1 .
the ratio of work output to work input or the ratio of AMA to IMA
efficiency
2 .
the energy of a moving object
kinetic energy
3 .
a grooved wheel over which a rope can move
pulley
4 .
a double-sided inclined plane
screw
5 .
an inclined plane wrapped around a cylinder
wedge
Answers
Answer:
1. Efficiency
2. Kinetic energy
3. Pulley
4. Screw
5. Wedge
Explanation:
1. Efficiency: the ratio of work output to work input or the ratio of actual mechanical advantage (AMA) to ideal mechanical advantage (IMA).
Mathematically, the efficiency of a machine is given by the formula;
\( Efficiency = \frac {MA}{IMA} * 100 \)
2. Kinetic energy: the energy of a moving object. Kinetic energy (KE) is an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
\( K.E = \frac{1}{2}MV^{2}\)
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
3. Pulley: a grooved wheel over which a rope can move. It is made up of a wheel and rope which allows force to be multiplied such as in a drawing well.
4. Screw: a double-sided inclined plane. It is held in position and then used to tighten two or more objects together.
5. Wedge: an inclined plane wrapped around a cylinder. It can be used to split objects into halves.
Related Questions
how big is the black hole at the center of the milky way
Answers
At the center of our galaxy lies the supermassive black hole Sagittarius A*, often abbreviated Sgr A*. This giant is about 4 million times the mass of the sun and about 14.6 million miles (23.6 million kilometers) in diameter.
In physics, the Milky Way refers to the galaxy in which our solar system resides. The Milky Way is a barred spiral galaxy, meaning it has a central bar-shaped structure with arms spiraling out from it. The galaxy is estimated to be around 13.6 billion years old and contains billions of stars, as well as gas, dust, and dark matter.
The Milky Way has a diameter of approximately 100,000 light-years and is located about 26,000 light-years from the galactic center. It rotates once every 240 million years, with stars closer to the center moving faster than those on the outer edges. The gravitational force of the Milky Way holds the solar system in its orbit.
The study of the Milky Way is important in astrophysics as it provides insight into the evolution and formation of galaxies.
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Is water wet?
I need an argument.
Answers
Answer:
no :)
Explanation:
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Liquid water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.
Pllzzzz help I will mark u as a brainliest
Answers
Answer:
You dont need BRAINLY there is an app called slader where you scan the textbook barcode and it shows you the answers for the question in the textbook.
Explanation:
Who was Nikola Tesla?
Answers
Answer:
Nikola Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current electricity supply system.
pressure due to a heel of the pointed shoe is greater than the pressure of the elphant legs
Answers
Answer:
Pressure is inversely proportional to the area.
As we know the area covered by elephant legs is more so less pressure is exerted but in case of pointed shoe the area covered is less so more pressure is exerted.
How high can a human throw a ball if he can throw it with initial velocity 90 mph.
a144.3 m
b 91.82 m
c 82.45 m
d99.82 m
e45.52 m
Answers
Answer:
c 82.45 m
Explanation:
To solve this problem, we have to apply the right motion equation.
Given parameter;
Initial velocity = 90mph
So;
Using;
V² = U² - 2gh ; we can solve this problem
V is the final velocity = 0mph
U is the initial velocity
g is the acceleration due to gravity
h is the height
Now insert the parameters and solve;
We need to convert from mph to m/s
1 mph = 0.45m/s
90mph = 40.5m/s
0² = 40.5² - (2 x 9.8 x h)
0 = 1640.25 - 19.6h
-1640.25 = -19.6h
h = 83.7m
If two identical airplanes are loaded such that one has the CG at the forward limit, and the other has the CG at the aft limit:
Group of answer choices
The airplane with the CG at the forward limit will go faster
The airplane with the CG at the aft limit will go faster
CG will not affect speed
The airplane with the CG at the forward limit is more likely to stall during the takeoff roll
Answers
If two identical airplanes are loaded such that one has the CG at the forward limit, and the other then the correct answer is: CG will not affect speed.
The position of the center of gravity (CG) affects the stability and control of an airplane, but it does not directly affect its speed. The speed of an airplane is determined by factors such as engine power, aerodynamic design, and external conditions (e.g., wind). The position of the CG primarily influences the longitudinal stability of the aircraft and its tendency to pitch up or down.
Therefore, the speed of the airplanes, in this case, would not be affected by the position of the CG. The airplane with the CG at the forward or aft limit may have different stability characteristics, but their speeds would not be inherently different due to CG placement alone.
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The following well is to be equipped with a surface choke operating in critical flow. Determine the well's producing capacity and the choke size required for the following conditions
o No choke
o Choke at wellhead
o Choke at separator
Well depth = 10,000ft
Tubing Size = 1.995 inch
Pr = 3000psia
fw =0
C=0.0023STB/ day-psi
Flowline length =5,000ft
Flowline Size =2 inch
GLR=500scf/STB
P sep =100psig
n=0.85
For the given well, the pressure gradient in the well and tubing are expresses by the following two equations
Tubing: P wh =0.9Pwf−0.95Q−100
Flowline: P sep = P wh q −0.35Q+2.5
Answers
To determine the well's producing capacity and the required choke size, we need to analyze three scenarios: no choke, choke at the wellhead, and choke at the separator.
In the case of no choke, the well is unrestricted, and the pressure at the wellhead (Pwh) is equal to the flowing bottomhole pressure (Pwf). We can use the Tubing equation to calculate the producing capacity:
Pwh = 0.9Pwf - 0.95Q - 100
For the choke at the wellhead, we need to consider the critical flow condition. This means that the pressure at the wellhead is determined by the flow rate (Q) and the choke size (nozzle diameter). By rearranging the Tubing equation, we can solve for the required choke size:
Nozzle diameter = (0.9Pwf - Pwh - 100) / 0.95
For the choke at the separator, we use the Flowline equation to determine the well's producing capacity. Rearranging the equation, we find:
Pwh = (Psep + 0.35Q - 2.5) / q
Now, we can substitute the values for the given conditions (well depth, tubing size, Pr, fw, C, flowline length, flowline size, GLR, Psep, and n) into these equations to calculate the producing capacity and the required choke size for each scenario.
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If viewed at the correct time and in the right conditions, asteroids, comets, and meteors are all visible to the nked eye.
true or false
Answers
Answer:
True
Explanation:
If it is at right conditions and correct time (night time most likely) they will all be visible
A high-voltage transmission line is made of bare wire; it is not insulated. Assume that the wire is 100 km long, has a resistance of 7.0 ohm, and carries 200 A. A bird is perched on the wire with its feet 2.0 cm apart. What is the potential difference between its feet?
Answers
Voltage drop across 2 cm of wire= 2 * 14 V = 28 V. The potential difference between the feet of the bird is 28 V..
A high-voltage transmission line is a wire that carries power across long distances. It is not insulated. This is due to the high voltage used to transmit electricity, which requires a minimum clearance from the ground and other structures. A bird perched on the wire with its feet 2.0 cm apart.
The potential difference between its feet is to be calculated.Below is the working:Resistance of the wire=7.0 ohmLength of the wire =100 km= 100000 mCurrent flowing through the wire = 200 APotential difference between the feet of the bird = Voltage drop across 2 cm of wireVoltage drop across 1 meter of wire = Voltage drop across 100 cm of wire=I*R= 200 * 7 = 1400 VVotage drop across 1 cm of wire= 1400/100 = 14.
Therefore, voltage drop across 2 cm of wire= 2 * 14 V = 28 V. The potential difference between the feet of the bird is 28 V.Answer: The potential difference between the feet of the bird is 28 V.
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a speedboat has a mass of 5.0x10 2 kg starting at rest, it travels to 220 m/s in 3.0 s. find the net force on the boat
Answers
The net force on the boat is 3.67 x 10⁴ N.
We can use the equation F=ma, where F is the net force, m is the mass, and a is the acceleration. First, we need to find the acceleration of the boat using the equation a = (vf - vi) / t, where vf is the final velocity, vi is the initial velocity (which is 0 in this case), and t is the time. Plugging in the given values, we get:
a = (220 m/s - 0 m/s) / 3.0 sa = 73.3 m/s²Now, we can find the net force using the equation F=ma:
F = (5.0x10² kg)(73.3 m/s²)F = 3.67 x 10⁴ NTherefore, the net force on the boat is 3.67 x 10⁴ N.
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a basketball is being pushed by two players during tipoff. one player exerts a downward force of 11n at a distance of 7cm from the axis of rotation. the second player applies an upward force of 15n at a perpendicular distance of 14cm from the axis of rotation. find the net torque actingon the ball.
Answers
From the calculations, we can be able to obtain the net torque that is acting on the ball as 2.23 Nm.
What is the net torque?We must have to recall that the term torque must have to refers to the kind of force that is able to cause a rotation. Thus the torque is a rotating force. It has to do with a force that acts on an object that has an axis of rotation.
We have to first find out the torque that is on each of the cases before e can now use the result to find the net torque. We must state at this point that the net torque can be found vectorially.
Downward torque = Force * distance
= 11 N * 0.07 m = 0.77 Nm
Upward torque = 15 N * 0.14 m
= 2.1 Nm
Net torque = √(0.77)^2 + (2.1)^2
= 2.23 Nm
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Consider an electron near the Earth's equator. In which direction does it tend to deflect if its velocity is directed in each of the following directions?
(a) downward Direction
(b) northward Direction
(c) westward Direction
(d) southeastward Direction
Answers
When an electron is near the Earth's equator, it deflects if its velocity is in the following directions:
When an electron is near the Earth's equator and its velocity is in the direction of:
(a) Downward: The magnetic field lines are perpendicular to the Earth's surface at the equator, so the force on the electron is perpendicular to its velocity. The magnetic force on the electron is in the direction of eastward or westward.
(b) Northward: Magnetic force will act in the direction of eastward.
(c) Westward: Magnetic force will act in the direction of northward.
(d) Southeastward: In the southeastward direction, the magnetic force on the electron will be in the direction of northward.
To sum up, when an electron is near the Earth's equator, the direction of the magnetic force on it changes based on the direction of its velocity.
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Does light travel from one place to another in a wavelike or a particle-like way?.
Answers
Light travels as a wave and hits like a particle.
Inside the physical sciences, a particle is a small localized object to which may be ascribed numerous bodily or chemical houses, along with extent, density, or mass.
In the course of chemical adjustments, debris do exchange with atoms or ions regrouping. Bonds hyperlinks between atoms damage and new ones' shape and energy is either given out or taken in. some chemical changes are initiated with the aid of mixing.
A particle is an exceedingly tiny piece of rely, and scientists trust that the whole thing in the universe is made from particles. debris can range in length, from large subatomic particles, like electrons, or an awful lot smaller microscopic particles like atoms or molecules.
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what is the x component fx of the resultant force?
Answers
the x component fx of the resultant force Fcosθ
In order to find the x-component of the resultant force, we first need to calculate the x-components of the individual forces. Let's assume that the force F1 is acting at an angle of θ1 with respect to the x-axis, and the force F2 is acting at an angle of θ2 with respect to the x-axis. Then we can find the x-components of the forces as follows:
Fx1 = F1 cos(θ1)
Fx2 = F2 cos(θ2)
Now we can find the x-component of the resultant force by adding the x-components of the two forces:
Fx = Fx1 + Fx2
So the x-component of the resultant force is:
Fx = F1 cos(θ1) + F2 cos(θ2)
Note that if the angles θ1 and θ2 are measured in degrees, then we need to convert them to radians before taking the cosine function. We can do this by multiplying the angle in degrees by π/180.
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jordan has a mass of 65kg and carlos has a mass of 78.0kg. jordan is running at 5.75m/s when he is tackled by carlos who is running in the opposite direction. after the collision of both players are at rest. calculate their velocity before the collision.
Answers
Given
mj = 65 kg
mc = 78 kg
voj = 5.75 m/s
after collision
vfj = vfc = 0 m/s
Procedure
The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
\(\begin{gathered} p_o=p_f \\ m_jv_{0j}-m_cv_{0c}=0 \\ m_jv_{0j}=m_cv_{0c} \\ v_{0c}=\frac{m_jv_{0j}}{m_c} \\ v_{0c}=\frac{65kg*5.75m/s}{78kg} \\ v_{Oc}=4.8m/s \end{gathered}\)
The velocity before the collision would be 4.8m/s
Which statement describes the energy transformation that occurs when a person eats a sandwich before a hike
Answers
The sandwich contains nutrients such as carbohydrates, fats, and proteins. During digestion, these macronutrients are broken down into smaller molecules and absorbed into the bloodstream. Through cellular respiration, the body's cells convert these molecules into adenosine triphosphate (ATP), which is a form of chemical energy.
During the hike, the ATP molecules are broken down by the cells, releasing the stored chemical energy. This energy is then utilized by the body's muscles to perform mechanical work, allowing the person to walk, climb, and engage in physical activities.
In summary, the energy transformation involves the conversion of chemical potential energy in the sandwich into ATP, and then the conversion of ATP into mechanical energy used by the person's body during the hike.
Why does it seem that brom bones knew something about what happened that night of the harvest ball?.
Answers
The fact that Brom Bones was defeated in a duel and Izabod was able to get away from him suggests that he was aware of what happened on the night of the Harvest Ball.
Actually, Ichabod's only opportunity to get away from the Hessian Rider while he is being pursued is through Brom. But it quickly becomes apparent that Brom was mistaken about the bridge's protective capabilities when Ichabod crosses it to perceived safety and is nonetheless beheaded by the Horseman, who "pass by like a whirlwind," despite their passing by.Ichabod enjoys reading scary stories, telling them to others, and learning about other people's experiences.Ichabod's saddle suddenly gave way, and Gunpowder began running towards the bridge. The Headless Horseman tossed his "head" at Ichabod and knocked him off the horse, despite the fact that he had managed to ride bareback across the bridge.To know more about harvest ball
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if your car becomes disabled while on the highway, you should: stop in the right lane. park with all four wheels off the traveled highway, if possible. stop where you are.
Answers
If your car becomes disabled while on the highway, you should park with all four wheels off the traveled highway, if possible.
When your car becomes disabled on the highway, it is important to prioritize safety and minimize the risk to yourself and other drivers. Parking with all four wheels off the traveled highway helps ensure that your vehicle is not obstructing the flow of traffic and reduces the likelihood of accidents.
Stopping in the right lane can be dangerous as it blocks the lane and increases the risk of collisions. It is generally recommended to move your vehicle out of the flow of traffic to a safe location if possible.
Simply stopping where you are, especially if it is in a traffic lane, is not advisable as it poses a hazard to both you and other drivers. Taking appropriate actions to move your vehicle safely off the highway is crucial in such situations.
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This diagram shows two different forces acting on a skateboarder. The
combined mass of the skateboard and the person is 65.2 kg. Based on this
information, what is the acceleration of the skateboarder?
Air resistance = 55.20 N
Applied force = 31.80
si
A. 0.36 m/s2 to the left
B. 1.46 m/s2 to the left
C. 0.36 m/s2 to the right
D. 1.47m/s2 to the right
Answers
Answer:
Option A. 0.36 m/s to the left
Explanation:
From the question given above, the following data were obtained:
Force resistance (Fᵣ) = 55.2 N
Applied force (Fₐ) = 31.8 N
Mass (m) = 65.2 kg.
Acceleration (a) =?
Next, we shall determine the net force acting on the skateboarder. This can be obtained as illustrated below:
Force resistance (Fᵣ) = 55.2 N
Applied force (Fₐ) = 31.8 N
Net force (Fₙ) =?
Fₙ = Fᵣ – Fₐ
Fₙ = 55.2 – 31.8
Fₙ = 23.4 N to the left
Finally, we shall determine the acceleration of the skateboarder. This can be obtained as follow:
Mass (m) = 65.2 kg.
Net force (Fₙ) = 23.4 N to the left
Acceleration (a) =?
F = ma
23.4 = 65.2 × a
Divide both side by 65.2
a = 23.4 / 65.2
a = 0.36 m/s
Since the net force acting on the skateboarder is to the left. Therefore, the acceleration of the stakeholder will also be towards the left (i.e 0.36 m/s to the left)
Answer:
A. 0.36 m/s to the left
pls help ill give 100 points to brainliest
Answers
Answer:
Below given.
Explanation:
The general form of a direct variation formula is y=kx. passes axis at 0.Equations of the form y = kx + b where b is a number other than zero are not direct variation equations because when x is zero in any of these y is not zero.1) Direct
2) Not Direct
3) Direct
4) Not Direct
5) Not Direct
6) Direct
7) Not Direct
8) Not Direct
How do you find the magnitude of a uniform electric field?
Answers
To find the magnitude of a uniform electric field, we can use formula E = (k * Q) / r^2.
What is the magnitude of the electrical field?The magnitude of the electric field is simply described as the force per charge on the test charge. The standard metric units on electric field strength come from its definition. Since electric field is described as a force per charge, its units would be force units divided by charge units.
The electric field formula or magnitude of electric field equation for an electric charge Q at distance r from the charge is:
E = (k * Q) / r^2
where:
k is a constant which called Coulomb's constant and is equal to 8.987x109Nm^2/C^2.Q is the source's charge, which measured in coulombs (C).r is the distance from the charge to the point of measurement, in units of meters (m).E is the electric field, which measured by Newton per coulomb (N/C).Learn more about magnitude of the electrical field at: https://brainly.com/question/28561944
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A2.0kg arrow is fired at 10m/s into a stationary 10 kg block of ice as shown below: the arrow sticks into the block of ice and they start moving . What is the velocity of the arrow/ice combination after the collison
Answers
Answer:
the velocity is 1.67 m/s
Explanation:
The computation of the velocity of the arrow/ice combination after the collison is shown below:
Here the law of conservation is applied
\(p_i = p_f\\\\m_av_a+m_b+v_b= (m_a + m_b)v\)
Here
\(m_a = 2.0 kg\\\\v_a = 10m/s\\\\m_b = 10 kg\\\\v_b = 0\)
Now
\(v = \frac{m_av_a+ m_bv_b}{m_a + m_b} \\\\= \frac{(2.0kg) (10 m/s) + 0}{2.0kg + 10.0kg}\)
= 1.67 m/s
hence, the velocity is 1.67 m/s
If an area has high air pressure and low humidity, what type of weather will it most likely have?
Answers
Answer:
c
Explanation:
Find the initial velocity of an object traveling at a constant acceleration of 3.9 m/s2
, if the
object traveled 70,000 meters for 12 hours. Round to nearest hundredths place
Answers
Answer: 1.62 m/s
Explanation:
Distance/time=speed
12 hours in minutes is 720
12x60=720
720 minutes in seconds is 43200
720x60=43200
70000/43200=1.62037
1.62 m/s
A within-subjects experiment with 30 volunteers is used to test the effect of light color on mood. The experiment has a single light bulb type with 3 different ambient color schemes. The experiment has 3 different rooms, each room with a different colored light bulb. Which of these is the factor in this experiment?
Answers
In this experiment, the factor is the ambient color schemes. In other words, the independent variable is the ambient color schemes.
What are ambient color Schemes?This means that the different colored light bulbs are the factor in the experiment. Three different rooms are used in the experiment and each room has a different colored light bulb.
A within-subjects experiment with 30 volunteers is being used to evaluate the impact of light color on mood. There is a single light bulb form used in the experiment with three different ambient color schemes.
Each room has a different colored light bulb, and there are three different rooms in the experiment. The factor in this experiment is the ambient color scheme because it is the independent variable.
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A circuit contains a 10 Ohm heater and six 240 Ohm lamps,
each containing a 60 Watt bulb, all connected in series. The
voltage across the circuit is 120 V. What is the current in the
circuit when only 4 lamps are turned on? What is the current in
the circuit when all the lamps are turned on? What is the
current in the circuit when all six lamps and the heater are
turned on? If the circuit has a fuse which will melt if the current
exceeds 12 A, will the fuse melt?
Answers
Answer -
1. Since the circuit is connected in series, the current in the circuit will be 0 if all the components of the circuit are not turned on. This is because of the single path that a series circuit has. So here, when only 4 lamps are turned on, the current in the circuit will be 0.
2. In this case as well, the current passing through the series circuit will be 0 as the heater which is connected to the circuit through series connection is not switched on.
3. If all the components of the series circuit is turned on,
Equivalent Resistance,
Rn = R1 + R2 + R3 + R4 + R5 + R6 + R7
Rn = 10Ω + 240Ω + 240Ω + 240Ω + 240Ω + 240Ω + 240Ω
∴ Rn = 1450Ω.
Then, current flowing through the circuit will be V/Rn.
I = V/Rn
I = 120V / 1450Ω
I = 0.08275 A
I ≈ 0.083.
4. The fuse will not melt as it is of 12A and the current flowing through the series circuit is 0.083, which is less that 12A.
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A Shuttle astronaut is sent to repair a defective relay in a 600. 00- kg satellite that is traveling in space at 17 00. 0 m/s * a * w * a * y Suppose the astronaut and his Manned Maneuvering Unit ( MMU) have a mass of 400. 00 kg and travel at 17 010. 0 m/s toward the satelliteWhat is the combined velocity when the astronaut grabs hold of the satellite?
Answers
A Shuttle astronaut is sent to repair a defective relay in a 600. 00- kg satellite that is traveling in space. The combined velocity when the astronaut grabs hold of the satellite is 17,004.4 m/s.
The combined velocity of the astronaut and the satellite when the astronaut grabs hold of the satellite is the relative velocity between the two objects. The relative velocity can be calculated using the principle of conservation of momentum. The principle states that the total momentum of an isolated system remains constant if no external forces act on it.
The initial momentum of the satellite is
= (600.00 kg) * (17,000.0 m/s)
= 10,200,000 kg*m/s
The initial momentum of the astronaut and the MMU is
= (400.00 kg) * (17,010.0 m/s)
= 6,804,400 kg*m/s
The final momentum of the combined system is
= (600.00 kg + 400.00 kg) * v,
where v is the final velocity of the combined system.
The conservation of momentum equation:
=> initial momentum = final momentum
= 10,200,000 kgm/s + 6,804,400 kgm/s
= (1000 kg) * v
= v
= (10,200,000 + 6,804,400) / 1000
= v
= 17,004.4 m/s
So, the combined velocity of the astronaut and the satellite when the astronaut grabs hold of the satellite is 17,004.4 m/s.
It's important to note that the relative velocity is the same in both directions, this is a vector quantity and direction is important.
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name and describe the process that fuels the sun
Answers
Answer:
The Sun derives all its energy from a fusion cycle. In that process, tiny hydrogen molecules combine into a continuous proton-proton chain to create larger helium nuclei. The above figure illustrates the fusion of hydrogen into helium.
Explanation:
Hope this helps.
Answer:
nuclear fusion
Explanation:
In this process, small hydrogen molecules fuse together to form bigger helium nuclei in a continuous proton-proton chain.
for a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T, where t is time in seconds. If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0m from the axis of the solenoid, find the radius of the solenod
a- 77m
b -.30m
c- 9m
d-.94 m
Answers
The induced electric field outside the solenoid is given by the equation E = -dΦ/dt, where Φ is the magnetic flux through a surface.
The magnetic field inside the solenoid is given by the equation B(t) = 5.0t T.
Assuming the solenoid has a uniform magnetic field, the magnetic flux through a circular surface of radius r is Φ = B(t)πr^2.
Differentiating this equation with respect to time gives dΦ/dt = 5πr^2.
Substituting the given values of E and r in the above equations, we get:
1.1 = -5πr^2 / dt
Solving for r, we get r = 0.94 m.
Therefore, the radius of the solenoid is 0.94 m.
In summary, we use the equation for induced electric field outside the solenoid and the equation for magnetic field inside the solenoid to derive an expression for magnetic flux. Differentiating the expression with respect to time and solving for the radius of the solenoid, we get the answer as 0.94 m.
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