Answer:
Rating of percieved exertion
how does analogue signals work?
Explanation:
An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information.
Use the picture to answer the question.
Name at least three physical properties of the bowling
ball.
1
Answer:
I need the picture to amswer the question thay's why it says " "
If your speed is 3 meters in 1 second (3m/s), how long would it take you to go 15
meters?
Answer:
5 seconds
Explanation:
Answer:
5 seconds
Explanation:3=1 6=2 9=3 12=4 15=5 15 equal 5 mean 15 meters in 5 sec
A exerted by an object on another is a force
hope this helps
Answer:
If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person.
What is the value of acceleration as a body moves with an uniform speed
Answer:
the value of acceleration as a body moves with an uniform speed is zero
How can a person sing into a piano and cause a piano wire to vibrate? (1 point)
O The person sings at the same frequency as the piano wire, called the beat frequency.
OThe person sings at a different frequency than the piano wire, called the beat frequency.
OThe person sings at the same frequency as the piano wire, called the resonance frequency.
OThe person sings at a different frequency than the piano wire, called the resonance frequency.
Answer:
The person sings at the same frequency as the piano wire, called the resonance frequency.
Explanation:
The person sings at a different frequency than the piano wire, called as resonance frequency. So, option d is correct.
Interference directs to a phenomenon in which two wires meet while traveling along the exact medium and they superpose to create a resulting wave that is lower, greater, or the same amplitude as each other. The soundboard is a big wooden panel that amplifies the sound of the vibrating string.
In the given scenario, a beat frequency is listened to by a player when using a tuning fork to adjust a piano wire. Thus, the piano tuner should change the strain in the wire, this decreases the frequency of the wire.
A man is pulling on a rope with a force of 72 N
directed at an angle of 36◦
to the horizontal.
What is the x-component of this force?
Answer in units of N.
Answer:
57,6N
Explanation:
To find the component of a force on the x-axis we can simply do:
F * cos(36) = 72N * 0.8 = 57,6N
A housekeeper is cleaning the kitchen and decides to to use a ladder to reach a top shelf. As he/she is cleaning he/she is started by a mouse and falls off the ladder to the floor. As the he/she is falling, what is true about the magnitude of the Earth's gravitational force exerted on the housekeeper compared to the magnitude of gravitational force that the housekeeper exerts on the Earth?
The amount of gravitational force between both objects will be the same.
The magnitude of the Earth's gravitational force exerted on the housekeeper is calculated by applying Newton's second law of motion;
F = mg
where;
m is the mass of the housekeeper
g is acceleration due to gravity
According to Newton's third law of motion, action and reaction are equal and opposite.
The force exerted on the housekeeper by the Earth is equal in magnitude to the force exerted on the Earth by the housekeeper.
\(F_{H} = - F_{E}\)
The two forces are equal in magnitude but opposite in direction.
Thus, the correct option is " the amount of gravitational force between both objects will be the same"
The missing part of the question is below:
a. the Earth exerts the largest amount of gravitational force
b. the housekeeper exerts the largest amount of gravitational force
c. the amount of gravitational force between both objects will be the same
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At some point in the water cycle, the water vapor in the upper atmosphere cools and changes into droplets or ice crystals. What is this part of the process called?
A. precipitation
B. condensation
C. transpiration
D. evaporation
Answer: B
Explanation:As the water vapor rises higher and higher the cool air of the atmosphere causes the water vapor turn back into liquid water creating clouds
a bird grabs a clam, carries it in its beak to a considerable height, and then drops it on a rock below, breaking the clam shell. which is the correct energy conversion when the clam is dropped?
When the bird drops the clam from a height, the potential energy of the clam is converted into kinetic energy. As the clam falls, it gains kinetic energy and loses potential energy.
An object's kinetic energy is the type of energy it has as a result of motion. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.When the clam hits the rock, the kinetic energy is converted into other forms of energy, such as sound and heat, and the clam shell breaks.
Therefore, the correct energy conversion when the clam is dropped is from potential energy to kinetic energy, followed by a conversion of kinetic energy into other forms of energy.
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Which type of thermal energy transfer does a wrapping of cotton or plastic reduce the most? O A. Radiation O B. Conduction O C. Convection O D. Translation
Answer: Translation
Explanation:
Apex
Thanks
Answer:
RADIATION
Explanation:
JUST TOOK IT ON APEX
write the relation between horsepower and Watt?
Explanation:
Horsepower is related to watt as: 1 horsepower = 746 W = 750 W approximately. 1 horsepower (HP) = 750 watt (approx.) The power is one watt when one joule of work is done in one second.
Answer:
1HP = 746 watts
Explanation:
The relation between Horsepower and watt is that One Horse Power is equal to 746 Watts .
\(\large{\boxed{ \sf 1 HP = 746 Watts = 0.746 kW }}\)
at what temperature can you throw water in the air and it freezes?
At the temperature -40°C (-40°F), can you throw water in the air and it freezes.
This is known as the "flash freezing" point. It is the temperature at which water droplets instantly freeze when they come into contact with cold air.
This will occur in some actual temperature also. That will depend on various factors such as the size of the water droplets, the humidity of the air, and the speed of the wind.
The air around the freezing water droplets does not necessarily have to be in the temperature -40°C. For water to freeze in the air, the air temperature must be below this given temperature in at least some of the places. In many places the this is true also.
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which statement describes the difference between a metallic bond and a hydrogen bond?
a. A metallic bond forms when two polar molecules are attracted to each other, while a hydrogen bond forms between positive ions and freely moving electrons surrounding them.
b. A metallic bond forms between positive ions and freely moving electrons surrounding them, while a hydrogen bond forms when two atoms share valence electrons.
c. A metallic bond forms between positive ions and freely moving electrons surrounding them, while a hydrogen bond forms when two polar molecules are attracted to each other
d. A metallic bond forms when two nonpolar molecules are attracted to each other, while a hydrogen bond forms between two atoms that can share a pair of valence electrons.
According to the research, the correct answer is b. A metallic bond forms between positive ions and freely moving electrons surrounding them, while a hydrogen bond forms when two atoms share valence electrons.
What is the difference between a metallic bond and a hydrogen bond?A metallic bond allows the atoms of a metallic compound to hold together, clustering close together where the electrons break out of their orbitals and move freely throughout the compound.
In this sense, a hydrogen bond are unions of little attractive force where hydrogen and electronegative atoms are linked.
Therefore, we can conclude that there is mobility of the valence electrons in the metallic bond while a hydrogen bond is a bond that is produced from the attraction between a hydrogen atom and another with a negative charge.
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The Sankey diagram below shows the energy transfers in a computer. 100 J of energy are input, it is carried to the computer by
What one word completes the sentence?
Answer:
electricity
Explanation:
which of the following quantities are unknown?initial separation of the particlesfinal separation of the particlesinitial speed of the protoninitial speed of the alpha particlefinal speed of the protonfinal speed of the alpha particlemass of the protonmass of the alpha particlecharge of the protoncharge of the alpha particle
The quantities that are unknown final separation of the particles and initial speed of the protoninitial speed of the alpha particlefinal speed of the protonfinal speed of the alpha particles.
Alpha particles are positively charged particles consisting of two protons and two neutrons. They are the heaviest and most energetic of the common types of radiation emitted by radioactive materials. Alpha particles can be emitted by the decay of heavy elements such as uranium, radium, and plutonium. T
hey are relatively large and heavy, which means that they have a short range and are easily stopped by even thin materials such as paper or human skin. However, they can be dangerous if they are inhaled or ingested, as they can cause damage to living tissue and increase the risk of cancer
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two thin lenses with a focal length of magnitude 6.00 cm , the first diverging and the second converging, are located 4.50 cm apart. an object 2.80 mm tall is placed 10.0 cm to the left of the first (diverging) lens. for related problem-solving tips and strategies, you may want to view a video tutor solution of an image of an image. part a how far from this first lens is the final image formed? express your answer in centimeters.
5.45 cm to the right of the second lens is where the final image is created.
When an object is far from the lens, where is the image?The image will get smaller and smaller as we move the object further and further away. The focal point will draw the image's location ever-closer. The light would be concentrated at the focal point if the object were extremely far away, such as the sun.
Using the thin lens equation, we have: 1/f = 1/di + 1/do
For the first lens, we have:
f1 = -6.00 cm (negative because the lens is diverging)
do1 = -10.0 cm (negative because the object is to the left of the lens)
Solving for di1, we get: 1/di1 = 1/f1 - 1/do1
di1 = -15.0 cm (negative because the image is to the left of the lens)
The first lens creates a virtual, upright image whose magnification is determined by: m1 = -di1/do1 = 1.50
As there are 4.50 cm between the first and second lenses, the location of the thing that the second lens sees is:
do2 = di1 - 4.50 cm = -19.5 cm
For the second lens, we have:
f2 = 6.00 cm (positive because the lens is converging)
do2 = -19.5 cm (negative because the object is to the left of the lens)
Solving for di2, we get:
1/di2 = 1/f2 - 1/do2
di2 = 5.45 cm
The final image is real and inverted, and its magnification is given by:
m = -di2/do2 = 0.279
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a car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 50 ft/s2. what is the distance (in ft) traveled before the car comes to a stop? (round your answer to one decimal place.)
The distance covered by the car as it comes to rest is 13 m.
To calculate the distance covered before the car come to stop, we use the formula below.
Formula:
v² = u²+2as............... Equation 1
Where:s = distance covered by the car
v = final velocity
u = initial velocity
a = acceleration of the car
make s the subject of the equations
= (v²-u²)/2a........................Equation 2
From the question,
Given:
v = 50 mi/h = (50×0.447) = 22.35 m/su = 0
m/sa = 50 ft/s² = (50×0.3048)
= 15.24 m/s²
Substitute these values into equation
2s = (22.35²-0²)/(2×15.24)s
= 13m
Hence, the distance covered by the car as it comes to rest is 13 m.
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Find the work done by winding up a hanging cable of length 24 ft and weight density 1 lb/ft. round your answer to two decimal places, if necessary.
The work done by winding up a hanging cable of length 24 ft and weight density 1 lb/ft is 576.00 lb-ft.
The work done by winding up a hanging cable can be determined using the formula:
Work = Weight × Distance
To find the weight of the cable, we multiply the weight density by the length of the cable. In this case, the weight density is given as 1 lb/ft and the length of the cable is 24 ft:
Weight = Weight Density × Length
Weight = 1 lb/ft × 24 ft
Weight = 24 lb
Now, we need to determine the distance over which the cable is wound up. Since the cable is hanging, we can assume that it is wound up to a point directly above its initial position. Therefore, the distance is equal to the length of the cable, which is 24 ft.
Now we can calculate the work done:
Work = Weight × Distance
Work = 24 lb × 24 ft
Work = 576 lb-ft
Rounding the answer to two decimal places, we get:
Work = 576.00 lb-ft
The work done by winding up a hanging cable of length 24 ft and weight density 1 lb/ft is 576.00 lb-ft.
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What is a line of action? a line that extends through the length of a force vector a line that is perpendicular to the length of a force vector
The line of action is a line that extends through the length of a force vector. It represents the direction in which a force is applied.
To understand the line of action, let's take an example. Imagine a person pushing a box with a force of 50 Newtons. The line of action in this case would be a straight line that goes from the point where the person is applying the force through the length of the force vector, in the direction of the push.
In simpler terms, the line of action is like an imaginary path along which the force is being applied. It helps us understand the direction and orientation of the force vector.
In conclusion, the line of action is the line that extends through the length of a force vector, indicating the direction in which the force is being applied.
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A 60 kg ice-skater, travelling initially at 3.0 m / s, glides across a horizontal icy surface. The skater brakes and comes to rest after 5.0 m.
The work done against the braking force is the change in the kinetic energy of the skater
Answer:
54 N
Explanation:
a= v/t
3÷5/3= 1.8 m/s^2
f=ma
1.8 x 60 = 108/2 = 54 N
The work done against the braking force is the change in the kinetic energy of the skater is 54 N.
What is work done?Work is said to be done whenever a force moves an object over a distance.
\(W = F = ma\)
where
Acceleration is given by
\(a = v/t\)
\(a = \frac{3}{5/3}\)
\(a = 1.8 m/s^2\)
Work is
\(W = ma\)
\(W = 60*1.8 m/s^2\)
\(W = 54 N\)
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Plants release oxygen into the air us what type of sphere
Answer:
Biosphere
Explanation:
Plants release the biosphere into the atmostphere. :)
An airplane slows to prepare for landing from 150 km/hr to 75 km/hr north in 1.5 hours. What is the acceleration of the plane?
the two rotating systems shown in the figure differ only in that the two identical movable masses are positioned at different distances from the axis of rotation. if you release the hanging blocks simultaneously from rest, and if the ropes do not slip, which block lands first?
Answer: the block at the right lands first
Explanation:
If we release the hanging blocks simultaneously from rest, and if the ropes do not slip, which block lands first towards the right.
What is the rotating system?The system exhibits a motion about an axis that vertically represents the center axis. Such a type of motion is exhibited in the system known as the rotating system.
From the given conditions the two identical movable masses are positioned at different distances from the axis of rotation.
If we release the hanging blocks simultaneously from rest, and if the ropes do not slip, which block lands first toward the right.
Because the center of mass of the block is towards the right and the net force acting on the system is also towards the right.
Hence if we release the hanging blocks simultaneously from rest, and if the ropes do not slip, which block lands first towards the right.
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The quantity of charge q (in coulombs) that has passed through a surface of area 2.05 cm
2
varies with time according to the equation q=4t
3
+7t+6, where t is in seconds. (a) What is the instantaneous current through the surface at t=0.950 s ? A (b) What is the value of the current density? kA/m
2
The value of the current density is 892.20 kA/m².
Given equation is q=4t³ + 7t + 6.
The expression for current density is given by: Current density (J) = I / A where I is the current and A is the cross-sectional area.
Let's find the instantaneous current through the surface at t = 0.950 s by differentiating the given equation with respect to time we get, I = dQ/dt = 12t² + 7I(0.950) = 12(0.950)² + 7 = 18.31 A
The instantaneous current through the surface at t = 0.950 s is 18.31A.
To find the value of the current density we need to find the cross-sectional area of the surface, which is given by: A = 2.05 cm² = 2.05 × 10⁻⁴ m²
The current density is given by, Current density = I / A= 18.31 / 2.05 × 10⁻⁴= 892195.12 A/m²= 892.20 kA/m² (approximately)
Hence, the value of the current density is 892.20 kA/m².
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A car must be driven a distance of 120 km in 2.5 h. During the first 1.5 h, the average speed was 70 km/h. Calculate the average speed for the remainder of the journey.
The average speed for the remainder of the journey of the car which covers a distance of 120 km in 2.5 h is 15 km / h
v = d / t
v = Average velocity
d = Distance
t = Time
During the first 1.5 h,
v = 70 km / h
d = v * t
d = 70 * 1.5
d = 105 km
During the remainder of the journey,
d = 120 - 105
d = 15 km
t = 2.5 - 1.5
t = 1 hr
v = 15 / 1
v = 15 km / h
Therefore, the average speed for the remainder of the journey is 15 km / h
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a pole-vaulter runs down a track, plants one end of the pole into the ground, and then jumps in the air while bending the pole. As the pole unbends, it creates force that launches the pole-vaulter up and over the bar using your knowledge of potential and kinetic energy, describe how the pole is like a spring.
When the pole is lifted, it could be able to supply energy to the pole - vaulter much like that of a spring that launches the pole vaulter upwards.
How does the pole vault work?We know that the pole vault is one of the popular sports especially in the Unites States. It is a competition that takes place even at the Olympic level and has a lot of athletes that do compete in the competition.
We know that as the pole unbends, it creates force that launches the pole-vaulter up and over the bar using your knowledge of potential and kinetic energy.
This implies that there are a series of energy conversions that do take place in the pole vault as it is in operation as we can see here. Thus, it is the series of the energy conversions that takes place in the pole vaulting that enables the athlete to be able to launch high in the game as we see.
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If a mineral contains only atoms of oxygen and a metal, it is most likely
O an oxide.
O a sulfate.
a phosphate.
a silicate.
which of these galaxies is most likely to be the oldest? (a) a galaxy in the local group (b) a galaxy observed at a distance of 5 billion light-years (c) a galaxy observed at a distance of 10 billion light-years
A galaxy in the local group is most likely to be the oldest.
How many light years old is the cosmos?As a result, the cosmos is estimated to be around 25 billion light years across. In 1958, Alan Sandage reduced the Hubble's constant value once more, but he still came up with an age range for the universe between 15 and 25 billion years.It is exactly because of the expanding cosmos that we can see things that are up to 46.1 billion light-years away. There will always be restrictions on the items we can view and the objects we might be able to access, regardless of how much time passes.Our own Milky Way galaxy, according to astronomers, is 13.6 billion years old. The most recent galaxy that we are aware of originated about 500 million years ago.To learn more about galaxy refer to:
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Chemical bonds are formed from the attractive force of Atoms for electrons. What is the force called.
A. Ionization energy
B. Attraction of opposites
C. Chemical bonding
D. Electronegativity