Answer:
Ek = 24.5 [J]
Explanation:
To solve this problem we must use the theorem of work and energy which tells us that potential energy is transformed into kinetic energy or vice versa.
In this way, the kinetic energy will be equal to the potential energy at each moment.
Ep = Ek
With the height and mass data, we can find the potential energy.
Ep =m*g*h
where:
Ep = potential energy [J] (energy in Joules)
m = mass = 500 [gr] = 0.5 [kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation = 5 [m]
Ep = 0.5*9.81*5
Ep = 24.5 [J]
So the kinetic energy is the same that the potential energy.
Ek =24.5 [J]
When you turn off your bedroom lights, the kitchen lights can stay on. This is because your home is wired using which of the following? (AKS 10b / DOK 1)
A.
Fuses
B.
Series circuits
C.
Batteries
D.
Parallel circuits
When you turn off your bedroom lights, the kitchen lights can stay on. This is because your home is wired by using the series circuit. Hence, option B is correct.
What is a Series circuit?The amount of current in the flow circuits of each element in a series circuit is the same. This is due to the recent flow having a single path. The flow rate (marble speed) at any point in a circuit (tube) at any given moment in time has to be equal because electric current moves through a conductor like marble in a duct.
The requirement that all values (voltage, current, resistance, and power) relate to one another in terms of the identical two places in a circuit is a significant exception to Ohm's law.
Therefore, the wiring of the home is in series combination. So, option B is correct.
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What would happen if the intake stroke never worked?
Answer:
you will die by it
Explanation:
Answer:
If the intake stroke never occurred, then the whole four stoke enegine process would not work
Explanation:
Answer my last post with all needed work for 75 POINTSSSS vist my profile to see it its on projectile motion !!!!!!!!!!
Answer:
ok
Explanation:
ok ok I will thanks for free
What does the acronym BMI stand for?
O A Body Median isotopes
O B. Beginning Mean Index
O . Body Mass Index
O D. Big Mass Inside
Answer:
body mass index
Explanation:
Answer:
[tex] \boxed{ \sf{ \: Option \: C \: is \: correct.}}[/tex]
Explanation:
BMI stands for Body Mass Index .
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Two balls collide – one heavy and one light. Why will the light one roll farther back than the heavy one?
Answer:
During a collision, some of the ball's energy is converted into heat. As no energy is added to the ball, the ball bounces back with less kinetic energy and cannot reach quite the same height. The heavy ball, on the other hand, is left behind with little energy and does not move much.
HELP ASAP !!! !!!!!!!
Answer:
they are cooler than the rest if the sun
A concave mirror produces a real image 1cm tall of an object 2.5mm tall placed 5cm from the mirror. Find the position of the image and the focal length of the mirror.
Answer:
the focal length is 4cm
Explanation:
use the formula 1+1/m = f
it is obtained from the mirror formula
m is the magnification and is the ratio of the image height to the object height
however they should have the same unit . that means you would have to do a little conversion from cm to mm or vice versa .
A wire with a linear mass density of 1.17 g/cm moves at a constant speed on a horizontal surface and the coefficient of kinetic friction between the wire and the surface is 0.250. If the wire carries a current of 1.24 A westward and moves horizontally to the south, determine the magnitude and direction of the smallest magnetic field that can accomplish this.
Answer:
The value is [tex]B = 0.2312 \ T[/tex]
The direction is into the surface
Explanation:
From the question we are told that
The mass density is [tex]\mu =\frac{m}{L} = 1.17 \ g/cm =0.117 kg/m[/tex]
The coefficient of kinetic friction is [tex]\mu_k = 0.250[/tex]
The current the wire carries is [tex]I = 1.24 \ A[/tex]
Generally the magnetic force acting on the wire is mathematically represented as
[tex]F_F = F_B[/tex]
Here [tex]F_F[/tex] is the frictional force which is mathematically represented as
[tex]F_F = \mu_k * m * g[/tex]
While [tex]F_B[/tex] is the magnetic force which is mathematically represented as
[tex]F_B = BILsin(\theta )[/tex]
Here [tex]\theta =90^o[/tex] is the angle between the direction of the force and that of the current
So
[tex]F_B = BIL[/tex]
So
[tex]BIL = \mu_k * m * g[/tex]
=> [tex]B = \mu_k * \frac{m}{L} * [\frac{g}{I} ][/tex]
=> [tex]B = 0.25 * 0.117 * [\frac{9.8}{1.24} ][/tex]
=> [tex]B = 0.2312 \ T[/tex]
Apply the right hand curling rule , the thumb pointing towards that direction of the current we see that the direction of the magnetic field is into the surface as shown on the first uploaded image
Catching a wave, a 77 kg surfer starts with a speed of 1.3 m/s, drops through a height of 1.65 m, and ends with a speed of 8.2 m/s. How much non-conservative work was done on the surfer?
Answer:
Explanation:
The total work done by the wave is expressed as;
Workdone = Potential energy + Kinetic energy
Workdone = mgh + 1/2mv²
m is the mass = 77kg
g is the acceleration due to gravity = 9.8m/s²
v is the velocity = 8.2m/s
h is the height = 1.65m
Substitute into the formula;
Workdone = 77(9.8)(1.65) + 1/2(77)8.2²
Workdone = 1245.09 + 2588.74
Workdone = 3833.83Joules
Hence the amount of non conservative work done on the sofa is 3833.83Joules
Given:
Velocity, v = 8.2 m/sHeight, h = 1.65 mMass, m = 77 kgWe know,
→ [tex]Work \ done = Potential \ energy +Kinetic \ energy[/tex]
or,
[tex]= mgh +\frac{1}{2} mv^2[/tex]
By putting the values,
[tex]= 77\times 9.8\times 1.65+\frac{1}{2}\times 77\times (8.2)^2[/tex]
[tex]= 1245.09+2588.74[/tex]
[tex]= 3833.83 \ Joules[/tex]
Thus the above approach is right.
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Morgan does 50 J of work with a lever
that has an efficiency of 92%. What is
the output work of the lever?
Answer:
46 J
Explanation:
Simply calculate the 92% of 50 Joules as:
0.92 * 50 J = 46 J
The temperature of a 2.0-kg block increases by 5°C when 2,000 J of thermal energy are added to the block. What is the specific heat of the block?
A golf ball is hit at an angle of 45° above the horizontal. What is the acceleration of the golf ball at the highest point in its trajectory? [Neglect friction.] a = m/s2
Answer:
32* acceleration
Explanation:
why? because if the ball is at a 35* angle then it will accelerate 32*
The acceleration of the golf at the maximum height is equivalent to acceleration due to gravity = 9.8 m/s².
The given parameters;
angle of projection of the ball, Ф = 45°
Acceleration is defined as the change in velocity per change in time of motion.
[tex]a = \frac{\Delta v}{\Delta t} = \frac{v_f }{t}[/tex]
where;
[tex]v_f[/tex] is the final velocity of the golf
At maximum height the final velocity of a projectile is zero (0)
The acceleration for upward motion becomes;
[tex]a = \frac{0 }{t} + g= g[/tex]
Thus, the acceleration of the golf at the maximum height is equivalent to acceleration due to gravity.
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Answer:
big bang theory
Explanation:
Edwin Hubble is credited for the initial development of the Big Bang theory, an idea which helps to explain the formation of the universe over 15 billion years ago.
what evidence do you that suggest water waves are transverse wave
Answer:
If you throw a pebble into a pond, ripples
spread out from where it went in. These
ripples are waves travelling through the
water. The waves move with a transverse
motion.
Explanation:
A soccer ball is kicked with an initial velocity of 35 m/s at an angle of 60 degrees from the horizontal. How far down the field will the ball hit the ground
Answer:
The ball will hit the ground 108.25 m down the field
Explanation:
To determine how far down the field the ball will hit the ground, that is the Range of the ball. From formula to calculate Range in projectile motion,
[tex]R = \frac{u^{2} sin2\theta }{g}[/tex]
Where R is the Range
u is the initial velocity
θ is the angle of projection
and g is acceleration due to gravity (Take g = 9.8 m/s²)
From the question,
Initial velocity, u = 35 m/s
Angle, θ = 60°
Putting these values into the equation, we get
[tex]R = \frac{35^{2} ( sin2(60)) }{9.8}[/tex]
[tex]R = \frac{1225 \times sin(120)}{9.8}[/tex]
[tex]R = \frac{1225 \times 0.8660}{9.8}[/tex]
[tex]R = \frac{1060.85}{9.8}[/tex]
[tex]R = 108.25 m[/tex]
Hence, the ball will hit the ground 108.25 m down the field.
Give real-world examples of evidence that supports the evolution of Earth in each category:
Deposition -
Chemical weathering -
Volcanic eruption -
Answer:
real world examples
Explanation:
concave wave rock- The wave rock is formed by weathering of the surrounding area, which helps in proving the deposition part, as the wave rock was below the ground, occurred due to deposition of rock years over years. It is made from very tough material from its surrounding. The weathering reduced the surrounding terrain, while the bedrock remained to witness for the history. --Also, volcanic eruptions have changed earth greatly. EX- Ash and sulfur went into Earth's atmosphere because of the Tambora eruption which dimmed incoming sunlight. It lowered global temperatures by about 3°F. The Mount Pinatubo of 1991 that erupted in the Philippines cooled the planet by about 1°F.
NEED HELP ASP
WILL GIVE POINTS OR WHATEVER
Answer:
you need to multiply the momentum and the mass
you know,dinner is taking,like,forever to cook,and i'm sterving
Answer:
OK?
Explanation:
Answer:
It happens and they might not even cook what you feel like eating.
Find the magnitude of the gravitational force (in N) between a planet with mass 6.00 X 10^24 kg and its moon, with mass 2.50 X 10^22 kg, if the average distance between their centers is 2.70 X 10^8 m. What is the moon's acceleration (in m/s2) toward the planet? (Enter the magnitude.) What is the planet's acceleration (in m/s2) toward the moon? (Enter the magnitude.)
Answer:
Magnitude of gravitational force between this planet and its moon: approximately [tex]1.37 \times 10^{20}\; \rm N[/tex].
Acceleration of this moon towards the planet: approximately [tex]5.49 \times 10^{-3}\; \rm m \cdot s^{-2}[/tex].
Acceleration of this planet towards its moon: approximately [tex]2.29 \times 10^{-5}\; \rm m \cdot s^{-2}[/tex].
Explanation:
Look up the gravitational constant, [tex]G[/tex]:
[tex]G \approx 6.67 \times 10^{-11}\; \rm m^3\cdot kg^{-1} \cdot s^{-2}[/tex].
Assume that both this planet and its moon are spheres of uniform density. When studying the gravitational interaction between this planet and its moon, this assumption allows them to be considered as two point masses.
The formula for the size of gravitational force between two point masses [tex]m_1[/tex] and [tex]m_2[/tex] with a distance of [tex]r[/tex] in between is:
[tex]\displaystyle F = \frac{G \cdot m_1 \cdot m_2}{r^2}[/tex],
where [tex]G[/tex] is the gravitational constant.
Let [tex]m_1[/tex] and [tex]m_2[/tex] denote the mass of this planet and its moon, respectively.
Calculate the size of gravitational force between this planet and its moon:
[tex]\begin{aligned} F &= \frac{G \cdot m_1 \cdot m_2}{r^2} \\ &\approx \frac{6.67 \times 10^{-11}\; \rm m^3 \cdot kg^{-1} \cdot s^{-2} \times 6.00 \times 10^{24}\; \rm kg \times 2.50 \times 10^{22}\; \rm kg}{{\left(2.70 \times 10^{8}\; \rm m\right)}^2} \\ &\approx 1.37 \times 10^{20}\; \rm N\end{aligned}[/tex].
Assume that other than the gravitational force between this planet and its moon, all other forces (e.g., gravitational force between this planet and the star) are negligible. The magnitude of the net force on the planet and on the moon should both be approximately [tex]1.37 \times 10^{20}\; \rm N[/tex].
Apply Newton's Second Law of motion to find the acceleration of this planet and its moon:
[tex]\displaystyle \text{acceleration} = \frac{\text{net force}}{\text{mass}}[/tex].
For this moon:
[tex]\displaystyle \frac{1.37 \times 10^{20}\; \rm N}{2.50 \times 10^{22}\; \rm kg} \approx 5.49\times 10^{-3}\; \rm m \cdot s^{-2}[/tex].
For this planet:
[tex]\displaystyle \frac{1.37 \times 10^{20}\; \rm N}{6.00 \times 10^{24}\; \rm kg} \approx 2.29 \times 10^{-5}\; \rm m \cdot s^{-2}[/tex].
you a viewing a read out on an oscilloscope that shows you when different voltages in a circuit maximize. If the period of the circuit is 0.04 seconds, how much time is there between when the capacitor voltage maximizes and the inductor voltage maximizes ?
Answer:
0.01 s
Explanation:
When the capacitor voltage is maximum, the inductor voltage is at a minimum, and when the capacitor voltage is minimum, the inductor voltage is at a maximum.
The time difference between minimum voltage and maximum voltage for the capacitor or inductor is the same as that for maximum voltage of capacitor to maximum voltage of inductor and this is t = T/4 where T = period.
Since T = 0.04 s, t = T/4
= 0.04 s/4
= 0.01 s
So, the amount of time is there between when the capacitor voltage maximizes and the inductor voltage maximizes is 0.01 s
Help me guys please with this question
Answer:
[tex]\mid \vec C\mid=31.9[/tex]
Explanation:
Consider the vectors:
[tex]\vec A=9.4\mathbf{\hat{i}}-3.6\mathbf{\hat{j}}[/tex]
[tex]\vec B=-9.5\mathbf{\hat{i}}-13.4\mathbf{\hat{j}}[/tex]
Calculate the magnitude of
[tex]\vec C=-2\vec B-\vec A[/tex]
Substitute the values of the vectors:
[tex]\vec C=-2(-9.5\mathbf{\hat{i}}-13.4\mathbf{\hat{j}})-(9.4\mathbf{\hat{i}}-3.6\mathbf{\hat{j}})[/tex]
Operate and remove parentheses:
[tex]\vec C=19\mathbf{\hat{i}}+26.8\mathbf{\hat{j}}-9.4\mathbf{\hat{i}}+3.6\mathbf {\hat{j}}[/tex]
Operating both components separately:
[tex]\vec C=9.6\mathbf{\hat{i}}+30.4\mathbf{\hat{j}}[/tex]
Now find the magnitude of C:
[tex]\mid \vec C\mid=\sqrt{9.6^2+30.4^2}[/tex]
[tex]\mid \vec C\mid=\sqrt{1016.32}[/tex]
[tex]\mathbf{\mid \vec C\mid=31.9}[/tex]
Ice cubes are added to an insulated cup of hot water. As a result, the temperature of the water decreases and the ice melts. What statement best explains the change in entropy of the system, which is the combination of water and ice cubes, on a molecular level?
a. The entropy of the system decreases, because the translational and vibrational motion of molecules in the liquid water decrease during collisions with molecules in the ice.
b. The entropy of the system remains unchanged, because the same amount of heating and cooling occur.
c. The entropy of the system increases, because the energy gained by the ice molecules is greater than the energy lost by the liquid water molecules.
d. The entropy of the system increases, because the disorder caused by the change in state from solid to liquid water causes more disorder than liquid water cooling causes order.
Answer:
d. The entropy of the system increases, because the disorder caused by the change in state from solid to liquid water causes more disorder than liquid water cooling causes order.
Explanation:
Entropy of a state may be defined as a natural process and spontaneous process. It is the measure of the disorder and randomness of the event.
In the context, when ice cubes are dropped in a cup of hot water which is insulated, the ice melts and the water temperature decreases. According to the principle of entropy increase, option A is wrong as the process in not a reversible process and option B is also wrong as it violates the principle of energy conservation. So option D is correct which shows the disorderness of the system.
2. How much time will it take to move 120 m if an object
moves 300 m/s?
Answer:
2.5 seconds
Explanation:
Time is equal to distance over speed
300 divide by 120 u get 2.5 seconds
A horizontal force of 30N is applied to a mass of 10 kg causing it to accelerate. If the coefficient of friction is 0.20 what is the frictional force?
If work is shown that would be great
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The force of friction is equal to the product of the vertical force applied by the surface to the object in the coefficient of friction.
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In this question ,
surface vertical force = Weight of the object
Thus ;
svf = ( mass ) × ( gravity acceleration )
_________________________________
If gravity acceleration is 10 :
svf = 10 × 10 = 100 N
So ;
frictional force = 100 × 0.20
frictional force = 20 N
##############################
If gravity acceleration is 9.8 :
svf = 10 × 9.8 = 98 N
So ;
frictional force = 98 × 0.20
frictional force = 19.6 N
_________________________________
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A balloon is inflated outside on a cool morning. As the temperature rises, reaching its peak in the afternoon, the volume of the balloon will Choose... . As the temperature cools down again in the evening, the volume of the balloon will
Answer:
The volume of the balloon will increase when temperature rises, and the volume of the balloon decreases to its initial value as temperature cools down.
Explanation:
An inflated balloon contains a definite amount of gas. Since the temperature varies, its volume would vary with respect to temperature.
The increasing temperature causes an increase in the average kinetic energy of the molecules of the gas inside the balloon. Therefore, the volume of the balloon increases as the temperature rises.
As the temperature cools down, assuming that the balloon didn't burst in the process, the kinetic energy of the molecules of the gas decreases. So that the volume of the balloon decreases to its initial value.
How many neutrons does protium have
Answer:
I believe none
Explanation:
answer pls urgent pls
Answer:
Brittleness
Explanation:
Lustrous means shiny
sonorous means capable of producing a deep or ringing sound
and iron isn't brittle or weak
Answer:
[tex]\huge\boxed{\sf brittleness}[/tex]
Explanation:
Iron is a metal which have luster (shine) so it is lustrous (shiny).
Iron is sonorous. When it is hit with a hard object, it produces ringing sounds.
Iron is not brittle. It cannot be easily broken. So, Iron does not show brittleness (It cannot be easily broken)
[tex]\rule[225]{225}{2}[/tex]
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~AnonymousHelper1807Please anyone, help me on this
Review Question 1
A group of students collected the data shown below while attempting to
measure the coefficient of static friction (of course, it looks like this group
varied the amount of mass sitting on the block with each trial - this is not
recommended). Nonetheless, what is their average coefficient of static friction?
Mass of block (g)
Hanging mass (kg)
Trial
1
105
0.053
2
165
0.081
3
220
0.118
4
280
149
5
315
0.180
6
385
0.198
Answer:
The average coefficient of static friction = 0.130
Explanation:
The average coefficient of static friction = [tex]\frac{sum of coefficient of static friction}{number of trials}[/tex]
From the given question, the coefficient of static friction given are:
0.053, 0.081, 0.118, 0.149, 0.180, 0.198
Thus,
the sum of the given coefficient of static friction = 0.053 + 0.081 + 0.118 + 0.149 + 0.180 + 0.198
= 0.779
The average coefficient of static friction = [tex]\frac{0.779}{6}[/tex]
= 0.129833
= 0.130
Therefore, the average coefficient of static friction is 0.130.
In general, chemical reactions occur because reactants are trying to become more
Answer:
Stable
Explanation:
Reactants usually will take any chance they can get to get to a form that will decrease their free energy, thus resulting in a higher stability.
In general, chemical reactions occur because reactants are trying to become more stable.
What is chemical reaction?
A chemical reaction is a process that results in the chemical change of one set of chemical components into another.
Chemical reactions are often defined as changes that only affect the locations of electrons in the formation and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can frequently be described using a chemical equation. Nuclear chemistry is a branch of chemistry that studies the chemical reactions of unstable and radioactive elements in which both electronic and nuclear changes can occur.
Reactants or reagents are the substances that are initially involved in a chemical reaction. Chemical reactions are often defined by a chemical change and the formation of one or more products with attributes distinct from the original.
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