Read each scenario and then answer the questions. Scenario A: A shopping cart is pushed a distance of 3 m by a force of 15 N. Scenario B: A shopping cart is pushed a distance of 4 m by a force of 12 N. Scenario C: A shopping cart is pushed a distance of 6 m by a force of 10 N. Which scenario requires the most work? Which scenario requires the least work?
Answers are C and A
Answer:
Read each scenario and then answer the questions.
Scenario A: A shopping cart is pushed a distance of 3 m by a force of 15 N.
Scenario B: A shopping cart is pushed a distance of 4 m by a force of 12 N.
Scenario C: A shopping cart is pushed a distance of 6 m by a force of 10 N
Which scenario requires the most work?
Answer: Scenario CWhich scenario requires the least work?
Answer: Scenario Aa car has a mass of 12,000 kg. What is it’s acceleration when the engine exerts a force of 600 N? (Formula: F=ma)
Which of these is true for the two poles of a magnet?
Question 1 options:
Like poles repel each other.
Unlike poles attract each other.
Like poles attract each other.Unlike poles attract each other.
Like poles attract each other.Unlike poles repel each other.
Like poles repel each other. Unlike poles repel each other.
Question 2 (1 point)
If you rubbed two balloons with a wool cloth and held them close together, what do you think would happen?
Question 2 options:
They would repel one another because they would have positive charges.
They would repel one another because they would both have a negative charge.
They would attract one another because they would both have a negative charge.
They would attract one another because they would have opposite charges.
Question 3 (1 point)
An object has
Question 1:
Answer:
Like poles repel each other. Unlike poles attract each other.
Explanation:
In a magnet their are two poles which are north pole and south pole. Like pole repel each other and unlike pole attracts each other because magnetic lines of force originate from north pole and terminate on the south pole.
Question 2:
Answer:
They would repel one another because they would both have a negative charge.
Explanation:
When balloon is rubbed with wool cloth electrons are transferred from wool to balloon. Thus, balloon acquire negative charge and wool becomes positively charged. Since, we are rubbing both balloons the charges on the surface are same. Hence they would repel one another because they would both have a negative charge.
Question 3:
This question is incompletely posted.
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1. What is the period of a wave with a wave speed of 12 m/s and a frequency of 60 Hz?
A. 5.0 s
B. 720 s
C. 0.20 s
D. 0.02 s
Answer: 0.02s
Explanation:
Windmills generate electricity by transferring energy from wind to a turbine
If a television with mass 15kg is lifted to a shelf of height 1.2m how much gravitationallyl potential energy is added to the television
Which of the following are disadvantages of solar energy?
The disadvantages of solar energy primarily include its dependency on weather, need for large space, requirement of rare-earth minerals for photovoltaic cells, and potentially high costs.
Explanation:The main disadvantages of solar energy are largely tied to its dependence on weather conditions and the requirement of considerable space. Solar energy generation is chiefly affected by cloud cover, nightfall, and incident angle strike at high altitudes that influence the amount of light energy available. While solar energy conversion does not necessarily require connection to large-scale power grids, making it beneficial for remote locations, it does rely on the creation of photovoltaic cells which require rare-earth minerals that can be difficult to obtain. Additionally, the price of solar energy, despite falling dramatically, may still present as a financial barrier for some.
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What linear speed must an earth satellite have to be in a circular orbit at an altitude of 159 km?
One light-hour is the distance light travels in one hour. the speed of light is about 300,000 km/s (3 × 10^5km/s). if jupiter is 0.72 light hours from the sun, how far is this?
Answer:
Jupiter is [tex]7.776*10^8km[/tex] away from the sun.
Explanation:
The speed of light is [tex]3*10^5km/s[/tex]. This means, since there are 3600 seconds in an hour, the distance light travels in 1 hour is:
[tex]3*10^5*3600= 1.08*10^9km[/tex]
and this distance is called the light-hour.
Since Jupiter is 0.72 light-hours away from the Sun, its distance in km from the sun is:
[tex]1.08*10^8*0.72=7.7776*10^8km[/tex]
Thus, Jupiter is [tex]7.776*10^8km[/tex] away from the sun.
An amplifier has a 50 watt output and a 5 watt input. what is the gain in decibels for this amplifier, rounded to the nearest decibel?
During the early 1800s, these professionals regularly appeared in court to answer questions related to physical evidence.
chemistry
forensic science
legal
medical
Final answer:
In the early 1800s, forensic scientists, such as chemists and medical doctors, began to provide evidence in court related to physical evidence from crime scenes. Option b
Explanation:
During the early 1800s, forensic science was a field where professionals, including medical doctors and sometimes chemists, provided scientific evidence in courts to assist legal proceedings.
These individuals would analyze physical evidence from crime scenes, such as hair, blood, and other body fluids, and increasingly, DNA. They played crucial roles in determining the facts of criminal cases by examining forensic evidence left at crime scenes.
This period marked the beginning of the systematic application of science to legal processes, a practice that would grow significantly with advancements in technology and methodology. Option b
what do waves transmit?
Answer:
Waves only transport a portion of energy.
Explanation:
Let's think about some examples related to waves in nature:
An electromagnetic wave is a combination of electric and magnetic fields, both of them oscillate through space and time. That oscillation transport energy, that is bounded in little "packets" of energy called photons. So this wave transmits energy.In the case of a solid, the periodic oscillation of the molecules, this kind of oscillation transport energy too and in this particular case it is called phonons. It is just a quantum of energy related to a compression wave, as a sound or a vibration lattice in a crystal.In conclusion, waves only transport a portion of energy.
I hope it helps you!
What is the speed of sound in air at 40°C? 355 m/s 307 m/s 331 m/s 239 m/s
One hypothesis states that plate movement results from convection currents in the a. inner core. c. lithosphere. b. asthenosphere. d. outer core.
Which of the following helps explain why the planets remain in motion around the sun?
A. density
B. gravity
C. inertia
D. both gravity and inertia
For the Doppler effect to occur ?
Noah modeled a layer of the sun by showing how particles of rice move up and down in boiling water. Which layer of the sun did Noah model? Convective zone Inner core Photosphere Radiative zone
Answer:
The answer is A. Convection Zone
Hope This Helps!
Dwarf galaxies are generally only about one-fifth the size of the andromeda galaxy. true or false
Answer
Its False
Explanation
Dwarf galaxy is a small galaxy which consist of about several billion stars,
The Andromeda galaxy is a spiral galaxy is the closest big galaxy to our Milky Way. We can see the Andromeda galaxy from earth.
But it is not proved that Dwarf galaxies are only about one-fifth the size of the andromeda galaxy.
Is true that the earth's crust is made up of many tectonic plates?
8. A thin slice of silicon that contains many solid-state components is a(n)
A) Transistor
B) Intergratef circuit
C) Diode
D) Cathode-ray tube
9. A current of 6.0 amps passed through a motor that has a resistance of 5.0 ohms. Clacukate the power
A) 30 watts
B) 150 watts
C) 180 watts
D) 900 watts
If you have the answers to the Electricity and Magnetism Unit Test I'd really appreciate all of them, I have less than an hour to finish this, yikes.
Final answer:
Answer to Question 8 is B) Integrated circuit. Answer to Question 9 is C) 180 watts, calculated using the power formula P = IV where I is current and V is voltage determined by Ohm's law.
Explanation:
Solution for Question 8:
A thin slice of silicon that contains many solid-state components and is referred to in the question is known as a(n) Integrated Circuit (IC). This is because an integrated circuit consists of numerous semiconductor devices like transistors, diodes, and resistors that are fabricated onto a single piece of semiconductor material, typically silicon. Therefore, the correct answer is B) Integrated circuit.
Solution for Question 9:
To calculate the power consumed by a motor when a current of 6.0 amps passes through it and it has a resistance of 5.0 ohms, we use the formula for electrical power, P = IV (Power = Current × Voltage). Since we know the current (I) and the resistance (R), we first need to find the voltage (V) using Ohm's law, V = IR (Voltage = Current × Resistance). Plugging in the values, we get V = 6.0 A × 5.0 Ω = 30.0 V. Now we can calculate the power, P = 6.0 A × 30.0 V = 180 watts. Thus, the correct answer is C) 180 watts.
All the colors of visible light can combine to form white light.
a. True
b. False
Why is it inadvisable to make a horseshoe magnet from a flexible material? 1. a flexible material is not easily magnetized. 2. a flexible material is easily loses its magnetism. 3. none of these 4. the poles of the magnet attract each other and will cause the magnet to bend. 5. a flexible material cannot be easily made into a horseshoe shape?
Different magnetic poles are drawn to one another. The magnet will bend if it is too flexible, possibly allowing the poles to touch and reducing the magnetic field around it.
What horseshoe magnet from a flexible material?Since a horseshoe magnet's design naturally provides more strength than a bar magnet does, it quickly superseded the bar magnet in use. The magnet's poles are situated closer to one another and in the same plane thanks to the U-shape.
The majority of horseshoes are constructed of steel, though there are a few outliers. Because aluminum horseshoes are lighter and perform better when speed is the primary goal, racehorses typically wear them.
At the magnet's poles are concentrated its strongest elements. Because of this, a horseshoe shape is thought to be the strongest.
Therefore, particularly handy to produce if you need to carry heavy goods or strengthen a bar magnet.
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ASAP Which of the following has kinetic energy? a. a rock poised for a fall b. an archer’s bow that is drawn back c. a rolling bowling ball d. a car waiting at a red light
The correct answer is c. a rolling bowling ball.
Explanation:The correct answer is c. a rolling bowling ball.
Kinetic energy is the energy an object possesses due to its motion. It depends on the mass and velocity of the object. In this case, a rolling bowling ball has kinetic energy because it is moving. The other options do not involve motion and therefore do not have kinetic energy.
For example, a rock poised for a fall has only potential energy, as it does not possess motion. An archer's bow that is drawn back also has potential energy stored in the stretched bowstring, but it does not have kinetic energy until the arrow is released. A car waiting at a red light is stationary and not in motion, so it does not have kinetic energy.
What was the weight, range, and cruising speed of “the big e?
Answer:
Weight = 94,780 tons
Range = 12,500 nautical miles
Cruising speed = 62.2 km/h
Explanation:
Big E was nickname of USS Enterprise CVA(N) - 65 aircraft carrier. It is a nuclear -powered air craft and eighth United States Naval vessel.
A current of 1.8 A delivers 2.5 C of charge. How much time was required?
A.0.70 S
B.0.72 S
C.1.4 S
D..5 S
Answer: C
Explanation:
In situations where the plane of projection is not parallel to the surface of the object, the resulting orthographic view is ____.
Mosses are located in which zone of deciduous forests?
a. tree stratum
b. ground
c. shrub
d. herb
Its B- Ground, just took the test
Ground
Explanation;Mosses are located in the ground zone of the deciduous forests.Deciduous forests is a biome that has a soil that is rich and the leaves are dropped from the trees to provide a source of organic matter for the soil.Mosses plants are types of plants which belongs to the bryophyta group of plants. They lack roots and are evergreen plants that grow in a wide range of environments but are commonly found covering the ground, along the stream beds, and also at the bases of the trees in deciduous forests.On a 600-mile, a pilot can save 30 minutes by increasing her usual speed by 40 mph. find her usual speed
An airplane flies 930 miles in 75 minutes. how many miles does it fly in 5 hours and 45 minutes assuming a constant speed?
First, calculate the average speed of the airplane, which is 12.4 miles per minute. Then, convert 5 hours and 45 minutes into minutes which is 345 minutes. Multiple the speed by this time to find the distance the airplane would fly, which is 4278 miles.
Explanation:To solve this problem, we first need to figure out the average speed of the airplane. Average speed is calculated by dividing the total distance by total time. In this case, the airplane travels 930 miles in 75 minutes. So the speed is 930 miles/75 minutes = 12.4 miles/minute.
Now that we have the speed per minute, we can calculate how many miles the airplane would travel in 5 hours and 45 minutes. This time converts to 345 minutes (since 1 hour = 60 minutes). So, the airplane would fly 12.4 miles/minute * 345 minutes = 4278 miles.
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(Psychology).
Learning to listen and speak to other people can be considered part of the _____ and the _____ dimensions of development.
A. moral; physical
B. cognitive; physical
C. moral; psychosocial
D. cognitive; psychosocial
Learning to listen and speak to other people can be considered part of the C. moral and the psychosocial dimensions of development.
In the context of development, the moral dimension refers to the development of personal values, standards, and an understanding of right and wrong. This dimension is crucial for social interactions and understanding the perspectives and feelings of others, which is essential for effective communication. The psychosocial dimension of development involves the growth of one's personality, social skills, and the ability to form relationships with others. It encompasses the process of learning to listen and speak to other people, as these are fundamental social skills that enable individuals to interact and communicate effectively within their social environment.