Answer:
a?
Explanation:yes it is a
A 20kg object acceleration by a force of 200N with coefficient of kineticfriction is 0.4 what is acceleration of the object?
Answer:
Given - M = 20 kg
k = 0.4
F = 200 N
To find - acceleration
Solution -
F= kMA
200 = 0.4 * 20 * acceleration
200 = 8 * a
a = 8/200
a = 0.04 m s²
a = 0.04 m s²Questions: 1. A table of weight 500N has four legs covering a total area of 0.5m². Calculate the pressure applied by the table on the ground
2. A man with a mass of 50kg, is standing on the ground. His two feet cover an area of 0.01m². calculate the pressure exerted by his two feet
3. An elephant has a weight of 40000N and her feet cover a total area of 0.5m². A woman weighs 600N and area of her heels in contact with the ground is 0.0075m². Who exerts the greatest pressure on the ground?
Answer:
shown below
Explanation:
1) P = F/A
P = 500 / 0.5
P = 1000N/m²
2) W = mg
W = 50 x 9.8
W = 490
P = F/A
P = 490 / 0.01
P = 49000N/m²
3) P = F/A
For E:
P = 40000 / 0.5
P = 80000N/m²
For W:
P = 600 / 0.0075
P = 80000N/m²
They're exerting the same amount of pressure on the ground
Select the correct answer.
Jack lives in a society where he has almost no political power. Governmental institutions handle all political, social, and economic affairs.
Which political system is this?
OA. totalitarianism
B. monarchism
C. democracy
D. chiefdom
Answer:A or totalitarianism
Explanation: Totalitarianism is an authoritarian form of government in which the ruling party recognizes no limitations whatsoever on its power, including in its citizens' lives or rights
Some characteristics of totalitarianism:
Rule by a single party.
Total control of the military.
Total control over means of communication (such as newspapers, propaganda, etc…)
Police control with the use of terror as a control tactic.
Control of the economy.
Which observations correctly describe the second law of thermodynamics? check all that apply.
thermal energy that is not used to do work is often released to the surroundings.
thermal energy flows from a cooler object to a warmer object.
thermal energy flows from a warmer object to a cooler object.
thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.
thermal energy flows when two objects in contact have a temperature difference.
answers: 1,3,4,5
Answer:
I would agree with the answers 1, 3, 4, 5
Obviously energy will not spontaneously flow from a cooler object to a warmer object
Answer:
A. Thermal energy that is not used to do work is often released to the surroundings.
C. Thermal energy flows from a warmer object to a cooler object.
D. Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.
E. Thermal energy flows when two objects in contact have a temperature difference.
Explanation:
Got it right on edge 23
which group on the periodic table wants to gain 2 electrons?
Answer:
Periodic
Explanation:
The groups in the periodic table that want to gain electrons are groups; 15, 16 and 17. The members of these groups are mostly nonmetals.
Select the definition that best describes the term “ultimate tensile strength.”
Ultimate tensile strength is the maximum stress that a material can withstand just before fracture.
What is stress?
Stress is defined as the force acting per unit area. It is denoted by Sigma(σ)
When a body is undergoing stretch by applying a pull force, it stretches more and more until it reaches its elastic limit. A point comes when the body no more stretches and breaks or fractures at bottle neck formation. This strength of any material is known as Ultimate breaking Stress or Ultimate tensile strength.
Thus, Ultimate tensile strength is the maximum stress that a material can withstand just before fracture.
Learn more about Stress.
https://brainly.com/question/12871096
#SPJ1
the question is confusing
Alpha particles have highest mass.
Alpha particles are most ionising.
Gamma particles are the most penetrating.
Beta particles are negatively charged.
Gamma particles have the highest speed.
Comparing the three types of ionizing radiation-alpha particles have the greatest mass. Alpha particles have approx 4 times the mass of a proton or neutron and 8,000 times the mass of a beta particle. Ionising power of alpha particle is very high due to double positive charge, large mass as compared to a beta particle. Alpha particles can cause multiple ionisations within a very small distance. Beta radiation is more penetrating than alpha radiation. beta radiation can pass through the skin, but it is absorbed by a few cm of tissue of the body or a few mm of aluminum. Gamma radiation is the most penetrating of the three radiations. Alpha particles are positively charged, while beta particles are negatively charged, and gamma radiation is electrically neutral. Gamma rays are similar to visible light but they have higher energy. Gamma rays are emitted along with alpha or beta particles during radioactive decay.learn more about gamma rays here:
https://brainly.com/question/2399890
#SPJ10
Please, please help i will give 50 points to someone who will help me get this correct!!!!!
can you write the question because i cant see it
Transparent or translucent materials
are used to make
A stop signs
B suitcases
C color filters
D toothbrushes
Answer:
C
Explanation:
you need to be able to see through a colour filter, which means youd need transparent or translucent
Transparent materials passes light and they reflect also. The color filters are made by transparent or translucent materials. Thus option c is correct.
What is transparency?The ability of a material to pass light through it is called transparency. Some transparent materials can reflect the light. For example mirror, glasses etc. The materials which passes light but are not transparent is called translucent materials.
The material which does not pass light inside is called opaque. Wood, plastics etc. are opaque materials. Transparent covers, glasses make their inside visible.
Colour filters are made by transparent or translucent materials. They are used to filter or choose a particular colour from a group of reflected lights.
Color filters are used in spectrometers and other optical devices. They filter the incoming wavelengths to select the desired one. Hence, option c is correct.
To find more about color filters, refer the link below:
https://brainly.com/question/28455847
#SPJ2
Where is UTC the local time?
UTC is generally adopted as the local time at Prime Meridian (PM).
What is UTC?UTC is an abbreviation for Coordinated Universal Time and it can be defined as a local time standard by which all clocks, time and time zones are regulated around the world.
This ultimately implies that, Coordinated Universal Time (UTC) is generally adopted as the local time at Prime Meridian (PM) because it nominally reflects mean solar time.
Read more on UTC here: https://brainly.com/question/14333785
#SPJ12
Against the park ranger's advice, a visitor at a national park throws a stone horizontally off the edge of a 83 m high cliff and it lands a distance of 93 m from the edge of the cliff, narrowly missing a visitor below.
What was the initial horizontal velocity of the rock, in m/s? You can round your answer to the hundredths place and use g ≈ 10 m/s2.
26.6 00
Fig. E26.6 both meters are ide-
alized, the battery has no appre-
ciable internal resistance, and the
ammeter reads 1.15 A. (a) What
does the voltmeter read? (b) What
is the emf & of the battery?
26.7 For the circuit shown
For the circuit shown in Figure E26.6
V
45.0 Ω
25.0 Ω
ww(A)
|15.0 Ω
www
|15.0 Ω
W
www
ww
4+
35.0 = ?
10.0 Ω
a. The voltmeter reads 0.053 volts
b. The electromotive force, emf of the battery is 0. 106 volts
How to determine the voltmeter reading
a. Given the current = 1. 15A
Voltmeter reads the voltage = V
Resistance could be gotten from the diagram = R
V = IR
To find the resistance from the structure
First, find the resistance in parallel
Resistance in parallel = 1/R1 = 1/R2 + 1/R3 = 1/25 + 1/15 + 1/15 = 0. 17 Ohms
Now, find the resistance in series
Resistance in series = R1 + R2 + R3 = 45 + 0. 17 + 10 = 55. 17 Ohms
Finally, the resistance in parallel = 1/35 + 1/55. 17 = 0. 028 + 0. 018 = 0. 046 Ohms
Substitute values into the equation
V = IR
V = 1. 15 * 0. 046
V = 0. 053 Volts
b. To find the Emf, use the formula
Emf = V + Ir
Substitute the values into the formula
Emf = 0. 053 + 1.15 * 0.046
Emf = 0. 053 + 0. 0529
Emf = 0. 106 volts
Therefore, the voltmeter reads 0.053 volts and the electromotive force of the battery us 0. 106 volts
Learn more about electromotive force here:
https://brainly.com/question/17082851
#SPJ1
describe in your own words the conditions established by forward- and reverse-bias conditions on a pâ€""n junction diode and how the resulting current is affected.
The conditions established by forward- and reverse-bias conditions on a P-N junction diode are: For forwarding bias, the current flows easily without opposition, this causes more current to pass, For reversed bias, the current flow is restricted and this causes less amount of current to pass.
Meaning of a Forward and reversed biasA forward bias is a state attained by a diode as a result of its positive terminal that is connected to the positive part of a circuit and its negative terminal connected to the negative part of the circuit.
A reversed bias is a state attained by a diode as a result of its positive terminal that is connected to the negative part of a circuit and its negative terminal connected to the positive part of the circuit.
In conclusion, The conditions established by forward- and reverse-bias conditions on a P-N junction diode are: For forwarding bias, the current flows easily without opposition, which causes more current to pass, For reversed bias, the current flow is restricted and this causes less amount of current to pass.
Learn more about forward and reversed bias: https://brainly.com/question/20228400
#SPJ11
The conditions established by forward- and rear- bias conditions on a P- N junction diode are For encouraging bias, the current flows fluently without opposition, this causes further current to pass, For reversed bias, the current inflow is confined and this causes lower quantum of current to pass.
Meaning of a Forward and reversed bias-
A forward bias is a state attained by a diode as a result of its positive outstation that's connected to the positive part of a circuit and its negative terminal connected to the negative part of the circuit.A reversed bias is a state attained by a diode as a result of its positive outstation that's connected to the negative part of a circuit and its negative terminal connected to the positive part of the circuit.
In conclusion, The conditions established by forward- and rear- bias conditions on a P- N junction diode are For encouraging bias, the current flows fluently without opposition, which causes further current to pass, For reversed bias, the current inflow is confined and this causes lower quantum of current to pass.
Learn more about forward and reversed bias here:
https://brainly.com/question/24500692
#SPJ10
Which moon shows evidence of rainfall and erosion by some liquid substance?.
Answer:
Titan.It is the largest moon of Saturn
Which of the following consists of photovoltaic cells?
1. Solar panels
2. Rube Goldberg device
3. Solar oven
4. Electric generator
write the function of force
Answer:
Force can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size.
what is true about solar system densities
The statement that is true about solar system densities is The denser planets lie closer to the Sun while the farther one planets from the sun have lower densities.
What is solar system?Solar system comprises of the the planets, moon, stars, comets , smaller bodies and how they orbit around the sun.
Therefore, The statement that is true about solar system densities is The denser planets lie closer to the Sun.
Learn more about solar system below.
https://brainly.com/question/23169135
#SPJ11
how do the interiors of jupiter and saturn differ? (select all that apply.)
The interior part of Jupiter and Saturn are different from each other due to difference of core and magnetic field.
How do the interiors of Jupiter and Saturn differ?The interiors of Jupiter and Saturn differ from one another because Jupiter has a larger metallic hydrogen core as compared to Saturn. It has stronger magnetic field as compared to Saturn.
So we can conclude that the interior part of Jupiter and Saturn are different from each other due to difference of core and magnetic field.
Learn more about Jupiter here: https://brainly.com/question/3522722
#SPJ11
1. George is traveling to Boston from Springfield. Springfield is 144
kilometers from Boston. If speed-(distance)/(time), how fast was he
going if it took him 3 hours to get to our state capital?
Answer:
48 kilometers per hour
Explanation:
144/3 = 48 km/h
sound travels through a
Answer:
A.3.64 m
Explanation:
Because
v=(fλ)(1382)=(380)λλ=3.637m~3.64mwhere ,v=velocity
f=frequency
λ=wave length
Answer:
3.64
Explanation:
the formula is Already provided which is Velocity(m/s)= frequency (HZ) × wavelength
making wavelength stand alone
wavelength= velocity/ frequency
wavelength= 1382/380
wavelength= 3.64
find the energy u of the capacitor in terms of c and q by using the definition of capacitance and the formula for the energy in a capacitor.
The energy stored in a capacitor is determined as ¹/₂Q²/C.
Energy stored in a capacitorThe energy stored in a capacitor is determined from the following formulas as shown below;
U = ¹/₂Q²/C
Where;
Q is the chargeC is capacitanceU is energy stored.Thus, the energy stored in a capacitor is determined as ¹/₂Q²/C.
Learn more about energy stored in a capacitor here: https://brainly.com/question/14811408
#SPJ11
A compound microscope that has an eyepiece lens with a magnification of 10X and an objective lens with a magnification of 25X will have a total magnification of __________ times.
Answer:
35
Explanation:
total magnification = eyepiece lens x objective lens
TM = 10X x 25X
TM = 250X
Use wave equation calculate the speed of sound in the air if frequency of 110 hz has a wave length of 3 m
The distance between slits on a diffraction grating is 0.60
How large is the path difference?
mm, and one of the angles of diffraction is 0.30°. The
light forms a second-order bright band.
O 1047 nm
• 1571 nm
© 3142 nm
6284 nm
The path difference is 1.57 × 10⁻⁶ m
Distance is the amount of space between things. From distance, it is the hard to tell if someone's wearing the a vampire costume abd just a chic black outfit.
For constructive interference thai is formation of bright fringe through a diffraction grating is given by:
d sin θ = n λ
here, d is the distance between slits.
θ is the angle of diffraction
n is the order of fringe
and λ is the path difference.
λ = (d sin θ)/ n = (0.60 *10 ⁻³m) (sin 0.30°) ÷ 2 = 1.57 * 10⁻⁶ m
Learn more about distance here
https://brainly.com/question/26550516
#SPJ10
Answer:
C is the answer
Explanation:
Samuel pushes against a door with a force of 10N, but the door doesn't move. Has Samuel done work on the door?
No, Samuel hasn't done work, Since the door doesn't move.
What is work done?Work is said to be done when an applied force moves an object over a given distance.
W = Fd
where;
W is work doneF is the applied forced is the distanceSince the door doesn't move, we can conclude that Samuel hasn't done work.
Learn more about work done here: https://brainly.com/question/8119756
#SPJ1
NEED ANSWER ASAP!!!! Tony pulls a luggage cart at an angle of 30° to the horizontal. The luggage cart has a mass of 35 kg, and he pulls with a force of 75 N.
a. What is the normal force on the luggage cart?
b. What force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground?
c. How does your answer in part (b) change as the angle increases?
a)The normal force on the luggage cart will be 305.85 N
b)The force would Tony needs to apply at a 30° angle to pull the luggage cart willl be 375 N.
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and acceleration. Mathematically aion in the different components and balancing the equation gets.Components in the x-direction.
Given data;
The angle of pulling with horizontal. = 30°
Mass of luggage cart=35 kg
Pulling force= 75 N
The force in the y-direction;
N+Fsin30° = mg
N+75 sin 30° = 35 × 9.81
N=305.85 N
The force would Tony need to apply at a 30° angle to pull the luggage cart completely off the ground;
N-mg=Fsin30
Fsin30=75 sin 30
Fsin30=375 N
Hence the normal force on the luggage cart and force would Tony need to apply at a 30° angle to pull the luggage cart willl be 305.85 N and 375 N.
To learn more about the friction force refer to the link;
https://brainly.com/question/1714663
#SPJ1
3. State Newton's first and second laws of equation. A. A body of mass 2kg move vertically upwards has its velocity increased uniformly from 15m/s to 45m/s in 5s. neglecting air resistance, the upward vertical force acting on the body. [g=10ms 2] B. The velocity ratio and efficiency of pulley are 8 and 85% respectively. How much effort is required to lift a load of 120kg with this system [g=10m/s²]
Answer:
See below.
Explanation:
Newton's First Law
A body at rest persists in its state of rest, and a body in motion remains in constant motion along a straight line unless acted upon by an external force.
Newton's Second Law
A body's acceleration is directly proportional to the force exerted on it and is in the same direction as the force. F=mA (Force = Mass x Acceleration)
==============================================
A. A body of mass 2kg move vertically upwards has its velocity increased uniformly from 15m/s to 45m/s in 5s. neglecting air resistance, the upward vertical force acting on the body. [g=10ms 2] B. The velocity ratio and efficiency of pulley are 8 and 85% respectively. How much effort is required to lift a load of 120kg with this system [g=10m/s²]
Force = Mass x Acceleration
Acceleration is (45m/s - 15 m/s)/5 sec) or 6 m/sec^2
Force = 2kg*(6 m/sec^2)
Force = 12 kg*m/s^2 1 kg*m/s^2 is the SI unit for force, and is named 1 Newton(N), after . . . Newton.
Force = 12N
B. I'm not sure how to interpret "The velocity ratio and efficiency of pulley are 8 and 85% respectively." I'll assume "effort" is the energy required.
I'll calculate the energy required in a perfect system, and then we'll consider the efficiency issues.
By lifting an object with mass off the Earth's surface (height = 0 meters) we impart a potential energy, PE, to the object. This energy is stored in the object until it is allowed to move back closer to Earth. This potential energy is given by the equation:
PE = mgh
where PE is potential energy in Joules, m is mass in kg, g is the acceleration due to Earth's gravity (9.8 m/sec^2, but we'll use 10 m/sec^2 as stated in the problem), and h is the vertical distance moved, in meters.
PE = (120kg)(10 m/sec^2)(h). We aren't given a height, h. Let's express the answer in terms of 1 meter: How much potential energy is put into the 120kg load to raise it 1 meter?
PE = (120kg)(10 m/sec^2)(1 m)
PE = 1200 kg*m^2/sec^2 or 1200 kg*m/sec^2 per meter
The unit kg*m/sec^2 is 1 Joule
PE = 1200 Joules/meter
1200 Joules are required to raise 120kg 1 meter. This is increased due to the less-tha-100% efficiency of 85%.
At 85% efficiency, the energy required would be 1200J/0.85 = 1412 J to raise 120kg 1 meter, with 85% efficiency, I don't6 know how to handle the velocity ratio number.
which of the following travels the fastest
Answer:
All move at the same speed
Explanation:
because they are all waves of the electromagnetic spectrum and they all travel at the speed of light
(300 000 km/s)
3. A body accelerates constantly at 4m/s² from rest for a distance of 60m. a) How long did it take to reach a distance of 60m? [2] b) Calculate the velocity reached.
Answer:
will you mark brainliest.
Select the correct location on the image.
Identify the magnetic north pole of Earth’s magnet.
The magnetic north pole of the earth's magnet is in the geographic south pole.
There are two magnetic and geographic poles each, north and southThe two geographic poles are the locations where the earth's axis of rotation passes through which is imaginaryThe magnetic north and south poles are not the same as the geographic north and south polesIn a compass, the needle points to the magnetic north poleBy convention, the magnetic north pole corresponds to the geographic south poleThe magnetic south pole corresponds to the geographic north poleThe magnetic field lines of a magnet start from the magnetic north pole and end at the magnetic south poleThe magnetic north pole of the earth's magnet is the geographic south pole.
Learn more about earth's magnetism here:
https://brainly.com/question/3928159
#SPJ10
