Answer:
20 cm
Explanation:
Given that a ball is released from a vertical height of 20 cm. It rolls down a "perfectly frictionless" ramp and up a similar ramp. What vertical height on the second ramp will the ball reach before it starts to roll back down?
Since it is perfectly frictionless, the Kinetic energy in which the ball is rolling will be equal to the potential energy at the edge of the ramp.
Therefore, the ball will reach 20 cm before it starts to roll back down.
a chemical reaction a temperature change may occur because of the breaking or formation of chemical bonds that release excess energy. Since there is a change in temperature why wouldn't this reaction be considered a physical change instead of a chemical change ?
Answer:
Explanation:
in some reactions we see this as a change in the temperature. ... The study of energy changes (particularly heat) in chemical reactions is known as ... When a chemical reaction occurs, bonds in the reactants break, while new bonds form in the product. ... Physical changes can also be classified as exothermic or endothermic.
Which describes an object in projectile motion?
Gravity acts to push the object sideways.
The object moves in a straight path.
The forward velocity of the object is 0 m/s.
The object's inertia carries it forward.
Answer:
D: The object's inertia carries it forward.
Explanation:
Answer:
The answer is d
Explanation:
In the earth-moon system the moon orbits the earth. What is the "centripetal" force causing the moon to stay in orbit around the earth
The centripetal force is the gravitational force of attraction between the Earth and the Moon.
Also, the gravitational force of attraction between the Earth and the Sun is the centripetal force that causes the Earth to stay in orbit around the Sun.
Also, the gravitational force of attraction between a TV satellite, a weather satellite, or a GPS satellite and the Earth is the centripetal force that causes each satellite to stay in orbit around the Earth.
(Please help ASAP)
The density of an object is how much matter it contains.
True of False?
Answer:
I think its true? do your research to be 100% sure
Explanation:
Answer: true
Explanation:
Density, mass of a unit volume of a material substance
Scientists might model volcanic eruptions using a computer model. What is
the biggest benefit of this model?
Scientific model of volcanic eruptions using computer programming is very helpful to identify their origin and consequences. The biggest benefit of these model is to identify the physical behaviors of magma .
What are scientific models ?Scientific model are used to visualize the complex theories and concepts. There are both theoretical models and visual models. Nowadays complex problems and processes are easily solving using well designed computer programmes and simulations.
By creating a sophisticated computer model based on the most recent physical understanding of magma behavior, its most likely path of least resistance, and statistical information obtained from prior volcanic eruptions, scientists was able to address these issues.
They were able to predict the site of historical events that were not used to fine-tune the model by using historical data collected from Campi Flegrei, a caldera close to Naples, Italy etc.
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Answer:
Using a model is less hazardous than being up close to a real Volcano
Explanation:
when an electric current runs through a wire, a magnetic field is induced
Answer:
yes it is
Explanation:
SOMEONE PLEASE HELP!
Answer:
I THINK option A is correct
Explanation:
because the electrostatic force is directly proportional to product of charges
now if the force between two electron is F charge on electron is same so their product is positive now the charge on proton is +ve and on electron is -ve so their product is -F
Which of the following is NOT an early sign of heat illness?
Dizziness
Headache
Flushed face
Excessive sweating
Struggling to perform
Struggling to perform is not an early sign of heat illnesses.
There are times when the body system will be unable to dissipate heat effectively. When this happens, heat illness bounds to occur.
Also, heat illnesses tend to occur when the balance of salt and water in the body becomes unbalanced, the temperature rises unexpectedly or the sweet couldn't keep an individual cool.
Some of the early signs includes Headache, dizziness, Muscle cramps, weak pulse among other related symptoms.
Based on the above explanation, we can see that struggling to perform is not an early sign of heat illnesses.
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Differentiate between static friction and sliding friction.
Answer:
Static friction prevents the motion of an object while sliding friction is a type of frictional motion between two surfaces in contact.
Explanation:
How much ground do you travel if you travel for 161.65 seconds at a speed of 58.01
Explanation:
Hey there!
Given,
Speed (s)= 58.01m /s
Time (t) = 161.65s
Now, Using distance formula.
[tex]d = s \times t[/tex]
Put all values.
[tex]d = 58.01 \times 161.65[/tex]
Multiply them.
[tex]d = 9377.3166m[/tex]
Therefore the distance is 9377.31m.
Hope it helps..
A tennis ball is dropped from 1.16 m above the
ground. It rebounds to a height of 0.866 m.
With what velocity does it hit the ground?
The acceleration of gravity is 9.8 m/s
Answer:
Vf = 4.77 m/s
Explanation:
During the downward motion we can easily find the final velocity or the velocity with which the ball hits the ground, by using third equation of motion. The third equation of motion is given as follows:
2gh = Vf² - Vi²
where,
g = acceleration due to gravity = 9.8 m/s²
h = height = 1.16 m
Vf = Final Velocity of Ball = ?
Vi = Initial Velocity of Ball = 0 m/s (Since, ball was initially at rest)
Therefore, using these values in the equation, we get:
(2)(9.8 m/s²)(1.16 m) = Vf² - (0 m/s)²
Vf = √(22.736 m²/s²)
Vf = 4.77 m/s
A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answer:
384 m
8.53 m/s
Explanation:
Given:
v₀ = 90.1 m/s
v = 0 m/s
a = -10.56 m/s²
Find: Δy and t
v² = v₀² + 2aΔy
(0 m/s)² = (90.1 m/s)² + 2 (-10.56 m/s²) Δy
Δy = 384 m
v = at + v₀
0 m/s = (-10.56 m/s²) t + 90.1 m/s
t = 8.53 s
What does acceleration measure
Answer:
Change in velocity
Explanation:
a-p-e-x
Acceleration measures the rate of change of velocity with respect to time. It describes how quickly an object's velocity is changing over time. Acceleration can be positive, negative, or zero. The standard unit for acceleration in the International System of Units (SI) is meters per second squared (m/s²).
Mathematically, acceleration (a) is defined as the change in velocity (Δv) divided by the change in time (Δt):
a = Δv / Δt
Acceleration has both magnitude (how much the velocity changes) and direction. When an object's velocity increases, its acceleration is positive. When the velocity decreases, the acceleration is negative.
The standard unit for acceleration in the International System of Units (SI) is meters per second squared (m/s²), which represents how many meters per second the velocity changes in one second.
However, other units like miles per hour squared (mi/h²) or kilometers per hour squared (km/h²) can also be used depending on the context.
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The Fitness Gram push-up test is a measure of
A).muscular definition
B).muscular strength
C).muscular endurance
D).flexibility
Answer:
The answer is B.
Explanation:
I meant B. not C so sorry
Answer:
the push up test assesses C.) muscular endurance
Explanation:
The speed and direction of a moving object referred to as which of the following
A. Distance
B.speed
C.velocity
D.time
Answer:
velocity.
Explanation:
velocity includes both speed and direction of the motion!
difference between simple and complex machine
Simple Machine: Any of various devices that function in a manner basic to any machine, such as a lever, pulley, wedge, screw, or inclined plane. Complex Machine: A device consisting of two or more simple machines working together.
Please help me answer this question !
2. Which ocean/sea formed from the rifting of North and South American away from Europe and Africa?
A. Red Sea
B. Pacific Ocean
C. Black Sea
D. Indian Ocean
E.Mediterranean Sea
F. Atlantic Ocean
Byu
Answer:
probably F. Atlantic Ocean
Explanation:
hope it helps.
Two movers use a ramp to load a piano into a truck
• Describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck
Enter your answer in the space provided
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
What is mechanical energy?The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.
As given in the problem, two movers use a ramp to load a piano into a truck, we have to describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
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6. Interpret the following graphs and answer the questions below. a Which sounds have a higher frequency than A? b. Which sounds have a lower frequency than A? c. Which sounds all have the same pitch? d. Which sounds are louder than A? e. Which sound has a higher pitch than A, but is at the same volume? f. How would sound D sound compared to A?
Answer:
a) Frequency is inversely proportional to the wavelength, then the graphs with smaller wavelengths than A have larger frequency than A.
The correct options are: B and C.
b) The opposite as above, in this case the correct options are: D and E.
c) The ones with the same wavelength will have the same pitch:
A and F seems to have the same wavelength.
B and C also seems to have the same wavelength.
d) The vertical height of the peaks are related to the louder sounds, then the sounds louder than A are: B and F.
e) The one that has a higher pitch (or smaller wavelength) and the same amplitude than A is C.
(you need to measure the height of the peaks in both graphs, and see that are equal).
f) D has a larger wavelength than A, so it would sound "lower", and both waves have the same amplitude, so the loudness will be the same.
What happens to the light rays when they hit the specimen?
a) They are focused into a small area towards the objective lens.
b) They are absorbed by the stage.
c) They are reflected, refracted, or absorbed by the specimen.
d) They are diverted to the ocular lens.
Answer:
C
Explanation:
Ray of light when hits any specimen or object. The light is partially reflected, partially reflected and partially absorbed. It is never completed reflected, refracted or absorbed. Hence, the correct answer would be c.
QUESTION 1
Describe the motion of the car in the following picture.
The car is slowing down.
The car is not moving.
The car is speeding up
The car is moving at a constant velocity
Answer:the car is speeding up
Explanation:
state Pascal's principle of transmission of pressure
Answer:
Pascal's law (also Pascal's principle or the principle of transmission of fluid-pressure) is a principle in fluid mechanics given by Blaise Pascal that states that a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.
Explanation:
Pascal's law says that pressure applied to an enclosed fluid will be transmitted without a change in magnitude to every point of the fluid and to the walls of the container. The pressure at any point in the fluid is equal in all directions.
is anyone good at physics who can help me??
A dog trots from -11 m to 4 m in 14 s . whats is its velocity ?
Answer:
1.07 m/s
Explanation:
This is a simple speed distance time question.
first, we need to determine the distance between -11 and 4.
(think of a number line).
We add 4 to 11 using absolute value (i.e taking away negatives), and we get 15 m, our distance. We are attempting to find speed, and we have our time.
Speed is distance/time.
Now we have our equation, we plug in our variables.
speed (aka velocity)= 15/14.
speed= 1.07142857143
If we round to 2 place values, our speed is 1.07 m/s.
The velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship.
What is the distance?Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.
It is given that:
A dog trots from -11 m to 4 m in 14 s.
As we know, the speed-distance-time relationship:
Speed = distance/time
The distance = 4 - (-11)
The distance = 4 + 11
The distance = 15 m
Time = 14 seconds
Speed = 15/14
The velocity of the dog's trots is:
Speed = 1.07 m/second or 1.07 m/s
Thus, the velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship if the dog trots from -11 m to 4 m in 14 s.
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CAN SOMEONE PLEASE ANSWER THIS?!?!
Your best friend wants to run a 5K with you next year in next year. you are terribly out of shape so you want to slowly start training to be ready if I have K is 5KM and you have decided to break this distance in the smaller amount you will use to help you train and meet your goal convert five KM to meters to help you reach your training all use any method you prefer provide your answer in the scientific notation in standard form and show your work.
Answer:
5 km=5 × 10³ m
Explanation:
1 km=1 × 10³ m
Using unitary method,
5 km= 5×10³ m
Hope it helps.
What is electrical conductors and insulators?
Answer:
In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.
Explanation:
because it is
How does wind and water circulate the globe?
Answer:
The winds pull surface water with them, creating currents.
Volume can be measured in:
A. cubic centimeters.
B. centimeters.
C. square centimeters.
Answer-
A. cubic centimeters.
Hope this helps!
Answer:
A. cubic centimeters.
Explanation:
Volume can be measured in:
A. cubic centimeters = volume
centimeter = length.
square centimeters = area
During a launch, a space shuttle increases its speed starting from 6 seconds to
17 seconds. The space shuttle's speed increased from 25 m/s to 63 m/s. What
was the average acceleration of the shuttle?
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (63 m/s − 25 m/s) / (17 s − 6 s)
a ≈ 3.45 m/s²
There is also one question describe the difference between velocity and a acceleration
Answer: The difference between velocity and acceleration is that velocity is the current speed while acceleration is the increase in speed.
Explanation: Hope this helps.
whats another way to say mass is the amount of matter
Answer:
Mass is an substance which occupies space
Explanation:
Answer: a coherent, typically large body of matter with no definite shape.
Explanation:
