the ocean creates tides accosiated with the ocean
please help me i don't get it
Answer:
39)
a) distance traveled = 1 mile
b) displacement = 0 mile
40) - 4 (m/s)
41-) distance traveled = 5 [m]
displacement = 3.6 [m]
Explanation:
The distance differs from the displacement, the distance traveled is equal to the sum of all displacements made by the particle or object.
Displacement is the difference between the initial point and the final point where the object or particle was stopped.
Then we can use the equation given:
[tex]a=\frac{(v_{f} - v_{i} )}{t} \\where:\\v_{f}=16[m/s]\\v_{i}=2[m/s]\\t=3.5[s]\\a=\frac{(2-16)}{3.5}\\ a=-4[m/s][/tex]
The minus sign means the particle is slowing down.
For the 41) we can see the attached image.
In the graph we can see that the particle moves north 3 miles, so that the first distance is 3 miles, then moves 2 miles east being the second distance of 2 miles. Thus the sum of the distances is 3 + 2 = 5 miles.
Displacement is the difference between the endpoint and the initial point since the form of displacement is a straight line, we can use the formula of the straight line or the theorem of Pythagoras.
[tex]d=\sqrt{(2-0)^{2}+(3-0)^{2} }\\d=3.6 [mi][/tex]
There are four springs stretched by the same mass.
Spring A: 25 cm
Spring B: 10 cm
Spring C: 100 cm
Spring D: 1 cm
Which spring is the strongest?
A
B
C
D
Answer:
That would be Spring C
Explanation:
i took the test :P
Answer:
The answer is C please give me brainliest
Explanation:
What is the law of conservation of Machanical energy?
Final answer:
The law of conservation of mechanical energy states that the total mechanical energy (kinetic plus potential) in a closed system subjected to conservative forces remains constant, assuming no energy is lost via non-conservative forces like friction.
Explanation:
Law of Conservation of Mechanical Energy
The law of conservation of mechanical energy states that in a closed system where only conservative forces are acting, and in the absence of non-conservative forces such as friction or air resistance, the total mechanical energy of the system remains constant. Mechanical energy is the sum of the object's kinetic energy (energy due to motion) and potential energy (energy stored due to position). This implies that any loss in potential energy will result in an equal increase in kinetic energy, and vice versa, hence keeping the total energy unchanged.
As an example, consider a roller coaster. At the highest point, the car has maximum potential energy and minimum kinetic energy. As the car descends, potential energy decreases while kinetic energy increases. If we assume no energy loss to friction, the sum of potential and kinetic energies at any point will equal the total mechanical energy at the top of the first rise, illustrating the conservation of mechanical energy.
In mathematical terms, the law can be expressed as K + U = constant, where K represents kinetic energy and U represents potential energy. This conservation is also a consequence of the work-energy theorem when applied to conservative forces, leading to the understanding that the net work done is equal to the change in kinetic energy of the system.
Two persons A and B do same amount of work. The person A does that work in t1sec and the person b in t2sec. Find the ratio of power delivered by them.
The ratio between power of A and power of B is 2
Explanation:
In physics, power is defined as the ratio between the work done and the time taken to do the work:
[tex]P=\frac{W}{t}[/tex]
where
P is the work done
t is the time taken
In this problem, we have:
Person A and person B do the same amount of work --> let's call this work W
Person A does this work in a time of [tex]t_A = 1 s[/tex], so the power delivered by A is
[tex]P_A = \frac{W}{1}=W[/tex]
Person B does this work in a time of [tex]t_B = 2 s[/tex], so the power delivered by B is
[tex]P_B = \frac{W}{2}[/tex]
So, the ratio of the powers delivered by the two persons is
[tex]\frac{P_A}{P_B}=\frac{W}{W/2}=2[/tex]
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If humans evolved from apes or chimps, why are the chimps and apes still here?
Answer:
Chimps and apes are still here because humans did not evolve from all apes and chimps.
Explanation:
Which of the following describes the measure of current
Answer:
b. The rate at which charge flows
Explanation:
First we must complete the question:
Which of the following describes the measure of current:
a. The quality of the charge flow
b.The rate at which charge flows
c. The ability for something to have a charge flow
d.The potential for a charge to flow
The answer is b) The rate at which charge flows
The electric current is the electric charge flow that passes through a conductive material for a certain period of time. It is expressed in C / s, culombios per second in the international system of units, and the unit is known as Ampere (a)
The charge can be defined by culombio [C]
how much force is acting on a 150g object in free fall
Answer:
The force acting on the free-falling object is, F = 1.47 N
Explanation:
Given data,
The mass of the object, m = 150 g
When an object is under free-fall, the only force acting on the object is the gravitation force neglecting the air resistance.
So, when an object is close to the surface of the earth acceleration due to gravity acting on the object is equal to g.
The value of g at the surface of the Earth is, g = 9.8 m/s²
Therefore, the force acting on the object under free fall is,
F = mg
= 0.15 x 9.8
= 1.47 N
Hence, the force acting on the free-falling object is, F = 1.47 N
Find the current i in:
Answer:
I = 24 A
Explanation:
This is Parallel Circuit and it is the first principle of parallel circuit that voltage will be equal in all components in the circuit
It includes 10 resistors Therefore the voltage across,
R1 = R2 = R3 = R4 = R5 = R6 = R7 = R8 = R9 = R10 = voltage in battery
Ohm's LawWe will apply Ohm's Law to each resistor to find its current because we know the voltage across each resistor is 12 V and the resistance of each resistor is 5Ω
I (R1) = E (R1) / R1
I (R1) = 12v / 5Ω
I (R1) = 2.4 A
The value resistance E of all resistors are same therefore by applying the formula above the value of current in all resistors will be 2.4 A
The Total current in the circuit will be
I (total) = I (1) + I (2) + I (3) + I (4) + I (5) + I (6) + I (7) + I (8) + I (9) + I (10)
I (total) = 2.4 + 2.4 + 2.4 + 2.4 + 2.4 + 2.4 + 2.4 + 2.4 + 2.4 + 2.4
I (total) = 24 A
What is AC concerning electricity?
Answer:
Alternating current
Explanation:
The electrical current periodically changes direction.
Answer:
alternating current
Explanation:
A stands for alternating
C stands for current
the current which changes direction ( several times per second ) is known as AC or alternating current
how do you relate between magnetic field from current carrying wires with the force felt by a current carrying wire?
Answer:
"The magnetic field exert the force on current carrying wire in the direction of the individual charge particles moving."
Explanation:
The magnetic field that exert force in the current carrying wire in the same direction in which the charge particles moving came from the Right hand rule. The force are very higher that are sufficient to move the wire, hence, current particles have large number or moving particles in it. The wires through which current is flowing attract each other even in same direction because of the right hand rule only and also the formation of the magnetic field around the wire. The lines of force are the magnetic field.
State law of floatation
The law of floatation states that, a floating body displaces its own weight of the fluid in which it floats.
All leukocytes fight off infections by using phagocytosis.
A.
True
B.
False
the question is correct
a 75 kilogram boy initally at rest skis down the slope as shown assuming no frictional loss what will be his kinetic energy at the bottom of the slope
Answer:
The kinetic energy at bottom, K.E = 73500 J
Explanation:
Given data,
The mass of the boy, m = 75 kg
Let the height of the hill be, h = 100 m
The P.E is maximum at the top of the hill. Since the boy is at rest at the top of the hill, his K.E is zero.
When he reaches the bottom, his K.E is maximum and P.E is zero.
According to the law of conservation of energy, K.E at the bottom is equal to the P.E at top.
P.E = mgh
= 75 x 9.8 x 100
= 73500 J
Hence, the kinetic energy at bottom, K.E = 73500 J
The force of attraction between the opposite charges of the ions in an ionic compound
The force of attraction between the opposite charges of the ions in an ionic compound is an ionic bond.
Explanation:
The transfer process of valence electron between atoms referred as ionic bond. This is a kind of chemical bonds which can create two oppositely charged ions. In the presence of ionic bonds, the metal loses electrons and becomes a positive charge cation, while non-metal accepts these electrons and becomes a negative charge anion.
Here, more than 1 electron can be emitted or received to meet the octet principle and the net charge of the compound should be zero. For example: Table salt. In this compound, sodium loses the electron to become [tex]N a^{+}[/tex], while the chlorine loses the electron to become [tex]c l^{-}[/tex].
The force of attraction between opposite charges of ions in an ionic compound is caused by electrostatic forces, forming what is known as an ionic bond. This creates stability in the compound and the strength of this attraction is measured by the lattice energy. While ionic compounds are generally poor electrical conductors in their solid state, they can become excellent conductors when dissolved or melted.
Explanation:The force of attraction between the opposite charges of the ions in an ionic compound, often referred to as an ionic bond, is a result of electrostatic forces. For instance, in sodium chloride or table salt, positively charged sodium ions bond with negatively charged chloride ions, forming a crystalline molecule with exception of any net charge. That's because of the attraction between the oppositely charged ions which keeps them in close proximity.
An ionic compound is stable due to this electrostatic attraction between its positive and negative ions. An important concept in this context is lattice energy: it's the energy required to separate a mole of a solid ionic compound into its gaseous ions, and is essentially a measure of the strength of the ionic bonds in the compound.
Ionic compounds, or salts, tend to be rigid and brittle, having high melting and boiling points - all indications of the strength of ionic bonds. They are poor conductors of electricity in solid state as the strength of these bonds prevents ions from moving freely, however, once dissolved or melted, ionic compounds turn into excellent conductors because the ions can now move freely.
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explain why when someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure on this thumb
When someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure on this thumb because the area of the pin on the thumb side is larger than the area of the pin on the wood side
What is pressure?The total applied force per unit of area is known as the pressure.
The pressure depends both on externally applied force as well the area on which it is applied.
The mathematical expression for the pressure
Pressure = Force /Area
the pressure is expressed by the unit pascal or N /m²
Since, the area of the pin on the thumb side is larger than the area of the pin on the wood side, when someone uses his thumb to push a pin into a block of wood, the pressure on the wood is greater than the pressure on this thumb.
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The position of an object along the x-axis is described by the formula x = 3t 2 − 2t. Which of the following are the correct formulas for the velocity and acceleration of the object?
Answer:
the formulas of velocity and acceleration can be given as:
Velocity : [tex]x'=6t-2[/tex]
Acceleration :[tex]x"=6[/tex]
Explanation:
Given:
The position function or formula for an object along x-axis is given by:
[tex]x=3t^2-2t[/tex]
To find the velocity and acceleration formulas.
Solution.
Velocity of an object is defined as rate of change of position of an object.
The rate of change can be found out by taking derivative of the position function of the object.
Thus the velocity formula can be written as:
[tex]x'=\frac{d}{dt}3t^2-\frac{d}{dt}2t[/tex]
[tex]x'=6t-2[/tex] [ As [tex]\frac{d}{da}a^n= na^{(n-1)}[/tex] and [tex]\frac{d}{da}na=n[/tex] ]
So, the velocity can be represented as [tex]x'=6t-2[/tex]
Acceleration of an object is defined as rate of change of velocity. In order to find rate of change of velocity, we will take derivative of the velocity function.
Thus the acceleration formula can be given as :
[tex]x''=\frac{d}{dt}6t-\frac{d}{dt}2[/tex]
[tex]x''=6[/tex] [ As [tex]\frac{d}{da}na=n[/tex] and [tex]\frac{d}{da}n=0[/tex] ]
So, the acceleration can be represented as [tex]x''=6[/tex]
The correct answer for the velocity and acceleration of the object described by the position formula x = 3t² - 2t are v = 6t-2 and a = 6. The correct option is d.
The correct formulas for the velocity and acceleration of the object described by the position formula x = 3t² - 2t are: v=6t-2 ; a=6
To find the velocity, we take the first derivative of the position equation with respect to time. The velocity is the derivative of position, so we differentiate x = 3t² - 2t to get v = 6t - 2. To find the acceleration, we take the second derivative of the position equation with respect to time. The acceleration is the derivative of velocity, so we differentiate v = 6t - 2 to get a = 6.
Complete Question:
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The position of an object along the x-axis is described by the formula x = 3t² - 2t. Which of the following are the correct formulas for the velocity and acceleration of the object?
a. [tex]$v=2 t^3-t, a=2 t-3$[/tex]
b. [tex]$v=6 t^2-4, a=12 t$[/tex]
c. [tex]$v=(1 / 2) t^3-2 t, a=(5 / 2) t^4-(2 / 3) t^2$[/tex]
d. v=6t-2, a=6
We get hurt when we jump on a muddy floor than on a hard floor. give reason
A muddy floor can be very slippery so if you jump on a muddy floor, you will most likely slip and hurt yourself.
A hard floor will most likely be dry. So when you jump on a hardwood floor, you are less likely to slip. But, you can hurt your knees if you're not careful.
Answer:
Injury can occur
Explanation:
you might be running then you start jumping without putting your heels down, then might get achilles tendonitis in your achilles tendons.
If revenue is $3,000 and operating expenses are $4,000, cash flow equals _____. -$1,000 $1,000 -$7,000 $7,000
Answer:
-$1,000
Explanation:
$3000 - $4000
Answer:
-1000
3000-4000=-1000
A diesel engine has an input temperature of 300K and an efficiency of 33.3%. Calculate the exhaust temperature. Tc = K
The exhaust temperature is 200 K
Explanation:
The maximum efficiency of a machine is given by the equation:
[tex]\eta=1-\frac{T_C}{T_H}[/tex]
where:
[tex]T_H[/tex] is the temperature of the hot reservoir
[tex]T_C[/tex] is the temperature of the cold reservoir
For the engine in this problem, we have:
[tex]\eta = 0.333[/tex] (efficiency is 33.3%)
[tex]T_H=300K[/tex] is the temperature of the hot reservoir
Re-arranging the equation for [tex]T_C[/tex], we can find the exhaust temperature (the temperature of the cold reservoir):
[tex]T_C=T_H(1-\eta)=(300)(1-0.333)=200 K[/tex]
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Answer:
200k
Explanation:
A coil of wire, a battery, a few paper clips, and a thermometer are on a table of supplies
What other material or materials would be needed for a student to construct a basic electric motor?
A)A magnet
B)Some tape
C)An electric generator
D)Alligator clips and a plastic cup
The other material would be needed for a student to construct a basic electric motor is a magnet.
Answer: Option A
Explanation:
For constructing fundamental electric motors coils of wire, the battery, few paper clips, a thermometer, and a magnet are mandatory. The principle on which it works is when in magnetic field rectangular coil placed and current passes than force will act on it and rotate it continuously to convert electrical energy into mechanical energy.
Here magnet is compulsory to generate motion when two bar magnets placed against the north and south pole of each other than attractive force but if placed in a similar direction than repulsive force occur. Therefore, these attractive and opposing forces generate rotational motion.
Answer:
The answer is A
Explanation:This is the answer
what is friction? (explain if full sentences)
Answer: what comes to mind when we hear the word "Friction" ?
Basically friction is a "Force" that opposes an intend(ing) motion.
Explanation:
By motion I mean movement.
By force I mean a body that carries with it energy.
So to understand this better, just see it as a force(thing) that prevents or stops you from taking action.
this is the process of organisms adapting to he environment overtime
Natural selection is the process of organisms adapting to their environments over time.
Explanation:
Natural selection refers the process to various survival and multiplication of organisms due to environmental properties. For example peacock, pepper moth, etc. These lead to evolutionary changes in which individual with specific traits has higher survival or reproduction than individuals in other populations and passes on these hereditary genetic traits to their offspring.
A process in which organisms are well suited to the surroundings than others generate more offspring. Due to this process, the percentage of organisms that adapt to the environment is increasing with each generation.
What force causes the periodic motion of a pendulum?
O
A. Gravity
O
O
O
B. Elastic force
C. Nuclear force
D. Electric force
Answer:
the Answer is A
Explanation:
because the swinging motion of a pendulum is due to the force of gravity generated by the earth's size
20. A photographer takes an average of 15 pictures per session. The total
number of pictures pes) is a function of the number of sessions
a. Identify the independent and dependent variables.
b. What values of the domain and range make sense for this situation?
Explain.
c. Write a function to represent the total number of pictures taken. Then
determine the number of pictures taken in 22 sessions.
Answer:
A)
Independent variable -> number of sessionsDependent variable -> number of picturesB)
Values of the domain that make sense would be those from 0 on because there are no negative number of sessions; values of range that make sense would be also those from 0 on because there are no negative number of pictures.
C)
[tex]f(x)=15x[/tex], where "x" is the number of sessions.
If we have 22 session then:
[tex]f(22)=15*22[/tex]; f(22)=[tex]f(22)=330[/tex]
Explanation:
Hi please help me with this question. ..
A man throws a stone upwards with a 'u' velocity and after spending ' t' seconds watching the motion of the stone he once again projects another stone upwards hoping that that these 2 stones should meet eachother. If his assumption is correct and these two stones collide with eachother, show that the 2 stones should meet each other 't/2 + u/g 'seconds later from the time of the first projection.
Explanation:
For projectile motion, use constant acceleration equation:
Δx = v₀ t + ½ at²
where Δx is the displacement,
v₀ is the initial velocity,
a is the acceleration,
and t is time.
Both objects are projected upward with velocity u. The second object is thrown after a time t₀.
For the first object:
Δx = u t + ½ (-g) t²
Δx = u t − ½g t²
For the second object:
Δx = u (t−t₀) + ½ (-g) (t−t₀)²
Δx = u (t−t₀) − ½g (t−t₀)²
Assuming the objects meet, the displacements will be equal:
u t − ½g t² = u (t−t₀) − ½g (t−t₀)²
u t − ½g t² = u (t−t₀) − ½g (t² − 2tt₀ + t₀²)
u t − ½g t² = u t − u t₀ − ½g t² + g tt₀ − ½g t₀²
0 = -u t₀ + g tt₀ − ½g t₀²
0 = -u + g t − ½g t₀
g t = u + ½g t₀
t = u/g + t₀/2
What is the distance between the earth and the sun?
Answer:
an average of 92,955,807 miles
Explanation:
Answer:
149,600,000 kilometers (km) or 92,900,000 miles.First I should say that the Earth's orbit around the Sun is elliptical, not perfectly circular, so the Earth-Sun distance is changing as we speak just from the Earth traveling in its orbit around the Sun. There are some long-period oscillations, but those are very small, and don't imply that we're systematically moving towards or away from the Sun.
I hope this answer helps you :)
How much force does an object with mass of 100 kg need to accelerate at 18 m/s2
an electromagnetic wave has a frequency of 6.0 x 10^18 Hz. What is the wavelength of the wave?
Answer:
500 nm
Explanation:
[tex]\lambda = c/\nu = \frac{3*10^8}{6*10^{18}} = 5*10^{-11}[/tex] m
Answer:
5*10^-11
Explanation:
From alvs
The moon is not seen at all on the new moon.why???
The moon is not seen at all on the new moon because:
The moon itself doesn't make a light, it reflects sunlight. At the point when the moon lies between the Earth and the Sun, it is just the posterior of the moon that is light by the Sun. In this circumstance, the side of the moon confronting the Earth can't mirror any light whatsoever and seems dull.
The distinction between another moon and a sunlight based over-shadowing is during a sun oriented obscuration, the moon is actually in the position to completely obstruct the sun during the day.
2) If two locations have the same latitude and are on a coast, what factor determines the air temperature
Ocean Currents is the factor that determines the air temperature in coastal regions having same latitude.
Explanation:
There are factors that use to determine air temperature. They are latitude, altitude, region, water current, etc and it is based on the combination of water, air, and land.
If two coastal regions situated in the same latitude means they are not in the same region. Another city can be in the same latitude but in longitude. All the coastal regions don't have the same air temperature.
The air temperature in coastal regions can measured by the Ocean Current. A hypothesis of using cold water and warm water use to determine the air temperature.