Answer:
Find the original location of the decimal.
Determine if the number will be positive or negative.
Move the decimal point until it creates a number between one and ten.
Count how many times you moved the decimal.
Explanation:
A circuit has a current of 1. 2 A. If the voltage decreases to one-third of its original amount while the resistance remains constant, what will be the resulting current? 0. 3 A 0. 4 A 1. 2 A 3. 6 A.
If the voltage decreases to one-third of its original amount while the resistance remains constant. The resulting current will be 0.4 A.
What is current?The current is the stream of electrons flowing from positive terminal of the battery to the negative terminal so as to generate electricity.
The circuit has a current of 1.2 A.
When the resistance is constant, the voltage is proportional to current. According to the ohm's law,
V₂ / V₁ = I₂ / I₁
Substitute V for V₁ , V /3 for V₂ , 1.2 for I₁ , we get the resulting current,
I₂ = 0.4 A
Thus, the resulting current will be 0.4 A.
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Mr. Galonski just discovered that he has been turned into a superhero and is now one hundred times more acidic than water! He then found out that he has an arch-nemesis named Baron von Base who has a pH of 11. Using this information, who would be furthest from neutral on the pH scale and therefore "stronger"?
pH water = 7 = [H⁺] = 10⁻⁷
Mr. Galonski one hundred times more acidic than water = 100 times more H⁺ = 10⁻⁵ ⇒ pH = 5
Baron von Base has a pH of 11
The furthest from neutral (pH=7) on the pH scale = Baron von Base
Dust, accumulated at the time of the formation of the solar system is sometimes preserved in asteroids, meteoroids, and meteorites. what are these pockets of early solar system materials called
The dust, accumulated at the time of the formation of the solar system that are preserved in asteroids, meteoroids, and meteorites are called chondrules.
What is the solar system?The solar system is composed of the earth and the planets. The solar system was formed millions of years ago.
The dust, accumulated at the time of the formation of the solar system that are preserved in asteroids, meteoroids, and meteorites are called chondrules.
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Q: Explain the shape of the I-V graph of the filament lamp?
Answer:
initially- with positive potential differences - the current is directly proportional to the p.d. However, as the current through the filament increases, the heating effect caused in the lamp also increases and so the temperature of the filament rises. This increase in the filament's temperature also increases the resistance of the filament. As a result the rate of increase of the current decreases and a greater change in the potential difference is required to cause a change in the current. This can be seen on the curve as the gradient becomes more shallow (greater resistance). This same pattern is repeated when a negative potential difference is applied across the filament
What type of galaxy is this?
Answer:
Barred Spiral.
1.Some objects fall faster than other objects due to ____ _________________. If there is no ____ _________________, then all objects will fall at the same rate.
2.
a. How do parachutes use air resistance to help skydivers land safely (page 3)?
b. Which has more air resistance: a flat sheet of paper or a paper airplane (feel free to test it out!)? Explain your answer.
Answer:
number 1 is ( Some objects fall faster than other objects due to air resistance . If there is no air resistance , then all objects will fall at the same rate.) number two is (How do parachutes use air resistance to help skydivers land safely (page 3)? The air resistance overwhelms the doward force of gravity.) Explanation:
O.A. (Opinionated Answer): What is your take on dimensions and altered realities. Where do you think youd find them? do you believe in them? and how would time shift or alter?
you cant what done is done unless you start over. well think of a game it is its own dimension created by man for our entertainment but its not perfect there are glitches and modifications. but you are not the main character only one is and He gives us our own controler our brain. but if your athiest then ask me in the comments. i can explain both ways
Answer:
The world as we know it has three dimensions of space—length, width, and depth—and one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics models of the last half-century, the universe operates with 10 dimensions. A dimension arises when a force is generated that allows movement into a new domain. Yes, I personally do believe in them for reasons I can't explain. Dimensional shifts were a phenomenon whereby an object or person is transported from one location to another via folded-space transport or shifted to a parallel universe on a different dimensional plane.
Explanation:
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Q7 A fishing vessel travels a distance of 6 nautical miles at a speed of 8 knots.
It then anchors for one hour, before travelling a further 5 nautical miles, in
45 minutes, to the next fishing ground. It anchors for 30 minutes before
sailing 1 hour back to port.
1 knot = 1 nautical mile per hour,
12
[a] Draw the distance-time graph for
the fishing vessel.
10
[b] What was the vessel's average
speed for the entire journey?
6
Distance from shore (nautical miles)
4
2
0
1
4
2 3
Time (hours)
The vessel's average speed for the entire journey will be 5.86 knots. The area of the distance-time graph shows the velocity.
What is distance?Distance is a numerical representation of the distance between two objects or locations.
Distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.
The given data in the problem is;
Distance travelled 1 (D₁)= 6 nautical miles
Velocity (V₁) 8 knots.
Time (T₁)=
Distance travelled 2 (D₂)=5 nautical miles,
Time taken(T₂)=45 minutes=0.75 hour
Time taken(T₃)=30 minutes
Time for anchor 1 (t₁)=1 hour
Time for anchor 2(t₂)=0.5 hour
Time to sailing back to port(t₄) = 1 hour
The time for the first phase of motion;
[tex]\rm d = v\times t \\\\ t_1= \frac{D_1}{v} \\\\ t_1= \frac{6}{8} \\\\ t_1= 0.75 \ houe[/tex]
The average speed is found as;
[tex]\rm V_{avg}= \frac{Total \ distance }{Total \ time } \\\\ \rm V_{avg}= \frac{6+5+6+5}{0.75+0.5+1+0.5+1} \\\\ V_{avg}=5.866 \ knots[/tex]
Hence, the vessel's average speed for the entire journey will be 5.86 knots.
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Find the change in kinetic energy if if a 0. 65 kg fish leaping to the right a 15 m/s
The value of change in kinetic energy, when fish with mass 0. 65 kg is leaping to the right at 15 m/s, is 93.1 J.
What is kinetic energy?Kinetic energy is a type of energy, which a body is posses due to its motion. The kinetic energy of a body can be found with the following formula,
[tex]KE=\dfrac{1}{2}mv^2[/tex]
Here, (m) is the mass of the body, and (v) is the speed of the body.
When the two objects collides, then the initial collision of the two body is equal to the final collision of two bodies by the law of conservation of momentum.
[tex]m_1u_1 + m_2u_2 = (m_1+m_2)v[/tex]
Here, (m) is the mass, (u) is initial velocity before collision, v is final velocity after collision and (subscript 1,2) are used for fish 1 and 2.
The mass of the first fish is 0. 65 kg. This fish leaping to the right at 15.0 m/s collides inelastically with another fish with mass 0.950 kg leaping to the left at 13.5 m/s. Put the values,
[tex]m_1u_1 + m_2u_2 = (m_1+m_2)v\\0.65\times15 +0.95\times(-13.5) = (0.65 + 0.95)\times v[/tex]
The value of initial velocity of the second fish is taken negative as it is leaping to the left.
[tex]0.65\times15 +0.95\times(-13.5) = (0.65 + 0.95)\times v\\v=-\dfrac{3.075}{1.6}\\v=-1.9219\rm\; m/s[/tex]
This is the final velocity. Now to find the change in kinetic energy use the formula of kinetic energy,
[tex]\Delta KE=\dfrac{1}{2}(0.65)(12-(-1.9219))^2\\\Delta KE=93.1\rm\; J[/tex]
Thus, the value of change in kinetic energy, when fish with mass 0. 65 kg is leaping to the right at 15 m/s, is 93.1 J.
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A dolphin accelerates at -1.77m/s^2 for 3.33s and ends with a velocity of -8.77m/s. What is the displacement of the dolphin in that time
Answer:
-19.39
Explanation:
The displacement of the dolphin in that time will be34.2826m.
To find the displacement of the dolphin, we can use the equations of motion. The displacement can be calculated using the following equation:
d = v initial(t) + 1/2at²
We are given that,
Acceleration (a) = -1.77 m/s² (negative because it's decelerating)
Time (t) = 3.33 s
Final velocity (final v final) = -8.77 m/s
To find the initial velocity, we can use another kinematic equation:
final= Vinitial + Vfinal =v initial +at
Now, plug in the values:
v initial= − 8.77m/s − ( −1.77m/s²)× 3.33s
v initial=−8.77m/s−(−1.77m/s²)×3.33s
v initial =- 2.8769m/s
Now that we have the initial velocity, we can find the displacement using the first equation:
d = v initial(t) + 1/2 at²
d = - 2.8769m/s × 3.33 s + 1/2(-1.77 m/s²) × 3.33s
d = - 34.2826m
The displacement of the dolphin in that time is - 34.2826m. The negative sign indicates that the displacement is in the opposite direction of the initial velocity.
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anyone could answer this question
Which statement below is
INCORRECT about volume?
A. Volume is the amount of space that an object
occupies.
B. The volume of an object is the same as the
weight of that object.
C. Volume can be measured in cubic
centimeters.
D. Volume is calculated using a formula: Volume
= length x width x height
Answer:
B. The volume of an object is the same as the
weight of that object.
Explanation:
Every thing else is right and that one is wrong.
Answer:
B. The volume of an object is the same as the
weight of that object.
Explanation:
i hope it helps
What is the force advantage of the direction changing pulley shown below?
Select one:
a. Less than 1.
b. 1.
c. Greater than 1.
d. Greater than 10.
The force advantage of the direction changing pulley shown is 1. The correct option is b.
What is force advantage?Force is the mechanical physical quantity. The force advantage is equivalent to the mechanical advantage equal to the ratio of output to the input force.
In the single fixed pulley, there is only one rope segment that pulls up on the load, so,
The force advantage is
F.A = 50 N / 50 N = 1
Thus, the force advantage of the direction changing pulley shown is 1. The correct option is b.
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If the volume of a container of gas is reduced, what will happen to the pressure inside the container?.
Answer:
The pressure of the gas will increase
Explanation:
When gas is put into a container, for example, a balloon, the gas expands to fill the space it can occupy. Since gas is not a solid or a liquid, its particles are all over the place - they are constantly moving and vibrating. As such, when too much gas is blown into a balloon, it will pop. So, when the volume of the container decreases, the pressure of the gas will increase the smaller it gets. Vice versa, the greater the space, the less pressure that will be present in the container.
If the plant produces electric energy at the rate of 1. 5 gw , how much exhaust heat is discharged per hour?
The amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.
How to calculate the heat discharged per hour?The heat is discharged per hour is equal to the different of total power and actual power.
The plant produces electric energy at the rate of 1. 5 gw. Let assume the efficiency of this power plant is 64% between the temperature of 660 degree C to 330 degree Celsius.
Thus, the maximum efficiency is,
[tex]\eta_{max}=1-\dfrac{660+273}{330+273}\\\eta_{max}=0.55[/tex]
The total power is,
[tex]P_t=\dfrac{P_A}{\eta_{max}\times0.64}\\P_t=\dfrac{1.5}{0.55\times0.64}\\P_t=4.26\rm\; GW[/tex]
Thus, the heat discharged per hour is,
[tex]Q=4.26-1.5\\Q=2.76\text{GW}\\[/tex]
Multiply the value with 3600 to convert it in s/h,
[tex]Q=2.76\times10^9\times3600\text{ J/h}\\Q=9.36\times10^{19}\text{ J/h}\\[/tex]
Thus, the amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.
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Explain why Earth is not a perfect sphere?
Earth surfaces are not all the same.
Earth's surface is smooth.
The Earth's shape bulges in the equator.
The Earth's atmosphere has affected its shape
A 197 g object apparently loses 34 g when fully submerged in a liquid of density 2.3 g/cm3. What is the density of the object
Answer:
13.33 gm/cm^3
Explanation:
Displacement of liquid =
34 gm / 2.3 gm/cm^3 = 14.783 cm^3
so the VOLUME of the object is 14.783 cm^3
density = 197 gm / 14.783 cm^3 = 13.33 gm/cm^3
Find the energy per second received by an eardrum when it listens to sound that is at the threshold of hearing
The energy per second received by an eardrum will be 5.03×10⁻⁵ J/sec. The energy denotes the sound energy for the eardrum.
What is sound energy?The passage of vibrations through matter is characterized as sound energy. When an item vibrates, sound energy is created, resulting in noise.
Sound vibrations induce pressure waves to flow through a material like air, water, wood, or metal.
The threshold of hearing is,5×10⁻¹⁷ sec.
The energy per second received by the eardrum is found by the formula as;
[tex]\rm E_T = Area \times thresold \\\\ \rm E_T = \pi (4 \times 10^{-3})^2 \times 1 \times 10^{-12} \\\\ E_T =5.03 \times 10^{-17}\\\\[/tex]
Hence, the energy per second received by an eardrum will be 5.03×10⁻⁵ J/sec
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What are the properties of a good conductor
The Properties of good conductor are given below:
Explanation:
1.It posses very low resistance or specific resistance.
2.It posses more conductance and there by conducts electricity readily through it.
3.It is a good conductor of heat.
4.It is highly resistance to corrosion by liquid.
5.It must be malleable and ductile.
6.It must be flexible.
7.It should not react with climatic conditions.
8.It can be drawn in very fine wires.
What do Newton's three laws state?
When two forces act in opposite directions, then net force acting due to two
forces
a. sum of two factors
b. difference between two factors
c. both of these
d. none of these
Answer:
option b
Explanation:
when the two forces act in opposite directions there effective magnitude decreases.
Answer:
b. difference between two factors
Explanation:
When two forces act in the opposite directions, the net force is the difference between them.
help me please.....●_●
Answer:
Length -> meter
Mass -> kilogram
Time -> second
g for gram
mg for milligram
t for time
μm for micrometer
ms for millisecond
300cm = 3m
500g = 0.5kg
1500m = 1.5km
250ms = 0.25s
3.65×10^4g = 36.5kg
1. How should you begin an exercise routine?
by increasing endurance
by eating
Hard right from the start
By stretching
2. True or False. You have to go to the gym to get exercise.
True
False
3. Which of the following is an advantage to exercising?
building stronger muscles and bones
increasing blood pressure
increasing body fat
4. Which of the following is an example of exercise?
riding your bike
watching basketball
playing chesss
Answer:
1. By streching
2. false
3. building stronger muscles and bones
4. riding your bike
Explanation:
The routine of exercise begins with the usual basic step of stretching the body.
What is meant by exercise ?An essential component of a healthy lifestyle is exercise. Exercise can help you cope with stress and prevent health issues while also enhancing energy and strength. It can also help you control your appetite and keep your weight in a healthy range.
Here,
1. The routine of exercise begins with the usual basic step of stretching the body.
2. People don't have to necessarily go to the gym to get exercise, because exercise includes the activities from the basic one to difficult methods. So, you can do some kind of exercise at the home itself. So, the statement is false.
3. An advantage to exercising is building stronger muscles and bones.
4. Riding your bike is an example of exercise.
Hence,
The routine of exercise begins with the usual basic step of stretching the body.
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A spring-loaded ballistic cart measuring 0.5 kg is in contact with a second 0.8 kg cart. The carts are
initially at rest on a level surface. The spring is released and the lighter cart is observed to move at +0.4
m/s afterward. What is the velocity of the other cart?
A spring-loaded ballistic cart is in contact with a second cart. The velocity of the other cart is 0.25 m/s.
What is the conservation of linear momentum?When there is no external force acting on the system, the initial momentum is equal to the final momentum.
Momentum is equal to the product of mass and its velocity.
According to the conservation of linear momentum,
m₁v₁ +m₂v₂ = m₁u₁ +m₂u₂
u and v represents the initial and final velocity. 1 and 2 represents the first and second cart.
Given is m₁ = 0.5 kg, m₂ =0.8kg, u₁ =u₂ =0 m/s and v₁ = 0.4 m/s.
Substituting the values in the conservation of momentum equation, we get the velocity of second cart is
0.5 x 0.4 + 0.8 x v₂ = 0.5 x 0 + 0.8 x 0
v₂ = +0.25 m/s (in the direction of first cart)
Thus, the velocity of the other cart is 0.25 m/s.
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d. We should always measure the least count of tool before experimenting. Discuss the importance of calculating least count of tools before experimenting.
The count of the number of tools is fundamental because it allows us to design a suitable experimental procedure.
What is an experimental procedure?An experimental procedure is a step of the scientific method based on a process to validate or reject our working hypothesis.
The experimental procedure needs to have into account the different tools required for the experiment to be carried out by the researcher.
In conclusion, the count of the number of tools is fundamental because it allows us to design a suitable experimental procedure.
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A boat has a mass of 54,000 kg. The boat is accelerating at 0.4 m/s2. What is the net force acting on the boat?'
Answer:
21.6 kN
Explanation:
F = m * a
F = 54 000 * .4 = 21600 N
Answer:54,000 N
Explanation:
Voltage is only produced when the wire is moving but not when the magnet is moving.
True
False
True,Voltage is only produced when the wire is moving but not when the magnet is moving.
What is electromagnetism ?The physical interplay of electric charges, magnetic moments, and the electromagnetic field is known as electromagnetism.
The electromagnetic field can be static, moving slowly, or forming waves. Electromagnetic waves are commonly referred to as light and are subject to optics laws.
True,Voltage is only produced when the wire is moving but not when the magnet is moving.
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A car is driving at constant speed down the road. The mass of the car is 1350 kg and the coefficient of rolling friction is 0.18? How much engine force is needed to keep the car moving?
Answer:
2381.4 N
Explanation:
1350 * 9.8 * .18 = 2381.4 N
What happens when two
electrons get close
together?
Answer:
when two electrons are in close proximity Each atom's electron begins to detect the proton of the other atom. As a result, it is attracted to not just its own proton, but also the proton of the other atom.
What is inertia?
a. a type of kinetic friction
b. the normal force on ah incline
c. the tendency of an object to maintain its state of motion
d. the reaction to an action force