Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature)
Additionally, we are provided the iron's particular heat as well as the iron skillet's mask.
We must determine the required quantity of heat based on this information. It will be Q = c x mass x delta P using this method.
That is the temperature change. Therefore, we can replace the value here. The c represents the iron's particular temperature. That comes to 0.4499.
The supplied mass is 5.07, and the resulting temperature change will be 250 - 25 °C. If we can solve this, we can determine what Q is worth.
Alternately, we might state that the required amount of heat is 512.19 Joules.
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How long (in years) can a battery that can supply 8.30e4 J run a pocket calculator that consumes energy at the rate of 1.10e-3 W?
Answer:
1 J = 1 W-sec
8.30E4 J / 1.10E-3 J/s = 7.58E7 sec
1 year = 365 d * 24 h/d * 3600 sec/hr = 3.15E7 sec
T = 7.58E7 sec / 3.15E7 sec / yr = 2.40 yrs
Each of the following equations was given by a student during an examination. Do a dimensional analysis of each equation and explain why the equation can't be correct.(a) 1/2 mv2 = 1/2mv02 + √mgh
The dimensional analysis of the given equation is solved as
[tex]\begin{gathered} \frac{1}{2}mv^2=\frac{1}{2}mv^2_0+\sqrt[]{mgh} \\ \lbrack M^1L^2T^{-2}\rbrack=\lbrack ML^2T^{-2}\rbrack+\lbrack M^1L^2T^{-2}\rbrack^{\frac{1}{2}} \\ \lbrack M^1L^2T^{-2}\rbrack=\lbrack M^{\frac{3}{2}}L^3T^{-3}\rbrack \end{gathered}[/tex]As the left-hand side of the dimension is not equal to the right-hand side of the dimension.
Hence, it is dimensionally incorrect.
Many people have different ideas about what causes us to see different parts of the Moon. Which idea below best matches your thinking and explain your thinking
A. Earth casts a shadow on the Moon that allows us to see only the lit part of the Moon.
B.The Moon moves into the Sun's shadow, blocking out part of the Moon's light.
C.The part of the Moon we see depends on where the Moon is in relation to Earth and the Sun.
D.The Sun's movement around Earth causes different parts of the Moon to be reflected.
E.The Moon's rotation causes different parts of the Moon to be reflected back to Earth.
F.None of these. I think there is something else that causes us to see different moon phases.
The part of the Moon we see depends on where the Moon is in relation to Earth and the Sun.
What is the phases of moon ?Earth revolves around the Sun, while the moon revolves around the Earth. However, there are four primary moon phases; we also refer to them as the lunar phases. First Quarter, Full Moon, Last Quarter, and last but not least, The New Moon, are the four phases.
Any of the numerous Moon shapes created by the Sun's illumination of the lunar disc, as seen from Earth. There are eight phases that the Moon goes through: new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter, and waning crescent.Learn more about Phases of moon here:
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A line passes through (1,-5) and (-3,7). What is the slope of the line?
Given:
The coordinate of the points are,
[tex]\begin{gathered} (x_1,y_1)=(1,-5)_{} \\ (x_2,y_2)=(-3,7) \end{gathered}[/tex]The slope is,
[tex]\begin{gathered} m=\frac{y_2-y_1}{x_2-x_1} \\ =\frac{7-(-5)}{-3-1} \\ =\frac{12}{-4} \\ =-3 \end{gathered}[/tex]Hence, the slope is -3.
From the law of universal gravitation, the following gravitational forces have been calculated.
Earth and Large Ball 0.882 N
Earth and Small Ball 0.049 N
Large Ball and Feather 2.41 10-14 N
Large Ball and Small Ball ?
____________
Use the formula for the law of universal gravitation to calculate the gravitational force between the large ball and the small ball. Assume the distance between them is 0.5 m.
The mass of the objects
Small Ball = 5.0 10-3 kg
Large Ball = 9.0 10-2 kg
Feather = 1.0 10-3 kg
The gravitational force between the large ball and the small ball is 1.2×10⁻¹³ N
How to determine the gravitational forceThe gravitational force between the large ball and the small ball can be obtained as illustrated below:
Mass of larger ball (M₁) = 9.0×10⁻² KgMass of small ball (M₂) = 5.0×10⁻³ KgDistance apart (r) = 0.5 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Gravitational force (F) =?F = GM₁M₂ / r²
F = (6.67×10¯¹¹ × 9.0×10⁻² × 5.0×10⁻³) / (0.5)²
F = 1.2×10⁻¹³ N
Thus, from the above calculation, we can conclude that the gravitational force is 1.2×10⁻¹³ N
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What is the direction of the resultant. ASAPP
Answer:The direction of the resultant can be determined by finding the angle that the resultant makes with either the north-south or the east-west vector. The diagram at the right shows the angle theta (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.
Explanation: Because i said
7. Which of the following is the function of the step-up transformer?A. Decreases the currentB. Decreases the transmission voltageC. Increases the currentD. Increases the transmission voltage
The function of a step-up transformer is to convert low voltage to High voltage.
D. Increases the transmission voltage
When a planet orbits the Sun in (nearly) a
circle...
A. gravity pushes it away from the Sun.
B. a centripetal force pulls it toward the Sun.
C. a centrifugal force pushes it away from the Sun.
D. inertia pulls it in toward the Sun.
When a planet orbits the Sun in a circle a centripetal force pulls it toward the Sun.
What is centripetal force?As an object travels in a circular path, it encounters a force known as centripetal force. .This force is directed towards the center of the circle and is essential to maintain the circular motion of the object. Without it, the object would move off in a straight line and not continue in its circular path.
What happens when a planet orbits the Sun in a circle?When an object moves in a circular path, it experiences a force known as centripetal force. This force pulls the object towards the center of the circle. For instance, when a planet orbits around the Sun, gravity acts as the centripetal force that keeps it moving along its circular path. The gravitational pull between the Sun and the planet continuously directs it towards the center of its orbit and prevents it from wandering off into space or escaping from the Sun's gravitational field.
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There are 118 recognized pure substances that cannot be broken down into more simpler substances these are 118 substances are called
The substances that can't be broken into simpler substances are called "elements", and their properties are found in the periodic table of elements. Therefore, H is the right answer.
Imagine you are a teacher and you are introducing your 10th-graders to an important national test. As you open a bag of chips and check your phone for text messages, you explain that staying focused and double-checking answers is key, as that test may determine their post-graduation options. If your students do not pay attention to the material, it is probably because:
If your students do not pay attention to the material it is probably because you are delivering a mixed message.
National Examination means a test used by the Board to determine a candidate's ability for licensure administered by the NAB or other Board-approved examination. These provide a basis for examining candidates for selection to higher education levels such as B. For upper secondary or higher education and employment.
Federal law prohibits companies from producing these documents without a court order or subpoena. SMS recordings must be obtained from the party's wireless service provider. An attorney can obtain a court order or subpoena to obtain records directly from her provider of services. On your computer, open Messages for Web in a browser such as Chrome or Safari. After signing in go to settings and turn on Remember this device.
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How do you do circuit 7 of Q2, the current in each arm of the circuit?
ANSWER:
55Ω
I = 0.22 amp
STEP-BY-STEP EXPLANATION:
We are divided into two parts, the first is to solve the parallel system, like this:
[tex]\begin{gathered} \frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2} \\ \text{ replacing:} \\ \frac{1}{R_T}=\frac{1}{10}+\frac{1}{10} \\ R_T=\frac{100}{10+10}=\frac{100}{20}=5\Omega \end{gathered}[/tex]Then we have a series system, therefore, we solve like this:
[tex]R_T=5+50=55\Omega[/tex]The first thing is to calculate the current, knowing that the voltage is equal to 12V, like this:
[tex]\begin{gathered} I=\frac{V}{R}=\frac{12}{55} \\ I=0.22\text{ amp} \end{gathered}[/tex]Consider the following question:
How does changing the drop height affect the speed of a ball rolling down a hill?
What is the dependent variable?
A Drop height
B Speed of the ball
C Size of the hill
D Mass of the ball
Which of these cannot be done by a machine?
multiply force
multiply energy
change direction of a force
work
multiply energy of these cannot be done by a machine.
What kind of machine is it?The inclined plane, the wedge, the screw, the lever, the wheel and axle, and the pulley are six examples of primitive machines. Although several may function in a similar manner, these six have distinctive qualities and perform distinctive tasks.
A machine's role may be as simple as modifying and transmitting forces and motions, or it may include converting chemical, thermal, electrical, or nuclear energy into mechanical energy or vice versa. Every machine has an input, an output, as well as a device for altering, changing, and conveying information.
Any tool that simplifies work by adjusting a force is a machine. Machines may broaden the area over which a force is delivered or enhance the force's power.
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two large boxes sit side by side on a sidewalk. the box on the left has a mass of 80kg and the box on the right has a mass of 50kg. a force is applied to the box on the left , such that both boxes accelerate to the right. draw a free body diagram for each box. include the force of friction
The force that prevents motion when the surfaces of two objects come into contact is known as friction. Friction decreases a machine's mechanical advantage, or, to put it another way, reduces the output to input ratio.
How can I figure out the frictional force?The resistive force of friction (Fr) divided by the normal or perpendicular force (N) pushing the objects together yields the coefficient of friction (fr), which is a numerical value.
The formula fr = Fr/N serves as a representation of it.
Therefore, 100N of force is needed to move an item with a mass of 50 kg.
It will accelerate by 10 m/s2.
If a substance's mass does not change over time, friction cannot affect it. Instead, friction can be affected in a variety of ways by an object's mass.
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What is the speed of a sound wave in water if a dolphin emits a sound of 2856.89 Hz which has a wavelength of 0.539 m?
The speed of the sound wave in water would be 1529.86 meters / second if a dolphin emits a sound of 2856.89 Hz which has a wavelength of 0.539 m.
What is the frequency?It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.
Speed of the sound = frequency × wavelength
=2856.89 × 0.539
= 1529.86 meters / second
Thus, If a dolphin emits a sound with a wavelength of 0.539 meters and a frequency of 2856.89 Hz, the speed of the sound wave in water would be 1529.86 meters per second.
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Which object has less mass but greater volume that a soccer ball ?A) smart phone B) a box of tissue C)a filled ballD) an empty balloon
D) An empty ballon have a greater volume and less mass than a soccer ball.
2 The deposit cylinder of a teller drive-in window at a bank travels through the tube at a constant speed of 4 meters per second. If it takes 17 seconds to travel from the car to the teller. What is the length of the tube the cylinder travels through.
The length of the tube the cylinder travels through 68 m
Constant speed of Cylinder v = 4 m/s
acceleration of Cylinder a = 0 [tex]m/s^2[/tex]
time taken during travel t = 17 Seconds
Since acceleration is constant, hence as per the equation of motion
[tex]S = vt + \frac{1}{2}at^2[/tex]
[tex]S = 4\times17 + \frac{1}{2}(0)17^2[/tex]
S = 68 m
What is acceleration ?The acceleration is positive when the object is speeding up and negative when speeding down. According to Newton’s Second Law, the net unbalanced force which acts on the object causes this to happen. Thus, it can be said that acceleration is a vector quantity. It is so because it changes the time rate of change of velocity. Mainly, Uniform acceleration, non-uniform acceleration, and average acceleration are the three types of accelerated motions.
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A uranium-238 atom can break up into a thorium-234 atom and a particle called an alpha particle, α-4. The numbers indicate the inertias of the atoms and the alpha particle in atomic mass units (1 amu = 1.66×10−27 kg). When an uranium atom initially at rest breaks up, the thorium atom is observed to recoil with an x component of velocity of -2.40×105 m/s. How much of the uranium atom's internal energy is released in the breakup?
The internal energy released during the breakup is 5.26MeV.
The atomic number of uranium is 92. This means that the atomic structure has 92 protons and 92 electrons. The core of U-238 has 146 neutrons, but the number of neutrons varies between 141 and 146. Uranium is radioactive, so it constantly emits particles and transforms into other elements. A radioactive silvery metal.
Uranium is a very important element as it provides the nuclear fuel used to generate electricity in nuclear power plants. It is also the main material from which other synthetic transuranium elements are made. Neither you nor your customers are at risk of radiation emitted from the uranium in the Vaseline bottle whether it is held in hand or standing on a shelf or table. Accidentally ingesting or inhaling shavings does not put you or your customers at risk of uranium.
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Look at the picture of an electromagnet that has picked up one sewing pin.
Which change could you make to allow the electromagnet to pick up more
sewing pins?
A. Use a nail that is much larger than the one shown.
B. Use a nail made of a nonmagnetic material.
C. Use half as many coils of wire around the nail.
OD. Use twice as many coils of wire around the nail.
The size of the nail if increased, there will be more surface to attract more number of sewing pins. Thus by using a nail larger than the one shown, the number of pins picked up by the nail is increased.
What is an electromagnet?An electromagnet is a magnetic material or metal that produce an electromagnetic field on to which the magnetically susceptible particles can be attracted.
An electromagnetic field is a combination of electric field and magnetic field. The direction of both will be perpendicular for an object. A magnet is usually made of iron and iron containing alloys.
If the surface of the magnetic nail has more space to attract, then more pins can be picked up using this. We cannot increase the attracted pins by increasing the coils around the nails. Thus option A is correct.
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Draw a supply graph for pizzas. Show what would happen to the supply of pizzas if two more pizzerias open up in town. Identify the determinant of supply that caused the shift.
Pizza delivery when two other pizzerias in town started changing their prices on their products.
All other things being equal an increase in demand will increase the equilibrium price. More will be delivered. A decrease in demand leads to a decrease in the equilibrium price. Low shipping quantity. An increasing change in supply shifts the supply curve to the right, and a decreasing change in supply shifts the supply curve to the left.
Essentially an increase or decrease in quantity offered at a higher or lower offer price. As the price of pizza slices rises consumers are more likely to purchase these alternatives as pizza replacements. This reduces the amount of pizza requested. Higher prices tend to increase supply as more prizes become available.
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Imagine you are a teacher. You are describing the atomic properties of inert gases to your second-grade class. You have supported your verbal lecture with a paper published in a scientific journal. If your students do not pay attention to the material, it is probably because:
Responses
The material is probably because your message was not at the right level of complexity.
Inert gases are gases that do not undergo chemical reactions under certain conditions. Noble gases often do not react with many substances and have historically been called inert gases. Inert gases are gases that have extremely low reactivity with other substances. The noble gases helium argon neon xenon krypton radon and the elements exist in elemental form and are included in group 18 of the periodic table.
Very sluggish and stable due to its complete shell. This means that it does not tend to react with other elements to form compounds. Under normal conditions they are gases. It is colorless and odorless. In many respects, inert gases are typically non-metallic. They are colorless, odorless gases with low melting and boiling points. Even liquids are poor conductors of heat and electricity.
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A man is changing a light bulb at the top of a 1500 foot tall radio tower and drops his screwdriver. Assuming no air resistance, how long will it take to hit the ground in seconds?
Answer:
9.68 seconds
Explanation:
To answer the question, we will use the following equation for the uniformly accelerated motion:
[tex]x=v_0t+\frac{1}{2}at^2[/tex]Where x is the distance travel by the object, v0 is the initial velocity, a is the acceleration and t is the time.
Since, the man drops his screwdriver, x = 1500 ft, v0 = 0 ft/s and a = -32 ft/s².
Then, replacing the values, we get:
[tex]\begin{gathered} -1500=0t+\frac{1}{2}(-32)t^2 \\ -1500=\frac{1}{2}(-32)t^2 \end{gathered}[/tex]Then, solving for t, we get:
[tex]\begin{gathered} -1500=-16t^2 \\ \frac{-1500}{-16}=\frac{-16t^2}{-16} \\ 93.75=t^2 \\ \sqrt[]{93.75}=t \\ 9.68\text{ s = t} \end{gathered}[/tex]Therefore, the screwdriver takes 9.68 seconds to hit the ground.
A car travelling at 30 /s accelerates at 5 m/s^2 for 7 seconds. What is the final velocity of the car?
Answer:
final velocity of the car = 65 m/s
Explanation:
Final velocity is given by
v = u + at where u is initial velocity, a = acceleration and t time taken
with u = 30 m/s, a = 5 m/s² and t = 7 s
Final velocity
v = 30 + 5 x 7
v = 30 + 35
v = 65 m/s
A 1780-pound car is parked on a street that makes an angle of 15° with the horizontal. Find the magnitude of the force required to keep the car from rolling down the hill.
We will determine the force required as follows:
[tex]\begin{gathered} F=(890kg\ast9.8m/s^2)sin(15)\Rightarrow F=2257.419711...N \\ \\ \Rightarrow F\approx2257.4N \end{gathered}[/tex]So, the force required is approximately 2257.4 N.
Please help! This is due tomorrow!
A cyclist maintains a constant velocity of 6.4 m/s headed away from point A. At some initial time, the cyclist is 249 m from point A.
Part A: What will be his displacement from his starting position after 79 s?
Part B: What will be his position from point A after that time?
If we changed our speed limit signs to metric, what would probably replace the following? (Enter your answers to the nearest km/h.)(a) 30 mi/h___ km/h(b) 75 mi/h_____ km/
Given:
We have changed our speed limit signs to metric.
To find:
(a) 30 mi/h in km/h
(b) 75 mi/h in km/h
Explanation:
We know,
[tex]1\text{ mi=1.61 km}[/tex](a)
So,
[tex]\begin{gathered} 30\text{ mi/h} \\ =30\times1.61\text{ km/h} \\ =48.3\text{ km/h} \end{gathered}[/tex]Hence,
[tex]30\text{ m/h=48.3 km/h}[/tex]b)
Now,
[tex]\begin{gathered} 75\text{ mi/h} \\ =75\times1.61\text{ km/h} \\ =120.75\text{ km/h} \end{gathered}[/tex]Hence,
[tex]75\text{ mi/h=120.75 km/h}[/tex]Carl drops a 2.42 kg rock into a pit. The pit is 13 m deep. How long does it take for the rock to fall to the bottom of the pit?
Answer:
1.63 s
Explanation:
Mass of the rock is irrelavent...not needed.
d = 1/2 a t^2
13 = 1/2 ( 9.81) t^2 t = 1.63 seconds
The laws of physics depend on your speed?True or False
False.
The laws of physics do not depend on your speed what can change is how we need to describe them, that is, if, for example, the frame from which we are describing the laws is accelerating then it is usually harder to explain the motion or phenomena happening but the laws of physics are not changing. Another example of this is when the speed is close to the speed light, on these situations we need to use relativistic equations to describe what is happening, the reason we don't do this when the speed is not comparable to the speed of light is because the relativistic effects are negligible but that does not mean that they are not there or that the laws are changing.
Danny takes his dog to the local dog park every morning, as well (dog-walking is verypopular in this area).He walks with his dog 5 blocks east, 5 blocks north, and 5 west in order to get to the park.If each block is 56 meters, what distance did Danny travel in meters?Answer:m
Given:
Danny takes his dogs to the park.
He walks with his dog 5 blocks east, 5 blocks north, and 5 west to get to the park.
Each block is 56 m.
To find:
The total distance covered by Danny
Explanation:
The total number of blocks Danny covers is,
[tex]5+5+5=15[/tex]As the distance does not require the direction, the distance covered by Danny is,
[tex]\begin{gathered} D=15\times56 \\ =840\text{ m} \end{gathered}[/tex]Hence, the distance covered by Danny is 840 m.
The length of the displacement vector represents how far an object
Answer:
The displacement vector from one point to another is an arrow with its tail at the first point and its tip at the second. The magnitude (or length) of the displacement vector is the distance between the points and is represented by the length of the arrow
