To find
When either low-mass or high-mass main sequence stars run out of hydrogen in the core, the
core will contain
Explanation
When either low-mass or high-mass main sequence stars run out of hydrogen in the core, the
core will contain helium
Conclusion
The core will contain helium
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
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
Can you please help me with my first lap question
Explanation:
A charge is a scalar quantity associated with every material. when we say a body or an object is charged then it means that a body or an object gained a positive charge or negative charge.
A conductor is a metal that contains a lot of electrons in it.
A dark knob or a ground is the source or sink where any charge is dumped.
(1)
when there is a negative charge on an object that will be spread over the surface by the Coulomb force.
so (c) spread out over a large area on the object.
(2)
both the positive and negative charges move to the conductor and exit the conductor.
(3)
(b) a person can not be shocked if they have a neutral charge.
All options have been defined.
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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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]platypus is considered as a bridge anim why al between birds animal between bird and mammals why
Answer:
monotremes such as the platypus often display early mammalian features that are similar to reptilian physiology and thus reflect all mammals' common evolutionary origin in reptiles. These features include the platypus's lower body temperature and lack of teats.
hope it helps you
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.
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]QT= 160 micro-Coulombs In scientific notation, what is that charge in just Coulombs?
We are given the following quantity:
[tex]Q=160\text{ micro-Coulomb}[/tex]Let's remember that in scientific notation the term "Micro" refers to ten to the minus 6, therefore, this is equivalent to:
[tex]Q=160\times10^{-6}C[/tex]We can convert this into standard notation by multiplying by the ten to the minus six:
[tex]Q=0.00016C[/tex]Therefore, the charge is 0.00016 Coulomb.
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 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.
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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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.
A 2 kg object and a 1 kg object are dropped from the same height.
Given that the inertia
masses of these objects are not the same, what hypothesis explains
why the two objects
fall with the same acceleration?
Select one:
O a. The force of gravity is the same for the 1 kg object as for the 2 kg object
O b. The force of friction is the same for the 1 kg object as for the 2 kg object.
O c. The force of gravity on the 1 kg object is twice as great as on the 2 kg object.
Od. The force of friction on the 2 kg object is twice as great as on the 1 kg object.
The first choice (A) will be accurate.
Objects weighing 1 kg and 2 kg are dropped from the same height.
Because the force of gravity is the same for both the 1 kg and the 2 kg objects, the two objects fall with the same acceleration.
What is gravity?Gravity pulls you toward the ground because all objects with mass, such as our Earth, actually bend and curve the fabric of the universe, known as spacetime. Gravity is the curvature of the earth. Gravity, also known as gravitation, is a force that exists between all physical objects in the universe. The force of gravity tends to attract any two objects or particles with nonzero mass toward each other. Gravity affects objects of all sizes, from subatomic particles to galaxy clusters. Gravity is the force that pulls objects toward the center of a planet or other entity. Gravity keeps all of the planets in orbit around the sun.To learn more about gravity, refer
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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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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.
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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An m = 6 kg ball is projected with initial horizontal speed v = 60 m/s from a platform h = 80 meters high.(a) How much time does it take for the ball to reach the ground?(b) What is the ball's kinetic energy when it reaches the ground?
Given the mass of the ball, m= 6 kg, and the horizontal speed, v = 60 m/s.
Also, the height of the platform, h = 80 m
(a) To find the time required to reach the ground, t
Time can be calculated from the formula
[tex]\begin{gathered} h=\frac{1}{2}gt^2 \\ t=\sqrt[]{\frac{2h}{g}} \end{gathered}[/tex]Here, g= 9.8 m/s^2 which is the acceleration due to gravity.
Substituting the values in the above equation, we get
[tex]\begin{gathered} t=\sqrt[]{\frac{2\times80}{9.8}} \\ =4.03\text{ seconds} \end{gathered}[/tex](b) To find the Kinetic energy of the ball.
In order to find kinetic energy, first, we need to find the velocity.
The velocity at the ground, u can be obtained by the formula
[tex]u=v+gt[/tex]Substituting the values, we get
[tex]\begin{gathered} u=60+(9.8\times4.03)_{} \\ u=99.49\text{ m/s} \end{gathered}[/tex]Substituting the value of velocity in the below formula of kinetic energy, we get
[tex]\begin{gathered} KE=\frac{1}{2}mu^2 \\ =\frac{1}{2}\times6\times(99.49)^2 \\ =29694.78\text{ J} \end{gathered}[/tex]Thus, the time taken is 4.03 seconds and kinetic energy is 29694.78 J
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?
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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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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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
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
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.
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
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
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.
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.
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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