When looking in a funhouse mirror, your head appears twice as large as normal. If you are standing a distance d from the mirror, what is the mirror's
focal length?
a. d
b. 2d
c. 3d
d. 4d
Answers
When looking in a funhouse mirror, your head appears twice as large as normal and if you are standing a distance d from the mirror, then the mirror's focal length is c) 3d. Option c) is the correct answer.
To solve this problem, we need to use the mirror formula:
1/f = 1/di + 1/do
Where f is the focal length of the mirror, di is the distance of the image from the mirror, and do is the distance of the object from the mirror. We know that the image in the mirror appears twice as large as normal, which means that di = 2do.
Now we can substitute this into the formula:
1/f = 1/2do + 1/do
Simplifying this equation, we get:
1/f = 3/2do
Multiplying both sides by do/3, we get:
do/3f = 1/2
Solving for f, we get:
f = 2do/3
Since we know that the person is standing a distance d from the mirror, the distance of the object from the mirror is do = d.
Substituting this value into the equation for f, we get:
f = 2d/3
Therefore, the answer is option c, 3d.
To know more about focal length, refer
https://brainly.com/question/28039799
#SPJ11
Related Questions
.org
A string is tied with a 0.500 kg object and swung around a
person's head in a horizontal circle. The length of the string is
1.00 m. The maximum speed the object can be swung without
breaking the string is 7.07 m/s. What is the force the string can
withstand without breaking?
Answers
Answer: 25 N
Explanation:
Answer:
7.07 m/s
Explanation:
If your on ck12 like me this might be one of your answer choices, just got it correct so im sharing.
Can someone help me with this last question
Answers
A certain man needed 400N of force to pull a load through a distance of 150cm in 8 seconds. Calculate the work done and the power developed by the man
Answers
The work done by the man is 600J, and the power developed is 75W. When a certain man needs 400N of force to pull a load through a distance of 150 cm in 8 seconds, then work done can be calculated as follows;Work done = force x distance covered W = F x DD = 150 cm
= 1.5 m
F = 400 N
Substitute the above values in the work formula to get; W = 400 N x 1.5 m = 600 J So, the work done is 600 J Power is defined as the rate at which work is done. It can be calculated using the formula;Power = Work done / Time taken P = W / tP
= 600 J / 8 s
= 75 W
Therefore, the power developed by the man is 75 W.
To know more about Work done visit-
https://brainly.com/question/32263955
#SPJ11
Find the distance an object traveled if a force of 350 n acted on it to produce 0 work?
Answers
Force(F) = 350 N
Work (W)= 0 J
Apply the formula:
Work = Force x Distance
Isolate distance(d)
Distance = Work/ Force
d = W/F = 0 /350 = 0 m
The distance that the object traveled is 0 (zero)
It is a force that acts in a direction opposite to the motion of the moving object
Answers
The force that acts in a direction opposite to the motion of the moving object is called drag or air resistance.
Drag or air resistance is a force that acts on a moving object in a fluid medium, such as air or water, opposing its motion. It acts in a direction opposite to the motion of the object and is caused by the friction and pressure differences between the fluid and the object's surface. Drag force increases with the velocity of the object and its surface area, and it's usually modeled as a quadratic function of the velocity. For example, when a car is moving, the air resistance acts in the opposite direction of the car's motion, slowing it down. The drag force is not the only force that acts on the object, but it's one of the most significant forces acting on it, especially for objects moving at high speeds.
To know more about drag force click below:
https://brainly.com/question/12774964#
#SPJ4
a) Why does the amplitude of a compound motor action potential (CMAP) change when stimulus intensity was increased?
b) The minimum voltage needed to evoke a CMAP differed a small amount between the stimulus sites. Why? (Proximal = 21.34 mV ; Distal = 22.56 mV)
c) The experimental conduction velocity of the ulnar nerve (NCV) is 30 m/s, but in young healthy adults, it is about 60 m/sec. How does the conduction velocity you calculated compare with this value? If your value differs, what is one plausible explanation for this deviation from the literature value? You should explain how a specific error condition could have lead to the deviation from the expected value.
Answers
a) The amplitude of a Compound Motor Action Potential (CMAP) changes when stimulus intensity is increased because higher stimulus intensity leads to the recruitment of more motor units.
Motor units are the functional units of muscle contraction, consisting of a motor neuron and the muscle fibers it innervates. When a stimulus is applied to a muscle, initially only a small number of motor units are activated. As the stimulus intensity increases, more motor units are recruited, resulting in a larger overall muscle response and a higher CMAP amplitude.
The small difference in the minimum voltage needed to evoke a CMAP between the stimulus sites may be due to variations in nerve fiber excitability and electrode placement. Nerve fibers may have different thresholds for activation, and the location and positioning of the stimulating electrode can influence the effective stimulus intensity at different sites along the nerve pathway. These factors can contribute to slight variations in the minimum voltage required to elicit a CMAP response.
The calculated conduction velocity of the ulnar nerve may differ from the literature value of 60 m/s due to several reasons. One plausible explanation is the presence of a conduction block or nerve injury along the ulnar nerve pathway. A conduction block occurs when there is interruption or impairment of nerve conduction, resulting in a slower conduction velocity. This can be caused by nerve compression, inflammation, demyelination, or other pathological conditions.
If such a conduction block exists in the ulnar nerve of the subject being tested, it could lead to a deviation from the expected conduction velocity and a lower calculated value. Further diagnostic tests, such as nerve conduction studies or imaging, could help identify and evaluate the underlying cause of the deviation.
Learn more about amplitude here
https://brainly.com/question/3613222
#SPJ11
Q 1. Choose the correct answer.
Which scientist studied and wrote a thesis on convection currents?
Dietz
Tuzo-Wilson
Wegener
McKenzie
Answers
Answer:
Dietz
Explanation:
He is the guy you must justt be smart and know stuff.
Find the force that is necessary! Multiple choice. 8 points. Will give brainliest.
Answers
Answer:
F/6.
Explanation:
Let 'M' represent the mass of the block.
Let 'F' represent the force on earth.
Let 'a' represent the acceleration on earth.
Let 'Fm' represent the force on the moon.
Let 'am' represent the acceleration on the moon.
Recall:
Force (F) = mass (M) x acceleration (a)
F = M•a
Making M the subject
M = F/a
But,
Acceleration on the moon (am) = 1/6 acceleration (a) of earth.
am = 1/6a
Fm = M•am
M = Fm/am
M = Fm/(1/6a)
Since the mass of an object is constant,
Therefore,
Mass on earth = mass on moon
Mass on earth (M) = F/a
Mass on moon (M = Fm/(1/6a)
F/a = Fm/(1/6a)
Cross multiply
Fm × a = F × 1/6a
Divide both side by a
Fm = (F × 1/6a) /a
Fm = F/6
Therefore, the force necessary to give the moon bound block the same acceleration is F/6.
what type of image is formed when rays of light actually intersect?
Answers
When rays of light actually intersect, they form a real image. A real image is an image that can be projected onto a screen because it is formed by the actual intersection of light rays.
The real image is always inverted and smaller in size than the object being imaged. The distance between the real image and the lens or mirror that forms it is dependent on the distance between the object and the lens or mirror. Real images are formed by concave mirrors and convex lenses when the object is placed beyond the focal point, as well as by convex mirrors and concave lenses when the object is placed within the focal point.
Real images are used in many applications such as in microscopes, telescopes, and cameras. In these devices, the real image is projected onto a surface such as film or an electronic sensor, which captures the image and converts it into an electrical signal.
to know more about light rays. click this link
https://brainly.com/question/1030839
#SPJ11
A ball is dropped from a 10 story building (30.0 m). How long does it take to hit the ground?
Answers
a 5.1 kg cat and a 2.5 kg bowl of tuna fish are at opposite ends of the 4.0-m -long seesaw. how far to the left of the pivot must a 4.0 kg cat stand to keep the seesaw balanced?
Answers
The 4.0 kg cat must stand 1.9 meters to the left of the pivot to balance the seesaw. To keep the seesaw balanced, the torques on both sides of the pivot must be equal.
Torque is defined as force multiplied by distance from the pivot. The weight of the 5.1 kg cat and 2.5 kg bowl of tuna fish will exert a torque on the right side of the pivot, while the weight of the 4.0 kg cat on the left side will exert a torque on the left side of the pivot.
Let x be the distance the 4.0 kg cat stands from the pivot. Then, the torque on the right side is (5.1+2.5)kg * 4.0m = 30.4 Nm. To balance this, the torque on the left side must also be 30.4 Nm.
Therefore,
(4.0kg * x)m = 30.4Nm, and
x = 7.6m/4.0kg = 1.9m.
To know more about Torque visit:
https://brainly.com/question/31248352
#SPJ11
A golf ball of mass 0.045 kg is hit off the tee at a speed of 34m/s . The golf club was in contact with the ball for 3.50*10^-3s .
Find the impulse imparted to the golf ball.??
Find the average force exerted on the ball by the golf club.??
Express your answer to two significant figures and include the appropriate units.
Answers
The average force exerted on the ball by the golf club is 490 N.
Thus, F = p/t = 0.49 * 10³ N = 490 N.
Momentum is a metric for power and how challenging it is to stop an object. Zero momentum applies to any object that is not moving. tremendous, slow-moving objects have tremendous amounts of momentum.
A small, swiftly moving object also possesses a significant momentum. A bowling ball, for instance, has more momentum than a ping-pong ball if their velocities are equal.
This is because bowling balls are larger in mass than ping-pong balls.
Thus, The average force exerted on the ball by the golf club is 490 N.
Learn more about Average force, refer to the link:
https://brainly.com/question/24704743
#SPJ4
A mixture of h2 and he are in a 10. 0 l vessel at 273 k. The total pressure is 756 torr. What is the partial pressure of h2 in the vessel if xhe = 0. 75?.
Answers
The volume of He in the vessel is 10.
What is volume?Volume' is a mathematical of the quantity that shows the amount of three-dimensional space of a occupied by an object or a closed surface.
Aires total pressure of hydrogen helium 7 56. Star mole fraction of helium is 0.75. And we have to find out partial pressure of hydrogen because total pressure is given and mole fraction of helium is given. So eucalyptus first find out partial pressure of helium. So partial pressure of William is equal to mull faction of William multiplied by total pressure. So let us this PPT. So mole fraction of helium is zero points and favors for the question Total Price 37 56. So we are getting unsolved. Ng 5 to 67 30. This is the partial pressure of for helium. Now, to get the partial pressure of hydrogen, mm hmm will subtract Partial pressure of helium from parcel total pressure. So pity minus partial pressure of helium. Total pressure is 756 livered by minus 5 67. So you are getting 1 89 thought. So, this is the first part of the question. , since the volume a vessel is since the volume of the cell is telling you that this must be the volume of Helium. Also, therefore, volume of William, volume occupied by the William is also 10 liter and volume occupied by Harrison is also 10 later because a gas occupies the entire volume in a vessel.
To know more about volume click-
https://brainly.com/question/463363
#SPJ4
The partial pressure of H2 = 189 torr
What is partial pressure of a gas?
If a container is filled with more than one gas, each gas will exert pressure, which is known as partial pressure.
It is given by the product of mole fraction and total pressure
Mole fraction of XHe = 0.75
XH2 + XHe = 1
XH2= 1-0.75
XH2= 0.25
partial pressure = mole fraction x total pressure
partial pressire of H2 = 0.25 x 756 torr
Therefore partial pressure of H2 = 189 torr
To learn more about partial pressure below is the given link:
https://brainly.com/question/14119417#:~:text=This%20is%20an%20Expert%2DVerified%20Answer&text=The%20total%20pressure%20exerted%20by,partial%20pressure%20of%20individual%20gases.
#SPJ4
help me to answer this please
Answers
Answer:
ok
Explanation:
A circuit with a battery, a 14 Ω resistor, and a 17 Ω resistor, in parallel. The total current is the system is 2.8 A. What is the voltage of the battery?
Answers
Given data:
* The total current in the system is I = 2.8 A.
* The resistance of resistors connected in parallel is,
\(\begin{gathered} R_1=14\text{ ohm} \\ R_2=17\text{ ohm} \end{gathered}\)Solution:
The equivalent resistance of the system is,
\(\frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}\)Substituting the known values,
\(\begin{gathered} \frac{1}{R_{eq}}=\frac{1}{14}+\frac{1}{17} \\ \frac{1}{R_{eq}}=\frac{17+14}{14\times17} \\ R_{eq}=\frac{14\times17}{17+14} \\ R_{eq}=7.68\text{ ohm} \end{gathered}\)According to Ohm's law, the voltage across the battery in terms of the current and equivalent resistance is,
\(\begin{gathered} V=IR_{eq} \\ V=2.8\times7.68 \\ V=21.5\text{ volts} \end{gathered}\)Thus, the voltage across the battery is 21.5 volts.
Approximately how long does it take the uterus lining to build up again after menstruation
Answers
The uterus lining is rebuilt by the end of the menstrual period. The rebuilding of the uterus lining starts after menstruation and the lining is typically completely rebuilt by day 14 of the menstrual cycle, which is when ovulation occurs and the uterus is preparing to potentially receive a fertilized egg.
The endometrium is the inner lining of the uterus, and it thickens every month to prepare for pregnancy. After menstruation, the endometrium grows and thickens to prepare for the implantation of a fertilized egg. The cells in the lining multiply and enlarge, and the glands in the lining begin to secrete mucus and other substances that help support the fertilized egg and promote its growth.
The rebuilding of the endometrium usually takes about two weeks after menstruation. This process is closely regulated by hormones such as estrogen and progesterone, which are produced by the ovaries and other parts of the body. These hormones help control the growth and development of the endometrium and other reproductive tissues.
To know more about ovulation visit:
https://brainly.com/question/31872360
#SPJ11
Which occurs when a warm fluid cools down?
⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔⇔
Answers
Answer: Energy is released to the environment.
Explanation:
A pendulum swings back and forth. If the mass of the pendulum is 3kg and it starts from a height of 1m.How much kinetic energy does it have at 0.5m?
Answers
From the principle of energy conservation, the kinetic energy of the pendulum at 0.5 m is 14.7 J.
What is a pendulum?A pendulum swings back and forth and can be used to show the change of potential energy to kinetic energy and vice versa.
Given that the kinetic energy is converted to the potential energy; the potential energy at 0.5 m is 3 * 9.8 * 0.5 = 14.7 J.
Following the principle of energy conservation, the kinetic energy of the pendulum at 0.5 m is 14.7 J.
Learn more about pendulum:https://brainly.com/question/14759840
#SPJ1
1st question:Car stop 46 m force friction bringing stop 428 N how much done on the car?
2nd question: 12kg rock 3m above ground what is potential energy of the rock ?
Answers
(1) The amount of work done by force of friction on the car is 19,688 J.
(2) The potential energy of the rock is 352.8 J.
How much work is done on the car?
The amount of work done by force of friction on the car is calculated as follows;
W = Ff x d
where;
Ff is the force of frictiond is the displacement of the carW = 428 N x 46 m
W = 19,688 J
The potential energy of the rock is calculated by applying the following formula as shown below.
P.E = mgh
where;
m is the mass of the rockh is the height of the rockP.E = 12 x 9.8 x 3
P.E = 352.8 J
Learn more about potential energy here: https://brainly.com/question/1242059
#SPJ1
A semi truck has a velocity of 28m/s when it comes to a stop over 342m. What is the acceleration of the truck?
Answers
Velocity Final - Velocity Initial
————————————————-
Distance
Vf =0m/s because truck came to complete stop
Vi=28m/s
D=342m
0-28
——— =28.1m/s^2
342
difference between national park and wild life reserve
Answers
Answer:
wildlife reserves are not available for camping...but you can camp at a skatepark
When you kick a ball by a force of 26.3 Newton’s, what is the magnitude and direction of the force that you experience?
Answers
Answer:
As there are two objects applying forces to each other they must be equal and opposite.
Thus the force on your foot will be precisely 26.3N in a direction
180
∘
to the direction of travel of the ball.
Explanation:
Kiran's mother placed a candle in the bowl as shown and lit it . A little while later , kiran opened a bottle of pepsi and poured it quickly into the bowl .What will happen ?
Answers
Answer:
The candle stick flame will burn brighter.
Explanation:
I majored in Physics.
I will name you the brainliest if you please help me.
Which formula is correct for calculating the ideal mechanical advantage?
Please help me.
Answers
effort distance/resistance distance or length of ramp/height of ramp or dE/dr is correct for calculating the ideal mechanical advantage
Theideal mechanical advantage would not have any friction. this is due to the fact that some of the effort put into the machine is lost trying to overcome friction.
ideal mechanical advantage is denoted by the sign IMA, that ignores the drawbacks of friction.
The force amplification achieved at "ideal" MA is measured without accounting for efficiency losses. Theoretically, a straightforward method might accomplish this level of amplification.One of the simplest representations of a mechanical advantage is a lever. You may model the mechanical advantage as follows:where the mechanical advantage corresponds to the a/b ratio. This is an illustration of a "perfect" mechanical advantage since no additional power is provided to the system or efficiency losses occur. The connection between the fulcrum and the lever would, at the very least, have some friction, which would dissipate part of the force amplification and produce a mechanical advantage that was less than optimal.To know more about ideal mechanical advantage visit : https://brainly.com/question/6968974
#SPJ1
What is the product of a male and a female parent 
Answers
This is true for most sexually reproducing organisms, including humans. The male parent provides sperm which contains half of the genetic information (or chromosomes) necessary for reproduction, and the female parent provides an egg which also contains half of the necessary genetic information. When the sperm and egg combine during fertilization, they form a new organism with a unique combination of genetic traits inherited from both parents.
5 A swimming pool is 50m long. A
swimmer covers it in 50s. Calculate
the average speed of the swimmer.
Answers
the answer is 150 000 s2
The average speed of the swimmer is equal to 1 m/s.
What is the average speed?The average speed can be defined as the total distance traveled by the object in a specific time interval. The average speed can be defined as a scalar quantity as it possesses only the magnitude and does not have any direction.
The average speed can be determined from the ratio of the total distance the object covers to the time taken to travel that distance.
The equation for average speed can be written as follows:
Average speed = Total distance/Total time taken
Given, the distance covered by the swimmer = 50 m
The total time taken by the swimmer = 50 sec
The average speed of the train = 50/50 = 1 m/s
Therefore, the average speed of the swimmer is equal to 1 m/s.
Learn more about the average speed, here:
brainly.com/question/12322912
#SPJ2
which statement regarding ohm's law is correct? group of answer choices if resistance is kept constant, potential difference (voltage) changes directly with changes in current when resistance increases in a circuit with a specific potential difference then current must also increase increasing the resistance in a circuit always decreases the potential difference (voltage) across it an electrical conductor's resistance depends on the potential difference (voltage) it experiences
Answers
The correct statement regarding Ohm's law is that if resistance is kept constant, potential difference (voltage) changes directly with changes in current. This means that as the current in a circuit increases, the potential difference (voltage) also increases proportionally, as long as the resistance remains the same.
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists. E = I x R.
to know more about Ohm's law click this link -
brainly.com/question/12865879
#SPJ11
It took 50 joulss to push a char 5 meters across the floor. With what force was the chair pushed?
Answers
Answer:
10 newtons
Explanation:
Work = Force * Distance
50 J = F * 5m
F = 50 / 5 = 10N
What are examples of devices that use electromagnetic waves? Check all that apply.
FM radios
microwaves
TV remote controls
alarm clocks
X-rays
Answers
Answer:
FM radios
Microwaves
Tv remote controls
X-rays
(Hope this helps)
Explanation:Its on edge
All these devices use electromagnetic waves:
FM radios Microwaves TV remote controls X-raysWhat are EM Waves?
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. Also, EM waves are composed of oscillating magnetic and electric fields.The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.Therefore, all devices except alarm clocks has electromagnetic waves.
Learn more:
brainly.com/question/24545765
What is the magnitude of the acceleration of a proton that is 0.70 cm from the center of the bead?
Answers
The acceleration of the proton by using Coulomb's law is 2.806 m/s²
The acceleration of a proton can be defined by using coulombs force and centripetal acceleration. The value of coulomb force is
Fc = k.q1.q2 / d²
where Fc is coulomb force, k is Coulomb's constant, q is charge and d is distance.
Centrifugal force will also same as coulomb force, which can be determined as
F = m.a
where F is centrifugal force, m is mass and a is acceleration.
From the question above, we know that:
q1 = q2 = e = 1.602176634×10‾¹⁹ C
k = 8.988×10⁹ N⋅m²⋅C‾²
m = 1.673 x 10‾²⁴ kg
d = 7 x 10‾³ m
By combining these equations, we get
F = Fc
m.a = k.q1.q2 / d²
a = k.e² / m.d²
Substitute the parameter
a = 8.988×10⁹ . (1.6×10‾¹⁹)² / ( 1.673 x 10‾²⁴ . ( 7 x 10‾³ )² )
a = 2.806 m/s²
Hence, the acceleration of the proton by using Coulomb's law is 2.806 m/s²
Find more on Coulomb's law at: https://brainly.com/question/66110
#SPJ4