Answer:
greater than
Explanation:
thats my answer
A rock is thrown straight up with an initial speed of 15.5 m/s . It is caught at the same distance above the ground . How high does the ball rise? How long does the ball remain in the air?
Answer:
The height risen by the rock is 12.26 mThe time spent in air by the rock is 3.16 sExplanation:
Given;
initial velocity of the rock, u = 15.5 m/s
at maximum height the final velocity of the rock, v = 0
The height risen by the rock is calculated as follows;
v² = u² - 2gh
0 = u² - 2gh
2gh = u²
h = u² / 2g
h = (15.5²) / (2 x 9.8)
h = 12.26 m
The time spent in air by the rock is known as time of flight, which is calculated as follows;
v = u - gt
0 = u - gt
gt = u
t = u/g
where;
t is the time to reach maximum height
t = 15.5 / 9.8
t = 1.58 s
Time of flight (time spent in air) is calculated as;
T = 2t
T = 2 x 1.58 s
T = 3.16 s.
The frequency will be 6 × 1014 H z of a typical green photon of 500nm emitted by the Sun. a. TRUE
b. FALSE
Under the Big Top elephant, Ella (2500 kg), is attracted to Phant, the 3,000 kg
elephant. They are separated by 8 m. What is the gravitational attraction between
them?
Under the Big Top elephant, Ella (2500 kg), is attracted to Phant, the 3,000 kg elephant. They are separated by 8
10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of total turns is obtained 25mm. then a) What is the thickness of the wire? b) Express the thickness of the wire in centimetre.
Answer:
1. 2.5 mm
2. 0.25 cm
Explanation:
Since the length of the 10 turns of the wire around the pencil is 25 mm, then;
1. the thickness of the wire = [tex]\frac{length of total turns}{number of turns}[/tex]
= [tex]\frac{25}{10}[/tex]
= 2.5 mm
The thickness of the wire is 2.5 mm.
2. Since 10 mm = 1 cm, then;
25 mm = 2.5 cm
So that,
the thickness of the wire in centimetre = [tex]\frac{length of total turns}{number of turns}[/tex]
= [tex]\frac{2.5}{10}[/tex]
= 0.25 cm
The thickness of the wire is 0.25 cm.
Which of these materials is permeable?
Which change is an example of transforming potential energy to kinetic energy?
changing thermal energy to electrical energy
changing mechanical energy to chemical energy
changing nuclear energy to radiant energy
changing radiant energy to electrical energy
Answer:
changing nuclear energy to radiant energy
Changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
What is kinetic energy?Kinetic energy is a type of motion energy (i.e., energy in movement), which is used to perform work.
Conversely, potential energy is a type of energy stored in an object, which can be converted to kinetic energy.Nuclear energy is a type of potential energy because this energy is stored in the atomic nucleus.In conclusion, changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
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If the charge 16 C flows through the lightening during time 0.002 s then the AVERAGE current is equal to
80 A
8000 A
80000 A
0 A
Other:
Answer:
the average current is 8000 A
Explanation:
I got it answered by an expert
Pedro picked up and held a cube of ice in his hand and noticed that he no longer felt a difference in temperature after the ice cube melted in his hand. Which of the following statement best explains what happened?
1.Heat was transferred from Pedro’s hand to the ice increasing the temperature of the ice.
2.Heat was released from the ice cube into the air increasing the temperature of the ice.
3.Cold was transferred to Pedro’s hand from the ice increasing the temperature of the ice.
4.Heat was released from Pedro’s hand into the air melting the ice increasing the temperature of the ice.
Answer:
the answers is 1.
Explanation:
this is because heat always travel's from the warmest object to the coldest. His hands thermal energy is transferred to the ice making the ice round to the same temperature of his hand. This can also be an example of equalibrum.
why do colliding objects of unequal mass experience different effects
PLEASE if you see these people (they all seem to have the same profile picture) NOTIFY THE PERSON ASKING THE QUESTION THAT THIS IS MALWARE AND REPORT IT!!
Stay safe, everyone!
(posting this in all subjects)
Answer:
ʕ •ᴥ•ʔ
Explanation:
4. Without the sun, there would be no way to replace energy released into the environment. True or False
Answer:
true
Explanation:
Can someone please help me with science
Answer:
The mass is one of the factors affecting gravitational field strength.
Weight (Force) = mass × gravitational field strength
= 0.10 × 10 (10 is the fixed gravitational field strength on Earth)
= 1.0 N
6. Explain how you could increase the potential energy of an object. *
Answer:
a doubling of the height will result in a doubling of the gravitational potential energy.
Explanation:
what is wavelength ??? sound is heard louder in newly furnished room why?
Answer:
Wavelength is the distance fromone crest to another or from one troughtto another of a wave is called wavelength.
Compare and contrast O2 and F2.
Answer:
1) Similarity:
1. diatomic molecules.
2. nonpolar covalent bond.
3. gaseus state at room temperature.
4. very reactive, with high electronegativity.
Assume that a vaulter is able to carry a vaulting pole while running as fast
as Carl Lewis in his world record 100-m dash (around 12 m/s). Also assume
that all of the vaulter's kinetic energy is transformed into gravitational
potential energy. What vaulting height could that person attain?
(Hint: Use the equation 5 mu? = mgh.)
Answer:
5mu = carry a vaulting pole ( 12 m/s) Also
fast
All the vaulter's kinetic energy is transformed into gravitational potential energy. 7.35m is the that person's height.
What is kinetic energy ?Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. After work is completed, energy is transferred to the object, and the object moves at a new constant speed.
The two most important factors influencing kinetic energy are mass and speed. Because an object's motion is determined by its velocity as well as its mass, though velocity is th
Given:
v = 12m/s
g = 9.8 m/s²
Kinetic energy = potential energy
K.E = P.E
1/2 mv² = mgH
H = v² /2g
H = 7.35m
Thus, 7.35m is the that person's height.
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A series of four different cylinders were each subjected to a force by placing four different masses on top of them. The mass placed on each cylinder
and dimensions of each cylinder are shown below. Rank the stress on these cylinders from least to greatest.
Mass (kg) Diameter (cm) Height (cm)
Case
A
B
С
D
5.2
3.6
4.7
2.9
2.6
2.3
2.7
32.2
32.5
27.3
16.9
Answer:
C, B, D, A
Explanation:
Stress is F/A, where F = 9.8*mass and A = pi(d/2)^2
Do the math for each and the stress from least to greatest is C, B, D, A.
The height column is unnecessary information.
When four different cylinders(A,B,C,D) were each subjected to a force by placing four different masses on top of them. the Rank of stress on these cylinders from least to greatest is D, C, B, A.
What is Stress ?Stress is defined as applied force(F) per unit cross sectional area(A) on which force is applied. it I.e. Stress = F/A. its SI unit is N/m². More force on small area leads to higher stress.
Given,
For A
Mass m = 5.2 kg
Diameter = 2.6 cm
Radius r = 1.3 cm = 0.013 m
Height = 32.5
Stress on A = Force ÷ A = mg ÷ πr²
Stress = (5.2×9.8) ÷ (3.14×0.013²)
Stress = 96031 N/m²
For B
Mass m = 3.6 kg
Diameter = 2.3 cm
Radius r = 1.15 cm = 0.011 m
Height = 27.3
Stress on B = Force ÷ A = mg ÷ πr²
Stress = (3.6 ×9.8) ÷ (3.14×0.011 ²)
Stress = 92856 N/m²
C
Mass m = 4.7 kg
Diameter = 2.7 cm
Radius r = 1.35 cm = 0.0135 m
Height = 16.9
Stress on C= Force ÷ A = mg ÷ πr²
Stress = (4.7 ×9.8) ÷ (3.14×0.0135²)
Stress = 80487 N/m²
D
Mass m = 2.9 kg
Diameter = 32.2 cm
Radius r = 16.1 cm = 0.16 m
Stress on D = Force ÷ A = mg ÷ πr²
Stress = (2.9×9.8) ÷ (3.14×0.16²)
Stress = 353 N/m²
Hence Rank of stresses on the 4 cylinders are D, C, B, A
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Newton’s 3rd law is for every action, there is an equal and opposite reaction
True of false
Answer:
true
Explanation:
newton's third law of motion states that if body A exerts a force on the body B, then body B will exert an equal and opposite force on body A,
this is called action reaction pair
hope this helps
Please help!!!! I need a good grade on this test !!!! Plssss
Answer:
There’s nothing in the pic
Explanation:
Just like my bf ... nonexistent
Sean applies a force of 100N to move a box 5 meters. How much work did he do?
Answer:
500 Joules
Explanation:
W(work)= force * distance
w = 100*5
W= 500
Plssss help———what is the difference between the weight of an object and the mass of an object? (Needs to be 4-5 complete sentences)
The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.
If you walk at an average speed of 5 km/h for 30 minutes,
how far will you walk?
Answer:
150
Explanation:
30 times 5 = 150 i think
A car has a mass of 1500 kg. It is traveling at a speed of 0.52 m/s. What is the kinetic energy of the car?
a.202.8 J
b.202.8
c.390 J
d.390
Answer:
c
Explanation:
how can we realize that light travel in straight line ?
Answer:
It can be seen from the operation of pin-hole camera, formation of shadows and eclipse.
Explanation:
The phenomenon of light traveling in a straight line is known as rectilinear propagation of light.
One this evidence can be seen from the operation of pin-hole camera, which depends on rectilinear propagation of light
Also two natural effects that result from the rectilinear propagation of light are the formation of Shadows and Eclipse.
This project will allow you to “see” the difference between AC and DC.
You will need the following:
• Metal plate or pan
• Paper clip
• Piece of cloth
• Cornstarch
• Potassium iodide (available at a pharmacy)
• 9 volt battery
• 3 insulated wires with the insulation stripped off the ends
• Low voltage bell transformer (available at electronics or hardware stores)
Follow these steps:
1. Soak the piece of cloth well in a thick solution of cornstarch and water mixed with the
potassium iodide.
2. Lay the metal plate or pan with the bottom up. Wring the cloth out and lay it across the
metal plate or pan.
3. Use a wire to connect the negative terminal to one edge of the pan, using an alligator clip
or paper clip.
4. Connect the other wire to the positive end, and then slowly stroke the exposed end across
the cloth. (The electric current frees the iodine from the potassium iodide, making a dark
blue mark.) What pattern do you see? What kind of current are you using? Write your
answers.
Answer: uhhhhhhh what is this for?
Explanation i so confused
What has gravity led scientists to understand?
Answer:
Gravity is a non-contact force that was observed famously by Sir Isaac Newton, who watched an apple falling from a tree to the ground. ... Newton was the first to realise that gravity existed in space and it was the force which holds the Moon in orbit around the Earth and planets in orbit around the Sun.
Answer:
Newton's theory had prove that all objects, as small as an apple and as large as a planet, are subjected to gravity. Gravity helped to keep the planets rotating around the sun and creates the ebbs and flows of rivers and tides.When do sunspots disappear?
A) Sunspots are always present and NEVER disappear.
B) Once the magnetic field weakens in the area and cold plasma enters the area of the sunspot
C) Once the magnetic field weakens in the area and hotter plasma enters the area of the sunspot
D) Once the magnetic field strengthens in the area and hotter plasma enters the area of the sunspot
Answer:
In 5 years or so, the sun will be awash in sunspots and more prone to violent bursts of magnetic activity.
Explanation
once the magnetic field weakens the area and cold plasma enters the area of the sunspot
Answer
The answer is C I took the test an got an A.
Explanation:
K12 ASTRONOMY 7.07.04
This process releases a large amount of . Energy ,oxygen ,or water
Answer:
carbon dioxide i think please be right
What is the ideal mechanical advantage of a ramp with a height of 3.5 and a length of 14.0 meters
Answer:
ghj
Explanation:
help plz ??????????what’s the answer
Answer:
Gtvybhnhufv
Vvghccg. cguvtj. ohcswtil
Explanation:
Windowing. Undisturbed. Undisputed. JDownloader infidel into JDownloader krypton JDownloader kcfu kcfu