The increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.
What is gravitational potential energy?The energy that an item has due to its location in a gravitational field is known as gravitational potential energy.
The potential energy increases by 3773 J
PE₂-PE₁=mg(h₂-h₁)
3773 J = 35.0 × 9.81 × (h₂-h₁)
(h₂-h₁) = 10.98
Case 2 ;
ΔPE =?
ΔPE=mg(h₂-h₁)
ΔPE=56.0 × 9.81 ×10.98
ΔPE=6031.97 J.
Hence, the increase in potential energy of his mother if her mass is 56.0 kg will be 6031.97 J.
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Perform the following mathematical operation and report the answer to the correct number of significant figures 143.6/21.2
Answer:
143.6/21.2
=6.773584906
=6.8
Two people start at the same place and walk around a circular lake in opposite directions. one has an angular speed of 1.11 x 10-3 rad/s, while the other has an angular speed of 8.40 x 10-3 rad/s. how long will it be before they meet
The time taken before the two people will meet is 11 minutes.
Time taken before they meetThe time taken before the two people will meet is calculated from the principle of relative velocity.
(ω₁ + ω₂)t = θ
where:
ω₁ is angular speed of the first personω₂ is the angular speed of the second persont is time of motionθ is angular displacement(1.11 x 10⁻³ + 8.4 x 10⁻³)t = 2π
(9.51 x 10⁻³)t = 2π
t = 2π/9.51 x 10⁻³
t = 660.7 secs
t = 11 mins
Thus, the time taken before the two people will meet is 11 minutes.
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two resistors 6 ohm and 3 ohm are connected in parallel and its connected with a cell of EMF 6 volt find the current through each resistors
Answer:
See below
Explanation:
Each resistor has 6 v applied across it
rememeber
V = IR then V/R = I
for the 6 Ω 6 v /6Ω = 1 amp
for the 3 Ω 6v /3Ω = 2 amp
the north end of a compass points towards
Opposite attract , this is the magnetic south pole
option (b) ✔
Answer:
B
Explanation:
Opposites attract......so the end of the needle pointing to the North Pole is the South pole of the magnetic needle.
Help please help! Need help
Answer:
M. Magnetism is a property of individual atoms.
Explanation:
when a magnet is broken into pieces the new pieces behave like the original magnet this observation shows that magnetism is the property of individual atoms.
where do automatically generated statements that set the properties of the labels, buttons, and forms end up?
The generated statements that set the properties of the labels, buttons, and forms end up automatically within the InitializeComponent() method.
What is InitializeComponent?The InitializeComponent method in programming is the that have code that works with codes that creates and initializes the creates and initializes the user interface objects .
Conclusively, when a statement is generated, to when set the properties of the labels , it will definitely been felt in the InitializeComponent() method automatically.
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Can a average velocity be zero.Why?
Answer:
Yes
Explanation:
Average velocity is the ratio of total displacement and time taken for that displacement:
[tex]average \space\ velocity = \frac{displacement}{time}[/tex]
This means if displacement is zero, then average velocity will also be zero.
Displacement is zero when an object moves some distance in one direction, and then moves the same distance but in the opposite direction.
∴ As it is possible for displacement to be zero, it is also possible for average velocity to be zero.
True or false? ultrasonic cleaners are based on the same principle as echolocation in bats and some other animals.
The given statement is true ultrasonic cleaners are based on the same principle as echolocation in bats and some other animals.
What is echolocation?A physiological method for identifying far-off or unseen items (like prey) using sound waves that the objects reflect back to the source, such as a bat.
High-frequency sound waves are used in ultrasonic cleaning to scour clean objects that are submerged using liquid as a medium.
The cavitation of the solution's molecules is brought on by the high-frequency sound waves, which are generally 40 kHz in frequency.
Although bats have developed an advanced kind of echolocation that allows them to travel and find food in the dark, they have vision that is comparable to that of humans.
Bats use high frequency sound pulses emitted through their mouth or nose and listen for the echoes to achieve echolocation.
It is accurate to say that ultrasonic cleaners work on the same principles as creatures like bats and certain others that use echolocation.
Hence the given statement is true.
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What is the magnitude of the electric field between the two electrodes in ionization type detectors?
The magnitude of the electric field between the two electrodes in ionization type detectors is an electric field can be given in volts per meter.
How to calculate the magnitude of the electric field?The magnitude of the electric field varies with distance, d, from the charge based on the charge of the respective particle. Therefore, the electric field for a single point charge can be easily calculated from these measured values.
In the International System of Units, the electric field strength is measured in volts per meter (V/m).
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Which equation can be used to calculate the normal force on an object if you know the speed of the object, the coefficient of kinetic friction, and the force of kinetic friction on the object?
Answer:
D
Explanation:
The friction force is the weight force times the coefficient of friction. So diving by the coefficient gives you the weight force which is equivalent to the normal force.
The equation that we can used to determine the frictional force using the coefficient of kinetic friction and the normal force is given by the expression : F = u N.
Where N is the normal force by the weight of the body.
What is frictional force?Frictional force is a type of force acting on a body to prevents its motion. Hence, the frictional force is always negative. Frictional force acting on an object is making a resistance to the motion of the object.
There are both kinetic frictional force and static frictional force. The coefficient of frictional force is the ratio of the frictional force to the normal force on the object. The normal force on the object is equal to m g that is the force by its own weight.
If u is the coefficient of kinetic friction and N be the normal force acting on the object, then the force of kinetic frictional force F is given by,
F = u N.
Where N = mg.
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A 1.5 x 10^4 kg railroad car moving at 7m/s to the north collides with and sticks to another car of 2 x 10^4 kg that is moving in the opposite direction. What is the velocity of the 2x10^4 kg car just before the collision if their final velocity is found to be 3 m/s.
The velocity of the 2x10^4 kg car just before the collision is 0 m/s.
What is conservation of momentum principle?When two bodies of different masses move together each other and have head on collision, they travel to same or different direction after collision.
The external force is not acting here, so the initial momentum is equal to the final momentum. For inelastic collision, final velocity is the common velocity for both the bodies.
m₁u₁ +m₂u₂ =(m₁ +m₂) v
Substitute the values for m₁ = 1.5 x 10^4 kg, m₂ =2 x 10^4 kg and u₁ =7 m/s, the final velocity is 3m/s/
1.5 x 10^4 x 7+2 x 10^4 x u₂ = (1.5 x 10^4 + 2 x 10^4) x 3
u₂ = 0 m/s
So, the car with mass 2x10^4 kg is stationary.
Thus, the velocity of the 2x10^4 kg car just before the collision is 0 m/s.
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A 1-kg block starts sliding up a 30o inclined plane with an initial velocity of 4.00 m/s. How far will the block travel before coming to rest, if the surface is rough and the coefficient of kinetic friction between the block and the ramp is 0.2.
The block will travel 2.038 m before stopping. Newton's third equation of motion is applied in the given problem.
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and acceleration. Mathematically in the different components and balancing the equation gets.Components in the x-direction.
From Newton's third equation of motion;
v²=u²+2as
0 =u²+2(-a)s
u²=2as
u²=2×(2×μg)s
4.00 m/sec = √2×(2 ×0.2 ×9.81 s
16 = 7.848 s
s = 2.038 m
Hence, the block will travel 2.038 m before stopping.
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A ball is shot from the ground straight up into the air with initial velocity of 40 ft/sec. Assuming that the air resistance can be ignored, how high does it go
The height to which the ball attained, given the data is 7.58 m
Data obtained from the questionInitial velocity (u) = 40 ft/s = 40 × 0.3048 = 12.192 m/sFinal velocity (v) = 0 m/s (at maximum height) Acceleration due to gravity (g) = 9.8 m/s²Maximum height (h) =? How to determine the maximum heightv² = u² – 2gh (since the ball is going against gravity)
0² = 12.192² – (2 × 9.8 × h)
0 = 12.192² – 19.6h
Collect like terms
0 – 12.192² = –19.6h
–12.192² = –19.6h
Divide both side by –19.6
h = –12.192² / –19.6
h = 7.58 m
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What kind of eclipse occurred at the beginning of the week, bringing a colorful sight to stargazers in the americas, africa, europe, and parts of asia?.
Answer:
none
Explanation:
what is the volume in liters of 1.00 oz, given that 1 l=1.0567 qt and 1 qt=32 oz (exactly)?
Given that, 1 Liter equals 1.0567 quartz and 1 quartz equals 32 oz, the volume 1.00 oz equals 0.02957 L.
What is the volume in liters of 1.00 oz?Given that;
1 L = 1.0567 qt1 qt = 32 oz1.00 oz = x litersFirst, we convert 1.00 oz to qt
32 oz = 1 qt
1.00 oz = x
x = 1.00 / 32
x = 0.03125 qt
Now, we convert 0.03125 qt to liter
1.0567 qt = 1 L
0.03125 qt = x
x = 0.03125 / 1.0567
x = 0.02957 L
Given that, 1 Liter equals 1.0567 quartz and 1 quartz equals 32 oz, the volume 1.00 oz equals 0.02957 L.
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A proton moves in the negative x-direction through a uniform magnetic field in the negative y-direction what is the direction of the magnetic force acting on the proton?
out of the page
into the page
in the positive y-direction
in the negative y-direction
A proton travels through a constant magnetic field in the negative y-direction while moving in the negative x-direction. The proton will be subject to a magnetic pull that is directed into the page. Option B is correct.
What is the right-hand thumb rule?Hold a current-carrying conductor in your right hand with your thumb pointing in the direction of the current then wrap your fingers around the conductor and orient them in the direction of the magnetic field lines.
A proton travels through a constant magnetic field in the negative y-direction while moving in the negative x-direction.
The proton will be subject to a magnetic pull that is directed into the page.
Hence, option B is correct.
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a student taps the side of a stainless steel can containing water, making some sound waves travel from the stainless steel to the water. Sound waves travel at 1500 m/s in water and at 550 m/s in stainless steel. Explain how the changes in velocity, frequency and wavelength are related
Velocity is directly proportional to wavelength and frequency.
How the changes in velocity, frequency and wavelength are related?
There is direct relationship present between velocity and frequency as well s wavelength. If velocity increases, wavelength and frequency are also increase and vice versa. The higher the speed of a sound, the greater its wavelength for a given frequency.
So we can conclude that Velocity is directly proportional to wavelength and frequency.
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A copper block rests 30.0 cm from the center of a steel turntable. The coefficient of static friction between the block and the surface is 0.53. The turntable starts from rest and rotates with a constant angular acceleration of 0.50 rad/s2. After what time interval will the block start to slip on the turntable?
pls explain the question briefly
Answer:
refer to the above attachment
what type of modulation does the omni-directional antenna transmit?
AM and FM are the two types of modulation that an omnidirectional antenna transmit.
What is an omnidirectional antenna?An omnidirectional antenna is also referred to as an isotropic antenna and it can be defined as a type of antenna that is designed and developed to radiate equal radio power or intercept radio-frequency (RF), especially in all directions perpendicular to an axis.
In Science, there are two types of modulation that an omnidirectional antenna transmit and this include the following:
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A jar contains 100 marbles. There are 20 white marbles, 20 green marbles, 20
blue marbles, 20 red marbles, and 20 yellow marbles. Which of the following
represents the highest entropy for the jar of marbles?
A. The marbles are arranged in horizontal layers by color.
B. The marbles are arranged in a repeating pattern.
O C. The marbles are arranged in a random order.
O D. The marbles are arranged in vertical columns by color.
The highest entropy for the jar of marbles is represented by the marbles are arranged in a random order.
What is entropy?
Entropy is the measure of the degree of disorderliness of a system or degree of randomness of a system.
Entropy of a system increases with increase in randomness of the system or disorderliness of the system.
Thus, the highest entropy for the jar of marbles is represented by the marbles are arranged in a random order.
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Equation for solving wavelength
Answer:
The equation for wavelength is λ = v/f
Explanation:
λ is wavelength
v = velocity
f = frequency
Gyroscopic wander can be divided in to two categories, one is DRIFT, what is the other?
Gyroscopic wander can be divided into two categories and these are:
DriftToppleWhat is gyroscopic wander?Gyroscopic wander can be defined as a movement of the spin axis (axis of rotation) away from a specific fixed direction.
Based on scientific information and records, there are two main types of gyroscopic wander and these include the following:
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All stars go through a lifecycle.
The star Mira will go through a supernova stage in its lifecycle but the Sun will not.
How is the star Mira different to the Sun?
Mira is much bigger than the Sun.
Only very massive stars will go through a supernova stage, causing the outer layer to explode away and the core to collapse in on itself, becoming very dense.
What must be known to determine the direction of the magnetic force on a change? Check all that apply.
What we must know to determine the direction of the magnetic force on a charge are;
The type of the charge.The direction of the magnetic field.The velocity of the charge.How to find the direction of magnetic force?The magnetic force is the force of attraction or repulsion that emerges between electrically charged particles since of their movement.
From right hand rule, to determine the direction of the magnetic force on a charge, we must know;
The type of the charge.The direction of the magnetic field.The velocity of the charge.Read more about Magnetic Force Direction at; https://brainly.com/question/18484862
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light hits ocean during
Answer:
no way to tell since the ocean surface is moving too violently it's not possible to determine the reflected angle
7. Many medicines started out as natural products.Penicillin was originally made from _______________
A. Poppies
B. Bark of the willow tree
C. The flower foxglove.
D. Mold
Answer:
D
Explanation:
PCN was discovered in mold
sound travels through a
Answer:
A.3.64 m
Explanation:
Because
v=(fλ)(1382)=(380)λλ=3.637m~3.64mwhere ,v=velocity
f=frequency
λ=wave length
Answer:
3.64
Explanation:
the formula is Already provided which is Velocity(m/s)= frequency (HZ) × wavelength
making wavelength stand alone
wavelength= velocity/ frequency
wavelength= 1382/380
wavelength= 3.64
a car with a mass of 2,00 kg travels a distance of 400 m as it moves from one stoplight to the next . as its fastest , the car travels at 18 m/s. what is its kinetic energy at this point?
Answer:
32400 J
Explanation:
K.E.=(1/2)(200)(18^2)
A point charge of 5.0 x 10^-7 C moves to the right at 2.6 x 10^5 m/s in a magnetic field that is directed into the screen and has a field strength of 1.8 x 10^-2 T.
What is the magnitude of the magnetic force acting on the charge?
The magnitude of the magnetic force acting on the charge is 2.34×10⁻³ N.
What is magnetic force?
A magnetic force is the force that act in a magnetic field.
To calculate the magnetic force, we use the formula below.
Formula:
F = qvB.........Equation 1Where:
F = magnetic forceq = point chargev = Velocity of the the chargeB = Field strengthFrom the question,
Given:
q = 5.0×10⁻⁷ Cv = 2.6×10⁵ m/sB = 1.8×10⁻² TSubstitute these values into equation 2
F = (5.0×10⁻⁷)(2.6×10⁵)(1.8×10⁻²)F = 23.4×10⁻⁴F = 2.34×10⁻³ NHence, the magnitude of the magnetic force acting on the charge is 2.34×10⁻³ N.
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Magnitude is used to show the brightness of one object compared with the brightness of another object with the _____ magnitude of a star referring to a star's brightness as seen from your eyes and _____ magnitude being the actual brightness of a star.
The apparent magnitude of a star refers to its brightness as seen from your eyes and absolute magnitude being the actual brightness of a star.
What is magnitude?Magnitude can be defined as a unitless measure which is used to show the brightness of an object in comparison with the brightness of another object.
Basically, there are two types of magnitude and these include the following:
Apparent magnitudeAbsolute magnitudeIn conclusion, the apparent magnitude of a star refers to its brightness as seen from your eyes and absolute magnitude being the actual brightness of a star.
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I'm pretty sure it's apparent; absolute
