Answer:
2.5A , 22500 JOULE
Explanation:
Resistance (R)= 6 ohm
Voltage (V) = 15 volt
a)
Current (I) = ?
From ohm's law,
V=IR
15 = 6*I
I = 2.5 A
b)
time(t) = 10min = 600 second
heat energy (Q) = ?
from Joule's law of heating,
Q = I²*R*t
Q = 2.5² *6*600
Q = 22500 Joule
hence, heat energy produced is 22500 joule.
If the students shake their slinky so that the frequency of the waves they generate decreases, what will happen to the wavelength of the slinky
HELP PLEASE
A bicyclist travels 10 km in half an hour then rests for half an hour, then travels 50 km in three hours. What was the bicyclist’s average speed over the entire trip?
How long would it take an object traveling 12 m/s to go 60 m?
If a car travels 60km/hr, how long would it take the car to travel 300km?
answer:
Xi + Xf =10km+30km=60km[tex] v \times \frac{x}{t} [/tex]The amount an object weighs depends on the presence of —.
Answer:
The weight of an object is dependent upon the value of the acceleration of gravity.
i just can't get around physics T^T this is the last question i promise, I'd really appreciate the help <3
question; the work one by friction force to stop a car of mass 1000 kg moves with velocity 72km/h is ..........
a) 72 x 10³ J
b) 2 x 10⁴ J
c) 2 x 10⁵ J
d) 4 x 10⁵ J
an explanation for future reference would be great, thank you in advance!
Use the work-energy theorem. The total work W performed on the car as it it slows to a stop is equal to the change in the car's kinetic energy ∆K. So
W = ∆K
W = 0 - 1/2 (1000 kg) (72 km/h)²
W = - (500 kg) (20 m/s)²
W = - 200,000 J = -2 × 10⁵ J
The closest answer would be C, but friction opposes the car's motion so the work would be negative.
Which type of energy is most important when considering the heating and cooling of a building?
A. thermal energy
B. chemical energy
C. potential energy
D. electrical energy
Heating and cooling are the kind of energy. The most important energy when considering the heating and cooling of a building is thermal energy. The correct option is A.
What is energy?Energy is the ability to do work.
The temperature of building is increased or decreased due to the season changes. This heating or cooling is a type of energy related to thermal.
Thus, the most important energy when considering the heating and cooling of a building is thermal energy. The correct option is A.
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Pls Help me .
The finger-like outgrowths of Amoeba helps to ingest food. However, the outgrowths of human intestine help to
(a) digest the fatty food substances (b) make the food soluble
(c) absorb the digested food (d) absorb the undigested food
(c) absorb the digested food
Explanation:
It is called villi' in case of human beings.. That's it..
The finger-like outgrowths in the human intestine are called villi, and their main function is to absorb the digested food. Therefore, the option is (c) absorb the digested food.
What is the function of villi in human ?The villi in the human intestine increase the surface area for absorption, allowing for more efficient uptake of nutrients from the digested food. They contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids. The nutrients are then transported to the liver and other parts of the body for use.
The function of villi in humans is to increase the surface area of the small intestine, which allows for more efficient absorption of nutrients from digested food.
Villi are finger-like projections that line the walls of the small intestine, and they are covered in tiny microvilli that further increase the surface area. The villi contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids from the digested food.
These nutrients are then transported to the liver and other parts of the body for use. Without villi, the surface area of the small intestine would be much smaller, and the body would not be able to absorb nutrients as efficiently. Hence, option C is correct.
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if a stone falls vertically downward from a roof 20m above the ground to a behicle 2m above the ground, the car is known as the________
please help me with the question below the best answer with an explanation will get brainliest
Answer:
B
Explanation:
i hope this is correct.
A 0.400-kg block of iron is heated from 295 oK to 325 oK. How much heat had to transfered to the iron?
The quantity of heat that was transferred to the block of iron is 5544 J or 5.544 kJ
Quantity of HeatFrom the question, we are to determine how much heat was transferred to the block of iron
Using the formula,
Q = mcΔT
Where Q is the quantity of heat
m is the mass
c is the specific heat capacity of the substance
and ΔT is the change in temperature
From the given information,
m = 0.400 kg
ΔT = 325 - 295 = 30 K
Putting the parameters into the equation, we get
Q = 0.400 × 462 × 30
(NOTE: Specific heat capacity of iron = 462 J/kg.K)
∴ Q = 5544 J
Hence, the quantity of heat that was transferred to the block of iron is 5544 J or 5.544 kJ
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Explain what happens to plasma osmolarity when you give a severely dehydrated person large amounts of pure water.
Plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
What is plasma osmolarity?The electrolyte–water balance of the body is measured by plasma osmolality. This amount can be determined in a variety of ways, including measurement and computation.
Osmolality and osmolarity are two separate measurements that are used interchangeably in everyday situations.
When you are dehydrated, osmolality rises, and when you have too much fluid in your blood, it drops.
The way your body regulates osmolality is unique. When your body's osmolality rises, your body produces antidiuretic hormone.
Hence,plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Solution: Expansion
Explanation:
When we put a glass bottle in the freezer, the volume of water is supposed to expand causing high surface tension leading to the glass to crack. As the volume of water increases, there is less space for the water to fit in.
Answer:
Expansion
Explanation:
According to boyles law
P is indirectly proportional to VAccording to gay lussac's law
P is directly proportional to TIn freezer
T decreases so P decreasesHence V increases
a ground-fault circuit interrupter shuts down a circuit if it?
a. melts.
b. senses an overload.
c. senses unequal currents.
d. senses moisture
What is the surface area for a rectangular prism with the height of 6 inches, width of 8 inches, and the length of 4 inches
Answer:
208 is the surface area!
Explanation:
Hope this helps! ;-)
pls help with this problem, it's not too hard
Answer:
.25 Hz
Explanation:
Period = 4 sec
freq = 1/p = 1/4 hz = .25 Hz
An athlete wants to refill an old punching bag used for training, as shown in the picture. When refilled, the bag will rip if it is kicked with too much force
The maximum force that the athlete exerts on the bag is NEGATIVE 1,500 N and in the OPPOSITE DIRECTION of the force that the bag exerts on the athlete.
Newton's third law of motionNewton's third law of motion states action and reaction are equal and opposite. That is the force applied to an object is equal in magnitude to force experienced by the object but in opposite direction.
From the given question, when the bag exert a certain on the athlete, the athlete also exerts similar force to the bag but in opposite direction.
Thus, the complete sentence is as follows;
The maximum force that the athlete exerts on the bag is NEGATIVE 1,500 N and in the OPPOSITE DIRECTION of the force that the bag exerts on the athlete.
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If you touch a conductor through which electricity flows with an insulator, will you receive a shock? Explain.
If you touch a conductor through which electricity flows with an insulator, the likelihood of receiving a shock depends on several factors, including the voltage and current of the electrical source, the amount of insulation present, and how well the insulation is able to insulate from the electricity.
Insulators are materials that do not conduct electricity and are commonly used to provide a barrier between humans and electrical conductors to prevent electrical accidents. When an insulator is used to touch a conductor through which electricity flows, the insulator acts as a barrier and prevents the current from flowing through the material and into the body.
However, if the insulation is inadequate or damaged, or the voltage of the electrical source is high enough to overcome the insulating properties of the material, a shock can occur. The shock occurs when the current passes through the body, causing damage to organs, muscles, and nerves.
Therefore, it is important to ensure that proper insulation practices are followed when working with electrical conductors, and to use insulation materials that are sufficient to protect against the voltage and current levels of the electrical source being used. Generally, it is recommended to avoid touching electrical conductors altogether, as the risk of electrical accidents is always present.
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No, you will not receive a shock if you touch a conductor through which electricity flows with an insulator. An insulator is a material that does not conduct electricity, meaning it does not allow the flow of electric current.
It has high resistance and acts as a barrier, preventing the transfer of electrons. Therefore, when you touch a conductor with an insulator, the insulator acts as a protective layer that blocks the flow of electric current and prevents it from reaching your body. As a result, you will not experience a shock. However, it is important to note that the effectiveness of the insulator in preventing a shock depends on its quality and condition. If the insulator is damaged or has a low resistance, it may not provide adequate protection, and there is a risk of electric shock. Additionally, it is crucial to follow safety protocols and avoid touching conductors or working with electricity unless you are trained and have the necessary knowledge and equipment to do so safely.
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a child pulls a sled by a rope across at a constant speed
of the forces listed identify which act upon the sled
normal
gravity
applied
friction
tension
air resistance
Answer:
Normal, Gravitational, Applied, Friction, and Tension
Explanation:
Because the sled is on the ground, or rather because it is on the earth, it will have a force of gravity, or its weight, pulling it down.
There is a normal force because the sled is not moving into the ground, so there needs to be a force pushing on the sled from the ground. Additionally, Newton's 3rd law states that for every action there is an equal but opposite reaction, if it's in equilibrium or not moving.
There will be an applied force since the child is pulling the sled and is applying a force to do so.
There will be a friction force that is pulling the sled opposite the direction it is moving, since it is on the ground that is presumably not fricitonless.
There will be a tension force pulling on the sled by the rope. However there is also a tension force pulling on the child's hand by the rope, meaning that these are internal forces and essentially balance out, but they are still there.
There is no air resistance force, or very little of it, since the object is not falling.
Calculate the value of C2 in the circuit below, if C1 = 33 F and Ctotal = 58 F.
The value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.
Capacitance of the circuit
The capacitance of the circuit is calculated as follows.
Assuming a parallel circuit arrangement for the capacitors;
C(total) = C1 + C2
58 F = 33 F + C2
C2 = 58 F - 33 F
C2 = 25 F
Thus, the value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.
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When a car moves up a hill with constant
speed, it
A gains both kinetic energy and potential
energy
B
gains both kinetic energy but loses potential
energy
C gains potential energy and no change in
kinetic energy
D
neither gains nor loses potential energy or
kinetic energy
How long does it take to produce a star?
Answer: From the moment the first gas cloud begins to compress until the star is formed and glows like the Sun, the process of star creation takes around a million years. Planets and other objects circle the central star using the remaining material from the star's formation.
Explanation:
Answer: Before the gas could disengage from the magnetic field and collapse, every ion in the gas would need to locate an electron to neutralize it. This implies that the formation of a star takes more than 10 million years.
Explanation:
An oscillator makes 720 vibrations in 3 minutes.
A: How many vibrations does it make in one minute?
B: How many vibrations does it make in one second?
C: What is its period in seconds?
D: What is its frequency in hertz?
Answer:
Below :)
Explanation:
A) 720/3 =240. 40 per minute.
B) 720/180 = 4 per second.
C) T=1/4 s^-1 (the formula) = 1/4 s. (The time peroid.)
D) V=1/T
V= 4 Hz
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
An oscillator makes 720 vibrations in 3 minutes. so, we have to solve the given problems based on it ~
#1. what's the number of vibrations per minute •
[tex]\qquad \sf \dashrightarrow \: 3 \: min = 720 \: vib[/tex]
[tex]\qquad \sf \dashrightarrow \: 1 \: min = \dfrac{720}{3} [/tex]
[tex]\qquad \sf \dashrightarrow \: 1 \: min = 240 \: vib[/tex]
#2. Calculate unit vibrations per second •
[tex]\qquad \sf \dashrightarrow \: 1 \: min = 240 \: vib[/tex]
[tex]\qquad \sf \dashrightarrow \: 60 \: sec = 240 \: vib[/tex]
[tex]\qquad \sf \dashrightarrow \: 1 \: sec = 4 \: vib[/tex]
#3. What's it's time period •
time taken to do 1 vibration is known as a period, so we can infer that :
[tex]\qquad \sf \dashrightarrow \: 1 \: vib = \dfrac{1}{4} \: sec[/tex]
[tex]\qquad \sf \dashrightarrow \: t = 0.25 \: sec[/tex]
#4. what is it's frequency in hert •
[tex]\qquad \sf \dashrightarrow \: f = \dfrac{1}{t} [/tex]
[tex]\qquad \sf \dashrightarrow \: f = \dfrac{1}{0.25} [/tex]
[tex]\qquad \sf \dashrightarrow \: f = 4 \: hertz[/tex]
A 2.2kg mass is at the origin. A 4.66kg mass is 3m to its right, and another 4.66kg mass is 3 m to its left. What is the net gravitational force on the 2.2kg mass?
Answer:
zero
Explanation:
The gravitational force between two masses is jointly proportional to the masses and inversely proportional to the square of the distance between them. The constant of proportionality is the universal gravitational constant.
__
In this scenario, the force to the right is matched by an identical force to the left from an identical mass at an identical distance. The magnitudes of the forces are equal, and their directions are opposite. The forces cancel.
The net force on the 2.2 kg mass in the center is zero.
How much force must be applied for a 150.W motor to keep a package moving at 3.00m/s?
The force must be applied for motor to keep the package moving is 50 N.
What is force?Force is the action of push or pull the object in order to make it move or stop.
Power is related to force and velocity as
P = F x v
150 W = F x 3 m/s
F =50 N
Thus, the force must be applied for motor to keep the package moving is 50 N.
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Write One paragraph to discuss how you can apply to real life what you have learned from the Scientific Investigation you have conducted?
My topic is What makes ice melt faster?
the hot sun
hi
Explanation:
when its sunny (always in my city) then put ice on the sun (not directly to the sun) but where the sun shines
An object moves 4 meters north, then 3 meters east. What is the displacement of the object?
Answer:
5 meters
Explanation:
4 and 3 are legs of a right triangle with the hypotenuse = displacement
Use Pythagorean theorem
4 ^2 + 3^2 = (displacement)^2
displacement = 5 m
The displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.
What is displacement?
Displacement is change in the position of an object. It can be described as the shortest distance between the initial and final position of an object.
The displacement of the object is calculated as follows;
d² = 4² + 3²
d² = 25
d = 5 m
Thus, the displacement of the object that moved 4 meters north, then 3 meters east is 5 meters.
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When a potassium atom forms an ion, it loses one electron. what is the electrical charge of the potassium ion? −2 −1 1 2
The electrical charge of a Pottasium ion that loses one electron is +1. Details about charge of an ion can be found below.
How is the charge of an ion formed?An ion is an electrically charged atom. This charge is formed as a result of the difference between the number of protons and electrons in that atom.
According to this question, a potassium atom forms an ion by losing one electron. This means there will be one more proton than electron in the element.
Therefore, the electrical charge of a pottasium ion that loses one electron is +1.
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A pendulum is lifted to a height of 0.75 m. the mass of the bob is 0.2 kg. calculate the gpe at the top of the pendulum
White light is passed through a filter that only allows only yellow, green and blue light to pass through onto a piece of blue fabric. what color does the fabric appear to have under this light?
a.
red
c.
blue
b.
green
d.
black
Answer:
White light contains yellow, green, and blue - only the blue light will be reflected giving the blue color.
So the green and yellow light thru the filter will not be reflected and the fabric will still appear blue.
blue is correct
Select the correct answer from each drop-down menu. thermal energy moves from a to b by . heat transfer will continue until the liquid in b reaches temperature as the liquid in a.
The correct answer from each drop-down menu is thermal energy moves from A to B by conduction the heat transfer will continue until the liquid in B reaches the same temperature as the liquid in A.
What is a heat conductor?Good thermal conductors have an atomic or molecular arrangement that has the property of transferring heat to nearby atoms or molecules until the entire object is in thermal equilibrium. To understand better, let's take a metal bar as an example, which is a good thermal conductor.
In this case, the thermal energy moves from A to B by conduction the heat transfer will continue until the liquid in B reaches the same temperature as the liquid in A.
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Explain why you press against the seat when you take off fast at the beginning of the roller coaster ride. (Hint: relates to Newton’s first law)
Answer
When you are riding in a coaster car that is traveling at a constant speed, you only feel the downward force of gravity. But as the car speeds up or slows down, you feel pressed against your seat or the restraining bar. You feel this force because your inertia is separate from that of the coaster car.
Explanation:
