Explanation:
Total surface area of cylinder:
[tex]2\pi \times r(h + r) \\ 2 \times \pi \times 3.5(3.5 + 2) \\ 2\pi \times 19.25 = 120.951317 \\ 120.95 \: {cm}^{2} [/tex]
sheet of metal required = 120.95 cm^2
Explanation:
Answer:
Given :-
A closed cylindrical tank of radius 3.5 m and height 2 m is made from a sheet of metal.
To Find :-
How much sheet of metal is required.
Formula Used :-
[tex]{\red{\boxed{\large{\bold{T.S.A\: of\: cylinder\: =\: 2{\pi}r(r + h)}}}}}[/tex]
where,
r = Radius
h = Height
Solution :-
Given :
Radius = 3.5 m
Height = 2 m
According to the question by using the formula we get,
⇒ [tex]\sf T.S.A =\: 2 \times \dfrac{22}{7} \times 3.5(3.5 + 2)[/tex]
⇒ [tex]\sf T.S.A =\: 2 \times \dfrac{22}{7} \times 3.5(5.5)[/tex]
⇒ [tex]\sf T.S.A =\: 2 \times \dfrac{22}{7} \times 3.5 \times 5.5T.S.A=2×722×3.5×5.5
⇒ \sf T.S.A =\: 2 \times \dfrac{22}{7} \times 19.25[/tex]
⇒ [tex]\sf T.S.A =\: 2 \times 60.5[/tex]
➠ [tex]\sf\bold{\purple{T.S.A =\: 121\: {m}^{2}}}[/tex]
∴ 121 m² of sheet of metal is required.
A .5kg book sits on top of a student's desk which is 9m high. How
much gravitational potential energy does the book have as it sits on the desk?
Answer:
441J
Explanation:
Given parameters:
Mass of book = 5kg
Height = 9m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is given as:
Gravitational potential energy = mass x acceleration due to gravity x height
Gravitational potential energy = 5 x 9.8 x 9 = 441J
Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator. tafu models its position with the function p(t)= t2 t â 1 where t>1. in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. (a) calculate the limit
Answer:
Infinity
Explanation:
When you have a limit approaching infinity one method you can use is to remember that the highest power dominants all of the other ones so when we have (t^2)/t-1 like in your problem, we see that t^2 has the highest power of 2 so if that's going to infinity and it's not being divided by any powers higher than it will just be inifinity.
We have that for the Question, it can be said that in the limit calculations below, if you need to use -â or â, enter -infinity or infinity. the limit is
[tex]Lim_{t->\infty} p(t)= \infty[/tex]
From the question we are told
Tafu is working with subatomic particles in the physics lab. a positron is traveling in a straight line down the particle accelerator.tafu models its position with the function
p(t)= t2 t â 1 where t>1.
in the limit calculations below, if you need to use -â or â, enter -infinity or infinity.
(a) calculate the limit
Generally the equation for the Question is mathematically given as
[tex]p(t)=\frac{t^2}{t-1}\\\\Therefore\\\\For Lim_{\infty}\\\\We have\\\\ Lim_{t->\infty} p(t)= Lim_{t->\infty}\frac{t^2}{t-1}\\\\[/tex]
Since, the equivalent degree of numerator (t^2) is greater than that of the denominator
[tex]Lim_{t->\infty} p(t)= \infty[/tex]
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light waves from the sun can travel trough outer space and reach the earth
Answer:
this is true
Explanation:
An object of mass m is placed on Spring A, which is compressed by distance x. The spring is released and the velocity of the pushed object as it leaves the spring is measured. The experiment is repeated with the same object on Spring B, which is compressed by the same distance x. The object travels faster when pushed by Spring B. What can be concluded?
A .Spring A had a higher elastic potential energy than Spring B.
B. Spring A's spring constant is higher than Spring B's.
C. Spring A's spring constant is lower than Spring B's.
D. Spring A has more mass than Spring B.
Answer:
C
Explanation:
The melting point of a substance is the same as its _____ point.
evaporation
sublimation
freezing
boiling
Answer:
Boiling point
Explanation:
A(n) ________________________ is a molecule that is soluble in both polar and nonpolar solvents.
Answer: ethanol which will dissolve in both water (a polar solvent) and gasoline (a non-polar solvent)
Explanation:
According to the concept of solubility, ethanol is a molecule which is soluble in both polar and non-polar solvents.
What is solubility?
Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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A soccer ball is kicked horizontally and rolled off of a 30 meter high cliff. The soccer ball was kicked with a velocity of 17m/s. How long did it take before the ball hit the ground? How far from the cliff did the ball land? (Make sure to include units.)
VERTICLE
Acceleration =
Distance =
Initial velocity=
Time=
HORIZONTAL
Distance=
Velocity=
Time=
Show your work when solving for time:
Show your work when solving for horizontal distance:
Answer:This will hopefully help. It took me a while so will you mark me brainliest? Thanks!
Explanation:
velocity=Vertical (y) info:
• y = -22.0 m
• viy = 0 m/s
• ay = -9.8 m/s2
distance=
acceleration=
time=
horizontal=Horizontal (x) info:
• x = 35 m
• vix = ?
• ax = 0 m/s2
Initial velocity=16.5 m/s
VOCAB:Horizontal motion is constant
velocity- motion
acceleration-increase in the rate or speed of something.
distance-Distance is a numerical measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). The distance from a point A to a point B is sometimes denoted as. .
time-a point of time as measured in hours and minutes past midnight or noon.
Explanation:
The soccer ball travels a horizontal distance of
33.9 m after being kicked with horizontal velocity of 18.8ms−1. Assuming air resistance is negligible.
Time of flight of the ball
t=Distance Speed=33.918.8s In the vertical direction kinematic equation is
height
h=ut+12gt2 Initial velocity uv=0, acceleration due to gravity g=9.81ms−2. Inserting various values we get h=0×33.918.8+12×9.81×(33.918.8)2⇒h=12×9.81×(33.918.8)2
⇒h=15.9m, rounded to 3 sig. figs
A crate is dragged up a ramp at constant speed. The work done on the system can be accounted for by:
- Eel
-Eg
-Ek
-Eint
-both Eg and Eint
Answer:
The work done on the system can be accounted for by;
Both [tex]E_g[/tex] and [tex]E_{int}[/tex]
Explanation:
The speed of the crate = Constant
Therefore, the acceleration of the crate = 0 m/s²
The net force applied to the crate, [tex]F_{NET}[/tex] = 0
Therefore, the force of with which the crate is pulled = The force resisting the upward motion of the crate
However, we have;
The force resisting the upward motion of the crate = The weight of the crate + The frictional resistance of the ramp due to the surface contact between the ramp and the crate
The work done on the system = The energy to balance the resisting force = The weight of the crate × The height the crate is raised + The heat generated as internal energy to the system
The weight of the crate × The height the crate is raised = Gravitational Potential Energy = [tex]E_g[/tex]
The heat generated as internal energy to the system = [tex]E_{int}[/tex]
Therefore;
The work done on the system = [tex]E_g[/tex] + [tex]E_{int}[/tex].
As a gas or liquid increases in heat, what direction will it naturally move?
Hello!
Answer:
When a gas gets hot it should go up because of the pressure.
Explanation:
Hope this helps!
what are the factors that affect orbital velocity
Answer:
the mass of the central body (earth) and the radius of the orbit affect orbital velocity
Explanation:
The state of matter with particles that are not attracted or tightly packed
and are not arranged in a regular pattern; zoom around to easily change
shape and volume *
a.gas
b.liquid
c.solid
It's none of the above hope this helps
Earth's rotation causes winds to veer to the west or to the east. This is known as the Coriolis effect.
Lesson 1.06
Question 5 options:
True
False
Earth's rotation and spherical shape cause winds to veer to the right (in the northern Hemisphere) or to the left (in the southern Hemisphere) of the direction they want to go. This is known as the Coriolis effect.
If you didn't know that you're on a rotating Earth, and you looked at the patterns of the winds, you'd think there's some kind of force that's making the airflow veer to the right or left of the direction it actually wants to go. This is known as the Coriolis force. It's a"pseudo force", because it doesn't really exist. It only LOOKS like it's there, because of the Earth's rotation and spherical shape..
The statement "Earth's rotation causes winds to veer to the west or to the east" is true about the Coriolis effect.
What is the Coriolis effect?Fluid materials such as wind and ocean currents take different directions depending on the hemisphere, this movement of deviation is called the Coriolis effect.
Characteristics of the Coriolis effectThe Coriolis effect occurs when masses of air or water move along terrestrial meridians, and their trajectory and speed are modified by it.The winds or ocean currents that move along a meridian are diverted by accelerating in the direction of rotation (east) if they go towards the poles or the opposite (west) if they go towards the equator.Therefore, we can conclude that the force that tends to deflect the trajectory of objects moving across the entire earth's surface is known as the Coriolis effect.
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Why are force fields necessary to describe electric force? 0 A. Electric force acts at a distance. O B. Electric force can only attract objects. C. Electric force is a form of gravity. D. Electric force attracts two poles.
Answer:
A. Electric force acts at a distance.
Explanation:
"Electric force," just like gravitational force is a "non-contact force." This means that even at a distance, two objects with no physical contact will create movement with the help of electric force. This leads to the concept of "force fields or field force" that explains why a charge object alters the region surrounding it. Once an object enters the region, it immediately experiences its force. An example of this is holding out one's hand near a "Van de Graaff generator." The electric force compels the hair strands to stand up.
Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes.
Answer:
food chain / web lol? was this a question?
Calculate the momentum of a boat with a mass of 95kg moving at 2m/Ss
Answer:
190 kg m/s
Explanation:
Momentum = Velocity × Mass
→ Substitute in values
2 × 95 = 190 kg m/s
The momentum of the boat of mass 95 Kg moving at 2 m/s will be 190 Kg m/s.
What is Momentum?Momentum is defined as the product of mass of velocity. Momentum is a vector quantity. Mathematically, we can write momentum as -
p = mv
It is also the measure of the impact force imparted by any moving object, when it comes in contact with some other body.
Given is a boat with a mass of 95 Kg moving at 2 m/s.
Mass [m] = 95 Kg
Velocity [v] = 2m/s
We can write the momentum as -
p = mv
Substituting values, we get -
Momentum [p] = 95 x 2 = 190 Kg m/s
p = 190 Kg m/s
Therefore, the momentum of the boat of mass 95 Kg moving at 2 m/s will be 190 Kg m/s.
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When a government pays ranchers to reduce the number of milk cows they have, it is known as a what ?
O Subsidy
O Tax Break
O Productivity Schedule
O Resource Cost
I say a subsidy because the government is controlling how many cows they have.
Answer:
Subsidy
Explanation:
When a government pays ranchers to reduce the number of milk cows they have, it is known as a subsidy.
Subsidy is an incentive given by a government in form of cash or raw materials in order to achieve a common goal.
It might be to increase production of certain commodities or phase out a particular product in the market.
The subsidy helps in paying part of the production costs
A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m?
Answer:
8) A hanging 7.5 kg object stretches a spring 1.1 m. What is the spring constant? 1 . 1 66. 82 NIMO 9) A spring has a constant of 875 N/m. What hanging mass will cause this spring to stretch 4.5 m? Iouliply then divide 875 X 4. 2- - (4 04. 7919) 10) A spring with a spring constant of 25 N/m is stretched 65 cm. What was the force used? 11) A 25 N force stretches a spring 280 cm. What was the spring constant? 12) A 75 N force stretches a spring 175 cm. What was the proportionality constant? 8) 66.82 N/m 9) 401.79 kg 10) 16.25 N 11) 8.93 N/m 12) 42.86 N/m
Explanation:
A spring has a constant of 875 N/m. and the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.
What is Spring constant?The spring constant is a characteristic of a spring which is defined as the ratio of the force affecting the spring to the displacement which is caused by that force. The SI unit of spring constant is N.m⁻¹ (Newton per meter).
The spring constant is:
F = -k/ x
where, k is the spring constant
F denotes the force,
and x denotes the change in the length of the spring.
k = 875N/m
x = 4.5m
We know that
Kx = mg
m= kx/ g
m = 875 × 4.5/ 9.8
m = 401.78kg
Therefore, the mass which will cause this spring to stretch 4.5 meters is 401.78 kg.
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The specific heat capacity of iron is 450.5. A 15.5 kg block of iron with
an initial temperature of 20 degrees Celsius is heated with 250 J. What will
the final temperature of the iron be?
Answer:
[tex]T_f=20.03^{\circ} C[/tex]
Explanation:
Given that,
The specific heat capacity of iron is 450.5 J/g°C
The mass of block of iron, m = 15.5 kg
Initial temperature, [tex]T_i=20^{\circ} C[/tex]
Heat required, Q = 250 J
We need to find the final temperature of the iron. The formula for heat required is given by :
[tex]Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\\dfrac{Q}{mc}=(T_f-T_i)\\\\T_f=\dfrac{Q}{mc}+T_i\\\\T_f=\dfrac{250}{15.5(450.5)}+20\\\\T_f=20.03^{\circ} C[/tex]
So, the final temperature of the iron is [tex]20.03^{\circ} C[/tex].
The ultrasound is reflected from the seafloor back to the submarine.
Use the correct answers below to complete the sentence.
A. Half
B. The same as
C. Twice
The total distance the ultrasound pulse travelled is......... the distance to the sea floor.
Answer: c
Explanation:
The total distance the ultrasound pulse travelled is, twice the distance of the sea floor
Because it went back and forth
please answer and fast i am in a test
Answer:
Online means connected to a network.
Credible means reliable or trustworthy
Cite means to quote from an article or book.
Match each chemical name with the correct chemical formula.
Here are the formula choices:
A. S7O2
B. SO4
C. SO3
D. SO
E. S6O5
A suitcase with a mass of kg 2 has a weight of 18n on a particular planet. What is the acceleration due to gravity on that planet
Answer:
[tex]9\ \text{m/s}^2[/tex]
Explanation:
m = Mass of the object = 2 kg
W = Weight of the object = 18 N
g = Acceleration due to gravity
Weight of the an object is given by
[tex]W=mg[/tex]
[tex]\Rightarrow g=\dfrac{W}{m}[/tex]
[tex]\Rightarrow g=\dfrac{18}{2}[/tex]
[tex]\Rightarrow g=9\ \text{m/s}^2[/tex]
The acceleration due to gravity on that planet is [tex]9\ \text{m/s}^2[/tex].
Find the mass and show all the work please and show the answer. Thank you.
Answer:
75 kg.
Explanation:
From the question given above, the following data were obtained:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
Kinetic energy (KE), mass (m) and velocity (v) of an object are related according to the following equation:
KE = ½mv²
With the above formula, we can obtain the mass of the object as illustrated below:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
KE = ½mv²
937.5 = ½ × m × 5²
937.5 = ½ × m × 25
937.5 = m × 12.5
Divide both side by 12.5
m = 937.5 / 12.5
m = 75 Kg
Therefore, the mass of the object is 75 Kg.
A force of 6.0 Newton’s is applied to a block at rest on a horizontal frictionless surface over a 7.0 meter span. How much energy is gained by the block.
Answer:
42J
Explanation:
Given parameters:
Force applied = 6N
Distance moved = 7m
Unknown:
Amount of energy gained by the block = ?
Solution:
The amount of energy gained by the block is the same as the work done on the block.
The work done is the force applied to move the block through a distance;
Energy gained = force x distance = 6 x 7 = 42J
How Does Exercise Treat Depression?
Answer:
It can help take your mind off of it. and help you get outside and in the world.
Explanation:
2.
A hydraulic jack raises a car of 250 N weight to a height of 5.8 m in 5.0 s. The jack does work at a rate of
290 W
216 W
275 W
250 W
How does an electrical field change when it interacts with an opposing field
Answer:
The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. ... If it is moving in the opposite direction it will decelerate. If a negative charge is moving in the same direction as the electric field vector the particle will decelerate.
PLEASE HELP ME I AM BEGGING YOU :)) 15 POINTS
A student investigated the energy being transferred using the
joulemeter (J).
The reading on the joulemeter was always 20 J lower than the
calculated value.
Name the type of error in the investigation
In handball, who is the only player allowed in the goalie area?
Answer:
Only the goalie is allowed inside the goal crease. The only exception when another player is allowed in the goal area is when they take off from outside the goal area, and shoots or passes the ball before landing. To avoid interference with other players, the player must then exit the goal area as soon as possible.
Explanation:
when a chemical reaction occurs, chemical bonds ______ break and new chemical bonds form to create the __________
Answer:
a) reactant
b) product
Explanation:
During a chemical reaction, the reactants interact among themselves in a specific temperature, pressure, pH, enzyme etc. Due to various intra and inter molecular and atomic interactions, the chemical bonds in the reactants break down. Formation of new chemical product is governed by the formation of new bond (ionic, covalent, hydrogen vander waal etc. )