Answer:
positive gradient
Negative gradient
Explanation:
An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a Negative gradient.
A straight line sloping upward to the right represents a positive gradient while a straight line sloping downward to the right represents negative gradient.
An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a negative gradient.
An object's acceleration describes its change in speed.
If the speed of an object increases with time, its graph will have a positive gradient.
If an object slows down, its graph will have a negative gradient.
The gradient of a graph is the slope of the line. In the case of a speed-time graph, the gradient of the graph represents the acceleration of the object. If the gradient of the graph is positive, the object is accelerating. If the gradient of the graph is negative, the object is decelerating.
When an object's speed increases, the graph of its speed-time will have a positive gradient. This is because the object is getting faster over time, which means that its acceleration is positive.
When an object's speed decreases, the graph of its speed-time will have a negative gradient. This is because the object is getting slower over time, which means that its acceleration is negative.
Hence, An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a negative gradient.
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Explain that sound is a longitudinal wave that has a frequency, wavelength, and speed.
What phase of the moon comes directly before a full moon?.
What is the kinetic energy of a 1.000 g bullet traveling at 1,000 m/s?
Answer: B
Explanation:
The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:
[tex]1g*\frac{1kg}{1000g} =1*10^-^3kg[/tex]
Kinetic energy is defined to be:
[tex]KE=\frac{1}{2} mv^2[/tex]
[tex]KE=\frac{1}{2} (10^-^3kg)(1000m/s)^2[/tex]
[tex]KE=500J=5*10^2J[/tex]
A steel wire 0.72 m long has a mass of 5 x 10⁻³ kg. If the wire is under a tension of 60N, what is the speed of the transverse waves on the wire?
Answer:
93m/s
Explanation:
Solution,
Here,
Length(l)=0.72m
Mass(m)=5x 10⁻³
T=60N
As we have
v=√T/μ
And
μ=m/l
μ=5 x 10⁻³ /0.72
Now
v=√60×0.72/5 x 10⁻³
v=√8640
v=92.95m/s=93m/s
can someone please answer this ill give you brainliest and your getting 100 points.
Answer: i think its b
Explanation:
Answer:
All of the above
Explanation:
Extraction of fuel will affect fuel price so there will be social and economic costs. Extraction from the environment will have environment cost. It is also a political decision with political cost.
So the answer is all of the above.
Four objects are being tested to see how they are affected by fluid friction. Object W has a surface area of 4. 5 cm2, Object X has a surface area of 2. 5 cm2, Object Y has a surface area of 6. 2 cm2, and Object Z has a surface area of 3 cm2. Which object would experience the most fluid friction? W X Y Z.
Answer: the most affected object by friction is the Y
Explanation:
The fluid friction consists of 2 parts.
viscous resistance and friction with air.
assuming that the objects are in contact with the air, the situation is described by the following equation.
with: C= numerical drag coefficient
p= density
A= Area of the object
v= velocity
so assuming the other variables are constants the area of the object is directly proportional to the fluid friction
Suppose you had an electrical circuit and decided to change it into a new circuit. does the equivalent resistance of the new circuit compare to the old one ? If you were to insert additional resistors in series, how 。
a. No effect on the equivalent resistance
b. The equivalent resistance decreases
c. The equivalent resistance increases
Answer:
Yes becuase the circuit is fryed like sum french fries so yes yes is the yes option yes okay, yes but no
Explanation:
If you were to insert additional resistors in series, the equivalent resistance increases. The correct option is c.
What is equivalent resistance?The resistances when connected in series has the equivalent resistance equal to the sum of all the individual resistances.
In the series circuit, the equivalent resistance is
Req= R₁ + R₂ + R₃
Suppose you had an electrical circuit and decided to change it into a new circuit.
The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance.
Yes, the equivalent resistance of the new circuit compare to the old one.
If you were to insert additional resistors in series, the equivalent resistance increases.
Thus, the correct option is c.
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Why does an iron nail sinks in water but a wooder cork floats on water?
Answer:
Because nail is made of metal
During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race What was the rate of acceleration during this time?
Answer:
1.6m/s²
Explanation:
It was difficult to type the answer here
During a race, a horse's speed increases from 65 m/s to 73 m/s during the last 5.0 seconds of that race, 1.60 m/s² was the rate of acceleration during this time.
What do you mean by an acceleration ?The rate of change of velocity is defined as acceleration. Acceleration usually indicates that the speed is changing, but this is not always the case. When an object moves in a circular path at a constant speed, it is still accelerating because its velocity direction changes.
Acceleration occurs when the speed of an object increases or decreases, or when it changes direction. Acceleration, like velocity, has two types: average and instantaneous.
a = v - v₀ / t
Then, a = 73 × 65 / 5
a = 1.60 m/s²
Thus, 1.60 m/s² was the rate of acceleration during this time.
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differentiate between loadstone and bar magnet
Answer:
Explanation:
Permanent (Bar) Magnet. —-) Electromagnet
They are permanently magnetized. —-) These are temporarily magnetized.
Which of the following is not an example of an electromagnetic wave.
A. microwaves
B. sonar
C. visible light
D. ultraviolet
Answer:
microwaves
Explanation:
Among the following, the wave which is not an example of the electromagnetic wave is water wave. Thus, the correct option is B. Explanation: Electromagnetic waves are produced as a result of the vibrations between the electric and magnetic fields. Examples of electromagnetic waves are X-ray, lightwave, radio wave, microwave, etc.
what is the name of Li1S
What would happen if everyone on earth screamed at the same time?.
Answer:
There would be a huge sound like an applause. At 200 decibels (the loudest possible sound ever created on Earth), it could shatter ear drums.
Explanation:
Hope this helps
If everyone on the planet screamed at the same moment, it would be a tremendously loud and chaotic event.
The particular impacts and repercussions, however, would be dependent on a variety of parameters such as the strength of the screams, the length, and the location of persons.
The cumulative cries of billions of individuals would produce a deafening loudness, perhaps reaching levels far beyond what the human ear can handle.
Thus, those in close proximity to people yelling may experience discomfort, confusion, and even bodily pain as a result of the loudness.
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How can scientists best confirm and validate the results of an experiment so they can publish their findings?
by removing the control from the experiment
by adding more variables to the experiment
by decreasing the number of trials
by creating a replicable experiment
I think by adding more variables to the experiment.
A sound wave has a frequency of 695 Hz in air
and a wavelength of 0.49 m.
What is the temperature of the air?
Relate the speed of sound in air to temperature in units of Kelvin, but answer in units
of Celsius.
Assume the velocity of sound at 0 ◦C is
332 m/s.
Answer in units of degC
This question involves the concepts of the speed of sound, frequency, and temperature.
The temperature of the air is "14.24 °C".
Temperature of AirFirst, we find the speed of sound at the given temperature:
v = fλ
where,
v = speed of sound = ?f = frequency = 695 Hzλ = wavelength = 0.49 mTherefore,
v = (695 Hz)(0.49 m)
v = 340.55 m/s
Now, the relationship between the speed of sound and temperature can be given by the following formula:
[tex]\frac{v}{v_o} = \sqrt{\frac{T}{273\ k}}\\\\T = (273\ k)(\frac{v}{v_o})^2\\\\[/tex]
where,
T = Temperature = ?v = speed of sound in air at given temperature = 340.55 m/sv₀ = speed of sound in air at 0°C = 332 m/sTherefore,
[tex]T = (273\ k)(\frac{340.55\ m/s}{332\ m/s})^2[/tex]
T = 287.24 k = (278.24 k -273) °C
T = 14.24 °C
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How is an image created by an X-ray machine? A. High-energy electromagnetic waves are either absorbed by or reflected by body tissue. B. Low-energy electromagnetic waves are either reflected by or transmitted through body tissue. C. Low-energy electromagnetic waves are either absorbed by or transmitted through body tissue. D. High-energy electromagnetic waves are either absorbed by or transmitted through body tissue.
Answer: C Low energy electromagnetic waves are either reflecting by or transmitted through body tissue.
Explanation:
At 40 degrees is 25g of NaNO3 saturated or unsaturated?
I think unsaturated
because -
At 55°C, a saturated solution would contain 120 g of solute, NaNO3. (Notice, this point is exactly on the solute's curve). If, for example we mixed in 140 g of NaNO3 instead of 110 g of solute at 55°C, we would create a SUPER saturated solution, because we would be at a point ABOVE the solute's solubility curve.
Based on fossil evidence, about how long ago did the
first single-celled life form appear on Earth?O 130 million years ago
O 1.5 billion years ago
O
2.5 billion years ago
O
4.1 billion years ago
Answer:
4.1 billion
Explanation:
Please help!
Which resources are renewable resources?
Select all correct answers.
1. natural gas
2. solar
3. coal
4. hydroelectric
5. biomass
Answer: The answers are Biomass, Solar, and Hydroelectric! :)
Explanation:
Why do we need to convert mass to moles in stoichiometry problems.
Caleb does the following:
i. walks 4 m, south
ii. walks 8 m, east
iii. walks 4 m, north
iv. walks 8 m, west.
Her overall displacement is .....?
How does an insulator stop the flow of an electric current? Question 9 options: Electrons in an insulator do not move readily. Insulators convert electric energy to other forms of energy. Insulators have too many electrons. Insulators have a positive charge so they absorb electrons.
Insulators are often defined as materials that do not allow electricity to flow through them. Option A is correct. Electrons in an insulator do not move readily.
What is an insulator?Insulators are commonly employed in physics. Insulators are often defined as materials that do not allow electricity to flow through them.
Insulators are also referred to as poor electrical conductors. We may discover various instances of these insulators in our daily lives. Insulators include materials such as paper, glass, rubber, and plastic.
Insulators are often defined as materials that do not allow electricity to flow through them. Electrons in an insulator do not move readily
Hence option A is correct. Electrons in an insulator do not move readily
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help me with this pls
Answer:
8000J,100J,20
Explanation:
Wi =E×SE =400N × 20cm =8000J
Wo=L×SL=20N×5.0 m=100J
MA =L/E =400N/20N =20
A baseball player uses a bat to hit a 0.145-kilogram stationary baseball with a force of 18,436 newtons. What is the force, in newtons, on the player's bat?
Answer:
18,436 newtons
Explanation:
hope it helps you
The right back player hits the ball over the net to start play. EIVERCS
___ ___ ___ ___ ___ ___ ___
2. The score is 15-15. EDECU
___ ___ ___ ___ ___
3. Stopping the game for a rest period. MIET TOU
___ ___ ___ ___ ___ ___ ___
4. The serving team fails to score. ODISTEU
___ ___ ___ ___ ___ ___ ___
5. Two out of three games. TCAMH
___ ___ ___ ___ ___
6. A high pass near the net for a player to spike it. ETS
___ ___ ___
7. A hard driven ball from above the net. PKEIS
___ ___ ___ ___ ___
8. Service lands in the opponent’s court without being touched. CAE
___ ___ ___
9. Clockwise movement of players following a side-out. OINTOTAR
___ ___ ___ ___ ___ ___ ___ ___
10. Scoring when a point is awarded on every serve regardless of which team is serving. ALYRL
The right back player hits the ball over the net to start play. EIVERCS
(((service)))
2. The score is 15-15. EDECU
(((deuce)))
3. Stopping the game for a rest period. MIET TOU
(((time out)))
4. The serving team fails to score. ODISTEU
(((outside)))
5. Two out of three games. TCAMH
(((match)))
6. A high pass near the net for a player to spike it. ETS
(((set)))
7. A hard driven ball from above the net. PKEIS
(((spike)))
8. Service lands in the opponent’s court without being touched. CAE
(((ace)))
9. Clockwise movement of players following a side-out. OINTOTAR
(((rotation)))
10. Scoring when a point is awarded on every serve regardless of which team is serving. ALYRL
(((rally)))
The right back player hits the ball over the net to start play. - SERVE
S E R V E _ _ _
The score is 15-15. - DEUCE
D E U C E _
Stopping the game for a rest period. - TIME OUT
T I M E _ O U T
The serving team fails to score. - SIDEOUT
S I D E O U T _
Two out of three games. - MATCH
M A T C H _
A high pass near the net for a player to spike it. - SET
S E T _
A hard driven ball from above the net. - SPIKE
S P I K E _ _
Service lands in the opponent’s court without being touched. - ACE
A C E _
Clockwise movement of players following a side-out. - ROTATION
R O T A T I O N _
Scoring when a point is awarded on every serve regardless of which team is serving. - RALLY
What is game ?A game is a systematic kind of play that is often done for enjoyment or amusement, however it may also be used as a teaching tool. A lot of games are also regarded as works of art. Sometimes people play games only for fun, while other times they play for recognition or reward.
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What would a wave with a low amplitude sound like? Question 3 options: It would sound quiet. It would sound loud. It would sound squeaky. It would sound deep
Answer:
it would be loud
Explanation:
it would be loud
i need help with this
A 60w bulb has a higher resistance than a 100w bulb, since the power rating is given assuming that the bulb is connected to a 120v source by itself. If you connect a 60w bulb and a 100w bulb in series to an outlet, which will shine brighter?.
Voltage drop across any components in series is proportional to its resistance. 60W bulb has higher resistance than 100W bulb if both the bulbs were rated for same voltage. So higher voltage drop will be across a 60W bulb.
In parallel voltage drops will be same across both the bulbs but current through it will be inversely proportional to the resistance. So 100W bulb draws more current than 60W bulbs.
60W dissipates more energy than 100W bulbs when in series and 100W bulbs dissipates more energy when in parallel.
Water flowing from a waterfall before it hits the pond below?
Answer:
Kinetic Energy
Explanation:
Ang prinsipyo ay nagsasaad na ang enerhiya ay hindi maaaring malikha o masira, ngunit maaari lamang ma-convert mula sa isang anyo patungo sa isa pa. Ang tubig sa tuktok ng napakataas na talon ay nagtataglay ng gravitational potential energy. Habang bumabagsak ang tubig, ang enerhiya na ito ay na-convert sa kinetic energy, na nagreresulta sa isang daloy sa isang mataas na bilis.
Consider a resistor (R=1000 kΩ) and a capacitor (C=1μF) connected in series. This configuration is connected in series to a battery with an emf of 10 V.
After the capacitor is charged to its maximum value, the capacitor and resistor are disconnected from the battery and from each other. Then they are connected in parallel, so that the capacitor discharges through the resistor. How long will it take for the voltage across the capacitor to drop to 2.50 V?
Answer:
The maximum pressure is 10 V from across condenser.The highest charge mostly on condenser.
Vc = 10 x 1mf
= 10 ^ - 5C
The time it takes for the condenser to be 5 V different.
Thus we have, 0.69 x 10 ^ - 3 seconds.