Potential energy is stored energy because it has the potential to do something which laters turns into kinetic energy which is the moving energy.
If a truck loses 5610 J of energy as it slows down due to an external force of 425 N, what distance will it have moved after the force is first applied
Answer:
13.2m
Explanation:
Step one:
given data
Energy= 5610J
Force F= 425N
Required
The distance traveled
Step two:
We know that work done is given as
WD= force* distance
so
5610=425*d
divide both sides by 425
d= 5610/425
d=13.2m
A 105 kg football player runs at 8.5 m/s and plows into the back of an 85 kg referee running at 3.5 m/s on the field causing the referee to fly forward at 6.0 m/s.
What is the momentum of the referee after the collision?
Answer:
P = 510 Ns
Explanation:
Momentum is defined as the quantity of motion contained in a body. Mathematically momentum is defined as the product of mass and the velocity of the body. So in order to find out the momentum of the referee after the collision with the football player, we can use the following formula:
[tex]P = mv\\[/tex]
where,
P = Momentum of the referee after the collision = ?
m = mass of the referee = 85 kg
v = speed of the referee after collision = 6 m/s
Therefore,
[tex]P = (85\ kg)(6\ m/s)[/tex]
P = 510 Ns
Estimate the weight of honey that it would take to fill a bathtub. What factor is this heavier is this from water
Answer:
Weight of honey required to fill bath tub is 435kg
Honey is 1.45 times heavier than water
Explanation:
Rough volume of a bathtub is 300 litres
density of honey is 1.45 kg/L
Density of honey in bath tub is given by
[tex]\rho = \frac{mass}{volume}[/tex] where, mass is the weight of honey in bath tub and volume is volume of bath tub
on substituting the given values in above equation we get
1.45 = [tex]\frac{mass}{300}[/tex]
⇒1.45 x 300 = mass of honey in bath tub or weight of honey
⇒ weight of honey required to fill bath tub is 435kg
density of water is 0.997 kg/L
therefore for the same amount of volume the ratio of weight of honey to water is equal to ratio of density of honey to water
∴ [tex]\frac{W_h}{W_w} = \frac{\rho_h}{\rho_w}[/tex]
on substituting the value of densities we get
[tex]\frac{W_h}{W_w} = \frac{1.45}{1}[/tex]
⇒ honey is 1.45 times heavier than water
Using the CER, write an essay describing what might influence some teens to choose a sedentary lifestyle. 1. suggest ways to encourage these teens to become more physically active. 2. Use correct spelling and punctuation. Use no less than 8 sentences. *
Answer:
Sedentary lifestyle is the lifestyle by which most physical activity is abandoned, performing activities that do not require energy consumption or large muscle movements on a large scale, such as using a computer, driving a car or playing video games.
Today, most young people have gradually turned towards sedentary lifestyles, mainly motivated by the increase in technological availability, and the extensive dependence generated on technology both to communicate with their peers (cell phones, social networks, etc. .) and for leisure time (video games, etc.).
Some ways to promote physical activity in young people and prevent sedentary lifestyle can be to create sports groups, where young people can establish social relationships without depending on networks or technological devices, or establish tasks of physical activity during study or work hours.
Which example best matches the term refraction? (17 Points)
O A. Light spreads out after it travels through a keyhole
O B. A straw in a glass of water looks bent
O C. Seeing your image in a lake
O D. An orchestra of different sounds coming together to make a larger sound
Answer:
B
Explanation:
Just answerd that question!!!
Hope it helped!!!
.
Two laboratories use radiocarbon dating to measure the age of two wooden boat fragments found at the site of an ancient
shipwreck. Lab A finds an age of 515 +/-20 years for the first object; lab B finds an age of 585 +/-30 years for the second
object. Which of the following is true?
a. Lab B's reading is more accurate than Lab A's.
b. Lab B's reading is less accurate than Lab A's.
Lab B's reading is more precise than Lab A's.
d Lab B's reading is less precise than Lah A's
C
Answer:
Answer d) Lab B's reading is less precise than Lab A's
Explanation:
Recall that accuracy is a measure of how close to the actual physical quantity the experiment leads to. In this case, we don't know what the true age is,so we cannot tell which reading is more accurate.
But we can tell which reading is more precise given the value of their reported errors. Since Lab A shows a smaller error in years (+/- 20 years versus 30 years), as well as a smaller percent error (3.9% versus 5.1%), we can say that Lab's A reading is more precise than Lab B's reading.
This agrees with answer labeled d).
The image below shows four points on the orbit of a comet around the Sun.
At which point does the comet have the most gravitational potential energy?
A. Point B
B. Point A
C. Point C
D. Point D
The comet will have the most gravitational potential energy at : ( B ) Point A
Given that the gravitational potential energy between two bodies is expressed as
Ux = - GMm / d ------ ( 1 )
where :
G = gravitational constant
M = mass of larger body ( sun )
m = mass of comet
d = distance between the bodies
Therefore the greater the distance ( d ) between the bodies the less negative the potential gravitational energy the smaller body will possess. from the image attached below, the point on the orbit that is farthest from the sun is Point A
Hence we can conclude that the comet will have the most gravitational potential energy at : ( B ) Point A
Learn more about gravitational potential energy : https://brainly.com/question/15849218
Answer: its letter c
Explanation:
Find the magnitude of the impulse delivered to a soccer ball when a player kicks it with a force of 1360 N. Assume that the player's foot is in contact with the ball for 5.85 times 10^{-3} s. (Show your work)
please
Answer:
7.59Ns
Explanation:
Given parameters:
Force = 1360N
Time of contact = 5.85 x 10⁻³s
Unknown:
Impulse = ?
Solution:
The impulse of the ball is given as:
Impulse = Force x time
Impulse = 1360 x 5.85 x 10⁻³ = 7.59Ns
A boy pulls with a 92.5 N force on the handle of a 27.5 kg wagon while the handle makes an angle of 35.0 degrees with the horizontal. If friction is negligible, and the boy pulls a total distance of 215.6 m, how much work has the boy done
Answer:
[tex]W_b \approx 16336J[/tex]
Explanation:
From the question we are told that
Force of pull [tex]F= 92.5[/tex]
Weight of handle [tex]W_h=27.5 kg[/tex]
Angle of handle [tex]\angle =35.0[/tex]
Distance [tex]d=215.6 m[/tex]
Generally the work done by the boy can mathematically be represented as
[tex]W_b=F*dcos \theta[/tex]
[tex]W_b=92.5*27.5 *cos(35)[/tex]
Therefore
[tex]W_b=16336.34922J[/tex]
[tex]W_b \approx 16336J[/tex]
what makes 97 of the water on earth unfit for drinking
Answer:
presence of salt in oceanic water makes 97 of the water on the earth unfit for drinking
A SONAR used in a ship sends ultrasound waves and receives the echo after 2.0 s.Find the depth of the shoal of fish if the speed of sound in water is 1250 m/s
Given :
A SONAR used in a ship sends ultrasound waves and receives the echo after 2.0 s.
To Find :
The depth of the shoal of fish if the speed of sound in water is 1250 m/s.
Solution :
Let, the depth of the shoal fish is d.
Now, it is given that it takes 2.0 s to receive the echo.
Also, distance covered by echo is 2d.
Now, 2d = s × t
2d = 1250 m/s × 2 s
d = 1250 m
Therefore, the depth of the shoal of fish is 1250 m.
A track 400 m in periphery is to be laid out on the practice field. Each semicircular end must have a radius of at least 20 m, and each straight section must be at least 100 m. How should the track be laid out so that it encompasses the least area
Answer:
r = 31.8
Explanation:
To start with, we make the following assumptions. Let
r be the radius of semicircular end
l be the length of straight section
a be the area inside track, then
p = 2πr + 2l = 400
a = πr² + 2rl
2πr + 2l = 400
l = 200 - πr, substituting for l in area,
a = πr² + 2r(200 - πr)
a = πr² + 400r - 2πr²
a = 400r - πr²
In order to find our minimum area, we differentiate with respect to r and then it equate to zero
da/dr = 400 - 2πr = 0
r = 200/π, substituting for r in equation for l,
l = 200 - πr
l = 0 m
And since this is not possible, l must be 100 m (the minimum), and
r = (200 - 100)/π
r = 100/π = 31.8 m
Explain whether a tennis ball dropped from a high distance experiences an elastic collision or inelastic collision
What are some things that the outer planets have in common?
Answer:
there round that's one thing
Answer:
large size, number of moons, lack solid surfaces and none are capable of supporting life.
Explanation:
mass is 5 lb attached to a rope wound around a pulley. The radius of the pulley is 3 in. If the mass falls at a constant velocity of 5 ft/s, determine the power transmitted to the pulley, in hp.
Answer:
The power transmitted to the pulley is 0.0455 hp.
Explanation:
Given;
mass attached to the rope, m = 5 lb
radius of the pulley, r = 3 in
constant rate of fall of the mass, v = 5 ft/s
acceleration due to gravity, g = 32.2 ft/s²
1 lbf = 32.2 lb.ft/s²
The power transmitted to the pulley is calculated as;
P = Fv
P = (mg)v
[tex]P = 5 \ lb \ \times \ 32.2 \ \frac{ft}{s^2} \ \times \ 5 \ \frac{ft}{s} \ \times \ \frac{1 \ lbf}{32.2 \ lb.ft/s^2} \ \ = 25 \ \frac{ft.lbf}{s} \\\\[/tex]
in horse power, the power transmitted is calculated as;
[tex]P = \frac{25 \ ft.lbf}{s} \ \times \ \frac{1 \ hp}{550 \ ft.lbf/s} \ \ = 0.0455 \ hp[/tex]
Therefore, the power transmitted to the pulley is 0.0455 hp.
For a wave, what term is defined as the maximum height of a crest, or depth of a trough, relative to the normal level
Answer:
Amplitude.
Explanation:
Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.
Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data. Some examples of communication technologies that uses radio waves are radio set, mobile phones, television etc.
For a wave, an amplitude is defined as the maximum height of a crest, or depth of a trough, relative to the normal level
If the kinetic energy of a given mass is to be doubled, its speed must be multiplied by
1) 4
2) 2
3) 8
4) 2
Answer:
Either B or D. The answer itself is 2.
Explanation:
The equation for the kinetic energy would be 1/2*mv^2.
When m is doubled, we can plug in 1 and 2 to compare our answers.
Plugging in 1 for mass would give us the answer 1/2*v^2.
Plugging in 2 for mass would give us v^2. This means that the velocity was multiplied by 2, meaning that the answer is it is multiplied by 2.
I am not sure which answer is correct since there seems to be two answer choices with 2 in it, but the answer is either B or D (I will call it ABCD because I do not want to cause confusion by saying 2 multiple times).
According to you, at the instant that the clock at the rear of the car displays 12:00 noon, what time will be displayed on the clock at the front of the car
Answer:
Time displayed on clock at the front of car is 12:00 noon
Explanation:
According to the question the Time displayed on rear clock of the car displays 12:00 noon.
since car has maximum speed of car is 100 m/s
i.e., they does not move with relativity speed
hence there will be no time dilation in time
Therefore, Time displayed on clock at the front of car is 12:00 noon
A bungie jumper of mass 50kg is attached to a bungie with a constant of 100Nm. The unstretched length of the bungie is 15m. What is the maxmimum velocity of the jumper
Answer:
v = 18.5 m /s
Explanation:
The velocity of the jumper will go on increasing until his weight is more than the restoring force created in the bungle.
mg = kx
50 x 9.8 = 100 X
X = 4.9 m
Total fall = 15 + 4.9 = 19.9 m
kinetic energy gained due to fall by 19.9 m
= mgh = 50 x 9.8 x 19.9 = 9751 J
energy lost due to stored elastic energy in bungie
= 1/2 k x²
= .5 x 100 x 4.9²
= 1200.5 J
Remaining kinetic energy = 9751 - 1200.5 = 8550.5 J
1/2 m v² = 8550.5
.5 x 50 x v² = 8550.5
v² = 342
v = 18.5 m /s
The peripheral nervous system transfers information from the _______ to the rest of the body.
a. interneurons
b. sensory neurons
c. brain
d. glands
The peripheral nervous system transfers information from the sensory neurons to the rest of the body.
What is the function of peripheral neutrons?The peripheral nervous system transfers information from the sensory organs organs and muscles. The axons of these nerve cells can be found throughout the body. Information is received by the dendrites of nerve cells and the information moves down the axon to the cell body.
So we can conclude that the peripheral nervous system transfers information from the sensory neurons to the rest of the body.
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wht is a solar year?
Answer:
A tropical year, also known as a solar year, an astronomical year, or an equinoctial year, is, on average, approximately 365 days, 5 hours, 48 minutes and 45 seconds long.
Explanation:
A cart's initial velocity is +3.0 meters per second. What is its final velocity after accelerating at a rate of 1.5 m/s2 for 8.0 seconds?
A. 36 m/s
B. 9 m/s
C. 72 m/s
D. 15 m/s
Answer:
V = 15m/s
Explanation:
Given the following data;
Initial velocity = 3m/s
Time = 8secs
Acceleration = 1.5m/s²
To find the final velocity, we would use the first equation of motion;
V = U + at
Substituting into the equation, we have
V = 3 + 1.5*8
V = 3 + 12
V = 15m/s
Which layer of the blood vessel is made of strong, flexible fibrous connective tissue?
the innermost layer
the middle layer
the outermost layer
all layers
Katrina pushes off a flat sidewalk on her new skateboard
What causes her to move?
Answer:
Gravity and Friction
Explanation:
How gravity and friction work which u probably know
Scientists create models to better understand Earth. Which evidence has led scientists to conclude that there are different layers within Earth's interior?
A.analysis of seismic wave data
B.measurement of Earth's diameter
C.temperatures taken within each layer
D.rock samples taken from Earth's core
Answer:
it is A or D
Explanation:
Answer:
ANswer:A
Explanation:
a)Levers work because some forces produce a ______
plss helppp
Answer:
Force
Explanation:
Pablo's engineering team has developed a new material that is strong enough to withstand major impacts, including bullets, without breaking or deforming. He plans to design a new type of motorcycle helmet using the material as its outside covering. A prototype of the helmet is shown below. Pablo knows that other types of motorcycle helmets have outside coverings that bend and deform slightly on impact. So if Pablo's new helmet is going to be as effective at protecting people's heads as existing helmets, he'll need to
A.
slightly reduce the total mass of the new helmet by reducing the amount of internal cushioning.
B.
maximize the total mass of the helmet by adding flexible steel to the outside covering.
C.
increase the amount of cushioning on the inside of the new helmet to help it absorb impacts.
D.
use a thicker outside covering than other helmets to help prevent deformation even further.
Answer:
the answer is c
Explanation:
how does the tilt of earth affect the hours of daylight north of the tropical of cancer at the time of year shown?
Answer:
look it tilts and light
Which team sport utilizes judges to determine the points earned?
Answer:
Rhythmic Gymnastics
Explanation:
Two stones are thrown from the top edge of a building with a speed of 20 m/s, one straight down and the other straight up. The first one hits the street in a time t1. How much later is it before the second stone hits
Answer:
Second stone hist at 4.08 s later.
Explanation:
The second stone straight up, so we need to find the rise and descent time.
[tex]v_{f}=v_{i}-gt[/tex]
At the top, the final speed is 0 and t is the rise time.
[tex]0=20-gt_{r}[/tex]
[tex]t_{r}=\frac{20}{9.81}[/tex]
[tex]t_{r}=2.04 s[/tex]
Let's recall that the rise time is equal to the descent time.
So the total time of the stone will be
[tex]t_{t}=4.08 s[/tex]
Now, the second stone hits the street in t2 = 4.08 s + t1 s
But we just need the time after the first stone hist the street. So we just subtract the time t1 to the second time t2, which means t2 = 4.08 s.
Therefore stone hist at 4.08 s later.
The second stone hits the wall 4.08 seconds later.
To solve this question, we will use the equation of motion. In particular, the first equation of motion which states that;
v = u + at, where
v = the final velocity
u = the initial velocity
a = acceleration of gravity
t = time taken by the stone.
From the question, we're told that the stone is thrown with a speed of 20 m/s, which is the initial velocity. And a final velocity, v of 0 m/s. Using a constant of 9.81 for acceleration of the stone. We have,
0 = 20 - 9.81 × t
20 = 9.81t
t = [tex]\frac{20}{9.81}[/tex]
t = 2.039or 2.04 seconds.
Assuming that the time taken to ascent = time taken to descent, this means that the total time taken will be 2.039 + 3.039 = 4.078 seconds or 4,08 seconds.
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