Answer:
30.38 is the correct answer
Josh is riding his skateboard down a ramp he kicks off and starts with a speed of 0.5 m/s after 1.5 seconds Josh reaches the bottom of the ramp where his speed is 6.5 m/s at what rate did josh accelerate
Answer:
4m/s2
Explanation:
The rate of change of an object's velocity with respect to time is defined as acceleration. The rate at which Josh accelerated is 4 m/sec².
What is acceleration?The rate of change of an object's velocity with respect to time is defined as acceleration. Vector quantities are accelerations. The orientation of an object's acceleration is determined by the orientation of its net force.
Acceleration = (Final Velocity - Initial Velocity)/ Time taken
Given that Josh kicks off and starts with a speed of 0.5 m/s after 1.5 seconds. Josh reaches the bottom of the ramp where his speed is 6.5 m/s. Therefore, we can write the given quantities as,
Initial Velocity = 0.5 m/sec
Final Velocity = 6.5 m/sec
Time = 1.5 seconds
Now, the rate at which Josh accelerated can be written as,
Acceleration = (Final Velocity - Initial Velocity)/ Time taken
= (6.5 m/sec - 0.5m/sec)/1.5 seconds
= 6.0 m/sec / 1.5sec
= 4 m/sec²
Hence, the rate at which Josh accelerated is 4 m/sec².
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The equation below can be used to find the specific heat capacity of a substance. What is the specific heat capacity if it takes 1000 J of energy to heat 25 g of this substance by 100°C? Give your answer in J/kg°C.
Answer:
0.4j/g
Explanation:
using H = MCQwhere H is heat energy, M is mass of substance, and Q temperature change
1000= 25*C*1001000=25*100*C1000=2500Cdivide both by 25001000/2500=CC = 0.4j/gAnswer:
u837483 hd83v
Explanation:
ueu383hevd8eb2 e eusb2 3udbr easy elements easy when ever ever ekq Asner skate s Jesse issbqks. sis whish
A picture hanging on the wall does not move what Newton's laws of motion is this?
Answer:
Newton's third law of motion
Some ringtones for mobile phones can only be heard by young people. What is the likely frequency of these ringtones?
a. 250 Hz
b. 5,000 Hz
c. 10,000 Hz
d. 17,000 Hz
Answer:
About 250 Hz
Explanation:
People of All ages without a hearing impairment should be able to hear the 8000hz. People under 50 should be able to hear the 12,000hz and people under 40, the 15,000hz. Under 30s should hear the 16,000hz, and the 17,000hz is receivable for those under 24.
Which of the following speeds is greatest? (2.54 cm = 1.00 in.)
O 10 km/h
O 10 m/s
O 10 ft/s
O 10 mi/h
O 10 yd/s
Answer:
Hi, There!
O 10 m/s
O 10 yd/s
------------------------------------------------------------------------------------------------------------------
Have a great day!
When converting all the given speeds to km/h and after comparing them, we have that the greatest is option 2: 10 m/s.
To find which of the given speeds is greatest, we need to convert all the units to km/h so we can compare the values.
Option 1. 10 km/hOption 2. 10 m/s to km/h[tex]v = 10 \frac{m}{s}*\frac{1 km}{1000 m}*\frac{3600 s}{1 h} = 36 km/h[/tex]
Option 3. 10 ft/s to km/h[tex]v = 10 \frac{ft}{s}*\frac{1 km}{3280.8 ft}*\frac{3600 s}{1 h} = 11.0 km/h[/tex]
Option 4. 10 mi/h to km/h[tex]v = 10 \frac{mi}{h}*\frac{1 km}{0.6214 mi} = 16.1 km/h[/tex]
Option 5. 10 yd/s to km/h[tex]v = 10 \frac{yd}{s}*\frac{1 km}{1093.6 yd}*\frac{3600 s}{1 h} = 32.9 km/h[/tex]
Therefore, the greatest speed is option 2: 10 m/s.
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A cabbie is trying to stop when he notices a fare is whistling them over. The
car has 18750 J of energy. If the cab is 2100. kg, how fast was it moving?
[tex]\boxed{\sf K.E=\dfrac{1}{2}mv^2}[/tex]
[tex]\\ \sf\longmapsto 18750=\dfrac{1}{2}2100v^2[/tex]
[tex]\\ \sf\longmapsto 18750=1050v^2[/tex]
[tex]\\ \sf\longmapsto v^2=\dfrac{18750}{1050}[/tex]
[tex]\\ \sf\longmapsto v^2=17.85m^2[/tex]
[tex]\\ \sf\longmapsto v=\sqrt{17.85}[/tex]
[tex]\\ \sf\longmapsto v=4.1m/s[/tex]
Alguien que sepa de electromecánica porfavor
Electrical power is commonly measured in watts (W) or in kilowatts (kW). A commercial solar panel generates about 0.10 watts per square inch of surface area. Based on this, how many kilowatts of power could be generated by a residential solar panel array with a surface area of 457 ft2?
The electrical power generated by a residential solar panel array with a surface area of 457ft² is 6580.8 watts.
The commercial solar panel generates about 0.10 W/in². To find the electrical power generated by a residential solar panel with a surface area (S) of 457 ft² we need to convert the unit from ft² to in², as follows:
[tex] S = 457 ft^{2}*\frac{144 in^{2}}{1 ft^{2}} = 65808 in^{2} [/tex]
Then, the electrical power generated is:
[tex] P = \frac{0.10 W}{in^{2}}*65808 in^{2} = 6580.8 W [/tex]
Therefore, the electrical power generated by the residential solar panel is 6580.8 W.
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You and your friend each drive 50.0 km.
You travel at 90.0 km/hr. Your friend travels at 105 km/hr.
For how many minutes will your friend be waiting for you at the end of the trip?
Round your answer to the nearest minute.
Answer:
Friend will wait 5 minutes
Answer:
you're Friend will wait 5 minutes
A batter pops a ball straight up (a) If the ball returns to the height from which it was hit 4.5 s later, what was its
initial speed? (b) Does the ball reach its maximum height 2.25s after it was hit, more than 2.25s after it was hit, or
less than 2.25s after it was hit? Explain. (c) Find the maximum height of the ball, as measured from the point
where it was hit.
Answer:
a) S = V0 t + 1/2 a t^2 distance ball travels in time t
0 = V0 t - 1\2 * 9.8 * t^2 ball returns to original height
V0 = 4.9 * 4.5 = 22.05 m / s original speed
b) Since V0 = g t time to decelerate to zero
t = 22.05 / 9.8 = 2.25 sec time up equals time down
c) S = V0 t + 1/2 a t^2
S = 22.05 * 2.25 - 9.8 / 2 * 2.25^2 = 24.8 Max height
Check: Avg speed = 22.05 / 2 = 11.025 m/s
Time to fall from max height = 11.025 * 2.25 = 24.8 ft
After a batter pops a ball straight up we have:
a) The initial speed of the ball before it returns to the height from which it was hit 4.5 seconds later, is 22.07 m/s.
b) The ball reaches its maximum height 2.25 s after it was hit.
c) The maximum height of the ball, s measured from the point where it was hit, is 24.8 m.
a) The initial speed can be calculated with the following equation:
[tex] v_{f} = v_{0} - gt [/tex]
We will use this equation to find the initial speed when the ball is moving upward.
Where:
[tex]v_{0}[/tex]: is the initial speed =?
[tex]v_{f}[/tex]: is the final speed = 0 (at the maximum height)
g: is the acceleration due to gravity = 9.81 m/s² (it is negative because its direction is in the opposite direction to the movement of the ball when it is going up)
t: is the time when the ball is going up
When the ball is going up, the time is:
[tex] t = \frac{4.5 s}{2} = 2.25 s [/tex]
Hence, the initial speed is:
[tex] v_{0} = gt = 9.81 m/s^{2}*2.25 s = 22.07 m/s [/tex]
b) The ball reaches its maximum height 2.25 s after it was hit because the ball returns to the height from which it was hit. The rise time is equal to the fall time.
c) The maximum height of the ball is the following:
[tex] v_{f}^{2} = v_{0}^{2} - 2gh [/tex]
Where:
h: is the maximum height
Then, the maximum height is:
[tex] h = \frac{v_{0}^{2}}{2g} = \frac{(22.07 m/s)^{2}}{2*9.81 m/s^{2}} = 24.8 m [/tex]
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3.
How does the enrollment in physical science compare
with that in chemistry over the years? Do you see any
trends?
There is an greater upward trend in the number of student enrollment in physical science than in chemistry over the years.
From the line graph attached;
For physical science ;
A temporary decline in student enrollment could be observed between 1964 - 1965. Afterwards, from 1965 upward, the Number of student enrollment has been on the increase. Enrollment in 1964 is 60 students and the number of enrollment in 1968 is 70For chemistry,
The number of student enrollment in the subject hasn't been steady as it increases and decreases temporarily over the years. The starting Number of enrollment in 1964 is 55 students and the number of enrollment in 1968 is about 58Learn more : https://brainly.com/question/18052685
What type of diagrams are used to present the conditions that are available to control outputs based on inputs?
A Block
B. Panel
C. Schomatic
D. Ladder
Answer:
a
Explanation:
because it shows how this gets in
Answer:
a
Explanation:
I did this. already. good luck!
HELP Heeeeeeelp!
Hey remember this for 100 points just reposting it please helpppppppp.
She travelled in one third of time=160km
Total distance=160×3=480km
Time=6h
[tex]\\ \bull\tt\dashrightarrow Velocity=\dfrac{Displacement}{Time}[/tex]
[tex]\\ \bull\tt\dashrightarrow Velocity=\dfrac{480}{6}[/tex]
[tex]\\ \bull\tt\dashrightarrow Velocity=80km/h[/tex]
PLEASE ANSWER!!! WILL GIVE BRAINLIEST!!!!!
What is energy?
anything that has mass and takes up space
the ability to do work
all the "stuff" in the universe
phases: solids, liquids, and gases
Answer:
the ability to do work.
EXPLAINATION: .
in other words "the potential for causing changes" or "energy is the cause of any change" or "a work that a certain force *eg: gravitational* can do.
sorry if this is not the answer that you wanted but I couldn't understand your question that's why I wrote what I understood.
I need help on this question
Is the following statement an observation or an inference? "The house collapsed at the same time that the poles fell down." Explain
Answer: Observation (≧▽≦)
Explanation: An observation is what you noticed. That being said i noticed "The house collapsed at the same time that the poles fell down." //Hope this helped ≧▽≦//
what does alcohol changing radio stations or talking on a cell phone do to your reaction time
They make you have a slower reaction time
A lound sound has large
Answer:
amplitude
Explanation:
A loud sound has large very high amplitude
Question 8 of 10
How is a scientific theory developed?
A. An experiment is repeated over and over with the same results.
B. One scientist supports his or her hypothesis with an experiment.
c. A single experiment is carefully performed once.
D. Many different experiments are repeated many times.
SUNIT
Answer:
C
Explanation:
If the theory were to be proved you you need to repeat the experiment over and over again so that way you can prove that it is true wuth the same results.
Answer: D hope this helps!
difference between the speed and velocity?
Speed varies with Distance travelled w.r.t time
[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]
Whereas velocity varies with displacement w.r.t time.
[tex]\boxed{\sf Velocity=\dfrac{Displacement}{Time}}[/tex]
Why we don’t feel atmospheric pressure?
Answer:We don't feel atmospheric pressure because the pressure in our bodies is almost the same as the atmospheric pressure outside
Explanation:
I need to know which answer is correct
A 2.72 A current flows through a wire for
9.88 s. How much charge flows past a point
in the wire in that time?
[tex]\\ \rm\longmapsto I=\dfrac{Q}{t}[/tex]
[tex]\\ \rm\longmapsto Q=It[/tex]
[tex]\\ \rm\longmapsto Q=2.72\times 9.88[/tex]
[tex]\\ \rm\longmapsto Q=26.87C[/tex]
The amount of charge that flows past a point in the wire during that time is approximately 26.8976 Coulombs.
Electric charge is quantized, meaning it exists in discrete amounts and is measured in coulombs (C). The elementary charge, represented by the symbol "e," is the charge of a single proton or electron, approximately equal to 1.602 x 10^-19 coulombs. Protons carry a positive charge, while electrons carry an equal but opposite negative charge.
When electric charges are stationary, they create an electric field around them. When charges are in motion, they produce a magnetic field in addition to the electric field, leading to electromagnetic effects.
Charge is a fundamental property of matter that determines its interaction with electric and magnetic fields and is crucial to understanding and explaining various electrical and electromagnetic phenomena in the natural world.
To calculate the amount of charge that flows past a point in the wire use the equation:
Q = I * t
Where:
Q is the charge (in Coulombs)
I is the current (in Amperes)
t is the time (in seconds)
Given:
Current (I) = 2.72 A
Time (t) = 9.88 s
Substitute these values into the equation to find the charge:
Q = I t
Q = 2.72 A * 9.88 s
Calculating the product:
Q = 26.8976 C
Therefore, the amount of charge that flows past a point in the wire during that time is approximately 26.8976 Coulombs.
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An atom’s location on the periodic table provides information such as…
An atom’s location on the periodic table provides information such as;
1. Atomic number.
2. Number of valence electrons.
3. Atomic weight.
An atom can be defined as the smallest unit which comprises the matter that forms all chemical elements. Thus, atoms are typically the fundamental building blocks of matter and as such determines (defines) the structure of a chemical element.
Generally, atoms are typically made up of three (3) distinct particles and these are;
Protons. Neutrons. Electrons.Periodic table is an organized tabular array of all the chemical elements arranged in order of increasing atomic number (in rows).
Generally, an atom’s location on the periodic table (the group of elements it belongs to) provides information such as;
1. Atomic number.
2. Number of valence electrons.
3. Atomic weight.
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Order, from smallest to largest, the following objects:
Most asteroids
The Sun
The Milky Way
Earth
A cluster of galaxies
Most moons
Meteorites
Answer:
Meteorites,Asteroids,Most moons,earth,sun,the milky way,cluster of galaxies
Explanation:
Meteorites, Asteroids, Most moons, earth, the sun, the milky way, and a cluster of galaxies.
A solar system is a star and all of its planets, asteroids, comets, and other bodies. It is significantly bigger than a star.
A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centers.Galaxies also form clusters which are large-scale structures.The universe is everything. It contains billions of galaxies.A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxies, literally "milky", a reference to the Milky Way.
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The gravitational force produced between any two object kept 2.5*10^4 km apart is 580N. at what distance should be the kept show the gravitational force becomes half.
Answer:
d=s×t 2.5*10^4×580N=14500000
3. A Tylenol has 80 mg of acetaminophen.
How many grams is that
[tex]\boxed{\sf 1g=1000mg}[/tex]
[tex]\\ \sf\longmapsto 80g[/tex]
[tex]\\ \sf\longmapsto \dfrac{80}{1000}[/tex]
[tex]\\ \sf\longmapsto 0.08g[/tex]
give some sources of potential difference (P.D) that you know.
__________________
One example of a rechargeable source of P.D.
__________________
Give one example of a source of P.D. which is used once and finally thrown away_____________
A car accelerates from 7.0 m/s to 12.0 m/s in 5 s. What is the average acceleration for this time interval?
A. 25 m/s2
B. 3.8 m/s2
C. 1 m/s2
D. -1 m/s2
Answer:
A. 25 m/s2
hope it's right
If a car accelerates from 7.0 m/s to 12.0 m/s in 5 s, then the average acceleration for this time interval would be 1 m/s2.
Therefore the correct answer is option C.
What is acceleration?The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².
As given in the problem If a car accelerates from 7.0 m/s to 12.0 m/s in 5 s, then w have to calculate the average acceleration for this time interval,
By using the first equation of motion,
v = u +at
12 = 7 + 5a
5a = 5
a = 1 m/s²
Thus, the average acceleration of the car comes out to be 1 m/s², therefore the correct answer is option C.
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The satellite in the diagram has gravitational potential energy because of which of the following? Choose all that apply.
It has mass.
It is moving around Earth.
It has height above Earth's surface.
It is attracted by gravity toward Earth.
This question deals with the concept of Gravitational Potential Energy.
The gravitational potential energy of an object is the energy possessed by the object due to its position in the gravitational field.
The value of gravitational potential energy of an object is given by the following formula:
P.E = mgh
where,
P.E = Gravitational Potential Energy
m = mass of the object
g = acceleration due to gravity
h = height of the object in the gravitational field
According to this formula, the object (satellite) has gravitational potential energy due to the following:
It has mass (m).
It has a height above Earth's surface (h).
It is attracted by gravity toward Earth (g).
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please help only a few minutes to answer
Answer:
The ball final velocity is 85.75 m/s
Explanation:
According to the problem, ball is dropped from the window and it experience an acceleration due to Earth's gravity which is denoted by g.
Initially, the ball is at rest, so its initial velocity is zero. The ball takes 8.75 s to fall from the window and hits the ground.
The equation of motion for constant acceleration is :
v = u + at
Here v is final velocity, u is initial velocity, t is time and a is acceleration.
In this case, u is zero and a is equal to g. So, the equation becomes :
v = gt
Substitute 8.75 s for t and 9.8 m/s² for g in the above equation.
v = 9.8 x 8.75
v = 85.75 m/s
