Answers
Answer:
6.0cm
Explanation:
Given
focal length = 15.0cm
object distance = 10.0cm
Required
Image distance v
Using the formula
1/f = 1/u + 1/v
1/15 = 1/10+1/v
1/v = 1/15 + 1/10
1/v = 2+3/30
1/v = 5/30
v = 30/5
v = 6.0cm
Hence the image distance is 6.0cm
Answer:
6.0 (2 sig figs)
Explanation:
Is it General Physics? I had it and passed the Final Exam with an A in the beginning of July!
Related Questions
PLEASE HELP!! Points will be given for suitable answer! Thank you!
Answers
Answer:
its lost 91
Explanation:
An electromagnet is a device that uses an electric current to produce a magnetic field.
Electromagnets are typically composed of a piece of metal wrapped with wire and connected to a battery. The battery provides the electric current, and the loops or coils of wire enhance the magnetic field. The more loops there are, the stronger the magnetic field.
When electric current flows through the electromagnet, the metal core becomes magnetized, so it possesses a north pole and a south pole.
Motors place electromagnets inside of permanent magnets as shown below.
However, motors are designed so that the polarity of the electromagnet constantly flips. That is, the north pole becomes the south pole, and the south pole becomes the north pole, every time the electromagnet turns 180 degrees.
Why is it designed this way?
A.
to conserve the energy in the battery
B.
to constantly polarize the field magnet
C.
so the electromagnet will continuously turn
D.
so the magnetic field will get stronger
Answers
The reason why motors are designed so that the polarity of the electromagnet constantly flips.is
C. so the electromagnet will continuously turn
Why is motor designed that wayThe reason motors are designed so that the polarity of the electromagnet constantly flips is to continuously turn the electromagnet. This allows the motor to rotate continuously, rather than becoming stuck in one position.
The flipping of the polarity causes the electromagnet to attract and repel from the permanent magnets, creating a rotating motion.
Therefore, the correct answer is C.
Learn more about motors at:
https://brainly.com/question/18619348
#SPJ1
5. What type of sound wave shape forms behind an object traveling faster than the speed of sound?
- a cone
- a long, flat tail
- a bowl-shape
- a sphere
Answers
Scavengers are organisms that help clean a habitat by feeding on dead or rotting flesh. They help break down the remains left behind by carnivores. Vultures and maggots (baby flies) are common scavengers.
Decomposers are organisms that break down the remains of dead animals or plants. Many live in or on the soil. Fungi and bacteria are examples of decomposers.
Which of the following is an example of decomposers at work?
a. a fish eating dead seaweed floating in the water
b. a vulture picking apart a dead mouse in the woods
c. a squirrel gnawing at a dead bird on the ground
d. a fungus growing on a rotten tomato, breaking down its skin
Answers
Answer:
I think no B
if wrong correct me pls
have a nice day
#Captainpower
좋은 하루 되세요
#캡틴 파워
Answer: B
Explanation:
Vultures and maggots (baby flies) are common scavengers. Decomposers are organisms that break down the remains of dead animals or plants. ... Green plants are called producers because they take energy from sunlight and produce food in which the energy is stored.
A wave is travelling at 3000 m/s has a wavelength of 1 m.
a) Calculate the frequency of the wave.
b) Calculate the time period of the wave.
c) How many complete wave cycles will occur in:
i. 1 second
ii. 10 senconds
iii. 1 minute
Answers
Answer:
a] 3000hz
b]3.33 × 10⁻⁴
ci]300
ii] 3000
iii]60,000
Explanation:
If a wave is travelling at 3000 m/s and has a wavelength of 1 meter the frequency of the wave would be 3000 Hz and the time period of the wave would be 3.33×10⁻⁴ seconds.
What is the frequency?It can be defined as the number of cycles completed per second. It is represented in hertz and inversely proportional to the wavelength.
Frequency = 1/T
As given in the problem If a wave is travelling at 3000 m/s and has a wavelength of 1 meter,
The frequency of the wave would be 3000 Hz.
The time period of the wave would be 3.33×10⁻⁴ seconds.
There would be 3000 complete wave cycles in 1 second, 300 wave cycles in 10 seconds, and 50 wave cycles in 1 minute.
To learn more about frequency from here, refer to the link;
brainly.com/question/14316711
#SPJ2
what is the conclusion of coin and feather experiment?
Answers
Answer:
So the conclusion is that in presence of air net force acting downward reduces for feather and hence falls slower than coin. But in absence of air resistance, net downward force is just equal to force due to gravity which is same for both coin and feather and hence they fall down at the same rate.
How can the power of an object required to lift a mass up a height be increased ?
A .reduce the height
B .reduce the mass
C .increase the time
D .reduce the time
Answers
The amswer should be B. reduce the mass
PLEASE HELP!!!!!!!!
An object's mass increases, multiplied by a factor of 6. What factor would its Kinetic Energy increase by?
Answers
Answer:
6 also
Explanation:
Since Kinetic Energy and mass are directly proportional, as one increases, the other will increase with the same magnitude
1. बालू के एक कण की त्रिज्या 1.6 x 10-4मी है। इस कण की त्रिज्या
ऐंग्स्ट्रॉम में होगी
(a) 1.6x106A
तन (b) 1.5x106A
(c) 14x10A
(d)1.2x106A
Answers
Answer:
BOIIII english????
Explanation:
Which three elements have the most similar chemical properties?
A. O, N, Si
B. K, Rb, Cs
C. Ar, Kr, Br
D. B, C, N
Answers
Which of the following depicts xylem?
Answers
The frequency of a wave is 2 Hz and the wavelength is 4 m. What is the wave speed?
Answers
Answer:
4/2=2m/s
Explanation:
What is the mass number, symbol, and charge of an ion that contains 35 protons, 45 neutrons and 36 electrons?
Answers
Bromine contains 35 protons, 36 electrons, and 45 neutrons. The mass number of Bromine is 80. The ion charge of bromine is +7. "Br" is the symbol of Bromine.
Discussion about bromine:
Two chemists, Carl Jacob Löwig and Antoine Balard, independently discovered bromine in 1825 and 1826, respectively.
The chemical element bromine has the atomic number 35 and the symbol Br. It is the 3rd halogen, and at room temperature, it is a flammable red-brown liquid that easily evaporates to create a vapor of a similar color. Its characteristics fall in between those of iodine and chlorine.
Due to its high reactivity, elemental bromine does not naturally occur in its free form but rather as crystals minerals halide salts that are colorless and soluble, similar to table salt. Although the bromide ion (Br) is relatively uncommon in the Earth's mantle, its great solubility has led to its buildup in the seas.
Learn more about bromine here:
https://brainly.com/question/1952132
#SPJ1
List out of how animals and plants can cause weathering.
Plants
Answers
who discovered electricity
Answers
Answer:
Benjamin Franklin
Explanation:
sorry if wrong.
I don't know who it is surely.
The periodic wave in the diagram below has a frequency of 80. hertz.
What is the speed of the wave? (1) 13 m/s (2) 60. m/s (3) 27 m/s (4) 120 m/s
Answers
Answer:
hi how are you
2) 5/8
4) 5/8
Aluminium + hydrochloric acid =
Answers
Answer:
Aluminum hydrochloric acid
Explanation:
Aluminum reacts with diluted hydrochloric acid at room temperature. The metal aluminium dissolves in hydrochloric acid, producing aluminum chloride and colorless hydrogen gas. The reaction taking place between aluminium and hydrochloric acid is irreversible. And the final products will not react with each other.
If the battery has a voltage of 24 Volts, Find the current when switch is closed.
Answers
Answer:
6amps
Explanation:
The question is not complete
Given data
voltage= 24volts
Say we have a resistance of 4 ohms
We can then find the current using the formula
V= IR
substitute
24= I*4
I= 24/4
I= 6 amps
Hence the current when the voltage is 24volt and a resistance of 4 ohms is
6amps
mercury is the closest planet to the sun, but its mean temperature is only 67°C. why is this?
Answers
Explanation:
Mercury is the closest planet to the sum, but its mean temperature is only 67°C. This is because Mercury has almost no atmosphere to hold in heat and keep the surface warm.
Hope it will help :)❤
The metric unit that is most often used to describe weight is the _________
Answers
Answer:
mass
Explanation:
mass is used in measuring weight. for example kg, tonnes
If you were to throw one show with a force of 20 Newtons and the other with a force of 10 Newtons, which would accelerate more? Why?
Answers
Answer:
The show with 20 N force will accelerate more than the show with 10 N force, because 20 N force is greater than 10 N force.
Explanation:
From Newton's second law of motion, acceleration is the ratio of applied to mass of the object.
[tex]acceleration = \frac{Force}{mass}[/tex]
Acceleration is directly proportional to an applied force. At a constant mass, acceleration increases with an increase in the applied force.
Therefore, the show with 20 N force will accelerate more than the show with 10 N force, because 20 N force is greater than 10 N force.
If the wavelength of a wave stays the same and the speed doubles, what happens to the frequency of the wave?
Answers
Explanation:
velocity = wavelength × frequency => v= f1 × λ => f1 = v/ λ
λ = stays the same
v = doubles
2v = f2 × λ
2v/λ = f2
now ,
f2/f1= 2vλ/ vλ = 2
f2 = 2f1
therefore frequency is doubled
A 22 g block of ice is cooled to −70 ◦C. It is added to 589 g of water in an 83 g copper calorimeter at a temperature of 21◦C. Find the final temperature. The specific heat of copper is 387 J/kg · ◦C and of ice is 2090 J/kg ·◦C . The latent heat of fusion of water is 3.33 × 105 J/kg and its specific heat is 4186 J/kg · ◦C . Answer in units of ◦C
Answers
I
Give reasons why christian should avoid corruption
Answers
Answer: that Christians should not withdraw from the world, but should actively participate in the ... That is perhaps the reason why there is currently such an ... Investigating the root causes and consequences of corruption may contribute to a more.
Explanation:
¿Qué pasa en nuestro cerebro cuando tomamos decisiones? Ejemplo: Estoy tocando una plancha caliente, y saco la mano rápidamente, ¿que paso en mi cerebro?
Answers
Answer:
Debido a la información de las neuronas sensoriales al cerebro.
Explicación:
Cuando toco una plancha caliente, extiendo la mano rápidamente porque las neuronas sensoriales presentes en la piel de nuestro cuerpo envían señales al sistema nervioso central, es decir, al cerebro. El cerebro toma decisiones de acuerdo con los estímulos y envía instrucciones a través de las neuronas motoras a los músculos para retirar las manos del hierro caliente a fin de evitar efectos nocivos en la piel debido al calor. El lóbulo frontal es una parte del cerebro que controla la personalidad, la toma de decisiones y el razonamiento.
A motor with an operating resistance of 24Ω is connected in a circuit witn 0.4A of current. The battery voltage must be volts
Answers
Answer:
Voltage = 9.6 Volts
Explanation:
Given the following data;
Resistance = 24Ω
Current = 0.4A
To find the voltage of the battery;
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = current * resistance [/tex]
Substituting into the formula, we have;
Voltage = 0.4 * 24
Voltage = 9.6 Volts
Therefore, the battery voltage must be 9.6 volts
If the speed of an object changes, the object must be experiencing an acceleration.
True or False
Answers
Use the drop-down menus to complete the sentences.
A thin wire has
resistance than a thick wire.
A short wire has
resistance than a long wire.
A warm wire has
resistance than a cool wire.
Answers
Answer:
A thin wire has more resistance than a thick wire
A short wire has less resistance than a long wire
A warm wire has more resistance than a cool wire
Answer: More, less, more
Explanation:
Edge 2021
describe how you would determine the half-life of a substance from an activity/time graph, plsplspls help
Answers
Answer: At any time, the number of decays per reasonable
time unit is proportional to the amount of the isotope present. (This is expressed by the first-order rate equation for a one-decay process.) Therefore, it does not matter whether one looks at the amount or the number of decays. It may be easier to measure the number of decays by e.g. a Geiger counter and prefer it for that reason.
It now matters what you understand to be the rate: the number of decays per second or the percentage of nuclei decaying at any given time. The first becomes less over time, the second one is a constant for each isotope.
You must have a reasonable number of decays within your time unit. If the half-life is long, it makes little sense to look at millisecond slices.
The people who write computer programs
Answers
Answer:
Someone who writes software or programs for computers is called a programmer.
Explanation: