The amount of heat transferred to the wooden beam if it has mass 60kg is 70800 J
What is amount?Amount is a mathematical concept that refers to the quantity or size of something. It can be used to describe a numerical value, such as a monetary amount, a quantity of units of measurement, or a count of items. Amounts can also be expressed in terms of fractions, decimals, or percentages. In everyday use, it is often used to refer to the total sum of money, goods, or services involved in a transaction. For example, when discussing a purchase, one might say "the amount was $25." Amount is also used in a more general sense, to refer to a large quantity or number of something. For example, one might say "there was a huge amount of people at the event."
Heat transferred (Q) = mass (m) x specific heat capacity (c) x change in temperature (ΔT)
Q = 60 kg x 0.84 J/g°C x (35°C - 15°C)
Q = 70800 J
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Which of these is an appropriate treatment for a deep, bleeding wound?
A. Walk the person around.
B. Remove any embedded object.
C. Elevate the wound.
D. Apply a tourniquet.
Answer:
Elevate the wound.
Hope this helped!
A cyclist, using a power meter while on a training ride, checks and sees that she is doing work at the rate of 500 W. How much average force does her foot exert on the pedals when she is traveling at 8.0 m/s
The cyclist's foot exerts an average force of 62.5 N on the pedals while traveling at 8.0 m/s.
The formula for power, which is \(Power = \frac{ Work}{Time}\). In this case, the cyclist is doing work at the rate of 500 W, so we can rearrange the formula to solve for work: Work = Power x Time.
To find the time, we can use the formula for velocity, which is\(Velocity =\frac{Distance}{Time}\). Rearranging this formula gives us \(Time =\frac{Distance}{Velocity}\).
Assuming the cyclist is traveling at a constant velocity, we can use this formula to find the time it takes for her to cover a distance of 1 meter (since we are trying to find the force per meter of travel).
\(Time = \frac{1 meter}{8.0 m/s }\)
= 0.125 seconds.
Now we can plug in the values we have into the formula for work:
Work = 500 W x 0.125 s
= 62.5 J.
The average force can be found by using the formula for force, which is \(Force =\frac{ Work}{Distance}\). In this case, we want to find the force per meter of travel, so we can use Distance = 1 meter.
Thus, Force = 62.5 J / 1 meter
= 62.5 N.
The cyclist's foot exerts an average force of 62.5 N on the pedals while traveling at 8.0 m/s.
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Recent observations seem to indicate that, rather than being a spiral galaxy, the Milky Way may be
Select one:
a. a barred spiral with a definite, straight bar across its center.
b. an irregular galaxy with chaotic distribution of matter within it.
c. an elliptical galaxy with little structure.
d. two elliptical galaxies colliding with each other, in view of the very active star formation within the galactic plane, brought about by the vastly increased density during the collision.
According to recent observations, it has been suggested that the Milky Way may be a) a barred spiral galaxy, which with a definite, straight bar across its center. This is different from a regular spiral galaxy, which has a central bulge and spiral arms extending from it.
The evidence for the Milky Way being a barred spiral galaxy comes from observations of stars and gas in the galaxy. For example, infrared observations from the Spitzer Space Telescope have revealed a prominent bar-shaped structure in the center of the Milky Way. In addition, observations of the motions of stars and gas in the galaxy suggest the presence of a bar, as the motions are consistent with the gravitational effects of a bar-shaped structure.
It is worth noting that there is still some debate among astronomers about the exact structure of the Milky Way. Some have suggested that it may be an irregular galaxy, with a chaotic distribution of matter within it. Others have proposed that it may be an elliptical galaxy, with little structure. However, these theories do not have as much supporting evidence as the idea of the Milky Way being a barred spiral galaxy.
In summary, recent observations suggest that the Milky Way may be a barred spiral galaxy.
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3. A Gas has a volume of 35 Liters at 10 atm pressure. To expand the volume to 80 Liters, what will the pressure be?
4. A Gas has a volume of 85 Liters at 20 Celsius. What will its volume be in liters at 80 Celsius?
5. Gas has a volume of 600 mL at 29 Celsius. As the volume changes to 900 mL, what is the new temperature in Celsius?
Answer:
3) using Robert Boyles's law the pressure will be 4.375 atm
4) using Charle's law the volume will be 340 Liters
5) using Charle's law the new temprature will be 43.5 °C
Why do scientists track the energy in a system?
The supply of energy and of each needed chemical element restricts a system operation -- for example , without inputs of energy ( sunlight ) and matter ( carbon dioxide and water ) , a plant cannot grow. Hence , it is very informative to track the transfers of matter and energy within , into , or out of any system under study.
Hope it helps
Scientists track the energy in a system for analyzing and comparison of the efficiencies of the different systems, to know whether one system has some advantage over another
What is thermal energy?Thermal energy also referred to as heat energy, can be described as the type of energy in which heat is transmitted from one body to another body as a result of its molecular movements.
The accepted unit for calculating energy is the joule (J). The unit of measurement for electric energy known as the kilowatt-hour (kWh) should be mentioned among the most popular ones (in fact it is used to calculate electricity bills). The Terawatt/hour (TWh), or one billion kW/h, is used to determine a large power plant's production or a nation's consumption.
Thus, To analyze and compare the efficiencies of various systems and determine whether one system has an advantage over another, scientists monitor the energy in a system.
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Increasing the amplitude by a factor of ______ doubles the energy of a simple harmonic oscillator
Increasing the amplitude by a factor of four times doubles the energy of a simple harmonic oscillator.
The amplitude of a periodic variable is a measure of its change in a single period. The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values.
Simple harmonic oscillator is an oscillator that is neither driven nor damped. It consists of a mass m, which experiences a single force F, which pulls the mass in the direction of the point x = 0 and depends only on the position x of the mass and a constant k.
A specific example of a simple harmonic oscillator is the vibration of a mass attached to a vertical spring, the other end of which is fixed in a ceiling.
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Geologists use tools other than the law of superposition to help them with relative dating. Which statements describe those tools? Check all that apply.
Answer: Cross-cutting features are always younger than the surrounding rock.
When material erodes before sediment is deposited on it, a geologic gap results.
Explanation:
The options include:
1. An unconformity is created when lava pours out on Earth’s surface.
2. Faults are the result of volcanic activity.
3. Intrusions and extrusions are sedimentary formations.
4. Cross-cutting features are always younger than the surrounding rock.
5. When material erodes before sediment is deposited on it, a geologic gap results.
The law of superposition simply states that when there is a layers of rocks, we would see that the younger layers will lie and be on top of the layers that are older.
Other tools that can help scientist with relative dating are:
• Cross-cutting features are always younger than the surrounding rock.
• When material erodes before sediment is deposited on it, a geologic gap results.
Explanation:
It's on Edge
PLS ANSWER ASAP
A golf ball travels upwards and rightward through the air. Of the forces listed, identify which act upon the golf ball.
a) normal force
b) tension
c) gravity
d) applied
e) air resistance
f) friction
Answer:
Gravity, normal force, friction, and air resistance.
Explanation:
Assuming the ball is on earth, there is always gravity acted upon the object.
Since the problem said that the golf ball is moving throughout the air, we can tell that there will be air resistance and friction(air resistance is a type of friction). There is also normal force pushing on the ball as it bumps into the air, as the air is pushing back with an equal and opposite force.
I don't know what you mean by "applied", so I don't think there's that type of force exerted on the ball.
Lastly, tension only occurs when you pull a string/rope. There is no string/rope in this case, so there is no tension exerted on the ball.
I hope this helped you.
The force acting upon the golf ball which is traveling upward and rightward through the air is gravity, normal, friction, and air resistance, so options A, C, E, and F are correct.
What is friction?A force that prevents two solid objects from smoothly sliding or rolling over one another is known as friction. Despite the potential benefits of frictional forces, such as the traction needed to walk without slipping, they can still present a sizable amount of resistance to motion. Automobile engines use about 20% of their output to overcome frictional forces in moving parts.
The ball will always be affected by gravity if it is on earth. We can infer that there will be air resistance and friction because the issue said that the golf ball is traveling through the air (air resistance is a type of friction).
The air is pushing back on the ball with an equal and opposite force when it bumps into it, adding to the regular force that is pushing on it. Finally, tension can only be created by pulling a string or rope. Since there is no string or rope present, the ball is not under any tension.
Therefore, the force acting upon the golf ball which is traveling upward and rightward through the air is gravity, normal, friction, and air resistance.
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which movement straightens a joint, returning it to zero position?
Movement refers to the way people walk, run, or perform other physical activities. The process of changing body place or direction is referred to as movement. The motion of a body segment, such as a limb, is referred to as a movement.
The movement that straightens a joint, returning it to zero position is an extension. The zero position refers to the default, resting position of a joint before any motion occurs. In this position, the joint's anatomical structure is in its most stable and neutral position, allowing for optimal force generation and movement. The extension is the movement of a joint that straightens or opens the angle between the bones or parts of the body. For example, extension is when you move your forearm from a bent position to a straight position. So, extension is the movement that straightens a joint, returning it to zero position. Hence, the answer is an extension.
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. A car starts to move from rest has an acceleration of 3m/s².what will be the velocity and distance travelled by the car after 50sec.
Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :
Step 1: Calculate the velocity using the equation:
\(v = u + at\)
where:
- \(v\) is the final velocity
- \(u\) is the initial velocity (0 m/s, as the car starts from rest)
- \(a\) is the acceleration (3 m/s²)
- \(t\) is the time (50 seconds)
Substituting the values into the equation:
\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)
Step 2: Calculate the distance traveled using the equation:
\(s = ut + \frac{1}{2}at^2\)
where:
- \(s\) is the distance traveled
- \(u\) is the initial velocity (0 m/s)
- \(a\) is the acceleration (3 m/s²)
- \(t\) is the time (50 seconds)
Substituting the values into the equation:
\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)
Now, let's simplify these equations:
\(v = 3 \times 50\)
\(s = \frac{1}{2} \times 3 \times 50^2\)
Calculating the results:
\(v = 150\) m/s
\(s = 3750\) meters
Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.
what makes the gravity of a black hole so strong
Answer:
matter has been squeezed into a tiny space.Explanation:A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because This can happen when a star is dying. Because no light can get out, people can't see black holes.problem 4.5) a certain mass-spring system oscillates with an amplitude of 5mm when the forcing frequency is 20 hz, and with an amplitude of 1mm when the forcing frequency is 40 hz. estimate the frequency of the system (remember: 1hz
To estimate the frequency of the mass-spring system, we can use the concept of resonance.
Resonance occurs when the driving frequency matches the natural frequency of the system, resulting in maximum amplitude.
Given that the amplitude is 5 mm when the forcing frequency is 20 Hz, and the amplitude is 1 mm when the forcing frequency is 40 Hz, we can determine the frequency at which the system reaches its maximum amplitude.
The ratio of the forcing frequencies is the same as the ratio of the amplitudes:
(40 Hz) / (20 Hz) = (1 mm) / (5 mm)
Simplifying the equation:
2 = (1 mm) / (5 mm)
Now, let's find the reciprocal of 2:1/2 = (5 mm) / (1 mm)
Therefore, the reciprocal of the ratio of frequencies is equal to the ratio of amplitudes. The reciprocal of 2 is 1/2, which means the frequency of the system when it reaches its maximum amplitude is 1/2 of the forcing frequency.
Hence, the estimated frequency of the system would be:(20 Hz) * (1/2) = 10 Hz
Therefore, the estimated frequency of the mass-spring system is 10 Hz.
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What is equilibrium?
Answer:
Balance is the ability to maintain body balance when placed in various positions.
----------------------------------------
\( \green{ \boxed{ \boxed{ \sf{Lusi \: Adriana} } } } \)
Hope it is Useful..Answer:
A state of physical balance.
I hope this helps you!!!
A person is riding a bicycle, and its wheels have an angular velocity of 19. 4 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 14. 6 revolutions.
(a) How much time does it take for the bike to come to rest?
(b) What is the anguar acceleration (in rad/s2) of each wheel?
The answer for A. It takes approximately 15.15 seconds for the bike to come to rest and for B. The angular acceleration of each wheel is approximately -1.28 rad/s². The negative sign indicates deceleration or braking.
A. To find the time it takes for the bike to come to a rest, we can use the relationship between angular displacement (θ), angular velocity (ω), and time (t):
θ = ωt
Given that the angular displacement of each wheel is 14.6 revolutions, we need to convert it to radians:
θ = 14.6 revolutions * 2π radians/revolution
θ = 14.6 * 2π radians
Now, we can rearrange the formula to solve for time:
t = θ / ω
t = (14.6 * 2π radians) / 19.4 rad/s
Simplifying the expression:
t ≈ 15.15 seconds
Therefore, it takes approximately 15.15 seconds for the bike to come to rest.
B. To find the angular acceleration (α) of each wheel, we can use the formula:
α = ωf - ωi / t
Since the bike comes to a uniform stop, the final angular velocity (ωf) is 0 rad/s. The initial angular velocity (ωi) is given as 19.4 rad/s, and the time (t) is 15.15 seconds.
α = (0 - 19.4 rad/s) / 15.15 s
Simplifying the expression:
α ≈ -1.28 rad/s²
Therefore, the angular acceleration of each wheel is approximately -1.28 rad/s². The negative sign indicates deceleration or braking.
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2.) A rock is kicked off a 5m high cliff. The rock lands 7m from the base of the cliff. With what velocity was the rock initially kicked?
The velocity with which the rock initially kicked if the cliff is 5 m high and the rock lands 7m from the base of the cliff is 6.93 m / s
s = ut + 1 / 2 at²
s = Distance
u = Initial velocity
t = Time
a = Acceleration
In vertical motion,
s = 5 m
u = 0
a = 9.8 m / s²
5 = 0 + ( 1 / 2 * 9.8 * t² )
t² = 1.02
t = 1.01 s
In horizontal motion,
s = 7 m
a = 0 ( Since velocity is constant )
7 = 1.01 u + 0
u = 7 / 1.01
u = 6.93 m / s
Therefore, the velocity with which the rock initially kicked is 6.93 m / s
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several Non-Examples of mechanical weathering are?
Answer:
The removal of rock particles by wind, water, ice, or gravity,mining, carving, carving
Explanation:
suppose that the internal energy of a system has been increased, resulting in an increase in the temperature of the system. which of the following is the cause of this change?
No, according to the first law, whether a certain amount of energy is added by doing work on the system or by adding heat, the internal energy will change in the same way.
A thermodynamic system's total internal energy is defined as the energy it possesses. It consists of both internal kinetic energy and potential energy contributions, and it is the energy required to develop or prepare the system in its current internal condition. The system's energy gains and losses resulting from modifications to its internal state are tracked by this mechanism. It excludes all external energies from surrounding force fields as well as the kinetic energy of the system's overall motion. The first law of thermodynamics, which is based on the idea that an isolated system's internal energy is constant, is stated as the law of conservation of energy. An vast quality is the internal energy.
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At what temperature will the Kelvin scale reading be double the Fahrenheit scale reading?
a) 250K
b) 353.4K
c)500K
d)30.5k
please show with steps :'(
Answer:
The temperature at which the Kelvin scale reading is double the Fahrenheit reading is 176.69 F = 353.38 K
Explanation:
K = 2F
→ 2F = 273 + (5/9)(F - 32)
→ 18F = 2457 + 5F - 160
→ 18F - 5F = 2457 - 160
→ 13F = 2297
→ F = 2297/13
→ F = 176.69° F
K = 2F
→K = 2 * 176.69
→ K = 353.38K
water flows through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s. the density of water is 1 000 kg/m3. determine its average velocity. multiple choice question. 20 m/s 200 m/s 0.02 m/s 2 m/s 0.2 m/s
Option D: 2 m/s is the average velocity of the water flowing through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s.
According to the question:
cross-sectional area of the pipe = 0.002m²
Mass flowrate = 4 kg/s
Density of water = 1000 kg/m³
We are asked to find, average velocity =?
Average velocity is the net or total displacement covered by a body in a given time. The mass flow rate divided by the pipe's cross-sectional area and density ratio is the formula for calculating a fluid's average velocity.
As a result, the water's average flow rate through the pipe is provided by:
v = m / (ρ × A)
where, v is the average velocity, m is the mass flow rate, ρ is the density of water, and A is the cross-sectional area of the pipe. Substituting the values in the above equation we get:
v = 4 / (1000 × 0.002)
v = 2m/s
Therefore, the average velocity of water flowing through a pipe of cross-sectional area of 0.002m² is 2m/s.
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Correct question is:
Water flows through a pipe with a cross-sectional area of 0.002 m2 at a mass flow rate of 4 kg/s. The density of water is 1 000 kg/m3. Determine its average velocity. Multiple choice question.
20 m/s
200 m/s
0.02 m/s
2 m/s
0.2 m/s
If today is October 31st and we view a third quarter, on what date did we observe
the last new moon?
If it's October 31 and we can see a third quarter, then means we can see the last new moon, which was on October 10.
What does the moon mean?The Moon, the largest and brightest satellite in our night sky, stabilizes the Earth's axial wobble, which results in a generally constant climate. This makes Earth a rather more livable planet. Moreover, it brings about tides, which produce a pattern that has aided people for countless years.
How is the moon made?Approximately 43% of the moon's surface is made up of oxygen, 20% of it is silicon, 19% is magnesium, 10% is iron, 3% is calcium, 3% is aluminum, 0.42% is chromium, 0.18% is titanium, and 0.12% is manganese. Traces of water that may have come from far beneath have been discovered by orbiting spacecraft on the lunar surface.
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Why do water molecules tend to stay together and hold their shape? Name and explain the phenomenon by which this happens
Answer:
because liquid and solid states of water possesses intermolecular force of attraction which held the molecules of water in fixed
The pulse of sound hits a stationary object and is reflected back to the bat. The pulse is received by the bat 0.12s after it was emitted. Calculate the distance travelled by the pulse of sound during this time.
Answer:
41.52 m
Explanation:
Using,
v = d/t....................... Equation 1
v = speed of pulse of sound, d = distance travelled by the pulse of sound, t = total time taken.
From equation 1, make d the subject of the equation
d = vt............................ Equation 2
Given: t = 0.12 s.
Constant: v = 346 m/s
Susbtitute these values into equation 2
d = 346(0.12)
d = 41.52 m
PLS HELP I NEED THIS BY TONIGHT PLS
Answer:
GET GOOD
Explanation:
Which term is the rate at which work is done? a. energy b. powerc. joulesd. force
Answer:
power
power is the rate of doing work. It is equivalent to an amount of energy consumed per unit time. In the SI system, the unit of power is the joule per second (J/s).
If a 25 kg object is moving at a velocity of 5 m/s, the object has energy
Answer:
Since the KE is proportional to velocity squared, if you increase the KE by a factor of
2
, you increase
v
by a factor of
2
2
=
4
Detailed explanation :
25
=
0.5
⋅
m
⋅
(
5
2
)
Find
m
:
25
=
25
m
2
m
=
2
Hence the new KE:
KE
=
0.5
⋅
2
⋅
10
2
KE
=
100
J
A circuit has a resistance of 4.0 Ohms. What voltage will produce a current of 1.4 Amps in the circuit
Answer:
5.6 volts
Explanation:
According to Ohm's Law, V = IR
where V = voltage, I = Current and R = resistance
A stationary 25 kg object is located on a table near the surface of the earth. The coefficient of static friction between the surfaces is 0.50 and of kinetic friction is 0.30. A horizontal force of 300 N is applied to the object. Determine the acceleration of the object. *
The net vertical force on the object is
∑ F[vertical] = n - mg = 0
where n is the magnitude of the normal force exerted by the surface, m is the object's mass, and g is the mag. of acceleration due to gravity. It follows that
n = mg = (25 kg) (9.8 m/s²) = 245 N
The net horizontal force is
∑ F[horizontal] = 300 N - f = ma
where f is the mag. of friction and a is the object's acceleration.
We have
f = µn
where µ is the coefficient of friction. Since the object starts at rest, it won't move and accelerate unless the applied force of 300 N is sufficient to overcome the maximum static friction, which is
f = 0.50 n = 0.50 (245 N) = 122.5 N
Since f < 300 N, the box will begin to slide, at which point the coefficient of kinetic friction kicks in and the mag. of friction is
f = 0.30 n = 0.30 (245 N) = 73.5 N
Now solve for a :
300 N - 73.5 N = (25 kg) a
a = (226.5 N) / (25 kg)
a = 9.06 m/s² ≈ 9.1 m/s²
A solution which has a solid solute is saturated at 25°C. It is then heated to 35°C. There is no change in the appearance of the solution. What term would now be associated with this solution?
A.
unsaturated
B.
saturated
C.
oversaturated
D.
supersaturated
Answer:
C. oversaturated
Explanation:
Sana nakatulong
The passage helps the reader to draw conclusions about which character's perspective? ºAlec ºAlice ºAlec's father ºAlec's mother
Answer:
I think it might be A: Alec but tell me if I'm wrong
Explanation:
Answer:
a
Explanation:
i did it on e d g e n u i t y
In 1996 Eddie Cheever recorded the fastest lap ever at the Indianapolis 500. His car completed one lap (4023 meters) in a record time of 38.1 seconds. What was Eddie’s average speed during this lap?
The average speed of Eddie during this lap will be 106 m/s. Thus, the correct option is B.
What is Average speed?The average speed is the total distance traveled by an object in a particular time interval. The average speed is a scalar quantity. It is because average speed has only the magnitude and does not have direction.
Average speed = Total Distance traveled/Total Time taken
Total Distance = 4023 m,
Total Time = 38.1 seconds
Average speed = 4023/ 38.1
Average speed = 105.59 m/s ≈ 106 m/s
Therefore, the correct option is B.
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Your question is incomplete, most probably the complete question is:
In 1996 Eddie Cheever recorded the fastest lap ever at the Indianapolis 500. His car completed one lap (4023 meters) in a record time of 38.1 seconds. What was Eddie’s average velocity during this lap?
A) 0 m/s
B) 106 m/s
C) 9.00 x 10-3 m/s
D) 1.53 x 105 m/s