Answer:
The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s is 18 m/s
Explanation:
Given that the mass of the dog = 5.0 kg
The mass of the pig = 30 kg
The speed with which the pig is walking = 3.0 m/s
We have that linear momentum = Mass × Velocity
Therefore, the momentum of the pig, m₁ = 30 kg × 3.0 m/s = 90 kg·m/s
m₁ = 90 kg·m/s
The momentum of the dog m₂ = Mass of the dog × Velocity of the dog
Given that m₁ is to be equal to m₂, we have;
m₁ = 90 kg·m/s = m₂ = Mass of the dog × Velocity of the dog
90 kg·m/s = m₂ = 5.0 kg × Velocity of the dog
m₂ = 5.0 kg × Velocity of the dog = 90 kg·m/s
5.0 kg × Velocity of the dog = 90 kg·m/s
Velocity of the dog = 90 kg·m/s/(5.0 kg) = 18 m/s
The velocity with which the 5.0 kg dog has to run to have the same momentum as the 30 kg pig walking at 3.0 m/s = 18 m/s.
Which of Newton’s laws of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and the same direction unless acted upon by an unbalanced force?(1 point)
According to Newton's First Law of Motion, a body at rest will continue to be at rest unless another force acts on it, and a body moving at a constant speed will continue to move in a straight path unless another force acts on it.
what is the Newton’s laws of Inertia?A body must be subject to an external force in order to accelerate (or decelerate) or alter its direction of motion. Net forces or imbalanced forces are other names for external forces.
Inertia is the quality that a body possesses that prevents it from moving when at rest or from speeding up or slowing down while in motion. The mass, or quantity of substance in a body, directly relates to inertia. A body has more inertia the more mass it possesses.
what is Second Law of Motion ?According to the Second Law of Motion, if an imbalanced force applies on a body, the body will accelerate (or decelerate), changing its speed. It is possible to state that a body at rest is thought to have zero speed ( a constant speed). Therefore, an imbalanced force is any force that causes a body to move. Additionally, an imbalanced force is any force that causes a body to move slowly or quickly, such as gravity or friction. The formula below can be used to demonstrate this law.
F= ma
The imbalanced force is F.
The object's mass is m.
The force's acceleration, a, is measured.
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HELP!!!! WILL MARK BRAINLIEST!!
Fill in the names of the neuron parts and their functions. After you've filled in all the answers, click on
the puzzle pieces next to the answer spaces to check your success
Answer:
A) Dendrite
Receives information from other neutrons and transmits information into the soma/cell body.B) Soma
Contains the nucleus of the neutral cell and maintains chemicals that keep the neutron functioning properly, also provides energy for the cell.C) Axon
Transmits signals away from the soma to other neutrons, muscles, or glands.D) Myelin Sheath
Insulated fatty material that surrounds an axon and speeds up signal transmission.E) Synapse
The junction where neutrons connect to transmit electrical or chemical information.Explanation:
EDG 100%
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Explanation:
longitudinal wave .
they are composed of rarefaction and compression
there is change of pressure variations through medium
there is change in density throughout the medium
they can be propagated in liquid soild and gasses
example sound wave
transverse wave
they are composed of troughs and Crest
there is no pressure variations throughout the medium
there is no change in density
they can propagated in liquid soild but not gases
example light wave
You burn a 100 kg log. If you add the mass
of the log, soot and gasses given off
while the log was burning they will equal
A.120kg B. 50kg C.100 D. 80
Answer:c.100
Explanation:
an object has a mass of 14 grams and a density of 7 g/mL. When placed in water it sinks. What is the Volume of water displaced?
A 28g
B 14ml
C 98ml
D 2ml
Explanation:
D = M/V
We rearrange this equation to get V = M/D
So 14 g/7 g/mL,
the grams cancel out, and we're left with 2 mL.
D is the answer.
The volume of water displaced by the body is 2 ml.
What is volume of a body?Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is [tex]m^{3}[/tex].
Now, it is given that,
Mass of the object is 14 grams.
Density of the object is 7 g/ml.
So, volume of the object will be = (mass of the object)/(density of the object)
= 14 grams/(7 g/ml).
= 2 ml.
When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.
Hence, The volume of displaced water is 2 ml.
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Two brifks that weight 20 lbs fall off a building. Brick A falls from 30 feet
and Brick B falls from 10 feet. Which brick has more energy? *
Answer:
Brick A has more energy because its weight is more, that means that the gravitational pull to the earth will be more if the brick will fall from 30 feet.
In addition to displacement, which of the following must be used for a more complete description of the average velocity of an object?
acceleration
O change in time
O Distance
O speed
Answer:
Option: 3 Speed √
is the right answer
What is the mass of a student who weighs 618 Newton?
Answer:
63.01 kg is the mass of the student whose weight is 618 Newton
Mass of student is 63 kilogram (Approx.)
Given that;
Weight of a student = 618 Newton
Find:
Mass of student
Computation:
We know that;
Gravitational acceleration g = 9.8 m/s²
So,
Mass = Weight / Gravitational acceleration
Mass of student = 618 / 9.8
Mass of student = 63.06
Mass of student = 63 kg (Approx.)
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Without completing the calculations, determine what the new volume will be in the problem below. Also, explain how you were able to determine the new volume without completing the calculations. Pay special attention to how the pressure is changing. An 80.0-mL sample of carbon monoxide gas (CO) is stored at a pressure of x kPa. The pressure is doubled to 2x kPa. What is the new volume?
According to the Boyle's law, as pressure is inversely proportional to volume at constant temperature the the new volume of gas is 40 ml.
What is Boyle's law?Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.The nature of graph obtained when gas obeys Boyle's law is hyperbolic curve.
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It takes a force of 50 N to give a body an acceleration of 10 m/s2. What is the mass of the body?
Answer:
The answer is 5 kgExplanation:
The mass of the body can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
We have
[tex]m = \frac{50}{10} \\ [/tex]
We have the final answer as
5 kgHope this helps you
1. Compare pressure that fluid applies to the bottom of a glass with the pressure it applies to the sides of the glass
) What is work? Write down the types of work.
Work
In physics work is said to be done when a force acting on a body displaces it through a certain distance. The work by a constant force is measured by the dot product of force will displacement.
i.e. W = F.S or W = F S cosq …(1)
where F = force and S = displacement
And q = angle between F and S.
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water come out more slowly from an upstairs tap from a similar downstairs
Answer:
As we know that liquid pressure is depend upon the depth of liquid where the downstair tap has more depth so water come out with more pressure wheres the upstairs tap has less depth so water come out with low pressure so
2. Which of the following is NOT a possible source of Earth's magnetic field?
A. sun's magnetic field
c. magnetosphere
b. moon's magnetic field
d. Earth's core
Answer:
c.) magnetosphere
Explanation:
I think is C
how magnets were first developed from pieces of lodestone and the different ideas that people had about them.
Explanation:
the mineral magnetite.They are naturally occurring magnets, which can attract iron. The property of magnetism was first discovered in antiquity through lodestones.Pieces of lodestone, suspended so they could turn, were the first magnetic compasses,
and their importance to early navigation is indicated by the name lodestone, which in Middle English means "course stone" or "leading stone", from the now-obsolete meaning of lode as "journey, way".
2. A flower pot falls from a balcony ledge to the sidewalk below. If the flower pot
falls a distance of 30m, find a) the time it takes to hit the sidewalk b) the velocity
when it hits the sidewalk
Answer:
a) 2.5s
b)24.2m/s
Explanation:
a) s = ut +1/2gt^2
Where u=0
Make t the subject and solve
b) v^2=u^2+2gs
Where u =0
Make v the subject and solve
which graph above best illustrates homeostasis
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An object can travel a distance of 20 meters at the same time that it has a displacement of zero.
A. True
B. False
Answer:
Yes
Explanation:
Yes, displacement can be zero even if the distance is not zero. For example, when a body is thrown vertically upwards from a point A on the ground, after some time it comes back to the same point A.
Compute for the total mechanical energy of a 3.5 kg baseball dropped from a height of 3 meters moving at a speed of 10 m/s. NEED ASAP GRADE 8 SCIENCE TY IN ADVANCE :))
Mechanical energy = Kinetic Energy + Potential Energy
Kinetic Energy :Kinetic energy = 1/2 * m * v² = 1/2 * 3.5 * (10)²
=> Kinetic energy = 175 J
Potential Energy :Potential energy = m * g * h = 3.5 * 10 * 3 = 105 J
Hence,
Mechanical energy = Kinetic Energy + Potential Energy
= 175 J + 105 J
= 280 J
Taking into account the potencial, kinetic and mechanical energy, the total mechanical energy is 278.005 J.
Potencial energyPotential energy refers to the position that a mass occupies in space and its magnitude is directly proportional to the height at which the object is, with respect to a reference position, to the mass of the object and to gravity:
Ep = m×g×h
Kinetic energyOn the other hand, kinetic energy manifests itself when bodies move and is associated with speed. The kinetic energy of a body depends on its mass and the square of its speed:
Ec = [tex]\frac{1}{2}[/tex]×m×v²
Mechanical energyThe mechanical energy of a body is the capacity it has to carry out mechanical work, that is, to produce a movement due to causes of mechanical origin, such as its position or its speed.
The mechanical energy of a body is the sum of its kinetic energy and its potential energy:
Em = Ep + Ec
Where
Em is the mechanical energy (J).Ep the potential energy (J). Ec the kinetic energy (J).Then:
Em= m×g×h + [tex]\frac{1}{2}[/tex]×m×v²
Principle of conservation of mechanical energyThe Principle of conservation of mechanical energy indicates that, in the absence of friction and without the intervention of any external work, the sum of the kinetic and potential energies remains constant, that is, the mechanical energy of a body remains constant throughout the movement. if no friction force acts.
This caseIn this case, you know that:
m= 3.5 kgg= 9.81 [tex]\frac{m}{s^{2} }[/tex]h= 3 mv= 10 [tex]\frac{m}{s}[/tex]Complying with the Principle of Conservation of Mechanical Energy and replacing in the expression of mechanical energy:
Em= 3.5 kg×9.81 [tex]\frac{m}{s^{2} }[/tex]×3 m + [tex]\frac{1}{2}[/tex]×3.5 kg×(10 [tex]\frac{m}{s}[/tex])²
Solving:
Em=103.005 J + 175 J
Em= 278.005 J
Finally, the total mechanical energy is 278.005 J.
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How is momentum calculated?
O A. By dividing mass by velocity
B. By subtracting velocity from mass
C. By multiplying mass by velocity
D. By adding mass and velocity
Momentum can be calculated by multiplying the mass of an object by the velocity of an object. Thus, the correct option is C.
What is Momentum?The momentum is a quantity which can be defined as the product of the mass and velocity of an object. It is an example of standard mechanical quantity. Momentum is a vector quantity, this means it possess both a magnitude and a direction. If "m" is an object's mass and "v" is its velocity, then the object's momentum p is:
p = m × v
The examples of momentum is whenever we toss a ball at someone as well as it smacks them square in the face. It indicates how difficult it would have been to stop the ball.
Therefore, the correct option is C.
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What does an increase in the temperature of air indicate? A) The air has less thermal energy. B) The air has more thermal energy. C) The air particles have slowed down. D) The air particles have sped up.
Answer:
B)The air has more thermal energy
Answer:
its B
Explanation:
THATS THE ANSWER TRUST ME
Question 8 of 16
A school bus takes 30 minutes to reach the school from your house. If the average velocity of the bus is 6 m/s to the east, what is the bus's displacement?
(6.3 points)
A. 180 m
B. 180 m east
C. 1.08 x 10^4 m
D. 1.08 x 10^4 m east
Answer:
b
Explanation:
im pretty sure its b
In a scientific test conducted in Arizona, a special cannon called HARP (High Altitude Research Project) shot a projectile straight up to an alti-tude of 180.0 km. If the projectile's initial speed was 3.00 km/s, how long did it take the projectile to reach its maximum height?
Answer:
It took the projectile 120 s to reach the maximum height.
Explanation:
Given;
maximum height of the projectile, s = 180 km = 180,000 m
initial speed of the projectile, u = 3 km/s = 3000 m/s
final velocity at maximum height, v = 0
Apply the following kinematic equation for average velocity of the projectile;
[tex]s = (\frac{v+u}{2} )t\\\\(v+u)t = 2s\\\\t = \frac{2s}{v+u} \\\\t = \frac{2*180,000}{0+3,000}\\\\ t = 120 \ s[/tex]
Therefore, it took the projectile 120 s to reach the maximum height.
a car traveling at a speed of 46 m/s encounters an emergency and comes to a complete stop. how much time will it take for the car to stop if it accelerates at -1m/s/s
1. What is the new kinetic energy of the 1900kg ship on the right moving at 4 m/s?
2. If the 0.10kg baseball on the right has a kinetic energy of 5 J, what is its velocity?
3. if the mosquito on the right is moving at 10 m/s anx has the the kinetic energy of 0.25 J, what is its mass?
Explanation:
That`s is the answer, just check
Question 28
1 pts
A cube 5.0 cm on a side has a mass of 750 grams. Find the Density. Hint: Volume of a cube
=Length x Width x Height
A.6 g/cm3
B.20 g/cm3
C. 14 g/cm3
D. 8 g/cm3
Answer:
A) 6 [g/cm^3]
Explanation:
The volume of a cube is equal to the product of height by width by length, all these dimensions are equal.
V = L*L*L
where:
L = 5 [cm]
V = (5)^3
V = 125 [cm^3]
Density is defined as the relationship between mass and volume.
density = mass/volume
density = 750/125
density = 6 [g/cm^3]
if a dice is thrown at random find the probability of getting 4
Answer:
☆<《HOPE IT WILL HELP YOU 》>☆
Explanation:
The probability of getting 4 is 1
Answer:
1/6
Explanation:
There are 6 faces, and one of them is 4. Therefore the answer is 1/6.
What keeps the sun shining
Answer:
The Sun shines by turning hydrogen into helium in its core.
Explanation:
This process is called nuclear fusion. Fusion happens when lighter elements are forced together to become heavier elements. When this happens, a tremendous amount of energy is created.
Why do we use scatter plots for most data in Physical Science? Question 1 options: because the teacher said to use scatter plots because scatter plots show 100% of the data like a pie because scatter plots show the relationship between the independent and dependent variables because scatter plots show data for categories that do not overlap
Answer:
scatter plots show the relationship between the independent and dependent variables
Explanation:
A scatter plot is a graph which shows two variables plotted along two axes (usually the x and y axes). Scatter plots are useful in establishing any form of correlation between the dependent and independent variables in any study.
Correlation simply means the degree of relationship between variables, that is, how much does one variable affect the other? When scatter plots are almost a straight line graph, there is a high correlation between the variables. When the points in a scatter plot are isolated, there is little (sometimes zero) correlation between the variables.
Describe an experiment the student could do to measure the specific heat capacity of a metal
Answer:
Steps to determine the specific heat capacity.
1. Place a beaker on a balance and press zero.
2. Now add the oil to the beaker and record the mass of the oil.
3. Read the starting temperature of the oil.
4. Connect a joulemeter to the immersion heater.
5. Time for thirty minutes.
6. Read the number of joules of energy that passed into the immersion heater.
7. Read the final temperature of the oil.
8. Use the following formula to calculate the specific heat capacity.
Explanation:
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