Answer:
A) Vo = 137.34 [m/s]
B) Y = 961.38 [m]
C) y = 367.8[m] for t = 3 [s] and y = 470.88[m] for t = 4[s]
Explanation:
To solve this problem we must use the following equation of kinematics. We must keep in mind that the negative sign of the equation means that the acceleration of gravity acts in the opposite direction to the movement of the balloon.
A)
[tex]v_{f} =v_{o} -g*t[/tex]
where:
Vf = final velocity = 0 (the maximum hang time, maximum elevation)
Vo = initial velocity [m/s]
g = gravity acceleration = 9.81 [m/s²]
t = time = 14 [s]
0 = Vo - (9,81*14)
Vo = 137.34 [m/s]
B)
Now we use the following equation.
[tex]y=y_{o}+v_{o} *t -(\frac{1}{2} )*g*t^{2}[/tex]
where:
Yo = initial position = 0
Y = final position [m]
Vo = initial velocity = 137.34 [m/s]
Now replacing
Y = (137.34*14) - (0.5*9.81*14²)
Y = 961.38 [m]
C)
With the above equation, we can calculate the distances between t = 3 and t = 4 [s]
[tex]y=y_{o} +v_{o} *t - (1/2)*g*t^{2}[/tex]
y = (137.34*3) - (0.5*9.81*3²)
y = 367.8[m] for t = 3 [s]
for t = 4[s]
y = (137.34*4) - (0.5*9.81*4²)
y = 470.88[m]
A projectile has an initial x-velocity of 4 m/s, and an initial y-velocity of 27.7 m/s. What is the range of the projectile
Answer:
I love yourself help yourself
3. When a person is outside of the system and they add energy to the
system, we show this energy as
Answer:
We show added energy to a system as +Q or -W
Explanation:
The first law of thermodynamics states that, in an isolated system, energy can neither be created nor be destroyed;
Energy is added to the internal energy of a system as either work energy or heat energy as follows;
ΔU = Q - W
Therefore, when energy is added as heat energy to a system, we show the energy as positive Q (+Q), when energy is added to the system in the form of work, we show the energy as minus W (-W).
what do you know about healthy relationship true or false
Answer:
this question doesn't make sense
Explanation:
The unit of the electric resistance is ???
Answer:
OhmsStep-by-step-explanation :
Electric resistance
Dimension length :
Squared mass per time cubed , that is , electric current squared.
The SI derived unit of electric resistance is the ohm,(volt per ampere).
runnin reggie ran up a mountain from an elevation of 915 m to 4095 m in 62.25 min. If Reggie has a mass of 70 kg, how much power did Reggie generate during his run?
Answer:
....................
What force is necessary to pull a 10 kg sled across a horizontal surface at a constant velocity if the coefficient of kinetic friction between the sled and the ground is 0.25?
Answer:
Any force greater than 24.5 N
Explanation:
To find the frictional force is the 1st step. this can be found by multiplying the coefficient of friction and the normal force. normal force can be found by multiplying gravity (we will say 9.8 m/s/s) and the mass which is 10. You then multiply the result by the coefficient of friction which is 0.25 and it leads us to an answer to 24.5 N. This means that if you pull with exactly 24.5 N, the sled wouldnt move. So you need a force greater than 24.5 N and we have our answer.
I hope I helped correct me if im wrong
A force of 25 N is necessary to pull a 10 kg sled across a horizontal surface at a constant velocity if the coefficient of kinetic friction between the sled and the ground is 0.25.
First, we will calculate the normal force (N), which, in a horizontal surface, has the same magnitude and opposite sense as the weight (W) of the sled.
[tex]|N| = |W| = m \times g = 10 kg \times \frac{9.8m}{s^{2} } = 98 N[/tex]
where,
m: mass of the sledg: Earth's gravityThen, we will calculate the friction force (f) using the following expression.
[tex]f = \mu \times N = 0.25 \times 98 N = 25 N[/tex]
According to Newton's first law of motion, for the sled to move at a constant velocity, the sum of the force exerted (F) on the sled and the friction force (f) must be zero.
[tex]F + f = 0\\F = -f\\F = -25 N\\|F| = 25 N[/tex]
A force of 25 N is necessary to pull a 10 kg sled across a horizontal surface at a constant velocity if the coefficient of kinetic friction between the sled and the ground is 0.25.
You can learn more about friction here: https://brainly.com/question/18754989
All elements are composed of extremely small particles called
unit of power is derived unit why
Answer:
it was given the name Newton (N). from this, the derived unit of energy (or work) is defined ,as the work produced when the unit of force causes a displacement equal to the unit of length of its point of application along its direction . It was given the name Joule (J).
Explanation:
Suppose an object has a velocity of -7 m/s at t=0. What will the velocity be after 4 seconds if the acceleration of the object is +1 m/s^2?
Answer:
Vf = - 3 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f} =v_{o} +a*t[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity = - 7 [m/s]
a = acceleration = 1 [m/s²]
t = time = 4[s]
Now replacing:
Vf = -7 + (1*4)
Vf = - 3 [m/s]
Is it possible to generate emf without rotating the coil explain
Answer:
It's not possible.
Explanation:
It's not possible.
This is because when a coil is rotated in a magnetic field about a line which is not the axis of the coil, the magnetic coil with a link going through the coil will change and thus an EMF will be produced.
Now, this EMF produced is gotten as a result of cutting action through lines of magnetic flux gotten through rotation (physical movement) of the coil through space.
Faraday's law allows finding the result for whether it is possible to create induced electromotive force (emf) without rotating the coil are:
Producing a pulsating voltage is possible change the magnetic field the area of the loop. Producing constant voltage is not possible since a uniform change of some parameter is required and the only one that can change is the angle constantly.
Faraday's Law states that by varying the magnetic flux an electromotive force is produced.
[tex]emf = - \frac{d \Phi_B }{dt} \\\Phi_B = B . A[/tex]
Where emf is the induced voltage, Ф the magnetic flux, B the magnetic field and A the area of the loop
We can write the flow explicitly.
Ф = B A cos θ.
Therefore we see that there is some form of having this changing flow:
Changing the magnitude of the magnetic field. Changing the area of the loop. Changing the angle between the normal to the area and the magnetic field direction.
The first two methods are used in pulsating fields, that is, a voltage is obtained for a short period of time.
The last method is used in equipment that can give indicated voltage in a constant way, it is the method used to produce electricity, it consists of an external system that rotates the loop with a constant speed and produces an output voltage.
In conclusion using Faraday's law we can find the result for whether it is possible to create induced electromotive force (emf) without rotating the coil are:
Producing a pulsating voltage is possible change the magnetic field the area of the loop Producing constant voltage is not possible since a uniform change of some parameter is required and the only one that can change is the angle constantly.
Learn more here: brainly.com/question/1640558
guys please answer me i will be really thankful
the graph represents the motion of a car moving along a staright highway describe in words the motion car
Differentiate between the focus and the epicenter of an earthquake.
6. A total of 135 J of work is done on a gaseous refrigerant as it undergoes compression. If
the internal energy of the gas increases by 114 J during the process, what is the total amount
of energy transferred as heat? Has energy been added to or removed from the refrigerant as
heat?
Answer:
Eh = 21 [J]
Removed as heat.
Explanation:
This is a case of energy conservation, we have to take into account the energies that go in and out of the system. In this case, 135 [J] of energy are entered in the form of work of the compressor to the chamber where the refrigerant is compressed, now of these 135 [J] 114 [J] were used as internal energy, this internal energy is used to increase the pressure and temperature of the refrigerant.
In this way the rest of the energy of the 135 [J] was lost in the form of heat to determine this loss of energy, we simply perform the arithmetic subtraction.
Eh = 135 - 114 = 21 [J]
Eh = 21 [J]
What effect will the following have on the inertia of a body if
(i) the force acting on it is increased.
(ii) the mass of the body is reduced.
Explanation:
Inertia is the tendency of a body to remain at rest or to do nothing.
It is the resistance to any change in position of body.
When the force on a body increases, the inertia reduces
When the mass is reduced the inertia reduces
According to newton's first law or the law of inertia "an object will remain in its state of rest or of uniform motion unless if it is acted upon by an external force".
A boy on rollerskates is travelling along at 8 m/s. He has a mass of 60 kg and is carrying his
school bag of mass 10 kg. He throws the bag directly forward at 20 m/s relative to the
ground. Calculate the boy's speed after the 'explosion?
Answer:
6m/s
Explanation:
the original momentum = mass x velocity = 8x (60+10) = 560
momentum after = mass x velocity of the school bag + mass x velocity of the boy = 10x20 + 60x A
200+60A = 560
A=6
I need help asap!!!!!!! FVLS CIVICS
Step 2:
Brainstorm an idea for a new amendment to the Constitution. Answer the following questions about your new amendment idea.
What will this amendment do?
Whom will it benefit and how?
Answer:
Amendment (whatever you call it), but it would be amendment 28 if passed, lol
Explanation:
This amendment will be term limits for all members of House and Senate for Congress
How this amendment would benefit is that it would be more structured in Congress.
pls help me i need both answers pls help me this is being timed.
Answer:
it would have to be diagram C OR B
After our sun leaves the main sequence it will most likely
A.) become a supergiant and explode in a supernova explosion
B.) become a giant and eventually form a black hole
C.) become a supergiant and eventually form a dwarf star
D.) become a giant and eventually form a dwarf star
Which experimental discovery led Niels Bohr to revise Rutherford's model of
the atom?
A. Most alpha particles pass straight through a thin sheet of gold
foil.
B. Electrons have more energy the farther they are from the nucleus.
C. A few alpha particles bounce off a thin sheet of gold foil.
D. The beam in a cathode ray tube is moved by an electric force.
Answer:
Electrons have more energy the farther they are from the nucleus.
Explanation:
A P E X
with what force will the a car hit a tree if the car has a mass of 3,000 kg and a acceleration of 2m/s^2
Answer:
The answer is 6000 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 3000 × 2
We have the final answer as
6000 NHope this helps you
- A type of elevator called a cage is used to raise and lower miners in a mine
shaft. Suppose the cage carries a group of miners down the shaft. If the
unbalanced force on the cage is 60.0 N, and the mass of the loaded cage is
1.50 10 kg, what is the acceleration of the cage?
What is the force required to move a 5,000 kg car with an acceleration of 4 m/s?
Answer:
20000
Explanation:
f=m*a
mass=5000
a=4
5000*4=20000
A bicycle travels 22 km in 0.50 hr. What is its average speed?
Answer:
22/0.50=44
Explanation:
average speed= distance / time
What is the Law of Conservation of Energy?
Answer:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.
Explanation:
Hope this helped, Have a Great Day!!
A car's acceleration is 3m/s2. If the car started at rest and it only took 10s for the car to reach this acceleration, what is the car's final velocity?
Answer:
30m/s
Explanation:
From law of motion equation
Vf= Vi + at
Where Vf= final velocity
Vi= initial velocity=0(the car started at rest)
a= acceleration= 3m/s2
t= time= 10s
Then substitute into the equation to get the final velocity.
Vf= 0+(10×3)
Vf= 30m/s
Hence, the car's final velocity is 30m/s
The red car drive on a motor way in 800 m/s.The
driver of the Green car want to dive in that speed in
20 seconds.How many distance can he travel?
Cellular respiration takes place in the mitochondria of cells.
Answer:
True
Because mitochondria is the powerhouse of the cell.
Explanation:
Hope this helps you
Answer:
True
Explanation:
A rope attaches a tire to an overhanging tree limb. A girl swinging on the tire has a
centripetal acceleration of 4.0 m/s2. If the length of the rope is 3.1 m, what is the girl's
tangential speed?
Which is the best description of a balanced diet?[food pyramid]
A. A vegetarian diet that includes no meat
B. A diet that consists of fewer than 2,000 calories per day
C. A diet that includes a wide variety of nutritious foods
D. A diet in which you eat at most three times a day
Answer:
A vegetarian diet that includes no meet is the best description of a balanced diet
Answer:
I should be B
Explanation:
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The total sum of atoms in an object.
Answer:
Mass
Explanation:
The total sum of atoms in an object is the mass of the object. There are several ways to quantify the number of atoms in a substance.
In chemical calculations, the number of moles is a good representation of the number of atoms contained in a body. Mass is the amount of substances a body has. If we can sum up all the atoms in a substance, one will arrive at the mass of the substance