Answer:
2420 J
Explanation:
From the question given above, the following data were obtained:
Force (F) = 22.9 N
Angle (θ) = 35°
Distance (d) = 129 m
Workdone (Wd) =?
The work done can be obtained by using the following formula:
Wd = Fd × Cos θ
Wd = 22.9 × 129 × Cos 35
Wd = 22.9 × 129 × 0.8192
Wd ≈ 2420 J
Thus, the workdone is 2420 J.
The table provided shows the masses and volumes of four liquids. A student has a mystery liquid with a density of 3 g/mL. Which liquid does the student have?
Liquid 1
Liquid 2
Liquid 3
Liquid 4
Answer: Liquid 2, if it's 3 g/mL and liquid 2 has 6gs and 2 mLs than it's 3g/mL
What is an appraisal of an employee's performance in the workplace?
A. consensus
B. evaluation
C. procedure
D. metacognition
Answer:
B. evaluation
Explanation:
An employee can be defined as an individual who is employed by an employer of labor to perform specific tasks, duties or functions in an organization.
Basically, an employee is saddled with the responsibility of providing specific services to the organization or company where he is currently employed while being paid a certain amount of money hourly, daily, weekly, or monthly depending on the contractual agreement between the two parties (employer and employee).
Hence, while an employer may be the owner of a business firm or company, an employee is a subordinate employed to provide unwavering services to the employer while also, being professional and diligent at all times.
Human resources management (HRM) can be defined as an art of managing, controlling and improving the number of people (employees or workers), functions, evaluation of employees, activities which are being used effectively and efficiently by an organization.
Hence, human resources managers are saddled with the responsibility of recruiting, evaluating, managing and improving the welfare and working conditions of the employees working in an organization.
Basically, the human resources manager carry out appraisals on the performance of the various employees working in an organization. These informations about employees are typically used for promotional purposes, allowances and other benefits or form of rewards.
On a distance-time graph, what is shown when the curve is flat going from left to the right?
A. a negative speed
B. no speed
C. a positive speed
D. It does not mean anything.
Please help me !!im on a test
what is renewable and non-renewable energy?
Renewable resources:
A renewable resource is one that can be used repeatedly and does not run out because it is naturally replaced.
Nonrenewable resource:
A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource.
Thenks and pls mark me brainliestt :))
Answer:
Renewable energy includes solar, hydro, and wind energy. Non-renewable energy includes coal, gas, and oil.Explanation:
Renewable energy is useful energy that is collected from renewable resources, which are naturally replenished on a human timescale. A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption.
what is the difference between kinetic and potential energy
Answer:
Kinetic energy is energy possessed by a body by virtue of its movement. Potential energy is the energy possessed by a body by virtue of its position or state. While kinetic energy of an object is relative to the state of other objects in its environment, potential energy is completely independent of its environment. Hence the acceleration of an object is not evident in the movement of one object, where other objects in the same environment are also in motion. For example, a bullet whizzing past a person who is standing possesses kinetic energy, but the bullet has no kinetic energy with respect to a train moving alongside.
I think this answer is helped you
Answer:
the what state does alduos is 500 stack of ml tayo the little man ♂️ jajao
kalokoha ya
ansjsjdk
Imagine a truck crashes into a building. What kind of sound wave does this make?
Thr wave of sound that makes the truck is vibration
A block of wood has mass 4kg, what is the density of the wood if the mass of water is 3kg and its volume is half that of the block of the block of wood ?
Will give brainliest! 50 points!!!
When the polarity of a moving magnet through a coil doubles the electromagnetic field _________.
A. Increases
B. Decreases
C. Stays the same
Answer:
C
Im not totally sure but that's what my science teacher taught me sorry if is wrong
If you dropped a ball off the roof, and could neglect air resistance, the impact velocity of the ball on the sidewalk would be 102 miles per hour [mph]. Calculate the height of the building in units of feet.
Answer:
h = 105.98 m
Explanation:
We will use the third equation of motion here:
[tex]2gh= v_f^2-v_i^2[/tex]
where,
g = acceleration due to gravity = 9.81 m/s²
h = height = ?
vf = final speed = (102 mi/h)(1 h/3600 s)(1609.34 m/1 mi) = 45.6 m/s
vi = initial speed = 0 m/s
Therefore,
[tex]2(9.81\ m/s^2)h = (45.6\ m/s)^2-(0\ m/s)^2\\\\h = \frac{ (45.6\ m/s)^2}{2(9.81\ m/s^2)}[/tex]
h = 105.98 m
Calculate the speed of your cat as it runs towards its food bowl 14.7m away in 4.5 s. Give answer in mph.
Answer:
3.26mph
Explanation:
To calculate speed, use the formula distance/time. In this case, just divide 14.7 by 4.5.
The speed with which the cat runs towards its food bowl is 7.3 Miles per hour.
Given the data in the question
Distance of cat from it's food bowl; [tex]s = 14.7m[/tex]Time taken for the cat to reach the food bowl; [tex]t = 4.5s[/tex]Speed of the cat; [tex]v = \ ?[/tex]
Speed is the time rate at which an object is moving along a path
Speed is the time rate at which an object is displaced.
Speed = Distance / Time
[tex]v = s / t[/tex]
We substitute our values into the equation
[tex]v = \frac{14.7m}{4.5s}\\\\v = 3.267 m/s\\\\v = 7.3mph[/tex]
Therefore, the speed with which the cat runs towards its food bowl is 7.3 Miles per hour.
Learn more: https://brainly.com/question/680492
These waves are most harmful for living things.
What waves are most harmful for living things?
A radio
B microwaves
C infrared
D visible
E ultraviolet
F x-rays
G gamma rays
Explanation:
G. gamma rays because they are produced by the hottest and most energetic objects in the universe, such as neutron stars and pulsars, supernova explosions, and regions around black holes.
hope this helps you
have a nice day:)
what is relative density
Answer:
Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material.
Explanation:
Please help in one minute will mark brainlist
Answer: Different types of telescopes usually don't take simultaneous readings. Space is a dynamic system, so an image taken at one time is not necessarily the precise equivalent of an image of the same phenomena taken at a later time. And often, there is barely enough time for one kind of telescope to observe extremely short-lived phenomena like gamma-ray bursts. By the time other telescopes point to the object, it has grown too faint to be detected.
Explanation: Trust me
Hypothesis what is it
Explanation:
hope it helps.
stay safe healthy and happy.Please select the word from the list that best fits the definition
location of most volcanoes
Island arc
Lava
Basalt
Magma
Hotspot
Plate boundaries
Answer:
The answer is E., or "Plate Boundaries".
The word best describes the definition of the location of volcanoes is "plate boundaries". Therefore, option (E) is correct.
What are plate boundaries?The lithosphere is broken into tectonic plates that undergo some large motions and the boundary regions between plates are called plate boundaries. Based on their motions there are three kinds of plate boundaries: divergent, convergent, and transform.
Divergent boundaries are moving away from one another and separate, they form a rift. As the gap widens, the underlying layer may be soft for molten lava underneath to push upward and resulting in the formation of volcanic islands.
Convergent boundaries move towards one another and collide, subduction usually takes place. The denser plate goes underneath the less dense one and the plate boundaries also experience buckling.
Transform boundaries slide alongside one another and are exposed to huge amounts of stress and strain and are momentarily held in place. The two plates succeed in moving with respect to one another and cause earthquakes.
Learn more about plate boundaries, here:
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In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10 m, and the distance between the slits is 0.100 mm. If the first-order bright fringe is measured to be 3.40 cm from the centerline, what is the wavelength of the light?
Answer:
Wavelength of the light = 3.09 meter
Explanation:
Given:
Distance between slits and the screen = 1.1 meter
Distance between slits = 0.1 mm
First-order bright fringe = 3.40 cm from centerline
Find:
Wavelength of the light
Computation:
Distance between slits = 0.1 mm
Distance between slits = 0.0001 meter
First-order bright fringe = 3.40 cm from centerline = 0.034 meter
Wavelength of the light = [(Distance between slits)(First-order bright fringe)]/Distance between slits and the screen
Wavelength of the light = [(0.0001)(0.034)] / 1.1
Wavelength of the light = [(0.0001)(0.034)] / 1.1
Wavelength of the light = 3.09 meter
oscillating spring mass systems can be used to experimentally determine an unknown mass without using a mass balance. a student observes that a particular spring-mass system has a frequency of oscillation of 10 Hz. the spring constant of the spring is 250 N/m. what is the mass?
Answer:
0.063 Kg
Explanation:
From the question given above, the following data were obtained:
Frequency (f) = 10 Hz
Spring constant (K) = 250 N/m
Mass (m) =?
Next, we shall determine the period of oscillation. This can be obtained as follow:
Frequency (f) = 10 Hz
Period (T) =?
T = 1/f
T = 1/10
T = 0.1 s
Finally, we shall determine the mass of the spring. This can be obtained as follow:
Spring constant (K) = 250 N/m
Period (T) = 0.1 s
Pi (π) = 3.14
Mass (m) =?
T = 2π√(m/K)
0.1 = 2 × 3.14 × √(m/250)
0.1 = 6.28 × √(m/250)
Divide both side by 6.28
0.1 / 6.28 = √(m/250)
Take the square of both side.
(0.1 / 6.28)² = m/250
Cross multiply
m = (0.1 / 6.28)² × 250
m = 0.063 Kg
Therefore, the mass of the spring is 0.063 Kg.
Gravitationally, how does the alignment of the sun, earth, and moon being in a straight line influence earth's tides?
Answer:
The alignment of the sun, earth, and moon being in a straight line causes very low and extra-high, low and high tides respectively due to the additive effect of the solar tide on the lunar tide.
Explanation:
Tides can be defined as the rise and fall of water level in water bodies such as lakes and oceans due to the gravitational force of attraction exerted by the moon on earth. The side closest to the moon creates a bulge of water known as high tide. Low tides are generally experienced when a sea level is not within the bulge.
Generally, the gravitational pull of the Moon cause visible changes on planet Earth's surface.
This ultimately implies that, the pull of the Moon's gravity causes high and low tides on planet Earth's surface.
The various types of ocean tides based on the position of the Earth, Moon and the Sun are;
I. Neap tides.
II. Spring tides.
III. Low tide.
IV. High tide.
V. Brown tide.
VI. Rip tide.
VII. Red tide.
Generally, the alignment of the sun, earth, and moon being in a straight line causes very low and extra-high, low and high tides respectively due to the additive effect of the solar tide on the lunar tide. Thus, this alignment of the sun, earth, and moon being in a straight line gives rise to spring tides.
Types of government
Answer:
Explanation:
The different types of government include a direct democracy, a representative democracy, socialism, communism, a monarchy, an oligarchy, and an autocracy
A 34-kg child runs with a speed of 2.8 m/s tangential to the rim of a stationary merrygo-round. The merry-go-round has a momentum of inertia of 510 kg*m2 and a radius of 2.31 m. When the child jumps onto the merry-go-round, the entire system begins to rotate. What is the angular speed of the system
Answer: [tex]0.43\ rad/s[/tex]
Explanation:
Given
Mass of child [tex]m=34\ kg[/tex]
speed of child is [tex]v=2.8\ m/s[/tex]
Moment of inertia of merry go round is [tex]I=510\ kg.m^2[/tex]
radius [tex]r=2.31\ m[/tex]
Conserving the angular momentum
[tex]\Rightarrow mvr=I\omega \\\Rightarrow 34\times 2.8\times 2.31=510\times \omega\\\\\Rightarrow \omega=\dfrac{219.912}{510}\\\Rightarrow \omega=0.43\ rad/s[/tex]
What cycle moves carbon from one part of the Earth to another
Answer:
The cycle that moves carbon from one part of the Earth to another is called the carbon cycle.
Explanation:
The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere. Since our planet and its atmosphere form a closed environment, the amount of carbon in this system does not change. Where the carbon is located — in the atmosphere or on Earth — is constantly in flux.
On Earth, most carbon is stored in rocks and sediments, while the rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs, or sinks, through which carbon cycles. Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms. In the case of the ocean, carbon is continually exchanged between the ocean’s surface waters and the atmosphere, or is stored for long periods of time in the ocean depths.
Humans play a major role in the carbon cycle through activities such as the burning of fossil fuels or land development. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising; it is already considerably greater than at any time in the last 800,000 years.
An object whose weight is 100 lbf experiences a decrease in kinetic energy of 500 ft-lbf and an increase in potential energy of 1500 ft-lbf. The initial velocity and elevation of the object, each relative to the surface of the earth, are 40 ft/s and 30 ft, respectively.
Required:
a. Find final velocity in ft/s.
b. Find final elevation.
Answer:
a) the final velocity is 35.75 ft/s
b) The final elevation is 45 ft
Explanation:
Given the data in the question;
Weight of object; W = 100 lbf
Change in kinetic energy; ΔE = 500 ft-lb
so
[tex]\frac{1}{2}[/tex]m[tex]v_i^2[/tex] - [tex]\frac{1}{2}[/tex]m[tex]v_f^2[/tex] = ΔE
[tex]\frac{1}{2}[/tex]m[tex]v_i^2[/tex] - [tex]\frac{1}{2}[/tex]m[tex]v_f^2[/tex] = 500
multiply both sides by 2
m[tex]v_i^2[/tex] - m[tex]v_f^2[/tex] = 1000
m( [tex]v_i^2[/tex] - [tex]v_f^2[/tex] ) = 1000
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = 1000/m
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = (1000)(g) / W
we know that, acceleration due to gravity g = 9.8 m/s² = 32.18 ft/s²
so we substitute
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = (1000)(32.18) / 100
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = (1000)(32.18) / 100
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = 32180 / 100
[tex]v_i^2[/tex] - [tex]v_f^2[/tex] = 321.8
since The initial velocity [tex]v_i[/tex] is given to be 40 ft/s;
(40)² - [tex]v_f^2[/tex] = 321.8
1600 - [tex]v_f^2[/tex] = 321.8
[tex]v_f^2[/tex] = 1600 - 321.8
[tex]v_f^2[/tex] = 1278.2
[tex]v_f[/tex] = √1278.2
[tex]v_f[/tex] = 35.75 ft/s
Therefore, the final velocity is 35.75 ft/s
b)
we know that;
change in potential energy is;
ΔP.E = mg( h[tex]_f[/tex] - h[tex]_i[/tex] )
given that; increase in potential energy; ΔP.E = 1500 ft-lbf
and mg = Weight = 100 lbf
we substitute
1500 = 100( h[tex]_f[/tex] - h[tex]_i[/tex] )
h[tex]_f[/tex] - h[tex]_i[/tex] = 1500 / 100
h[tex]_f[/tex] - h[tex]_i[/tex] = 15 ft
given that, elevation of the object; h[tex]_i[/tex] = 30 ft
h[tex]_f[/tex] - 30 ft = 15 ft
h[tex]_f[/tex] = 15 ft + 30 ft
h[tex]_f[/tex] = 45 ft
Therefore, The final elevation is 45 ft
A p-n junction diode is, as the name suggests, an electronic device that is made up of a p-type semiconductor and an n-type semiconductor joined together.
a. True
b. False
Answer:
a. True
Explanation:
When a p-type semiconductor is placed adjacent to an n-type semiconductor the common plane thus formed is termed as P-N Junction or P-N Junction Diode.
The diode is formed by melting both p-type and n-type semiconductors through a special manufacturing process called "Thermo-Compression Proces".
The P-N junction has a property of one-way conduction. It means it only allows the current to pass through it in one direction and the current flow is practically zero in the other direction. Thus, it can act as a diode. The p-side acts as the anode, while the n-side acts as the cathode.
Hence, the correct option is:
a. True
A pendulum swings past it's pole 20 times in 18 seconds, what is the period of the pendulum?
Answer: 0.9
Explanation:
If frequency equals the amount of oscillations in one second then 20/18 = f = 1.11 and to find period (T) then we use the equation T= 1/f or in this case 1/1.11 = 0.9
girl is sitting on a tire swing that is attached with a rope that is 2.1 m in length. Her dad pushes
her with a speed of 3.0 m/s. If the centripetal force is 88 N, what is the mass of the girl?
pls help
Answer:
m=29.6kg
Explanation:
your welcome:) have a great day
15 cm
Gas
Mercury
If the atmospheric pressure is 750 mmHg, what is the pressure of the gas in:
(i) mmHg
you multiply 15cm by 750 mmhg
what unit is used to measure resistance
Answer:
Ohms
Explanation:
The unit of resistance is ohms.
In the physics lab, a block of mass M slides down a frictionless incline from a height of 35cm. At the bottom of the incline it elastically strikes another block that is only one-half its mass. Find the velocity of block M at the bottom of the incline before the collision with the small block m.
Solution :
Given :
M = 0.35 kg
[tex]$m=\frac{M}{2}=0.175 \ kg$[/tex]
Total mechanical energy = constant
or [tex]$K.E._{top}+P.E._{top} = K.E._{bottom}+P.E._{bottom}$[/tex]
But [tex]$K.E._{top} = 0$[/tex] and [tex]$P.E._{bottom} = 0$[/tex]
Therefore, potential energy at the top = kinetic energy at the bottom
[tex]$\Rightarrow mgh = \frac{1}{2}mv^2$[/tex]
[tex]$\Rightarrow v = \sqrt{2gh}$[/tex]
[tex]$=\sqrt{2 \times 9.8 \times 0.35}$[/tex] (h = 35 cm = 0.35 m)
= 2.62 m/s
It is the velocity of M just before collision of 'm' at the bottom.
We know that in elastic collision velocity after collision is given by :
[tex]$v_1=\frac{m_1-m_2}{m_1+m_2}v_1+ \frac{2m_2v_2}{m_1+m_2}$[/tex]
here, [tex]$m_1=M, m_2 = m, v_1 = 2.62 m/s, v_2 = 0$[/tex]
∴ [tex]$v_1=\frac{0.35-0.175}{0.5250}+\frac{2 \times 0.175 \times 0}{0.525}[/tex]
[tex]$=\frac{0.175}{0.525}+0$[/tex]
= 0.33 m/s
Therefore, velocity after the collision of mass M = 0.33 m/s
Se transmiten ondas transversales en una cuerda tensada orientada sobre el eje x. La función de ondas correspondientes es y= 5.00 sen(6.05x + 5.19t + 1.57). Donde y y x están en metros y t en segundos. Cual es la rapidez de las ondas que se transmiten en dicha cuerda?
Answer:
Explanation:
Whats the entire question?
A 4.00-kg block hangs by a light string that passes over a massless, frictionless pulley and is connected to a 6.00-kg block that rests on a frictionless shelf. The 6.00-kg block is pushed against a spring to which it is not attached. The spring has a spring constant of 180 N/m, and it is compressed by 30.0 cm. Find the speed of the block after the spring is released and the 4.00-kg block has fallen a distance of 40.0 cm.
Answer:
v = 2.82 m/s
Explanation:
For this exercise we can use the conservation of energy relations.
We place our reference system at the point where block 1 of m₁ = 4 kg
starting point. With the spring compressed
Em₀ = K_e + U₂ = ½ k x² + m₂ g y₂
final point. When block 1 has descended y = - 0.400 m
Em_f = K₂ + U₂ + U₁ = ½ m₂ v² + m₂ g y₂ + m₁ g y
as there is no friction, the energy is conserved
Em₀ = Em_f
½ k x² + m₂ g y₂ = ½ m₂ v² + m₂ g y₂ + m₁ g y
½ k x² - m₁ g y = ½ m₂ v²
v² = [tex]\frac{k}{m_2} x^2 - 2 \frac{m_1}{m_2} \ g y[/tex]
let's calculate
v² = [tex]\frac{180}{6.00} \ 0.300^2 - 2 \ \frac{4.00}{6.00} \ 9.8 \ (- 0.400)[/tex]
v² = 2.7 + 5.23
v = √7.927
v = 2,815 m / s
using of significant figures
v = 2.82 m/s