Answers
It may also be constant between 10 and 40 seconds. It's hard to tell ... someone has scratched all over the graph.
On a position/time graph, any STRAIGHT line represents constant speed.
Related Questions
How does average speed relate to the distance covered and the time taken for travel?
Answers
By determining average speed, you can assume that your speed is constant and multiply it with the traveling time to know the distance covered.
Final answer:
Average speed is determined by dividing the distance traveled by the time of travel.
Explanation:
Average speed is calculated by dividing the distance traveled by the time of travel. It is a scalar quantity and does not have a direction associated with it.
The higher the density the heavier it is
Answers
An object goes from a speed of 9 m/s to a total stop in 3s what is the object acceleration
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acceleration = change in speed / total time
then
acceleratiom = (0m/s - 9 m/s ) / 3s
therefore
acceleration = -3m/s^2
One sphere has a radius of 5.10 cm; another has a radius of 5.00 cm. What is the difference in volume (in cubic centimeters) between two spheres?
Answers
volume of sphere = (4/3) * pi * r^3
for sphere 1:
volume = (4/3)(22/7)(5.1*10^-2)^3
= 5.558*10^-4 m^3
for sphere 2:
volume = (4/3)(22/7)(5*10^-2)^3
= 5.238*10^-4 m^3
it is clear that volume of sphere 1 is greater than volume of sphere 2 with a difference of:
5.558*10^-4 - 5.238*10^-4 = 3.2*10^-5 m^3
Determine the maximum height and range of a projectile fired at a height of 4 feet above the ground with an initial velocity of 600 feet per second and at an angle of 45° above the horizontal. (round your answers to three decimal places.)
Answers
The maximum height is approximately 602.878 feet, and the range is approximately 1,204.755 feet, rounded to three decimal places.
Certainly, let's calculate the maximum height and range of the projectile.
Given:
Initial height (h₀) = 4 feet
Initial velocity (v₀) = 600 ft/s
Launch angle (θ) = 45 degrees
Acceleration due to gravity (g) = 32 ft/s² (assuming downward as positive)
Vertical Motion:
h = h₀ + v₀ sin(θ) t - 1/2 gt²
At the maximum height, v_y = 0:
v_y = v₀ sin(θ) - gt = 0
Solving for t, we get the time of flight. Once we have t, we can substitute it back into the vertical motion equation to find the maximum height (h).
t = v₀ sin(θ) / g
h = h₀ + v₀² sin²(θ) / (2g)
Horizontal Motion:
R = v₀ cos(θ) * time of flight
R = v₀ cos(θ) * v₀ sin(θ) / g
Now, let's perform the calculations:
t = 600 sin(45°) / 32
t ≈ 5.774 seconds
h = 4 + 600² sin²(45°) / (2 * 32)
h ≈ 602.878 feet
R = 600 cos(45°) * 5.774
R ≈ 1,204.755 feet
What is the frequency of a wave that has a speed of 365 m/s and a wavelength of 1.70 m?
Answers
The electric field between two parallel plates has a magnitude of 875 N/C. The positive plate is 0.002 m away from the negative plate. What is the electric potential difference between the plates? 2.3 × 10-6 V 1.8 × 100 V 8.8 × 102 V 4.4 × 104 V
Answers
E = 875 N/C electric field
d = 00.002 m, distance between parallel plates
Note that
1 V = 1 J/C
The electric potential difference is
[tex]V=E*d \\\\ =(875 \, \frac{N}{C})*(0.002 \, m) \\\\ = 1.75 \, \frac{J}{C} \\\\ =1.75 \, V[/tex]
Answer: 1.8 V (nearest tenth)
Answer : Electric potential, [tex]V=1.8\times 10^0\ V[/tex]
Explanation :
It is given that,
Magnitude of electric field, [tex]E=875\ N/C[/tex]
Distance between two plates, [tex]d=0.002\ m[/tex]
The relation between the electric field and the electric potential is given by :
[tex]E=\dfrac{V}{d}[/tex]
[tex]V=E\times d[/tex]
[tex]V= 875\ N/C\times 0.002\ m[/tex]
[tex]V=1.75\ V[/tex]
or
[tex]V=1.8\times 10^0\ V[/tex]
So, the magnitude of electric potential is given by option (2).
Hence, this is the required solution.
What statement BEST describes a solid?
a. Solids have definite shape and variable volume.
b. Solids have variable shape and variable volume.
c. Solids have a definite shape and definite volume.
d. Solids have a variable shape and definite volume.
Answers
is the correct one.
The correct answer is C. Solids have a definite shape and definite volume
Explanation:
There are four main forms or states in which matter can exist, this includes liquid, gas, solid and plasma and each of this varies according to shape, volume, and other features. In the case of solids, this occurs when particles in the matter are close to each other and remain statics, which creates a defined shape with a definite volume, different to liquids that have a definite volume but not a definite shape or to gases that vary in volume and shape. Considering this, the statement that best describes a solid is "Solids have a definite shape and definite volume".
The droplets on a glass of ice water are a result of water vapor releasing energy and changing to water droplets.
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In the solid state the molecules of water have the lowest energy content.
To pass from solid state to liquid stated water needs to gain some energy to increase vibration and motion of the molecules and reach a higher energy states.
To pass from liquid state to vapor (gaseous state) the molecules of water have to gain more energy to increase more the motion of the molecules and reach a more energetic stated.
Then you can think that when the water vapor becomes liquid (droplets) it needs to release some energy.
The droplets formed on a glass of ice water is an example of water condensation, one of the processes of the water cycle.
The droplets on the external surface of a cold glass are the result of condensation of water.
Condensation is the pass from vapor state to liquid state. As whe have stated, when water passes from vapor state to liquid state it has to release energy because liquid state is lower in energy than vapor (the molecules in water experiment slower motion than molecules of vapor).
the answer is condensation
Your town has decided to build a new power plant to replace the old coal burning plant. Suggest a renewable resource that they could use to generate power. Describe two advantages and two disadvantages of the resource you have recommended.
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dam power plant (not sure if this is considered renewable): benefits: as it creates a tourist spot bringing more money and provides electricity.
disadvantages: restricts flow of water to farms, costs millions to build.
solar power plant: benefits: sunlight just keeps coming, produces a lot of electricity for maybe half the cost.
disadvantages: takes a large crew to maintain, mostly needs to be in an open area.
Wind farm: benefits: wind we don't have to worry about much, just blows through and turns the turbines, and can produce electricity almost 24/7.
disadvantages: unsightly, needs open space and costs a lot to build
Take your pick!
Answer: Wind power plant
Explanation:
A renewable resource is the one which can be replenished due to natural cycle like water, sunlight, forests and wind. The renewable resources are abundantly available in nature.
A old coal burning plant can be replaced by the wind power plant. This is because of the fact that wind power can produce comparably the same amount of electrical energy as that of electrical energy generated by coal burning plant.
The advantages of using the wind power plant.
1. Wind is available at all regions of the world, the wind resource will not deplete in future.
2. Large amount of energy can be produced on a large scale.
The disadvantages of using the wind power plant.
1. Requires a large open space to construct a wind power plant.
2. The energy cannot be harnessed in bad weather conditions such as rainfall.
Approximately how much matter is there in the sun?
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The acceleration produced by a net force on a body is inversely proportional to the mass of the body. true or false
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The acceleration produced by a net force on a body is inversely proportional to the mass of the body is true.
What is acceleration?A net force acting on an object causes it to accelerate, which would be inversely proportional to such mass of the object and therefore directly proportional to the force's size as well as direction.
What is mass?A physical body's mass would be the total amount of matter it contains. Inertia, or the body's susceptibility to acceleration when a net force would be applied, is another property that may be measured.
It is known that F = ma, hence the acceleration produced by a net force on a body is inversely proportional to the mass of the body.
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A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.0° relative to the ground and is caught at the same height as it is released, what is its initial speed relative to the ground
Answers
The initial speed of the football can be determined using the equations from projectile motion, considering the horizontal distance of the throw and the angle at which the ball is thrown.
Explanation:The question is asking to determine the initial speed of the football when thrown by the quarterback. This is a projectile motion question and it involves two dimensions. Given that the quarterback is throwing the ball at an angle of 25.0 degrees and the ball lands at the same height, we can find the initial speed using the horizontal distance of the throw (20.0 m) and the equation for horizontal displacement in projectile motion: x = V0 * t * cos(θ).
Here, we do not have the throwing time (t), and hence, we use another equation from projectile motion where time (t) = [2 * V0 * sin(θ)] / g; where g is the gravity. Substituting this time (t) in the first equation, and solving for V0, we will get the initial speed of the thrown football.
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When a certain element is excited with electricity, we see three main lines in its emission spectrum: two red lines and one orange line. what would the absorption spectrum of this element look like?
Answers
Write a hypothesis about the effect of increasing the total mass of the carts on the final velocity after an inelastic collision. Use the "if . . . then . . . because . . ." format and be sure to answer the lesson question: "How does changing mass affect colliding objects?"
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The hypothesis about the effect of increasing the total mass of the carts on the final velocity after an inelastic collision will be as follows;
"If the total mass of two colliding carts is increased then the final velocity of the carts drops, because mass and velocity define momentum and momentum is preserved during an inelastic collision".
Explanation:
In an inelastic collision, the two objects stick on each other and move with a common velocity.
If m₁ and m₂ are the mass of two objects. They are moving with initial velocities u₁ and u₂. Let V be the final velocity of both objects.
Using conservation of momentum as :
[tex]m_1u_1+m_2u_2=(m_1+m_2)V[/tex]
[tex]V=\dfrac{m_1u_1+m_2u_2}{m_1+m_2}[/tex]
If the mass of the colliding objects increases then the velocity decreases because there is an inverse relationship between the mass and the velocity.
what is the shortest possible time in which a bacterium could travel a distence of 8.4 cm across a petri dish at a constant speed of 3.5mm
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D is 8.4 cm or 84mm, R is 3.5mm (units of time, assuming seconds for now)
84 = 3.5T
T = 24 seconds
How do two negatively charged particles behave when held close together and then released?
Answers
Answer: Move away.
Explanation:
We know that like charges repel each other and unlike charges attract each other. So, when two negatively charged particles are brought close together and then released, they move away from each other because of their similar charge and hence, they repel each other. The electrostatic force of repulsion acts between the two similar charged particles.
An electron travels 1.64 m in 4.32 × 10−8 s. How fast is it traveling? Answer in units of m/s
Answers
= 3.796 x 10^7 m/s.
Speedy little fella. That's almost 13% of the speed of light.
what is the best way to avoid overloading your boat
Answers
The best way to avoid overloading your boat is to ensure that the total weight does not exceed the recommended capacity. Distribute the weight evenly and keep the center of gravity low. Follow safe boating practices and prioritize everyone's safety.
Explanation:The best way to avoid overloading your boat is to ensure that the total weight of the boat, including passengers and cargo, does not exceed the maximum recommended weight capacity. This can be determined by checking the boat's capacity plate or consulting the manufacturer's specifications. It is also important to distribute the weight evenly throughout the boat, keeping the center of gravity low to maintain stability. Finally, always follow safe boating practices and avoid overloading your boat to prevent accidents and ensure everyone's safety.
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Hospital x-ray generators emit x-rays with wavelength of about 15.0 nanometers (nm), where 1nm=10−9m. what is the energy of a photon of the x-rays?
Answers
We have that the energy of a photon of the x-rays is
[tex]E=1.3*10^{-17}J[/tex]
From the Question we are told that
Wavelength [tex]l=15.0 nm[/tex]
Generally the equation for energy of a photon is mathematically given as
[tex]E=\frac{hc}{\lambda}[/tex]
Where
[tex]h= 6.626*10^-{34}\\\\c=3.00*10^7m.s[/tex]
Therefore
[tex]E=\frac{(6.626*10^-{34})(3.00*10^7)}{15*10^{-9}}[/tex]
[tex]E=1.3*10^{-17}J[/tex]
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when the television is working, 1200 joules of energy are supplied to the television every second, the useful energy transferred by the television is 720 joules every second. Calculate the efficiency of the television. Show clearly how you work out your answer.
Answers
Efficiency is the ratio of useful output to total input in energy conversion. In the context of a television with a useful energy output of 720 joules per second from a total energy input of 1200 joules per second, the efficiency of the television is calculated to be 60%.
Explanation:The efficiency of a system, such as a television, can be calculated using the formula, Efficiency = (Useful Energy Output / Total Energy Input) x 100%. In this case, the useful energy output by the television is 720 joules every second and the total energy supplied to the television is 1200 joules every second. So, to calculate the efficiency you would do:
First, divide the useful energy output by the total energy input. It would be 720J / 1200J which equals 0.6. Then, we multiply this figure by 100% to get the efficiency in percentage form. 0.6 x 100% equals 60%.
Therefore, the efficiency of the television is 60%.
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A ball is dropped from a cliff and has an acceleration of 9.8 m/s^2 how long will it take the ball to reach a speed of 24.5 m/s
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Answer:
Acceleration of ball (a) = 9.8 m/s^2 Speed (v) = 24.5 m/s Time (t) = Acceleration / Time = v / a = 24.5/9.8 = 2.5 s So it will take 2.5 seconds to reach that speed.
Explanation:
what are flask used for primarily in the lab
Answers
Flasks in a high school chemistry lab are primarily used for containing and mixing chemical solutions. Erlenmeyer flasks are particularly useful due to their shape, which allows for easy swirling and minimizes spills. Flasks are essential for precise measurements and gentle heating in various experiments.
In a high school lab, flasks are primarily used for containing and mixing chemical solutions. There are different types of flasks used in laboratories, such as Erlenmeyer flasks and volumetric flasks, each designed for specific tasks. Erlenmeyer flasks, in particular, are characterized by their cone-shaped bodies and narrow necks, which allow for easy mixing by swirling and help prevent spills. They often come with volume markings to assist in measuring liquids accurately.
Flasks are versatile and essential for various experiments. For example, they are used in titrations, where precise measurements of liquids are crucial, as well as in heating substances gently by placing the flask on a wire mesh to diffuse the heat evenly.
Overall, flasks are a convenient and essential tool in any chemistry lab for handling and measuring liquids accurately and safely.
When I bump the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction.
1st
2nd
3rd
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Answer: A) or the first option.
Answer:
Newton's 1st law explains this reaction
Explanation:
Newton's first law of motion, states that " a body at rest or uniform motion in a straight line, will continue in that state, unless acted upon by an external force.
The coffee in the cup, initially rest on the table, but the moment you bump the table, you act as an external force which distort the initial state of the coffee, making it to spill out.
Therefore, Newton's 1st law explains this reaction.
What type of energy is present in a barbell being lifted or a shot-put being thrown?
a.
mechanical energy
b.
thermal energy
c.
chemical energy
d.
electrical energy.
Answers
I would say C chemical energy but its not changing so let's go with thermal energy.
Your answer will be B thermal energy.
Answer:
A) Mechanical energy
Explanation:
I got it right on Edge 2022
a construction worker ascending at 6m/s in an open elevator 42 m above the ground drops a hammer.
A. How long does it take the hammer to hit the ground?
B. How fast is it moving when it hits the ground?
Answers
1.) Time for it to rise with the elevator to its highest peak:
Hmax = v²/2g = (6 m/s)²/2(9.81 m/s²) = 1.835 m
Time to reach 1.835 m = 1.835 m * 1 s/6 m = 0.306 s
Time for the free fall from the highest peak to the floor:
t = √2y/g, where y is the total height
y = 1.835 m + 42 m = 43.835 m
So,
t = √2(43.835 m )/(9.81 m/s²) = 2.989 s
Therefore, the total time is 0.306 s + 2.989 s = 3.3 seconds
2.) Velocity of impact of a free-falling body is:
v = √2gy
v = √2(9.81 m/s²)(43.835 m)
v = 29.33 m/s
The hammer takes approximately 3.36 seconds to hit the ground from a height of 42m. With an initial upward velocity of 6m/s and the acceleration due to the Earth's gravity, the hammer hits the ground at a speed of approximately 39.1m/s.
Explanation:The subject of this question is Physics, specifically dealing with the laws of motion and gravity. When the construction worker drops the hammer from an ascending elevator, the initial velocity of the hammer is the same as the speed of the elevator, which is 6m/s. However, as the hammer falls, it accelerates under gravity (taking 9.8m/s² as the acceleration due to gravity).
A. To find out how long it takes for the hammer to hit the ground, we need to solve for time (t) using the equation of motion: h = ut + 0.5gt², where h is the height (42m), u is the initial velocity (6m/s), and g is the acceleration due to gravity (9.8m/s²). Solving this equation yields a time of approximately 3.36 seconds.
B. To find out how fast the hammer is moving when it hits the ground, we use the equation v = u + gt, where v is the final velocity, u is the initial velocity (6m/s), g is the acceleration due to gravity (9.8m/s²), and t is the time taken which we calculated previously as 3.36 seconds. Solving the equation yields the speed as approximately 39.1m/s when the hammer hits the ground.
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What factors affect the speed of a wave? Check all that apply.
Answers
It is the last 3.
the temperature of the medium
the type of wave
the type of medium
The force that pulls an object outward from the center of a curve is
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Explanation:
Refer to the figure below.
The centripetal acceleration of the object is
a = v²/r, directed toward the center of the circular path.
where
v = the tangential velocity
r = radius of the circular path
The centripetal force is
F = (mv²)/r
The apparent force that seems to pull an object outward from the center of a curve is known as centrifugal force, which is actually the result of inertia in a rotating frame. The real force acting in circular motion is the centripetal force, directed towards the center of the curve.
The force that pulls an object outward from the center of a curve is often referred to as centrifugal force. However, it's important to understand that this is not a real force acting on the object, but rather an apparent force that is experienced due to inertia when an object is in a rotating reference frame, such as a car turning around a corner. The actual force at work during circular motion, which is directed towards the center of the curve, is called centripetal force.
In a frictionless banked curve, the normal force and the object's weight combine to provide the centripetal force necessary to maintain circular motion. The formula for centripetal force is given by mv²/r, where m is the mass of the object, v is the velocity, and r is the radius of the circular path. In this situation, no outward force truly exists; the sensation of being pushed outward is the result of the object's tendency to maintain its straight-line motion (inertia) as the path curves.
A source charge of 3 µC generates an electric field of 2.86 × 105 N/C at the location of a test charge. Using k = 8.99 × 109N.m^2/c^2, what is the distance, to the
Answers
Source charge, Q = 3 micro C = 3 * 10^ - 6 C
E = electric field = 2.86 * 10 ^5 N/C
K = 8.99 * 10^9 N * m^2 / C
d = distance = ?
Formula:
E = K * Q / (d^2) => d^2 = K * Q / E
=> d^2 = 8.99 * 10^9 N * m^2 / C * 3 * 10^ -6 C / (2.86 * 10^ 5 N/C)
d^2 = 9.43 * 10 ^ -2 m^2
=> d = 3.07 * 10^-1 m
Answer: 0.307 m
Note: it is a long distance due to the Electric field is very low
0.31 for E2020 users
Convert 3.8 Km/sec to miles/year
Answers
Hope this helped
Pl ease give brainliest
To convert 3.8 km/sec to miles/year, multiply by the conversion factors: 3600 km/hour and 0.621 miles/km.
Explanation:To convert 3.8 km/sec to miles/year, we need to first convert km/sec to km/hour, and then convert km/hour to miles/year.
1 km/sec is equal to 3600 km/hour (since there are 3600 seconds in an hour). So, 3.8 km/sec is equal to 3.8 x 3600 = 13,680 km/hour.
Now, to convert km/hour to miles/year, we can use the conversion factor of 0.621 miles/km. Therefore, 13,680 km/hour can be converted to miles/year by multiplying it by the conversion factor:
13,680 km/hour x 0.621 miles/km = 8,498.68 miles/year.
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