Answer:
B. heat energy from the sun
A girl is walking a dog. The tension force applied to the dog is 20 N. If the mass of the dog is 25
kg.
what forces are being used when walking a dog and how ?
A book is placed on a table and a bike moves on a road.
Which statement is correct?
Both the book and the bike have kinetic energy.
Both the book and the bike have potential energy.
The book has potential energy and the bike has kinetic energy.
The book has kinetic energy and the bike has potential energy.
The book has potential energy and the bike has kinetic.
kinetic energy is energy possessed when a object is in motion. The bike is moving. Therefore, it has kinetic energy. The book isn't moving. Hopefully that helped
Water tends to moderate climate. Why is it warmer in the winter and cooler in the summer in cities located near the ocean or large lakes?
A.Water has a low specific heat and therefore changes temperature faster than most other substances.
B.Water has a low specific heat and therefore changes temperature slower than most other substances.
C.Water has a high specific heat and therefore changes temperature more slowly than most other substances.
D.Water has a high specific heat and therefore changes temperature more quickly than most other substances.
It is warmer in the winter and cooler in the summer in cities because water has high specific heat and therefore changes temperature more slowly than most other substances. The correct option is C.
What is climate?Climate is the average weather over a longer period of time in a particular area. A description of a climate includes details such as the typical temperature in each season, the amount of rainfall, and the amount of sunshine.
Coastal weather tends to be more moderate than continental weather, with fewer hot and cold extremes, because the ocean warms and cools more slowly than the atmosphere.
The majority of rain clouds are produced by ocean evaporation, particularly in the tropics, which affects where wet and dry regions on land are located.
Therefore, the correct option is C. Water has a high specific heat and therefore changes temperature more slowly than most other substances.
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Calculate frequency if wavelength is 35 m and wave speed is 546 m/s.
25.6 Hz
15.6 Hz
390 Hz
.06 Hz
6. A plane took 3.55 hours to complete its flight. If the distance of the flight was 2840 kilometers, at what average speed did the plane travel? Include the correct unit for full credit.
Answer:
The average speed is 10,082
Explanation:
Do the formula
Distance * time = speed
2840 * 3.55
= 10,082
What is the average speed of a car that travelled 400 miles in 6 hours?
Answer:
About 66 miles per hour
Explanation:
Based on the information given we can assume the car traveled the same number of miles every hour meaning all we need to do is divide.
400/6 ≈ 66 miles per hour
Answer
66 mph
Explanation:
400 ÷ 6 = 66.666666666666666.......
What is happening when an oxygen molecule is formed from two separate oxygen atoms?
Two from each oxygen atom. For examples of covalent bonding are water (H2O), and carbon dioxide (CO2). Covalent compounds are mostly gases or liquids with low melting points.
A car travels at uniform velocity at a distance of 100 m in 4 seconds what is the velocity of the car
Answer:
the answer is 25
Explanation:
because the formula for velocity is distance divided by time.
What is the total distance blue covered throughout its journey?
A: 8s
B: 16
C: 8m
D: 16m
When trying to simplify and find the equivalent resistance you should first simplify resistors in _ before simplifying those in _
The equivalent resistance for the parallel connected resistance will be
[tex]\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}[/tex]
What is resistance?
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω)
Now if two resistances are connected parallel then the voltage on the resistances will be different and the same current will flow from both resistances.
[tex]V_{eq}=V_1+V_2[/tex]
[tex]I_{eq}R_{eq}=I_1R_1+I_2R_2[/tex]
Since [tex]I_{eq}=I_1=I_2[/tex]
[tex]R_{eq}=R_1+R_2[/tex]
Hence the equivalent resistance for the parallel connected resistance will be
[tex]\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}[/tex]
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If Lillian weighs 500 N, what is her weight in pounds?
Answer:
112.404 Pounds
Explanation:
divide the force value by 4.448
Ava learns in her science class that the Sun is much larger than the Moon. When she looks at the Sun and the Moon in the sky, however, they appear to be about the same size. Which of the following best explains why this is true?
A.
The Moon is much older than the Sun.
B.
The Moon shines more brightly than the Sun.
C.
The Moon is much farther away from the Earth than the Sun is.
D.
The Moon is much closer to the Earth than the Sun is.
The world's longest continuous mountain ridge is under the ocean.
True
False
Please hurry!!!
Answer:
True
Explanation:
8. A man takes one minute to lift 4 bags of sugar each of weight 50N
through a height of 1.5m. Calculate the power expanded
A. 1.25W
B. 5.00W
C. 75.00W
D. 300.00W
Lunite of measurements are
Answer:
D
Explanation:
the formula is F=mgh
so now you can write it like
m= 4×50=200
200×1.5×10=30000
Can someone Please help me ?
The loudness, L, measured in decibels (Db), of a sound intensity, I, measured in watts per square meter, is defined as , where and is the least intense sound a human ear can hear. Jessica is listening to soft music at a sound intensity level of 10-9 on her computer while she does her homework. Braylee is completing her homework while listening to very loud music at a sound intensity level of 10-3 on her headphones. How many times louder is Braylee’s music than Jessica’s? times louder 3 times louder 30 times louder 90 times louder
Answer:
3 times louder
Explanation:
The Loudness in decibel Db L = 10㏒(I/I₀) where I = sound intensity level and I₀ = threshold of hearing = 10⁻¹² W/m².
Now, for Jessica, I₁ = sound intensity level of Jessica's music = 10⁻⁹
and I₂ = sound intensity level of Braylee's music = 10⁻³
So, substituting the variables into the equation, we have
L₁ = 10㏒(I₁/I₀)
L₁ = 10㏒(10⁻⁹/10⁻¹²)
L₁ = 10㏒(10³)
L₁ = 3 × 10㏒10
L₁ = 30㏒10
L₁ = 30 dB
Now, for Braylee, I₂ = sound intensity level of Braylee's music = 10⁻³
So, substituting the variables into the equation, we have
L₂ = 10㏒(I₁/I₀)
L₂ = 10㏒(10⁻³/10⁻¹²)
L₂ = 10㏒(10⁹)
L₂ = 9 × 10㏒10
L₂ =90㏒10
L₂ = 90 dB
So, the number of times Braylee's music is louder than Jessica's music is L₂/L₁ = 90 dB/30 dB = 3
So, Braylee's music is 3 times louder than Jessica's music
Answer:
3 times louder than Jessica's music
Explanation:
Adding energy (_____) causes the temperature to _____ OR the phase to change. Removing energy (flows______) causes the temperature to ___ OR the phase to change. When the phase changes, the temperature ______ because the ______ are breaking or forming. When energy is added to a solid, a liquid, or a gas, but the temperature is increasing (no phase change), the molecules are moving ______. A phase change will start to occur when the kinetic energy of the particles is ______ the attractive forces between the particles.
IF U GIVE ME ALL OF THESE MISSING WORDS ILL GIVE U 50 POINTS
Answer:
ndndnskiaidjdjjdndndkkskdldo
pls help Which one of the following is NOT acceleration
A.
a change in mass
B.
a change in direction
C.
an increase in velocity
D.
a decrease in velocity
Answer:
C
Explanation:
Am increase in velocity?
Answer:
change in mass is not acceleration
One of the most dangerous side effects of an erupting volcano is a
Answer:
One of the most deadly effects of a volcano is the ash coming from the eruption, which carries poisonous gases that are harmful to humans, plants, and animals alike.
Explanation:
:))))))))
Pleaseeeeeee, help me, I need youuuu!!!!!!
How can you derive an expression for the block's centripetal acceleration in terms of mass and an angle, and physical constants, as appropriate?
Answer: cause yes they can
Explanation:
How does u know
Which two types of energy are being produced in the picture?
A
electrical energy and light energy
B
electrical energy and sound energy
C
mechanical energy and light energy
D
mechanical energy and sound energy
Answer:
dion sanders
Explanation:c
Question 7 (5 points)
(03.06 LC)
Losing
or fewer per week is a healthy rate of weight loss. (5 points)
Answer:
true?
Explanation:
Explain how surface waves can have characteristics of both longitudinal waves and transverse waves. Please use 3 content related sentences
Answer:
they can have both ways because it turns out that they can go into different ways light waves are associated with constantly like her to certain ways or
most people use the term light waves when they usually mean visible light in physics however these terms like veins are trying to be used as a synonym of electronic waves electric razor made of skull in magnetic and electric field like always they carry energy
During which process does layer upon layer of sediment build up, exerting pressure on the layers below?
a. erosion
b. compaction
c. conglomerate
d. weathering
The light is most intense where it strikes Earth _______ to its surface.
Answer: The sun's rays strike Earth's surface most directly at the equator. This focuses the rays on a small area. Because the rays hit more directly, the area is heated more.
The light is most intense where it strikes Earth's surface most directly at the equator
The sun's rays strike Earth's surface most directly at the equator. The rays are focused on a narrow area as a result of this. The area is heated more because the sunlight touch it more directly.The incoming solar radiation is more direct (almost perpendicular or closer to a [tex]90[/tex] degree angle) when the sun's rays contact the Earth's surface near the equator. As a result, solar energy is focused over a smaller surface area, causing temperatures to rise.For more information:
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You and your younger sister (who weighs half as much you do) are at a skating rink. You are both wearing roller skates and are facing each other. What will happen to your and your sister's motion if you push against each other?
Question 1 options:
You move forward and your sister moves backward at a faster rate.
You both move forward, but you accelerate at a greater rate.
You move backward and your sister moves forward at a faster rate.
You both move backward but your sister accelerates at a greater rate.
Question 2 (1 point)
You are standing, completely still, on a completely flat floor. Why do you stay as you are instead of flying into the air?
Question 2 options:
There are no forces acting on you or the floor.
Forces are only acting on the floor.
All of the forces acting on you are balanced.
You are exerting an unbalanced force on the floor.
Question 3 (1 point)
A baseball is thrown at 90 mph from east to west over a distance of 60 ft. What is true of the ball's motion?
Question 3 options:
Its speed is 90 mph to the west.
Its acceleration is 30 mph.
Its velocity is 90 mph to the west.
Its acceleration is 150 mph.
Question 4 (1 point)
A box is pushed 7 m to the left in 3 s. What is the block's average speed to the nearest tenth?
Question 4 options:
2.33 m/s
0.43 m/s
2.3 m/s
0.4 m/s
Question 5 (1 point)
graph
On a graph of distance vs. time, what is true of the motion of the object during its first 6 m of travel?
Question 5 options:
The object was moving at a constant speed.
The object was accelerating.
The object was not moving.
The object was northbound.
Answer:
It is D
Explanation: Use of these terms stretches back to World War I. One American field order from September 1918 noted, “The First Army will attack at H-Hour on D-Day with the object of forcing the evacuation of the St. Mihiel salient.” Other nations had their own shorthand. In World War I, the French used the code date “le Jour J,” while the British called their operation start days “Z-Day” and “Zero Hour.”
Hope this helps
You and your younger sister (who weighs half as much you do) are at a skating rink. You and your sister's both move backward but your sister accelerates at a greater rate.
What is acceleration?The time rate of change of velocity with time.
As both are holding each other, they will be pushed backwards because the skating they wear makes them to move backwards. The equal and opposite force is applied on each other.
The force F =mass x acceleration.
The lesser mass greater will be the acceleration. Your sister with half weight of yours will accelerate more.
Thus, you and your sister's both move backward but your sister accelerates at a greater rate.
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What is the linear momentum of a car of mass 1000 kg that is moving at a speed of 20 m/s?
а
Oь
50 kg m/s
0.02 kg m/s
20000 kg m/s
2000 kg m/s
Od
The correct option is 20000 kg m /s.
What is Momentum ?
Momentum is a concept in physics that describes an object's tendency to continue moving in its current direction at a constant speed. It is a vector quantity, meaning it has both magnitude and direction. The momentum of an object is defined as the product of its mass and velocity, and is represented by the equation: p = mv, where p is momentum, m is mass, and v is velocity.
In simple terms, momentum can be thought of as the "motion" of an object, and the larger the mass and velocity of an object, the greater its momentum. Momentum is a conserved quantity, which means that the total momentum of a system remains constant unless acted upon by an external force.
Given , Mass = 1000kg
Speed = 20 m/s
momentum = mv = 20000 kg m /s
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Explain the law of inertia in your own words.
A
An object at rest will remain at rest unless acted on by a force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by a force.
Explanation:
Answer:
Law of inertia is Newton's first law of motion..
Explanation:
It means that a body will tend to be in it's motion or tend to move in a straight line unless any external force is acted upon it..
Eg: while you are travelling in bus.. If breaks are suddenly applied your body falls forward because you were in motion with bus but it tries to be in motion when breaks are applied...