Answers
Answer:
22.5 hp
Explanation:
The power delivered to an object is given by :
\(P=F\times v\)
Where
F is force and v is velocity of the car.
For the same force, power is directly proportional to the velocity.
So,
\(\dfrac{P_1}{P_2}=\dfrac{v_1}{v_2}\\\\P_2=\dfrac{P_1v_2}{v_1}\\\\P_2=\dfrac{15\times 30}{20}\\\\P_2=22.5\ hp\)
So, the new power is 22.5 hp.
Related Questions
what is the kinetic energy of a sky diver with a mass of 60.0 kg falling at a terminal velocity of 40.0 ms?
Answers
Answer:
48,000 J
Explanation:
m = 60.0 kg
v = 40.0 m/s
kinetic energy = mv^2/2 = 60*40^2/2 = 48,000 J
The amount of inertia of an object depends on its __________________________________.
The greater the ________________________________, the greater its _______________________________.
The greater the _____________________________ of the object, the greater the ___________________________
required to accelerate or slow down the object.
The greater the ____________________________ applied, the greater the acceleration.
Answers
Answer:
first one :
the object will stay at the same speed and direction unless it is acted upon by an internal unbalanced force.
Since water is much denser than air, deep-sea divers experience a much higher ambient pressure underwater. Each 10 meters of depth underwater adds another 1 atm to the ambient pressure experienced by the diver. (Note: this is in addition to the 1 atm ambient pressure at the surface of the water!) What pressure, in psi, is experienced by a diver 50.0 meters below the surface of the water
Answers
Answer:
If you are at sea level, each square inch of your surface is subjected to a force of 14.6 pounds. The pressure increases about one atmosphere for every 10 meters of water depth. At a depth of 5,000 meters the pressure will be approximately 500 atmospheres or 500 times greater than the pressure at sea level.
Explanation:
At sea level, a force of 14.6 pounds is applied to every square inch of your surface. For every 10 meters of sea depth, the pressure rises by approximately one atmosphere. The pressure will be about 500 atmospheres, or 500 times more than the pressure at sea level, at a depth of 5,000 meters.
What is pressure?Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.
Pressure is the physical amount of force exerted on a particular area.
Pressure can be expressed as
Pressure = Force / area
There are three types of pressure.
Absolute pressureGauge pressureDifferential pressureThus, at sea level, a force of 14.6 pounds is applied to every square inch of your surface. For every 10 meters of sea depth, the pressure rises by approximately one atmosphere. The pressure will be about 500 atmospheres, or 500 times more than the pressure at sea level, at a depth of 5,000 meters.
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explain the term tenscopo
Answers
Answer: Here you go, i hope this kinda helps.
Explanation:Disambiguation is just a fancy way of saying "asking clarifying questions".
Watson Assistant replies to user's questions based on a confidence score.
Sometimes the customer's question could be interpreted in two or three different ways.
For example, if you say you'd like to "book a table for 8", the assistant is able to ask a clarifying question:
Did you mean booking a table for 8PM, 8AM, or booking a table for 8 guests?
Watson Assistant will ask the question when its confidence score is divided between a few options to ensure that your customers get exactly the right service they need.
A uniform magnetic field vector B is directed out of the page. A loop of wire of area 0.8 m2 is in the plane of the page. At a certain instant, the field has a magnitude of 5.0 T and is decreasing at the rate of 0.5 T/s. The magnitude of the induced emf in the wire loop at this instant is most nearly:_______
Answers
Answer: 0.4 V
Explanation:
Given
The area of the loop is \(A=0.8\ m^2\)
The magnetic field is changing at the rate of \(\dot{B}=-0.5\ T/s\)
Induced EMF is given by
\(E=-\dfrac{d\phi }{dt}\\\\E=-\dfrac{d(B\cdot A)}{dt}\\\\E=-A\dfrac{dB}{dt}\\E=-0.8\times (-0.5)\\E=0.4\ V\)
The magnitude of induced emf is 0.4 V
which statement summarized the difference between mass and weight?
Answers
Answer:
The second statement.
5) You are visiting Norway for the winter and driving on a highway where the speed
limit is 80 km/hr. Your car indicates that you are going at a speed of 55 mi/hr. Will
you be arrested? (1 mi = 1.6 km)
Answers
A ball is thrown straight upward and returns
to the thrower’s hand after 2.39 s in the air.
A second ball is thrown at an angle of 35.0
◦
with the horizontal.
At what speed must the second ball be
thrown so that it reaches the same height as
the one thrown vertically? The acceleration
of gravity is 9.81 m/s
2
.
Answer in units of m/s.
Answers
The speed the second ball must be thrown so that it reaches the same height as the one thrown vertically is 40.84 m/s.
What is the maximum height reached by the first ball?
The maximum height travelled by the first ball is calculated by applying the following kinematic equation as shown below;
h = vt + ¹/₂gt²
where;
v is the initial vertical velocity of the first ball = 0t is the time of motion of the first ballh = 0 + ¹/₂gt²
h = ¹/₂gt²
h = ¹/₂(9.8)(2.39²)
h = 28 m
The speed the second ball must be thrown so that it reaches the same height as the one thrown vertically is calculated as follows;
h = (u²sin²θ)/2g
u²sin²θ = 2gh
u² = (2gh) / (sin²θ)
u² = (2 x 9.8 x 28) / (sin 35)²
u² = 1,668.1
u = √1,668.1
u = 40.84 m/s
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When energy is conserved or transferred, some energy becomes unavailable to do useful work. What happened to the unavailable energy?
Answers
Some energy in a body is unavailable to do useful work. According to second law of thermodynamic, unavailable energy is quantified as the . the increase in entropy.
What is second law of thermodynamics?According to second law of thermodynamics, the heat is flowing from a hot body to colder body. This heat transfer from hot to cold, for instance, is related to nature's tendency for disorganized systems and a lack of energy available for labor.
It has been demonstrated that a system's entropy is a measurement of its disorder and the lack of energy for work.Entropy is a measurement of the amount of energy that cannot be used for labor.
Even if all kinds of energy are interconvertible and all of them can be utilized to do work, it is not always feasible to employ all of the available energy for labor, even in theory.
The study of thermodynamics is interested in this unusable energy because efforts to turn heat into work gave rise to the discipline.
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energy transferred from one thing to another when the gulf balls collide?
Answers
This is based on the principle of conservation of energy and momentum.
When the collision of golf balls takes place the energy gets transferred from one ball to the other.
The golf balls experience a force that causes them to change their form and also direction. During the collision, the mechanical energy is converted into heat, sound, and other forms of energy. The rest of energy is used to move in a new direction.
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Stars and Galaxies began to form 500 million years after the Big Bang.
True
O False
Answers
how does mass relates to latent heat?
Answers
The mass of a substance is not directly related to latent heat. Instead, latent heat is a parameter that describes the amount of energy required or released during a phase shift of a substance.
What is latent heat?Latent heat can be thought of as hidden energy that is supplied or extracted to change the state of a substance without changing its temperature or pressure.
Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process—typically a first-order phase transition.
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At a temperature of 300 K, the pressure of the gas in a deodorant can is 3 atm.
Calculate the pressure of the gas when it is heated to 900 K.
Answers
The pressure of the gas in the deodorant can when it is heated to 900 K is 9 atm.
What is the pressure of the gas when it is heated to 900 Kelvin?Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.
It is expressed as;
P₁/T₁ = P₂/T₂
From the data:
Initial pressure P₁ = 3 atmInitial temperature T₁ = 300 KFinal pressure P₂ = ?Initial temperature T₂ = 900 KWe substitute our values into the expression above and solve for final pressure.
P₁/T₁ = P₂/T₂
P₁T₂ = P₂T₁
P₂ = P₁T₂ / T₁
P₂ = ( 3 atm × 900 K ) / 300 K
P₂ = 9.0 atm
Therefore, the final pressure is 9.0 atm.
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A person has a weight of 500N on earth, based on this ..- If the person moves from the ground level to a position high up on a mountain, how will this affect the gravitational force between him and the earth?- What is accelerating towards the other, The Earth or the Person?
Answers
We will have the following:
*If a person has a weigth of 500N on Earth, and moves from the ground level to a position high up on a mountain this will affect the gravitational force between the person and the Earth in a very minuscule way. The net change is given only in the gravitational potential energy stored in the person due to the position higher up- And the force between the person and the Earth will be slighly smaller, since the distance is a little bit greater between the center of the Earth and the person.
*We have that they are both acceleration towards each other, the person is falling towards the Earth and the Earth is falling towards the person, but the acceleration of the person towards the Earth is orders of magnitude greater than the Earth falling to the person.
identify the correct statement from the following. classical physics is valid for matter speeds larger than the speed of light classical physics is valid for object size smaller than microscopic objects classical physics is valid under weak gravitational fields all of these options none of these options
Answers
Classical Physics is normally concerned with matter and energy on the normal scale of observation, while modern physics is caring with the behavior of matter and energy under extreme conditions or on a very large or very small scale.
For example, atomic and nuclear physics studies matter on the tiny scale at which chemical elements can be identified. The physics of elementary particles is on an even smaller scale since it is concerned with the most basic units of matter.
Classical Physics is also known as high-energy physics because of the extremely high energies required to produce many types of particles in particle accelerators.
On this scale, regular, commonsense notions of space, time, matter, and energy are no longer valid.
Computational modeling is essential for quantum and relativistic physics.
Classic physics is considered the limit of quantum mechanics for a large number of particles.
On the other side, classic mechanics is derived from relativistic mechanics. Like, in most of the formulations from special relativity, a correction factor (v/c)**2 appears, where v is the velocity of the object and c is the speed of light.
For velocities much minute than that of light, one can neglect the terms with c2 and higher that appear.
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When the balloon sticks to the wall (assuming it sticks to the wall). It is
because the balloon is negatively charged and the wall carries an extra
positive charge.
1.false
2.true
Answers
Most people can throw a baseball farther than a bowling ball, and most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball. Explain these two situations in terms of
Newton’s First Law of Motion
Newton’s Second Law of Motion
Answers
Based on Newton's first and second law of motion most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball because the mass of the baseball is smaller and will require smaller force to be stopped.
What is Newton's first law of motion?
Newton's first law of motion first law of motion states that a body at rest or uniform motion in a straight line will continue in that path unless acted upon by an external force.
Newton's first law of motion is also called law of inertia because it depends on mass of the object.
An object with a greater mass will require greater force to be stopped or get moving.
Based on Newton's first law of motion most people would find it less painful to catch a flying baseball than a bowling ball flying at the same speed as the baseball because the mass of the baseball is smaller and will require smaller force to be stopped.
Also according to Newton's second law of motion, the force applied to an object is proportional to the product of mass and acceleration of the object. Thus, a baseball with smaller mass will require smaller force to be stopped.
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The figure shows a motorcyclist traveling east along a straight
road. After passing point B, the cyclist continues to travel at an average
velocity of 18 m/s east and arrives at point C 2.8 s later. What is the
position of point C?
v=
t=
x1=
xf=
Answers
The position of point C from point A is determined as 96.4 m east.
What is the distance travelled by cyclist from B to C?
The distance travelled by cyclist from point B to point C is calculated by applying the following kinematic equation as shown below;
d = vt
where;
v is the speed of the cyclist after passing point Bt is the time of motion of the cyclist from point B to point CSubstitute the given parameters and solve for the distance travelled by the cyclist from point B to point C.
d = 18 m/s x 2.8 s
d = 50.4 m
The position of point C is calculated by adding the distance travelled by the cyclist from point B to point C;
position of point C = 50.4 m + 46 m = 96.4 m
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A 2 m long wire carrying 2 A of current pointing to the right is placed in a magnetic field of 4 T directed away from you. Which direction does the force on the wire point?
A. Down
B. Up
C. Left
D. Right
Answers
Explanation:
To determine the direction of the force on the wire, we can use the right-hand rule for the cross product of two vectors. The force on the wire is given by:F = I * L x Bwhere I is the current, L is the length of the wire, and B is the magnetic field.
If we point our right-hand thumb in the direction of the current (to the right), and our fingers in the direction of the magnetic field (away from us), then our palm will point in the direction of the force.
So, using the right-hand rule, we can see that the force on the wire will be directed downward. Therefore, the correct answer is A. Down.a State the SI units (name and symbol) of the following quantities:
length
volume
Answers
Volume - metre cube (m^3)
Answer:
Meter "m" and meter qube "m3" respectively
Explanation:
Length SI unit is “” meter represented by “m” Volume is product of three lengths. So its SI unit is meter qube represented by m3 (m raise to the power 3).Can someone please help, ty!!
(Will mark brainliest)
Answers
a bus traveling with a speed of 54 km/h has a kinetic energy of 2x10^6 j. what is the mass of the bus
a. 1.78 x 10^5 kg
b. 2.88 x 10^7 kg
c. 1.78 x 10^4 kg
d. 2.88 x 10^5 kg
Answers
The mass of the bus is 1.78 × 10⁵ kg. Hence, option (a) is correct.
What is kinetic energy?Kinetic energy is a type of energy that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force.
Mathematically,
Kinetic energy = 1/2 × mass × speed²
2 × 10⁶ Joule = 1/2 × mass × (54 km/h)²
2 × 10⁶ Joule = 1/2 × mass × (54 × 5/18 m/s)²
Mass = 2 × 2 × 10⁶ ÷ (54 × 5/18 m/s)² kg
= 17777.78 kg.
= 1.78 × 10⁵ kg
Hence, mass of the bus is 1.78 × 10⁵ kg.
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Name:.
Date:
Homework: Writing an Argument About
Australia's Skin Cancer Rate
G
4
You now have enough evidence to explain why Australia's skin cancer rate is so high. Review your
argument from Chapter 2 and think about how you will convince the AHA that both Claim 2 and
Claim 3 are accurate. You will use your completed Reasoning Tool from Activity 3 to revise and add to
your argument.
Question: Why is the skin cancer rate in Australia so high?
Answers
Thunderclouds typically develop voltage differences of about 1×108V. Given that an electric field of 3×106V/m is required to produce an electrical spark within a volume of air, estimate the length of a thundercloud lightning bolt.
Answers
The Length of the thundercloud lightning bolt is 33.33 m.
What is length?This can be defined as the distance between two point.
To calculate the length of the thundercloud, we use the formula below.
Formula: E = V/L............ Equation 1Where:
E = Electric field of the thundercloudV = Potential difference L = Length of the thundercloud.Make L the subject of the equation
L = V/E............... Equation 2From the question,
Given:
V = 1×10⁸ VE = 3×10⁶ V/mSubstitute these values into equation 2
L = (1×10⁸)/(3×10⁶)L = 100/3L = 33.33 mHence, The Length of the thundercloud lightning bolt is 33.33 m.
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A pendulum of mass 12 kg is released from rest at some height, as shown by
point A in the image below. At the bottom of its arc at point B, it is traveling at
a speed of 19 m/s. What is the approximate amount of energy that has been
lost due to friction and air resistance? (Recall that: g = 9.8 m/s²)
20 m
A35
B186
C78
D112
Answers
The energy lost to friction and air resistance is 186 J.
option B.
What is the energy lost to friction and air resistance?The energy lost to friction and air resistance is calculated from the change in the mechanical energy of the pendulum.
The initial potential energy of the pendulum at the initial position is calculated as;
PEi = mghi
where;
m is the massg is gravityh is the initial heightP.Ei = 12 kg x 9.8 m/s² x 20 m
P.Ei = 2,352 J
The final kinetic energy of the pendulum is calculated as follows;
K.Ef = 0.5 x 12 kg x (19 m/s)²
K.Ef = 2,166 J
ΔE = 2,166 J - 2,352 J
ΔE = -186 J
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If anyone wants 100 points then come help. I will mark brainlliest. No links just answer
Answers
Heat energy required to increase the temperature of water in bathtub is 12,546,000 Joules.
What is thermal energy?The energy contained by an object by virtue of heating is known as thermal energy.
Given is the mass of water m = 150 kg, Temperature change ΔT = (40 -20)= 20 °C
The specific heat of water Cp =4182 J/kg.°C
Heat transfer Q =m x Cp x ΔT
Q = 150 x 4182 x 20
Q = 12,546,000 J
Thus, Heat energy required to increase the temperature of water in bathtub is 12,546,000 Joules.
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Hooke's law states that the force, F, in a spring extended by a length x is given by
F=-kx. According to Newton's second law F = ma, where m is the mass and a is
the acceleration. Calculate the dimension of the spring constant k.
Answers
Answer:
dimensions of k are kg / s^2
Explanation:
F=ma (Newton's second law)
F=-kx (Hooke's law)
so equate both
-kx = ma
k = -ma/x
= mass * acceleration / distance (dimensions, -1 has no dimension)
= kg * m/s^2 / m
= kg / s^2
1. The drawing shows a skateboarder moving at 5.4 m/s along a horizontal section of a track that is
slanted upward by 48° above the horizontal at its end, which is 0.40 m above the ground. When she
leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air
resistance, find the maximum height H to which she rises above the end of the track.
Answers
Projectile motion is the curved path motion of a body launched into the air near the Earth's surface and having a horizontal velocity.
The maximum height to which the skateboarder rises, H, is approximately 0.6 meters above the end of the track.Reason:
Given parameter are;
Initial velocity of the skateboarder, v₁ = 5.4 m/s
Inclination of the track, above the horizontal, θ = 48°
Height of the end of the elevated track, h ≈ 0.40 m
Path of the skateboarder when she leaves the track = Path of a projectile
Required:
Maximum height H to which she rises above the end of the track.
Solution;
From v² = u² - 2·g·h, at the end of the track where;
h = 0.40 m
u = Initial velocity = 5.4
g = 9.81 m/s²
We have;
v₂² ≈ 5.4² - 2 × 9.81 × 0.40 = 21.312
The velocity at which she leaves the track, v₂ ≈ √(21.312 m²/s²).At the maximum height, H, we have;
\(\displaystyle v__y\) = 0
Therefore, from \(\displaystyle v__y\)² = \(\displaystyle u__y\)² - 2·g·H, where;
\(\displaystyle u__y\)² = 2·g·H
\(H = \dfrac{u_y^2}{2 \cdot g}\)Which gives;
\(H = \dfrac{21.312}{2 \times 9.81} \times sin^2(48^{\circ}) \approx 0.6\)Therefore;
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What is the change in potential energy in moving a 10kg box from the floor to a table 1 m high?
Answers
Explanation:
potential energy formula is 1/2 mv2(this 2 is square).m means mass and v means velocity.
now, you can calculate
The change in potential energy in moving a 10kg box from the floor to a table 1 m high is 98 Joules.
To find the potential energy, the given values are,
Mass of the box = 10Kg
Height h = 1 m
What is Potential energy?The potential energy can be defined as the energy that is stored and that can be determined through various parts in a particular system.
Also, the energy will gets stored when the object is not moving.
For example: Spring. Even when the spring is not stretched or contracted it stores energy.
The formula for Potential energy PE= mgh joules.
m is the Mass,
g is the acceleration due to gravity = 9.8 m/s²,
h is the height.
Substituting all the given values,
Potential Energy= 10 (9.8)(1)
PE= 98 J
Thus the potential energy of the box= 98 J.
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PIUDICITIS CONSECulvely and Circle your aliswers. Lilyo
proper significant digits.
53. When you turn on your CD player, the turntable accelerates from zero to 41.8 rad/s in
3.0 s. What is the angular acceleration?
or
Answers
Answer:
The angular acceleration of CD player is \(13.93\ rad/s^2\).
Explanation:
Initial angular speed of a CD player is 0 and final angular speed is 41.8 rad/s. Time to change the angular speed is 3 s.
It is required to find the angular acceleration. The change in angular speed of the CD player divided by time taken is called its angular acceleration. It can be given by :
\(a=\dfrac{\omega_f-\omega_i}{t}\\\\a=\dfrac{41.8-0}{3}\\\\a=13.94\ rad/s^2\)
So, the angular acceleration of CD player is \(13.93\ rad/s^2\).