Answer:
Biconcave lens or Diverging lens.
Virtual Image
0.75cm on the same side as the object.
Explanation:
Biconcave lens. Biconcave lenses form all images at the same side as the object. Although a biconvex lens can exhibit the same phenomena, it only occurs when the object is in between the focal point and the optical center (object distance<focal length). From the given parameters, the object distance is 3cm and the which is obviously greater than the focal length.
So, we conclude that the lens used is a biconcave lens.
A concave lens (biconcave, plano-convex,) alway produces a virtual image.
Let u, v and f represent the object distance, image distance and focal length of the lens respectively.
In this case,
u = 3cm
v = ?
f = -1cm ( f is negative for diverging lenses)
1/f = (1/u) + (1/v)
-1 = (1/3) + (1/v)
v = -3/4cm = -0.75 cm
The negative sign means that it's a virtual image.
Which statement is true about gravitational forces?
Answer:
C: Every mass exerts a gravitational force on every other mass
This statement is true
Giving Brainliest to The First Correct Answer
A car, with a mass of 1225 kg, traveling at 75 m/s slows to a stop in 5.3min. What is the size and direction of the force that topped the car? What provided the force?
Answer:
[tex]F_{k} = 9854N[/tex] Opposite to the motion of the car.
Explanation:
Please find the detailed solution below
Is the equation balanced? Why or why not? 2 Zn + 2 HCl ----------> 2 H2 + 2 ZnCl2 SPS3.bGroup of answer choicesYes because the law of conservation of matter is being followed. The mass of the reactants is equal to the mass of the products.No because the law of conservation of energy is not followed. There are different amounts of energy in the reactants and products.Yes because the law of conservation of energy is followed. There are equal amounts of energy in the reactants and products.No because the law of conservation of mass is not being followed. The hydrogen and chlorine atoms have different numbers of atoms in the reactants and products.
The equation is not balance because the law of conservation of mass is not being followed.
Why the equation is not balanced?The hydrogen and chlorine atoms have different numbers of atoms in the reactants and products which is not balance on both sides i.e. reactant and products.
So we can conclude that the equation is not balance because the law of conservation of mass is not being followed.
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When you travel in an elevator (which moves linearly in space), the ___________ detect when the elevator is accelerating or decelerating.
We can confirm that when you travel in an elevator, the utricle and saccule detect when the elevator is moving.
What are the utricle and saccule?These are small organs located in the inner ear. They serve a very important function in our everyday life. These otolith organs are responsible for the detection of movement and provide us with a sense of spatial orientation. They accomplish this by stimulating very small, hair-like cells with a specialized fluid.
Therefore, we can confirm that when you travel in an elevator, the utricle and saccule detect when the elevator is accelerating or decelerating.
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4. If everything lines up perfectly for superposition to occur, these massive waves would break with a force of 100
metric tons per m². She compares this to how much force standing on a car?
If everything lies perfectly for superposition to occur, the force on a car is 1000 N.
What is superposition?Superposition is the phenomenon of placing one wave over the other so that they coincide. The resultant force will be zero.
The force in kg will be
1mteric ton = 1000 kg
1metric ton per m²= 1000 N
1000 N force is applied to a car, which will be equal and opposite to the massive wave.
The equal force will act on a car equal to 1000 N.
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13. A type of cuckoo clock keeps time by having a mass bouncing on a spring, usually something cute like a cherub in a chair. What force constant is needed to produce a period of 0.500 s for a 0.0150-kg mass?
The answer is 2.37N/m but please show your work.
The force constant that is needed to produce a period of 0.500 s for a 0.0150-kg mass is 2.37 N/m
Data obtained from the questionPeriod (T) = 0.5 s
Mass (m) = 0.015 Kg
Pi (π) = 3.14
Spring constant (K) =?
How to determine the spring constantThe spring constant can be obtained by using the formula for calculating the period of simple harmonic motion. This is illustrated below
T = 2π√(m /K)
Square both side
T² = 4π²m / K
Cross multiply
T² × K = 4π²m
Divide both side by T²
K = 4π²m / T
K = (4 × 3.14² × 0.015) / 0.5²
K = 2.37 N/m
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Which of the following is an example if an unbalanced force
A. a computer on a table
B. a man leaning against a wall
C. a girl severing a volleyball
D. fruit in a ball
Answer:
C
Explanation:
I would have to say C because the girl is constantly moving in the act of serving the volleyball.
What happens to the force between charges when: (a) the distance between them is halved?
Answer:
i dont know but ill update you
A ball of mass 0.5 kg starts rolling on the ground with a speed of 5 m/s. When the ball starts moving, the momentum of the ball is:
Answer:
2.5 kg - m/s
Explanation:
Momentum = m * v = .5 * 5 = 2.5 kg-m/s
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.602 and the coefficient of kinetic friction is 0.327 . How much force is needed to begin moving the book
Answer:
11.98 N
Explanation:
Normal force = mg = 2.03 * 9.81
coeff of static friction must be overcome for the book to begin moving
.602 = F / (2.03 * 9.81) = 11.98 N
A 89.1 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large peice of chocolate cake rated at 815 (food) calories. How high must the person climb? The acceleration due to gravity is 9.8m/s^2 and 1 food calorie is 10^3 calories. Answer in units of km
Answer:
3904 Meters
Explanation:
F = ma
work = F * d
89.1 (9.8)* d = 815000/.23906 conversion factor 1 j = .23906 cal
d = 3904 meters
One positve and one negative charhe jave a force of -5. 00 N between them. If the force changed to -170 N , by what factor did the distance between them change
Answer:
The distance is shortenend by factor .1715
Explanation:
5 n = 1/r^2
sqrt (1/5) = r
170 n = 1 / ( x sqrt(1/5))^2
(xsqrt 1/5)^2 = 1/170
x sqrt 1/5 = .076696
x = .1715
is an ocean wave electromagnetic or mechanical
Answer:
mechanical
Explanation:
the energy is carried by water <3 hope this helped
When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called ________.
When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.
What is Star?Stars are present in the galaxy that have the ability to generate their own light. They are both quite hot and very huge.
They are largely formed of hydrogen, with a trace of helium thrown in for good measure.
The sun is also a star, and its energy and light play an important part in the survival of all kinds of life on Earth.
When a star is so dense that its atoms have their electrons smashed in toward the nucleus (resulting in densities about a million times greater than water), the resulting material is called a Neutron star.
Hence the correct answer is a neutron star.
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Marley stayed up late to watch the planet Mars rise in the east. She had read online that Mars was unusually close to the Earth in its orbit and would look nearly as large as the moon. However, she only saw stars, and the next morning she ended up oversleeping because of her late bedtime. Marley was the victim of
Marley was the victim of a hoax. The synonym of the hoax is a practical joke, joke, jest, prank, trick, jape, and fraud.
What is the meaning of a hoax?To dupe someone into believing or accepting something untrue and frequently absurd as genuine.
A practical joke, joke, jest, prank, trick, jape, and scam are all synonyms for a hoax.
Marley stayed up late to watch the planet Mars rise in the east. She had read online that Mars was unusually close to the Earth in its orbit and would look nearly as large as the moon.
However, she only saw stars, and the next morning she ended up oversleeping because of her late bedtime. Marley was the victim of a hoax.
Hence a hoax is a correct answer.
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A car of mass of 1200 kg is driven around a corner of a radius of 45m at 15 ms-1
.
(a) Calculate the acceleration of the car.
(b) Calculate the centripetal force acting on the car.
(c) Explain how the centripetal force is being produced.
Explanation:
w = v/r
= 15/ 45 = 1/3 rads-¹
a = w²r
= 1/9 • 45 = 5 ms-²
F = mv²/r
= 1200• 15• 15/45
= 6000N
The car, when rounding the curve, is pulled towards the center by the friction between it's wheels and the road.
Pls answer asap!! I need help on this question!
Hubble space telescope, Hubble deep field guide, moon, mercury, Saturn, sun, galaxy messier 101
Answer:
1-Hubble Deep Field Galaxy
2-Galaxy Messier 101
3-Sun
4-Saturn
5-Mercury
6-Moon
7-Hubble Space Telescope
An athlete gains 300J of KE when running at 3m/s. Find the mass of the athlete.
A massless rod is balanced on a pivot as shown below. If the rod is in static equilibrium, what
magnitude of force (x) must be exerted on the other end of the rod?
A. 7.5 N
B. 13 N
C. 20 N
D. 53 N
E. 80 N
Answer:
torques must balance for equilibrium
counterclockwise = clockwise
1.5 X = 4 * 20
x = 80 N-m / 1.5 m = 53 N
(D) is correct
A cylinder has a base radius of 4m and a height of 6m. What is its volume in cubic m, to the nearest tenths place?
Answer:
मार्क ASL brainlisessjd
What is the best description of a wave? a pulse that carries energy a disturbance that moves matter a medium disturbed by a vibration matter that is moved from one place to another
Wave is best described as a pulse that carries energy and is denoted as option A in this context.
What is a Wave?This is a disturbance which carries energy from one place to another without the movement of the matter.
Since matter isn't moved then it is best described as a pulse which carries energy from one place to another.
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Answer:A
Explanation:
Why is data sent digitally from space probes instead of using an analog device?
1. A particular solid material is heated but its temperature does not rise.
11
a) What is happening to the solid?
b) Where does the energy go that is being supplied to it?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here's the answer ~
1. The energy that has been given to the solid material is being used to change its phase from solid to liquid.
2. This all energy is converted into latent heat of fusion causing change in state. so there's no increase in temperature.
Answer →
a) The phase of solid material is changing due to Absorption of heat.
b) The energy that is being supplied to it is absorbed by the material to break the intermolecular bonds.
Explanation:
Heat is a mod of transfer of energy, and solid is a giant network of atom or ions closely bounded with high inter molecular forces. When the bonds are formed lead to release in energy hence to break the bond you need to supply energy and that energy supplier is heat. Generally there are two types of heat, one that you sense as rising temperature and another where you see a gradually change in the phase of material. When the heat that you supply is being absorbed that means the energy is being consumed(absorbed) by the material, to break the bonds, and you doesn't sense the temperature of material being raised but the change in state of material from solid→Liquid, solid→gas depends on the type compound, the phase of material changes, same thing happens in reverse case from Gas→Liquid, Liquid→Solid, the energy is released in atmosphere. this absorbed or released energy(heat) is Latent heat.
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How much w work is done by a babysitter who uses 4500 w of power to lift a baby in 4s
Serious answers please
What is the electric force between two charges? Charge one has a charge of 7 C and charge two has a charge of 5 C. The charges are 5,925 m apart. Round your answer to the fourth decimal place.
Answer:
See below
Explanation:
Coulomb's Law Force = k q1 q2 / r^2
k = Coulomb's constant = 8.9875517 x 10^9 kg m^3 /s^2 C^2
Force = 8.9875517 x 10^9 * 7 * 5 / (5925^2) = 8960.5102 N
A 73.9 kg weight-watcher wishes to climb a
mountain to work off the equivalent of a large
piece of chocolate cake rated at 991 (food)
Calories.
How high must the person climb? The
acceleration due to gravity is 9.8 m/s2 and 1
food Calorie is 103 calories.
Answer in units of km.
The height to which the weight-watcher must climb to work off the equivalent 991 (food) Calories is 0.59 Km
How to determine the energy.1 food calorie = 103 calories
Therefore,
991 food calories = 991 × 103
991 food calories = 102073 calories
Multiply by 4.2 to express in joule (J)
991 food calories = 102073 × 4.2
991 food calories = 428706.6 J
How to determine the height Energy (E) = 428706.6 JMass (m) = 73.9 kgAcceleration due to gravity (g) = 9.8 m/s²Height (h) =?E = mgh
Divide both side by mg
h = E / mg
h = 428706.6 / (73.9 × 9.8)
h = 591.95 m
Divide by 1000 to express in km
h = 591.95 / 1000
h = 0.59 Km
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If a cannonball is fired horizontally it will not go in a straight line why?
Explanation:
A projectile (Cannon ball) is launched at an angle to the horizontal and rises up to a peak while moving horizontally. When it reaches the peak, the projectile starts to fall.
A variable resistor has a voltage of 12.0 V placed across it. If the resistance is increased 20%, what happens to the current flowing through it
Answer:
Explanation:
Remark
The answer is in the formula
E = I * R
E = the voltageI = the CurrentR = the ResistanceSolution
Let the resistance = R
I = 12/R
If we increase the resistance by 20% then we get
R1 = R + (20/100) * R
R1 = R + 1/5 * R
R1 = 6 R/5
What happens to I when you do this
I = 12/(6/5 R) Effectively you need to treat 6/5 as a reciprocal
I = 12 * 5/6 * R
I = 10 / R
What does this tell you? Since the Resistance has a base value of R, when increased by 20%, the numerator of the fraction is reduced to 10 from 12. In other words the current is now smaller when R goes up.
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A bird sitting on a high power line:
(a) gets killed instantly
(b) gets a mild shock
(c) gets a fatal shock
(d) is not affected practically
Answer:
(d) is not affected practically
Explanation:
A bird sitting on a high power line is not affected practically.
This is because both of its legs are at the same potential, and current cannot flow through its body.
Answer:
option D
Explanation:
The bird sitting on a high power line but the bird is not touching ground by its body parts .
Hence there is no way electricity can pass through its body to earth
Thus it won't get any shock .
Evaluate cos(30°).
ОА. 1.00
ов. 0.87
ОС. 0.50
ОС
D. 0.58
Answer:
The answer for cos(30°) is 0.87