a) The change in the momentum is -24,000 Kgm/s
b) The stopping force is - 20000 N
What is the momentum?We have to note that the momentum has to do with the product of the mass and the velocity of the car. We have to know that the change in the momentum of the car can be obtained by the use of the formula;
Change in momentum = mv - mu
m = mass of the car
v = final velocity of the car
u = initial velocity of the car
Then we have;
1000 ( 0 - 24)
= -24,000 Kgm/s
Then we have that the force that has been applied as the stopping force for the car is given by;
Ft = mv - mu
F = mv - mu/t
F = -24,000 Kgm/s/1.2
F = -20000 N
Thus, it is clear that the reason why the stopping force has a negative sign is because the direction of the force can be seen to be opposite to the direction of the motion of the car from the question given.
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Your friend just challenged you to a race through an obstacle course. You know in order to beat him, you must run 30 meters within 60 seconds in a southern direction. What does your average velocity need to be to win the race?
.5 meters per second, south
15 meters per second, south
2 meters per second, south
90 meters per second, south
Answer:
Velocity = 0.5 m/s South (A)
Explanation:
You need to determine the average rate of velocity.
The equation you will use is velocity = displacement/time
The displacement is 30m South.
The time is 60 seconds.
Plug into the equation Velocity = 30m South/60 s
Velocity = 0.5 m/s South
Answer: A)
Explanation:
Calculate magnitude and direction of the vector c while a=3 and b=5
Answer:
8
Explanation:
thc jhjhhdb hhvb. ggjv. j h. vhvhhhdh.
How much work is done using a 500-watt microwave oven for 5 minutes?
The amount of work that is done using a 500-watt microwave oven for 5 minutes is 150,000 J.
How to calculate work done?Work is a measure of energy expended in moving an object. It is generally said that "no work is done if the object does not move".
Power is a measure of the amount of work that can be done in a given amount of time. It can be represented by the following equation:
Power (J/s) = Work done (J) / time (s)
This means that work done = power × time
According to this question, a 500-watt microwave oven is used for 5 minutes. The amount of work done can be calculated as follows:
Work done = 500W × 300s
Work done = 150,000 J
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which of the following is a negative consequence associated with photovoltaic solar cells?responsesphotovoltaic solar cells increase the reliance on transport of fuels long distances from energy sources to homeowners.photovoltaic solar cells increase the reliance on transport of fuels long distances from energy sources to homeowners.smog and ground-level ozone can be created from pollutants released from photovoltaic solar cells during electricity generation.smog and ground-level ozone can be created from pollutants released from photovoltaic solar cells during electricity generation.the manufacture of photovoltaic solar cells involves toxic metals that can be released into the environment.the manufacture of photovoltaic solar cells involves toxic metals that can be released into the environment.the installation of photovoltaic solar cells on houses and other buildings can result in the release of chemicals that destroy stratospheric ozone.
A negative consequence associated with photovoltaic solar cells is option C .the manufacture of photovoltaic solar cells involves toxic metals that can be released into the environment.
Photovoltaic solar cells explained.Photovoltaic solar cells are also called solar panels and they are devices that convert sunlight and electricity.
They are made up of semiconductors materials especially silicon which absorbs photons from sunlight and convert it to electric current via photovoltaic effect.
When sunlight strikes the solar panels, the photons transfer their energy to electrons in the semiconductor material. This process creates an electric current that can be captured and utilized as electricity.
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As light from a star spreads out and weakens, do gaps form between the photons?
Which of the following has potential but not kinetic energy? (2 points)
a roller coaster zooming down a hill
b child riding their bike
c bird flying from a tree
d ball sitting on a shelf
Answer:
D
Explanation:
If the ball was in motion there would be kinetic energy but as there is no movement there is no kinetic energy only potential
any two difference between negative and positive charge of class 7 please fast
Answer:
any two difference between negative and positive charge
➢The matter is positively charged if it contains more protons than electrons, and it is negatively charged if it contains more electrons than protons.
Explanation:
I hope it will help you.....
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A 1,000 kg car experiences a net force of 3,500N from its engine.
Answer:Magnitude of the car's acceleration is 3.5 m/s²
Given:
Mass of car = 1,000 kg
Net force applied by car = 3,500 N
Find:
Magnitude of the car's acceleration
Computation:
Net force = Mass × Acceleration
So,
3,500 = 1,000 × Acceleration
Acceleration = 3,500 / 1,000
Acceleration = 3.5 m/s²
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Determine the direction of the magnetic field of the current-carrying wire in the vicinity of the loop.
We can determine the direction of the magnetic field of the current-carrying wire in the vicinity of the loop using the right-hand rule.
What is the right-hand rule?The right-hand rule is a common mnemonic in physics for remembering the direction of magnetic forces. A similar form of the right-hand rule, which is also called the right-hand grip rule, is used to find the direction of the magnetic field in a current-carrying wire.
The direction of the magnetic field made by a current in a wire curls around the wire in a ring. You can find the direction by curling your fingers and pointing your right thumb in the direction of the current in the wire. Your fingers will be curled in the same direction as the direction of the magnetic field around the current-carrying wire.
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what is the primary function of a refrigerant distributor at the outlet of a thermostatic expansion valve? what is the primary function of a refrigerant distributor at the outlet of a thermostatic expansion valve? allow the evaporator to operate with a proper superheat feed the evaporator sufficient liquid to control the leaving air temperature decrease the pressure drop across the evaporator coil evenly feed each evaporator circuit
The distributor's job is to distribute refrigerant equally throughout the circuiting of the evaporator. As the expansion valve's larger nozzle opens, the distributor maintains a constant flow rate.
What is the thermostatic expansion valve's main purpose?An essential piece of machinery in the HVAC sector is the Thermal Expansion Valve (TXV). The valve's function is to regulate the flow of refrigerant into the evaporator section. In this manner, it regulates the discrepancy between superheat and the refrigerant temperature that is currently present at the evaporator outlet.
What is the operation of a thermal expansion relief valve?The thermal expansion relief valve works similarly to an expansion tank by taking up the extra pressure that thermal expansion causes in the plumbing system.
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Scientists are told to doubt everything and not believe anything that is not provable. Is this a strength or weakness of science?
Please answer asappp :))
goat gallops at -1.5m/s, how far will the goat travel in 20 seconds?
Please show work
Answer:
30m
Explanation:
Given parameters:
Speed of the goat = 1.5m/s
Time = 20s
Unknown:
Distance traveled = ?
Solution:
To solve this problem, we use;
Speed = \(\frac{distance}{time}\)
Distance = Speed x time
So;
Distance = 1.5m/s x 20s = 30m
Electromagnetic waves are transverse waves. They consist of traveling electric and magnetic fields which oscillate periodically. What angle does the electric field make with the magnetic field in an electromagnetic wave?
A.) 30
B.) 45
C.) 60
D.) 90
Answer:
The answer is D.) 90
Explanation:
the electromagnetic wave is a transverse wave. the electric field makes an angle of 90° with the magnetic field. both these fields, in turn, make an angle of 90° with the direction of movement of the wave.
a completely filled closed aquarium is kept on a weighing machine. it can be assumed that the density of the fish is greater than the density of the water. the total mass of the aquarium and its contents put together is m. if now all the fish start accelerating upwards with a acceleration a, then the correct option is
If the fish in the aquarium are accelerating upwards with an acceleration a, then the buoyant force acting on the fish will decrease. The buoyant force is given by:
B = ρVg
where ρ is the density of water, V is the volume of the fish, and g is the acceleration due to gravity.
If the fish are accelerating upwards with an acceleration a, then the buoyant force will be reduced by an amount equal to the product of the mass of the fish and the acceleration:
B' = ρVg - ma
where m is the mass of the fish.
The weight of the fish is given by:
W = mg
where g is the acceleration due to gravity.
The net force acting on the fish is given by:
F_net = W - B'
Substituting the expressions for W and B', we get:
F_net = mg - (ρVg - ma)
Simplifying, we get:
F_net = (m - ρV)a
Since the fish are accelerating upwards, the weighing machine will register a lower weight for the aquarium and its contents. The weight measured by the weighing machine is given by:
W_measured = (m - ρV)g
If the acceleration of the fish is a, then the net force acting on the aquarium and its contents is given by:
F_net = (m - ρV + ρV_fish) a
where V_fish is the total volume of the fish in the aquarium.
The weight measured by the weighing machine will be reduced by an amount equal to the product of the mass of the fish and the acceleration:
W_measured' = W_measured - m_fish a
where m_fish is the total mass of the fish in the aquarium.
Therefore, the correct option is:
The weight measured by the weighing machine will decrease by an amount equal to the product of the mass of the fish and the acceleration of the fish.
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A roller coaster car starts out at rest at the top of the first hill and reaches a speed of 10 m/s at the bottom of the hill. What is its speed when it is half-way down? Assume that the track is frictionless. Group of answer choices 5.0 m/s 7.1 m/s 6.3 m/s 20 m/s none of them
Its speed when it is half-way down is 7.1 m/s.
To determine the speed of the roller coaster car when it is halfway down the hill, we can use the principle of conservation of mechanical energy. At the top of the hill, the car possesses only potential energy, which is converted into kinetic energy as it descends.
Since the roller coaster car starts at rest at the top, all of its initial potential energy is converted into kinetic energy at the bottom of the hill. Therefore, we can equate the potential energy at the top to the kinetic energy at the bottom:
mgh = (1/2)mv²
Where m is the mass of the car, g is the acceleration due to gravity, h is the height of the hill, and v is the velocity at the bottom.
Since the velocity at the bottom is given as 10 m/s, we can solve for the height h using the above equation. Once we have the height, we can find the speed when the car is halfway down by finding the potential energy at that point and equating it to the kinetic energy:
(1/2)mv² = mgh/2
Since the mass and gravitational acceleration are constant, the height cancels out, and we are left with:
(1/2)v² = gh/2
Simplifying, we find:
v = √(gh/2)
Since we are halfway down the hill, the height h is halved. Thus, the speed when the car is halfway down is:
v = √(g(h/2)/2) = √(5gh/8)
Therefore, the speed when the car is halfway down the hill is given by the square root of 5/8 times the speed at the bottom.
In this case, since the speed at the bottom is 10 m/s, the speed halfway down the hill is:
v = √(5/8 * 10²) = √(500/8) ≈ 7.1 m/s
Therefore, the correct answer is 7.1 m/s.
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Warm 12 grams of water from 98 degrees Celsius to 99 degrees Celsius
Answer:
E=mc△T
E=0.012(4200)(99-98)
E=50.4J
50.4 joules of heat is used
an Elementary particle with an initial velocity of 1.50 x 10 power 5 metre per second and third a region where is electrically accelerated with its velocity which is 5.70 * 10 raise to power 6 metre per second calculate its constant acceleration after travelling for 1.0 cm
According to the given problem the calculated value of acceleration is 1.62x10^5 m/sec^2. Acceleration can be defined as the rate at which velocity changes with time, in terms of both speed and direction.
Calculation of the given problemSince the given problem involves constant acceleration, the motion of the elementary particle can be readily analyzed using the following equations:
V = V0 + at (2-11)...................................(1)
X−X0 = V0 t + 1/2 at^2(2 - 15)................(2)
V^2 = V0^2 a(X-X0) (2-16)......................(3)
The value of acceleration can be can be calculated by solving Eq. (2 - 16). With V0= 1.50 X 10 5m/s, V = 5.70 X10 6m/s, X0 = 0 and X = 0.010 m,
Then the value of acceleration can be calculated by using the following formula.
= V^2 - V0^2/ 2X
= (5.7*10^6 m/sec)^2 / 2(0.010m)
= 1.62x10^5 m/sec^2
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the heating coil in a hair dryer is made of nichrome wire with a radius of 0.275 mm. if the coil draws a current of 8.85 a when there is a 120 v potential difference across its ends, find the following. (take the resistivity of nichrome to be 1.50 ✕ 10−6 ω · m.)
The resistance of the coil R IS 12.435Ω and The length of the wire that is calculated from R= ρL/A is L = 1.97 m.
Electrical resistance is a force that opposes the flow of current and is hence resistance to electricity. In this sense, it acts as a gauge for the difficulty of current flow. Ohms () are used to measure resistance.
Electricity will flow from high to low when there is an electron difference between two terminals. In opposition to that flow is resistance. The current decreases with increasing resistance. Conversely, the higher the current, the lower the resistance. In theory, resistance is affected by the kind, temperature, and length of the material through which the electricity is flowing. Metals generally have low electrical resistance, which varies depending on the type of metal, which makes electricity flow through them more easily.
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Consider a compact car that is being driven
at 98 km/h.
The acceleration of gravity is 9.8 m/s2.
From what height would the car have to be
dropped to have the same kinetic energy?
Answer in units of m.
Answer:
Height h = 37.8 m
Explanation:
Given :
Velocity of car (v) = 98 km / h
Acceleration of gravity = 9.8 m/s²
Computation:
Acceleration of gravity = 9.8 m/s²
Acceleration of gravity = (98)(1,000 m / 3,600 s)
Acceleration of gravity = 27.22 m/s
By using law of conservation of energy ;
(1/2)mv² = mgh
h = v² / 2g
h = 27.22² / 2(9.8)
Height h = 37.8 m
The height from which the car would have to be dropped to have the same kinetic energy is 37.81 meters.
Given the following data:
Velocity = 98 km/h.Acceleration of gravity = 9.8 \(m/s^2\)To find the height from which the car would have to be dropped to have the same kinetic energy:
First of all, we would convert the value of velocity in km/h to m/s.
Conversion:
\(98 = \frac{98}{3600} \times 1000 = 27.22 \;m/s\)
Applying the law of conservation of energy:
\(P.E = K.E\\\\mgh = \frac{1}{2} mv^2\\\\gh = \frac{1}{2}v^2\\\\h= \frac{v^2}{2g}\)
Substituting the given parameters into the formula, we have;
\(h = \frac{27.22^2}{2\times 9.8} \\\\h=\frac{741.05}{19.6}\)
Height, h = 37.81 meters
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what is the role of neutrons in the nucleus.
Answer:
To be neutral
Explanation:
Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
Because they are neutral, so they help hold the nucleus together.
You have studied and researched different forms of renewable and nonrenewable resources. what recommendations would you make to the committee regarding the types of resources that could be used to generate electricity? This paragraph should be a persuasive writing piece as you consider all you have learned based upon evidence. (8 pts.)
Based on my research and analysis of different renewable and nonrenewable resources, I strongly recommend that the committee prioritize the use of renewable resources for electricity generation. Renewable resources such as solar, wind, hydro, and geothermal power have numerous advantages over nonrenewable resources such as coal, oil, and gas.
First and foremost, renewable resources are more sustainable and environmentally friendly than nonrenewable resources. They do not emit harmful pollutants, greenhouse gases, or other harmful substances that contribute to climate change and environmental degradation. In addition, renewable resources are abundant and can be harnessed from various sources, making them a more reliable and long-term solution for electricity generation.
Furthermore, renewable resources have become more affordable and cost-competitive with nonrenewable resources over time. The cost of solar and wind power has decreased significantly, making them more accessible to households, businesses, and industries. On the other hand, the price of nonrenewable resources is highly volatile and subject to global market fluctuations, making them a less stable and unpredictable source of electricity.
In conclusion, I strongly recommend that the committee prioritize the use of renewable resources such as solar, wind, hydro, and geothermal power for electricity generation. Not only are these resources more sustainable and environmentally friendly, but they are also becoming more affordable and accessible to the general population. By embracing renewable energy, we can create a cleaner, more sustainable, and more prosperous future for ourselves and future generation
what si the accleration of a 24kg mass being pulled by a 5n force?
Answer:
Explanation:
Data:
mass = m = 24kg
force = F = 5 N
accelaration = a = ?
Formula:
F = ma
Putting:
5 = 24a\(\frac{5}{24}\) = aa = 0.2083 \(ms^{-2}\)What causes magnetic stripes to form?
Answer:
The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity.
Explanation:
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Multiple choice worth 2 points) if you are given force and time, you can determine power if you can know
Answer:
the time with the force combined divided by time times the force
a car can go from 0 - 45m/s in 3.4 seconds A. how much is its acceleration in m/s B. how much longer would it take the car to get up to 70m/s
Answer:
13.2m/s²
1.89s
Explanation:
Given parameters:
Initial velocity = 0m/s
Final velocity 1 = 45m/s
Final velocity 2 = 70m/s
Unknown:
Time taken = 3.4s
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration = \(\frac{Final velocity 1 - initial velocity }{3.4}\)
Acceleration = \(\frac{45 - 0}{3.4}\) = 13.2m/s²
B. How much longer would it take the car to get up to 70m/s
Maintaining the is acceleration;
13.2 = \(\frac{70 - 45}{t}\)
25 = 13.2t
t = 1.89s
The newton is defined as the:
A. Force of gravity acting on a one kilogram object at Earth's surface.
B. Speed of an object when under the influence of Earth's gravitational field
C. Force that can give a 1-kilogram mass an acceleration of 1m/sec squared.
D. Mass of an object that is accelerated at rate 1m/sec squared.
Answer:
b.
Explanation:
because of fhe speed an object when under the influence of earth gravitational field
tama po yan .
Hello friend,
The answer to your query is Speed of an object when under the influence of Earth's gravitational field
Line-wise answer:-The newton is defined as then speed of an object when under the influence of Earth's gravitational field.
✍️ by Benjemin ☺️
17) Name two ways you could decrease the potential energy of a bucket full of water sitting on a bench.
Explanation:
The potential energy of an object has the following formula
Potential energy = mgh
where m = mass of the object
g = acceleration due to gravity
h = height of the object
This means that the potential energy of an object depends upon its mass, acceleration due to gravity, and height.
In the given situation we have a bucket full of water. If the mass and acceleration due to gravity are not changed, the only way the potential energy can be decreased is by reducing the height of the bucket full of water.
This can be done by: -
(i) Lifting the bucket full of water in such a way that you
decrease its height as compared to the bench.
(ii) Put the bucket full of water on a stool whose height is
lower than the bench.
Answer:
1.By decreasing it's contents- this decreases the weight of the bucket thus decreasing the potential energy of the bucket.
2.By decreasing the height of the bench we have decreased the amount of potential energy stored in the bucket
the table lists the heights and weights of six wide receivers who played for the atlanta falcons during the 2010 football season. a. make a scatter plot for the data. be sure to label your axes.
Unfortunately, as an AI text-based model, I am unable to directly create visual content like scatter plots. However, I can guide you on how to create a scatter plot based on the given data.
To make a scatter plot for the heights and weights of the wide receivers, follow these steps:
1. Prepare your data: Organize the heights and weights of the six wide receivers in a table, with one column for heights and another for weights.
2. Choose a scale: Determine the appropriate scale for each axis based on the range of values in the data. Ensure that the plot will adequately represent the variations in both height and weight.
3. Assign axes: Label the vertical axis (y-axis) for the heights and the horizontal axis (x-axis) for the weights. Include the units of measurement (e.g., inches for height and pounds for weight).
4. Plot the data points: For each wide receiver, locate the corresponding height and weight values on the axes and mark a point. Repeat this for all six wide receivers.
5. Add labels and title: Label each data point with the respective player's identifier (name, jersey number, or any other identifier you prefer). Additionally, provide a title for the scatter plot, such as "Height and Weight of Atlanta Falcons Wide Receivers (2010 Season)."
Remember to maintain clear and readable labels, and use appropriate symbols or markers for the data points.
By following these steps, you can create a scatter plot representing the heights and weights of the Atlanta Falcons wide receivers during the 2010 football season.
Learn more about creating scatter plots and data visualization techniques using graphing software or tools available online for your specific needs.
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What is the energy conversion in an incandescent lightbulb?
Answer:
An incandescent bulb use electrical energy
Explanation:
which household items can combust
Answer:
Explanation:
Rubbing Alcohol
Nail polish and nail polish remover
Linseed oil
Aerosol cans
Non-dairy creamer
Gasoline, turpentine, and paint thinner
Hand sanitizer
Flour
Oranges