Answer:
a
[tex]V = 5.30 *10^{-2} \ m^3[/tex]
b
[tex]v_1 = 0.3127 \ m/s[/tex]
Explanation:
From the question we are told that
The number of identical drippers is n = 60
The diameter of each hole in each dripper is [tex]d = 1.0 \ mm = 0.001 \ m[/tex]
The diameter of the main pipe is [tex]d_m = 2.5 \ cm = 0.025 \ m[/tex]
The speed at which the water is flowing is [tex]v = 3.00 \ cm/s = 0.03 \ m/s[/tex]
Generally the amount of water used in one hour = 3600 seconds is mathematically represented as
[tex]V = A * v * 3600[/tex]
Here A is the area of the main pipe with value
[tex]A = \pi * \frac{d^2}{4}[/tex]
=> [tex]A = 3.142 * \frac{0.025^2}{4}[/tex]
=> [tex]A = 0.0004909 \ m^2[/tex]
So
=> [tex]V = 0.0004909 * 0.03 * 3600[/tex]
=> [tex]V = 5.30 *10^{-2} \ m^3[/tex]
Generally the area of the drippers is mathematically represented as
[tex]A_1= n * \pi \frac{d^2}{4}[/tex]
=> [tex]A_1 = 60 * 3.142 * \frac{0.001 ^2}{4}[/tex]
=> [tex]A_1 = 4.713 *10^{-5} \ m^2[/tex]
Generally from continuity equation we have that
[tex]Av = A_1 v_1[/tex]
=> [tex]0.0004909 * 0.03 = 4.713 *10^{-5} * v_1[/tex]
=> [tex]v_1 = 0.3127 \ m/s[/tex]
A 2.0 kg mass moving at 5.0 m/s suddenly collides head-on with a 3.0 kg mass at rest. If the collision is perfectly inelastic, how much kinetic energy was lost during the collision?
(a) 20 J
(b) 26 J
(c) 15 J
(d) 8 J
Answer:
correct answer is (c) 15 J
Explanation:
given data
mass m1 = 2 kg
velocity V1 = 5 m/s
mass other = 3 kg
so mass m2 = 2+ 3 kg = 5 kg
solution
we will apply here conservation of momentum:
m1V1 = m2V2 ..........................1
put here value and we get velocity v2
(2.0) × (5.0) = (2.0 + 3.0) × V
solve it we get
10 = 5 × V 2
V2 = 2.0 m/s
so here kinetic energy will be
KE = ½ × m × v²
so
∆KE = ½ × m1 × (v1)² - ½ × m2 × (v2) ²
∆KE = 0.5 × 2 × 25 - 0.5 × 5 × 4
∆KE = 25 - 10
∆KE = 15 J
a force F=600 N applied by a man on box and moves a distance d = 5m find the net work done on the box if the floor exerts a constant friction force of 20N
Answer:
Net work done = 2900 J
Explanation:
Net force acting on box = f = 600N - 20N = 580N
Work done = force applied x distance moved
W = f x d
W = 580N x 5m
= 2900 J
Hope this helps!
How are gases and liquids different from each other? A. Gases can change volume, and liquids cannot. O B. Liquids can change volume, and gases cannot. C. Gases can change shape, and liquids cannot. D. Liquids can change shape, and gases cannot.
Answer:
A.gasses can change volume, and liquids cannot
Explanation:
if you pour a glass of water you don't have to worry about it expanding such that it overflows. however if you air up a ballon you may notice that it becomes lager the warmer it gets and smaller the cooler it gets
A ball is thrown at 200 ms-2 and its mass is 0.05kg what force is necessary to change
its direction?
Answer:
F = 10 [N]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = forces [N]
m = mass = 0.05 [kg]
a = acceleration = 200 [m/s²]
[tex]F =m*a\\F = 0.05*200\\F = 10 [N][/tex]
Do you think all elements are pure substances? Why or why not?
No 120 elements are pure others are not pure
The net resultant force acting on an object is equal to what?
Answer:
When two or more forces are acting on a body, then the total of all the forces which causes the resulting effect is the resultant force or net force. As force is a vector, we need to take the vector sum of all the forces to calculate the resultant.
Explanation:
highlight the correct terms:
the (more/less) speed an object has, the (higher/lower) the potential energy and the (higher/lower) the kinetic energy.
45 joules were expended to move a box weighing 30 newtons. How many meters was it moved?
Answer:
1.5 meter is the answer
When you whirl a small rubber stopper on a cord in a vertical circle, you find a critical speed at the top for which the tension in the cord is zero. At this speed. the force of gravity on the object 1S itselfisufficient to supply the necessary centripetal force. How slowly can you swing a 15-g stopper like this so that It will just follow a circle with a radius of m?
Answer:
√(9.8/m) radians per second
Explanation:
The centripetal acceleration required for a radius of m is ...
a = mω²
so, the angular speed required is ...
ω = √(a/m) = √(g/m) . . . . . where g is the acceleration due to gravity
ω = √(9.8/m) . . . radians per second
__
The speed is independent of the mass. For a 1 m radius, the speed is about 29.9 RPM.
Suppose that you are holding a cup of coffee in your hand identify all forces on the cup and reaction to each force
Answer:
Newton's third law.
Explanation:
•your hand of holding UP/DOWN the cup has a reaction with force
•Coffee inside the cup is pushing outward to the edges of the cup
•The cup is pushing inward onto the coffee
"His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A."
If mass increases ,what must happen to the force in order to achieve the same change in motion?
Answer:
increase
Explanation:
One of the harmonics of a string fixed at both ends has a frequency of 52.2 Hz and the next higher harmonic has a frequency of 60.9 Hz. What is the fundamental frequency of the string?
Solution :
Frequency may be defined as the number of observation or number of waves that is taken in per unit time. The unit of frequency is Hertz or Hz.
It is given that :
Successive harmonic frequencies, f = 52.2 Hz
and f' = 60.9 Hz
Therefore, fundamental frequency, F = f' - f
F = 60.9 - 52.2
F = 8.7 Hz
Therefore the string which is fixed at both the ends forms all the harmonics.
An object has a GPE that is 833 J. Its height above ground is 4.25 m. What is its mass?
Answer:
Mass of the object is 20 kg.
Explanation:
Formula to calculate the gravitational potential energy is,
P.E. = mgΔh
m = mass of the object
g = acceleration due to gravity = 9.8 meter per square second
Δh = Height of object from the ground
By substituting the values in the formula,
833 = m × 9.8 × 4.25
m = [tex]\frac{833}{41.65}[/tex]
= 20 kg
Therefore, mass of the object is 20 kg.
How many doctors are ther in Edmonton
Answer:
There are nine PCNs in the Edmonton area. They work alongside more than 1,100 family doctors in over 330 clinics to provide care for 1.2 million patients. PCN teams include more than 370 nurses, mental health clinicians and other health professionals.
Explanation:
Calculate the minimum amount of work needed to move a 500-kg rocket payload from Earth's surface to the ISS in orbit 400,000m above Earth's surface.
Answer:
2.000.000.000
Explanation:
Apply the formula:
Work = Force . Displacement
W = 500.10 . 400.000 (the 10 come from gravity)
W = 5000 . 400.000
W = 2.000.000.000 Joules
I think it is that, can be wrong.
A square coil of wire with 15 turns and an area of 0.40 m2 is placed parallel to a magnetic field of 0.75 T. The coil is flipped so its plane is perpendicular to the magnetic field in 0.050 s. What is the
Answer:
90 V
Explanation:
What is the magnitude of the average induced emf in the coil?
Given that
The number of turns, N = 15
Area of coil, A = 0.4 m²
Magnetic field of the coil, B = 0.75 T
Time taken, t = 0.05 s
The average induced EMF in a coil due to the presence of a magnetic field is given as:
v = -NBA/t
When we substitute the values directly, we have
v = - (15 * 0.4 * 0.75)/0.05
v = -4.5 / 0.05
v = -90
Therefore, the magnitude of the induced emf is 90 V
Please choose all that describe a series circuit.
(that’s option 1 ^^)
2.) the electrons have multiple pathways to travel
3.) a series circuit has no resistors
4.) if one device in a series circuit burns out or is disconnected, the entire circuit is broken
5.) the amount of current is the same at every point in a series circuit
6.) each time there is damage (break) in any one of the resistors the entire circuit will not function
7.) all of the parts of a series circuit -power source, wires and devices- are connected along the same pathway
8.) if there are many bulbs in a circuit with a battery (cell), it is very likely that the light will be brighter with each additional bulb
choose all correct options
Answer:
Correct Answer
4,5,6,7
A wagon is pushed across a level road. If it is moving at 25 m/s at an angle of 15° to the
ground. Determine the horizontal component with which the wagon moves.
Answer:
Hope it help u plz Brain-list the answer tnx dear
Explanation:
As we know the horizontal component of velocity is
Vx=V *cos(angle)
As given V=25 m/sec
angle=15 degree
hence
Vx= 25* cos(15)
Vx = 25*0.9659
Vx= 24.14 m/sec
50 Point Physics Question!
What is the acceleration of object 2 and how did you determine that value?
What is the acceleration of the object 1 and how did you determine that value?
What is the tension in the string (show work)?
What is the mass of the object 1 (show work)?
Objects 1 and 2 are labelled with a 1 and 2
Answer:
dfsdfgsdfaefffsfffefefef
Explanation:
eg3g3gf3f3f3f3f3f3f3f3f3f3ggeg
Convert 75 minutes to second
calculate force. find the force needed to lift a 2000 n weight using a machine with a mechanical advantage of 15
Answer:
The force needed to lift the load is 133.33 N.
Explanation:
Given;
load to be lifted, L = 2000 N
mechanical advantage of the machine, M.A = 15
Mechanical advantage is calculated as;
M.A = L / E
where;
E is the effort or force needed to lift the load.
Substitute the given values and solve for E
E = L / M.A
E = (2000) / (15)
E = 133.33 N
Therefore, the force needed to lift the load is 133.33 N.
True or False: A boy pushed a box with a weight of 300N up a ramp. He said that, because the ramp was 1.0m high and 3.0m long, he must have been pushing with force of exactly 100N.
Answer:
False
Explanation:
The force of an object does not depend on the dimensions of the said object. The formula for force is
F = Ma, where
m = mass and a = acceleration
The force is dependent on the size of the object and its acceleration. An object 2m by 5m running at a acceleration of x m/s² and weighing y kg will have the same force as another object 15m by 25m running at the same acceleration x m/s² and weighing y kg
If tony uses a force of 1525 N to drive his car a distance of 381 m, how much work is done on his car?
Hello!!
For calculate the work let's applicate the formula:
[tex]\boxed{W=Fd}[/tex]
[tex]\textbf{Being:}[/tex]
[tex]\sqrt{}[/tex] W = Work = ?
[tex]\sqrt{}[/tex] F = Force = 1525 N
[tex]\sqrt{}[/tex] d = Distance = 381 m
⇒ [tex]\text{Then let's \textbf{replace it according} we information:}[/tex]
W = 1525 N * 381 m
⇒ [tex]\text{Let's resolve it: }[/tex]
W = 581025 J
[tex]\textbf{Result:}\\\text{The work is \textbf{581025 Joules}}[/tex]
Work done on an object is the product of force and displacement. The work done on the car by the force of 1525 N making a displacement of 381 m is 581 KJ.
What is work done?When a force applied to an object make a displacement of the body or stopes its motion, the force is said to be work done on the object. Thus, work done can be taken as the product of force and displacement.
Work done like force is a vector quantity thus characterized with magnitude and direction. Work done is equivalent to the energy required to make the object displaced.
Given the force = 1525 N
displacement = 381 m
work done = force × displacement
w = 1525 N × 381 m = 581 KJ.
Therefore, the work done on the car is 581 KJ.
Find more on work done:
https://brainly.com/question/30073908
#SPJ2
Weight is used most often for measuring____________________ whereas volume is used most often for measuring________________________
Answer:
Weight is used most often for measuring solid whereas volume is used most often for measuring liquid.
Explanation:
Weight is used most often for measuring solid, because solids have definite shape. Weight is usually expressed in Newton (N) because it is a function of mass and gravity. ( weight = mass x gravity).
Whereas volume is used most often for measuring liquid, usually expressed in cubic meter (m³) because liquids have no definite shape, rather they occupy the volume of their container.
Unpolarized light passes through two polarizers whose transmission axes are at an angle of 42.0 degrees with respect to each other. What fraction of the incident intensity is BLOCKED by the polarizers
Answer:
The value is [tex]k = 0.7239[/tex]
Explanation:
From the question we are told that
The angle between the transmission axes of the polarizer [tex]\theta = 42^o[/tex]
Gnerally the intensity light emerging from the first polarizer is
[tex]I_1 = \frac{I_o }{2}[/tex]
Generally according to malus's law the intensity of light emerging from the second polarizer is mathematically represented as
[tex]I_2 = I_1 * cos^{2} (\theta )[/tex]
=> [tex]I_2 = \frac{I_o }{ 2} * cos^{2} (42 )[/tex]
=> [tex]I_2 = 0.2761 I_o[/tex]
Generally the incident intensity is BLOCKED by the polarizers is mathematically represented as
[tex]I = I_o - I_2[/tex]
=> [tex]I = I_o - 0.2761 I_o[/tex]
=> [tex]I = 0.7239 \ I_o[/tex]
Hence the fraction of the incident intensity is BLOCKED by the polarizers is
[tex]k = 0.7239[/tex]
An object weighs 275 N when fully immersed in water and 325 N when fully immersed in oil of specific gravity 0.9. The volume of the object (m3) is most nearly:___________
Answer:
V = 0.05 m^3
Explanation:
The weight of the object of mass (m) and volume (V) in water is: 275 N and it is calculated using the buoyancy formula:
275 N = m g - V (dw) g
where (dw) is the density of water (1000 kg/m^3)
The weight of the object in oil is 325 N and it is calculated using the buoyancy formula as:
325 N = m g - V (do) g
where "do" is the density of oil which is: 0.9 x 1000 kg/m^3 = 900 kg/m^3
Therefore, subtracting term by term the two equations:
325 N -275 N = mg - mg - V (do) g + V (dw) g
50 N = V g (dw - do)
50 N = V g (1000 - 900)
50 N = V g (100)
solving for V (which will result in units of m^3):
V = 50 / 981 m^3
V = 0.05 m^3
Where do daughter cells obtain their dna
Answer:
The parent cell
Explanation:
Answer
Mitosis phase - The DNA in the parent cell nucleus makes a copy of itself and is then split between the two daughter cells during mitosis
Explanation
This is biology, not really physics.
Find the value of the spring constant for the spring in Trial I. Use 0.367 s for the value of the period. The mass of the suspended block is 0.400 kg.
Answer:
117.28 N/m
Explanation:
step one:
given
Period T= 0.367s
mass m= 0.4kg
Required
the spring constant k
Step two:
The expression for the period, mass and spring constant relation is
T=2π√m/k
making k subject of the formula
[tex]T/2 \pi = \sqrt m/k[/tex]
square both sides
[tex](T/2 \pi)^2= m/k[/tex]
[tex]k= m/(T/2 \pi)^2[/tex]
[tex]k=0.4/(0.367/2*3.142)^2[/tex]
[tex]k=0.4/(0.05840)^2[/tex]
[tex]k=0.4/0.0034105\\\\k=117.28 N/m[/tex]
identify each statement as an example of melting or sublimation.
Answer:
Your answers are correct
Explanation:
In my opinion, your answers are grouped in the appropriate columns.
What is equilibrium?
Answer:
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.
Explanation:
Equilibrium is defined as a state of balance or a stable situation where opposing forces cancel each other out and where no changes are occurring. ... An example of equilibrium is when hot air and cold air are entering the room at the same time so that the overall temperature of the room does not change at all.
