Answers
The average acceleration from 9 to 18 seconds is 6 meters per second.
The graph shows that from 9 to 18 seconds the speed of the ostrich stays at a steady 6 meters per second.
Related Questions
A bicycle travels 22 km in 0.50 hr. What is its average speed?
Answers
Answer:
22/0.50=44
Explanation:
average speed= distance / time
if the work done by a battery to move a unit charge through the battery from one terminal to the other is doubled, what is the effect on the battery's emf?
Answers
The emf is doubled
The change in electric potential energy of a charge is equal to the work done by a battery to carry a unit charge across the battery from one terminal to the other, hence it may be expressed as
w=qΔV
where
The charge is q.
ΔV is the difference in potential that the charge has traveled through.
The potential difference is equal to the battery's emf because the charge is flowing through the battery e, which means.
W=qe (1)
We are informed in this issue that the battery's output has increased, so
w'=2W
We can see from eq. (1) that the battery's emf is proportional to the work performed; as a result, when the work doubles, so does the battery's emf.
What is potential difference?
The difference in charge carriers energy between two places in a circuit is known as the potential difference.
To know more about potential difference visit
https://brainly.com/question/21808222
#SPJ4
A 0.145 kg rock is thrown with a speed of 32.0 m/s at an angle of 400. what is its kinetic energy at the top of its trajectory?
Answers
The kinetic energy at the top of the rock trajectory is 43.57 Joules
The kinetic energy formula and the procedure we will use is:
K.E. = 1/2 m (v*cosθ)²
Where:
v = speedm = massθ = angle Joules = Kg m²*s²Information of the problem:
v = 32 m/sm = 0.145 Kgθ = 40°Applying kinetic energy formula we get:
K.E. = 1/2 m (v*cosθ)²
K.E. = 1/2 * 0.145 kg (32 m/s*cos40°)²
K.E. = 1/2 * 0.145 kg *(24.513 m/s)²
K.E. = 1/2 * 0.145 kg *600.91 m²/s²
K.E. = 87.132 kg m²/s² / 2
K.E. = 43.57 Joules
What is kinetic energy?It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
Learn more about kinetic energy at brainly.com/question/114210
#SPJ4
and electric motor lifts an elevator a vertical distance of 18.0m in a time of 30.0s by exerting an upward force of 6.0x10^3 N . what power does the electric motor produce?
Answers
Answer:
\(\fbox {3.6kW}\)
Explanation:
Formula used :
\(\boxed {P = F \times v} \leftarrow \rightarrow \boxed {P = \frac{F \times S}{t}}\)
Given :
⇒ F = 6 × 10³ N
⇒ S = 18 m
⇒ t = 30 s
Solving :
⇒ P = 6 × 10³ × 18 / 30
⇒ P = 2 × 100 × 18
⇒ P = 3600 W
⇒ P = 3.6kW
45. What is the wovelength of a 30. Hertz periodic
wave moving ol 60. meters per second?
a. 0.50m
c. m
b 20m
d 1800 m
Answers
The wavelength is 2m.
Hence, Option c) 2m is the correct answer
Given that;
Frequency; \(f = 30Hz\)
Speed; \(v = 60m/s\)
Wavelength; \(\lambda =\ ?\)
using the expression for the relations between wavelength, frequency and speed of wave:
\(\lambda = \frac{v}{f}\)
Where \(\lambda\) is wavelength, f is frequency and v is speed.
We substitute our given values into the equation
\(\lambda = \frac{60m/s}{30Hz}\\\\\lambda = \frac{60m/s}{30s^{-1}}\\\\\lambda = 2m\)
The wavelength is 2m.
Hence, Option c) 2m is the correct answer.
To learn more about wavelength, click here: https://brainly.com/question/1347107
The frequency of the moving wave is 30 Hz and if it is moving at the speed of 60 m/s then the wavelength will be equal to 2 m.
What is Wavelength?The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm).
The wavelength is more frequently described in nanometers (nm), which are units of 10⁻⁹ m, or angstroms, which are units of 10⁻¹⁰ m, for infrared (IR), visible light (UV), and gamma radiation.
As per the provided given data in the question,
Frequency, f = 30 Hz
Speed, v = 60 m/s
Then, the wavelength of the moving wave will be,
λ = v/f
= 60/30
λ = 2 meters.
Therefore, the wavelength will be 2 meters.
To know more about Wavelength:
https://brainly.com/question/13533093
#SPJ2
Question 3. (Epidemiology) Choose the best answer below:
A study of weight gain and incident diabetes was conducted among 2,920 study subjects. Subjects were weighed at the start and end of the study,and were categorized as Gained Weight (exposed) and Did Not Gain Weight (unexposed). It was later discovered that the scale used to weigh the subjects at the end of the study was not calibrated properly and the end weight for all subjects was incorrect. Which of the following is likely in this scenario?
Misclassification
Loss of external validity
Surveillance bias
Selection bias
Answers
In this scenario, the likely issue is misclassification. The incorrect calibration of the scale used to weigh the subjects at the end of the study resulted in inaccurate measurements of weight gain.
This misclassification could lead to erroneous categorization of subjects as either "Gained Weight" or "Did Not Gain Weight," affecting the study's validity.
Misclassification refers to the erroneous categorization or assignment of individuals or variables in a study. In this case, the incorrect calibration of the weighing scale resulted in inaccurate measurements of weight gain for all subjects.
This means that the subjects' true weight gain status was misclassified, leading to potential errors in the exposure (Gained Weight) and unexposed (Did Not Gain Weight) groups.
The misclassification of subjects can introduce bias and affect the study's validity and reliability. It may result in incorrect estimates of the association between weight gain and incident diabetes.
The misclassification could potentially dilute or mask the true relationship between the exposure (weight gain) and the outcome (incident diabetes) if the misclassification is non-differential, meaning it affects both exposed and unexposed groups equally.
To mitigate the impact of misclassification, researchers can attempt to recalibrate the scale and reanalyze the data. Alternatively, they may need to exclude or reclassify the subjects whose weight measurements were affected by the scale calibration issue. Careful consideration and adjustments should be made to ensure the accuracy and validity of the study findings.
To learn more about calibration click here brainly.com/question/28325954
#SPJ11
If a lawn mower is pushed with a distance of 30 meters and 12N-m of work is exerted, calculate the force.
Answers
Answer:
Explanation:
W = FΔx so filling in:
12 = F(30) so
F = .4N
ASAP PLS
A wave traveling on a string has a wavelength of 4.30 m and a frequency of 70.0 Hz. What is the speed of the wave?
74.3 m/s
655 m/s
301 m/s
465 m/s
Answers
Answer:
310 m/s
Explanation:
Formula:
Wavelength =Speed/Frequency
Speed = 4.30 x 70 = 310 m/s
When walking barefoot, Kevin can walk across the grass easily, but when he crosses the paved street, the street is hot and burns his feet. At the beach he walks quickly across the hot sand to the cool water. Why do some substances feel hot to his feet and others do not? Radiation is heat transfer through waves. Specific heat is the amount of energy required to raise the temperature of a substance 1 degree C.
Answers
What do menarche and spermarche have to do with physical development?
Answers
What is the equivalent resistance of a circuit that contains four 75.0 resistors connected in parallel with a 100.0 V battery?
Answers
Answer:
18.75 ohms.
Explanation:
From the question,
]When four resistors are connected in parallel in a circuit,
The equilvalent resistor is given as
1/R' = 1/R₁+1/R₂+1/R₃+1/R₄............................Equation 1
Where R' = Equivalent resistor.
Given: R₁ = R₂ = R₃ = R₄ = 75.0 ohms.
Substitute these values into equation 1
1/R' = (1/75)+(1/75)+(1/75)+(1/75)
1/R' = 4/75
R' = 75/4
R' = 18.75 ohms.
Hence the equivalent resistance = 18.75 ohms.
Answer:
18.8 ohms
Explanation:
apax
the back wall of an auditorium is 25.0 m from the stage. part a if you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall? the speed of sound in the air is 343 m/s .
Answers
The difference of time between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall would be 0.036s.
What does a sound wave echoe mean?An echo is a reflection of sound that comes to the audience with a delay after the direct sound in audio signal processing and acoustics. The delay is directly proportionate to the separation between the source and the listener of the reflecting surface. One the kind audio effect that involves significantly delaying a signal is an echo effect. In this instance, after some period of time, listeners hear the same signal repeated clearly. When there is a noticeable delay in the sound, listeners can differentiate individual echoes.
The person seated in the middle row:
The distance sound traveled to middle row => 25/2 = 12.5m
The total distance the sound traveled to full length of auditorium and to the middle row => 25+12.5 => 37.5m
t1 => d1/v => 12.5/343 => 0.036s
t2 => d2/v => 25/343 => 0.072s
t2-t1 => 0.036s
Learn more about sound here:
brainly.com/question/8768506
#SPJ4
A certain simple pendulum has a period on earth of 1.60 s. what is its period on the surface of Mars , where the acceleration due to gravity is 3.71 m/s2?
Answers
On the surface of Mars, the period of the simple pendulum is approximately 2.27 seconds.
The period of a simple pendulum is given by the formula T = 2π√(L/g), where T represents the period, L is the length of the pendulum, and g is the acceleration due to gravity.
To find the period on the surface of Mars, we need to calculate the length of the pendulum using the given values of T and g for Mars. Rearranging the formula, we have L = (\(T^2\) * g) / (4\(\pi ^2\)).
Substituting the values into the equation, L = (1.\(60^2\)* 3.71) / (4\(\pi ^2\)). Evaluating this expression, we find L ≈ 0.532 m (rounded to three decimal places).
Using this length and the acceleration due to gravity on Mars (g = 3.71 \(m/s^2\)), we can calculate the period on Mars using the original formula. T = 2π√(0.532/3.71). After performing the calculation, we find that the period on the surface of Mars is approximately 2.27 s (rounded to two decimal places).
For more such questions on surface, click on:
#SPJ11
what must a uranium-235 nucleus absorb before fission will happen
Answers
Answer:
The arrangement of particles within uranium-235 is somewhat unstable and the nucleus can disintegrate if it is excited by an outside source. When a U-235 nucleus absorbs an extra neutron, it quickly breaks into two parts. This process is known as fission
Answer:
a nuetron
Explanation:
In a nuclear reactor , a neutron is absorbed into a nucleus (typically uranium-235). ... The fast moving neutrons carry most of the energy from the reaction with them (99%) but before the neutrons can collide with fresh uranium nuclei, they need to be slowed down
A child looks at his reflection in a spherical Christmas tree ornament 8.0 cm in diameter in season that the image of his face is reduced by 1/2 how far is his face from the ornament
Answers
From the information given,
diameter of ornament = 8
radius = diameter/2 = 8/2
radius of curvature, r = 4
Recall,
focal length, f = radius of curvature/2 = 4/2
f = 2
Recall,
magnification = image d
The condenser transfers energy from the coolant to the air in the building.
When the total energy input to the heat pump system is 1560 kJ the temperature of the air
in the building increases from 11.6 °C to 22.1 °C.
The efficiency of the heat pump system is 87.5%.
The mass of the air inside the building is 125 kg.
Calculate the specific heat capacity of the air in the building.
Give your answer in standard form.
Answers
Answer:
Approximately \(1.04 \; {\rm J \cdot g^{-1} \cdot K^{-1}}\).
Explanation:
Multiply energy input by efficiency to find the useful energy output:
\(\begin{aligned}& (\text{useful out}\text{put}) \\ &= (\text{efficiency})\, (\text{energy in}\text{put}) \\ &= (87.5\%)\, (1560\; {\rm kJ}) \\&= (0.875)\, (1560\; {\rm kJ}) \\ &= 1365\; {\rm kJ}\end{aligned}\).
In other words, \(1365\; {\rm kJ}\) of energy was supplied to the air in the building.
The standard unit of energy is Joules (\({\rm J}\).) Apply unit conversion:
\(\begin{aligned}(1365\; {\rm kJ})\, \left(\frac{10000\; {\rm J}}{1\; {\rm kJ}}\right) = 1.365\times 10^{6}\; {\rm J}\end{aligned}\).
Let \(c\) denote the specific heat capacity of the air in this building. Let \(m\) denote the mass of the air.
Let \(Q\) denote the energy supplied to the air. Let \(\Delta T\) denote the change in temperature. The equation \(Q = c\, m\, \Delta T\) relates these quantities.
In this question, the change in the temperature of the air in this building is:
\(\Delta T = (22.1\; {\rm ^{\circ} C}) - (11.6\; {\rm ^{\circ} C}) = 10.5\; {\rm K}\).
Rearrange the equation \(Q = c\, m\, \Delta T\) to find specific heat capacity \(c\):
\(\begin{aligned}c &= \frac{Q}{m\, \Delta T} \\ &= \frac{1.365 \times 10^{6}\; {\rm J}}{(125\; {\rm kg})\, (10.5\; {\rm K})} \\ &\approx 1.04 \times 10^{3}\; {\rm J \cdot kg^{-1} \cdot K^{-1}}\end{aligned}\).
as more and more capacitors are connected in series, the equivalent capacitance of the combinationincreases.10)a)sometimes true; it depends on the voltage of the battery to which the combination isconnected.b)never truec)sometimes true; it goes up only if the next capacitor is larger than the average of the existingcombination.d)always true
Answers
The correct answer is b) never true. When capacitors are connected in series, the equivalent capacitance of the combination decreases. This is because the total charge on the combination is equal to the charge on each individual capacitor, but the voltage across the combination is the sum of the voltages across each capacitor.
The formula for capacitance is C = Q/V, so if the charge is the same but the voltage is higher, the capacitance will be lower.
Therefore, as more and more capacitors are connected in series, the equivalent capacitance of the combination decreases.
Here you can learn more about equivalent capacitance
https://brainly.com/question/30905469#
#SPJ11
in order to solve the photoelectric effect, einstein applied quantization to which parameter?
Answers
In order to explain the photoelectric effect, Albert Einstein applied quantization to the energy of photons. He proposed that light is made up of discrete packets of energy called photons, and each photon carries a specific amount of energy.
The photoelectric effect refers to the phenomenon where electrons are emitted from a material when it is exposed to light of a sufficiently high frequency. Albert Einstein provided a groundbreaking explanation for this effect by applying the concept of quantization to the energy of photons. According to Einstein's explanation, light consists of discrete packets of energy called photons. Each photon carries a specific amount of energy directly proportional to the frequency of the light wave. This meant that light energy could not be continuously varied but instead existed in discrete units.
This application of quantization to the energy of photons explained several key observations of the photoelectric effect that classical wave theory couldn't account for. It provided a satisfactory explanation for the immediate emission of electrons upon light exposure, the dependence of the emission on the frequency of light rather than its intensity, and the existence of a threshold frequency below which no emission occurs.
Learn more about photoelectric effect here:
https://brainly.com/question/11472433
#SPJ11
if a rock weighs 75.0 n on earth, what would it weigh at the surface of venus? express your answer in newtons.
Answers
The weight of the rock at the surface of Venus is 66.5 N
What is the weight of the rock at the surface of Venus ?
On earth,
The weight of the rock at the surface of earth = 75 N
The weight of an object on earth's surface is:
W = m g
Here, m = mass of rock
acceleration due to gravity (g) = 10 m/s²
W= mg
m = \(\frac{W}{g}\)
m = \(\frac{75}{10}\)
m = 7.5 kg
On Venus,
mass (m) = 7.5 kg
acceleration due to gravity(g) = 8.87 m/s²
W= mg
= 7.5 * 8.87
=66.5 N
What is acceleration due to gravity?
The acceleration that an object experiences because of gravitational force is referred to as acceleration owing to gravity. The SI equivalent is m/s².It is a vector quantity as it has both magnitude and direction. g stands for the acceleration brought on by gravity. On Earth's surface, g has a standard value of 9.8 m/s² at sea level.To learn more about acceleration due to gravity, refer:
https://brainly.com/question/88039
#SPJ4
Which process is the most scientifically plausible explanation for how the organisms released oxygen into Earth's atmosphere? Group of answer choices
Answers
Answer:
Photosynthesis
Explanation:
Studies about the time period of oxygen accumulation suggests that free oxygen was first produced by prokaryotic and then later by eukaryotic organisms in the ocean. These organisms carried out photosynthesis more efficiently, producing oxygen as a waste product.
The organism mainly responsible for this is known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, oxygen.
A 51 cm diameter wheel accelerates uniformly about its center from 150 rpm to 290 rpm in 4.0 s. (A)Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.1 s after it has started accelerating.
Answers
Radial component of the linear acceleration = 99.47 m/s^2
Explanations:The diameter of the wheel, d = 51 cm
The radius, r = d/2 = 51/2 = 25.5 cm
r = 25.5/100 = 0.255 m
r = 0.255 m
\(\begin{gathered} N_{i\text{ }}=\text{ 150 rpm} \\ w_i=\text{ 150}\times\frac{2\pi}{60} \\ w_i=\text{ }15.71\text{ rad/s} \end{gathered}\)\(\begin{gathered} N_f=\text{ 290 rpm} \\ w_f=\text{ 290}\times\frac{2\pi}{60} \\ w_f=\text{ }30.37\text{ rad/s} \end{gathered}\)\(\begin{gathered} w_f=w_i+\alpha t \\ 30.37=15.71+4\alpha \\ 4\alpha=30.37-15.71 \\ 4\alpha=\text{ }14.66 \\ \alpha=\frac{14.66}{4} \\ \alpha\text{ = }3.67rad/s^2 \end{gathered}\)At t = 1.1, first calculate the new angular velocity
\(\begin{gathered} w=w_1+\alpha t \\ w\text{ = 15.71+3.67(1.1)} \\ w\text{ = 15.71+}4.04 \\ w\text{ = }19.75\text{ rad/s} \end{gathered}\)The radial component of the linear acceleration is given as:
\(\begin{gathered} a_r=w^2r \\ a_r=19.75^2\times0.255 \\ a_r=\text{ }99.47\text{ m/}s^2 \end{gathered}\)A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.
Answers
The potential across the capacitor at t = 1.0 seconds, 5.0 seconds, 20.0 seconds respectively is mathematically given as
t=0.476vt=1.967vV2=4.323vWhat is the potential across the capacitor?Question Parameters:
A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.
at
t = 1.0 seconds5.0 seconds20.0 seconds.Generally, the equation for the Voltage is mathematically given as
v(t)=Vmax=(i-e^{-t/t})
Therefore
For t=1
V=5(i-e^{-1/10})
t=0.476v
For t=5s
V2=5(i-e^{-5/10})
t=1.967
For t=20s
V2=5(i-e^{-20/10})
V2=4.323v
Therefore, the values of voltages at the various times are
t=0.476vt=1.967vV2=4.323vRead more about Voltage
https://brainly.com/question/14883923
Complete Question
A 1.0 μF capacitor is being charged by a 5.0 V battery through a 10 MΩ resistor.
Determine the potential across the capacitor when t = 1.0 seconds, 5.0 seconds, 20.0 seconds.
Help a little kid ~
I need the explanation !
Answers
Answer:
Hey There!
Let's solve...
Refer to attachment
Correct option is A....
I hope it is helpful...Cheers!__________
a uniform meter stick is freely pivoted about the 0.20m mark. if it is allowed to swing in a vertical plane with a small amplitude
Answers
The period of the pendulum is approximately 2.01 seconds.
The period of a simple pendulum is determined by its length and the acceleration due to gravity. In this case, the length of the pendulum is 0.20 meters.
The period (T) of a pendulum can be calculated using the formula:
T = 2π√(L/g)
where L is the length of the pendulum and g is the acceleration due to gravity.
Substituting the given values into the formula:
T = 2π√(0.20/9.8)
Calculating the expression:
T ≈ 2π√(0.0204)
T ≈ 2π(0.143)
T ≈ 0.902π
T ≈ 2.01 seconds
Therefore, the period of the pendulum is approximately 2.01 seconds.
Learn more about pendulum: https://brainly.com/question/26449711
#SPJ11
what does rotation and revolution share??
Answers
Answer:
srry
Explanation:
Starting from rest, two skaters push off against each other on smooth level ice, where friction is negligible. One is a woman and one is a man. The woman moves away with a velocity of 1.9 m/s relative to the ice. The mass of the woman is 46 kg, and the mass of the man is 88 kg. Assuming that the speed of light is 3.0 m/s, so that the relativistic momentum must be used, find the recoil velocity of the man relative to the ice.
Answers
Which of these would have the highest temperature?
ice
water
water vapor
Answers
Answer:
Water vapor
Explanation:
Water Vapor has the highest temperature, due to its being in a gas state, and gases usually have very high temperatures, for example steam when you boil pasta.
Hope this helps you! Have a nice day!
A snowball that will be used to build a snowman is at the top of a only hill. If the
potential energy of the snowball is 520 J and the mass of the snowball is 2.2 kg,
what is the height of the hill?
Answers
Answer:
h = 24.11 m
Explanation:
Given that,
The potential energy of the snowball is 520 J
The mass of the snowball is 2.2 kg
We need to find the height of the hill. The potential energy of an object is given by the formula as follows :
\(E=mgh\)
g is acceleration due to gravity
h is height of the hill
\(h=\dfrac{E}{mg}\\\\h=\dfrac{520}{2.2\times 9.8}\\\\h=24.11\ m\)
So, the height of the hill is 24.11 m.
Using the simulation above, write a paragraph to describe what happens to the positively charged alpha
particles when the positive charges in the atom are concentrated and diffuse. Is there a difference when
you change the distance? Why or why not?|
I
Answers
Answer:
D.) The positively charged alpha particles were deflected more often than expected, which indicated that the gold atoms' positive charges were not evenly distributed throughout each atom.Explanation:
The spark-ignition engine in fig. 1.4 is operating at a mean piston speed of 10 m/s. the measured air flow is 60 g/s. calculate the volumetric efficiency based on atmospheric conditions.
Answers
The spark-ignition engine is operating at a mean piston speed of 10 m/s. the measured air flow is 60 g/s, the volumetric efficiency based on atmospheric conditions is 90.183%.
To calculate the volumetric efficiency based on atmospheric conditions, we can use:
Avg piston speed = 2LN
N = 54.34 rev/sec.
Now,
\(v_s\) = 2.2 x 10⁻³ m₃
r = 8.9
So,
8.9 = \(\dfrac{v_s}{v_c} +1\)
\(\dfrac{v_s}{v_c} =7.9\)
\(v_c\) = 0.278 × 10⁻³ m³
We know that:
\(n_v=1-C+c(r_P)\)
Now, solving for C.
\(C=\dfrac{v_c}{v_c+v_s} \\\\C = 1\div8.9\)
\(r_v\) = 0.278 ÷ 2.2
So,
\(n_v\) = 1 - (1 ÷8.9) + (1 ÷ 8.9) x (0.278 ÷ 2.2)
= 90.183%.
Thus, the volumetric efficiency based on atmospheric conditions is 90.183%.
For more details regarding volumetric efficiency, visit:
https://brainly.com/question/34422826
#SPJ12