocity on y-axis is zero, so
I won't put numbers know, let's do all the manipulation first.
When the ball hit the ground we know that his position is 0 on the y-axis, so
Now we know when the ball hits the ground, so we can use this time on the position equation on the x-axis and find out the distance the ball travelled
That's all! we can just put the values know.
Hope you liked it
Question? Ask me in the comments
Answer:
They are both correct.
Explanation:
The density of an object is defined as the ratio of its mass to its volume. This implies that the density of the object is both proportional to the mass and also to the volume of the object. John only mentioned mass which is correct. Linda mentioned the second variable on which density depends which is the volume of the object.
Hence considering the both statements objectively, one can say that they are both correct.
The SI unit of measure for work, as well as
for all other kinds of energy, is the "joule".