Answer:
A
Explanation:
Which statement is true about rubber, a polymeric material?
A.) The normal rubber band will break when the strain is greater than 1. Because according to the srain formula,
Strain = extension / original length.
For strain to be greater than one, the extension must have been greater than the original length.
B.) A normal rubber band breaks when the strain is less than 10%. This is not true
C.When a small amount of sulfur is added, to provide cross-links between molecules in rubber, the elastic limit is reduced. Surfur increases the elastic limit
D.When a small amount of sulfur is added, to provide cross-links between molecules in rubber, the ultimate tensile stress is reduced. This is not true. Surfur increases the tensile stress of the elastic material
The correct answer is therefore A
When the 5.0 kg cylinder fell 100 m, the final temperature of the water was
°C and the change in temperature was
°C.
When the 5.0 kg cylinder fell 500 m, the final temperature of the water was
°C and the change in temperature was
°C.
Answer:When the 5.0 kg cylinder fell 100 m, the final temperature of the water was
✔ 26.17
°C and the change in temperature was
✔ 1.17
°C.
When the 5.0 kg cylinder fell 500 m, the final temperature of the water was
✔ 30.86
°C and the change in temperature was
✔ 5.86
°C.
Explanation:
Answer:
26.17. 1.17. 30.86. 5.86.
Explanation:
:o does anyone else have a great dane that is as tall as u when shes on her back legs and shes not fully grown...bc i do and im kinda mad about it
Answer:
Sadly yes TnT. Well mines a boy and I think he knows I hate it.
Explanation:
what are the benefits and harms of the james clerk maxwell discovery to humanity?
Answer:
With his work, Maxwell unified electricity, magnetism and light, which are known as «Maxwell's synthesis.» Such a synthesis set a milestone in the history of the unification of forces that were so powerful that many nineteenth-century physicists thought the physical laws were already sufficiently comprehended.
Explanation:
hope this helps and can I get brainliest pls
What happens to the gravitational force between two objects if:
a. the mass of one is doubled?
b. The masses of both are doubled?
c. The distance between them is doubled?
Explanation:
r madhava I have a great time lagega ki deri na koira amar in the the
What beliefs about goverment did early english colonists bring to america?
List the correct sequence taps should be used to form threads the full depth of a blind hole.
Which type of wave is faster?/Seismic Waves
Answer:
me
Explanation:
Please select the word from the list that best fits the definition
equals the output work divided by the input work
input force
efficiency
mechanical advantage
output force
compound machine
Answer:input work
Explanation:
Answer:
thankssssssssss\
Explanation:
A ship
a sound
wave
sends
straight
to the sea bed and receves the echo
1.5 seconds later. The speed of sound in
water
How deep is the
at that place?
collin
is 1500 m/s.
Sea
sea
Answer:
The sea bed is 1125 m deep.
Explanation:
Speed
It's the rate of change of the distance (d) traveled by an object over time (t).
The speed can be calculated by the formula:
[tex]\displaystyle v=\frac{d}{t}[/tex]
It's known the speed of sound in water is v=1500 m/s. A sound wave is sent to the sea bed and bounces back to the ship 1.5 seconds later.
That is the time the wave takes to travel twice the distance from the ship to the sea bed, thus the required distance uses half of that time or t=1.5/2 = 0.75 seconds.
Solving the equation for d:
d = v.t
d = 1500 m/s * 0.75 s
d = 1125 m
The sea bed is 1125 m deep.
Which of the following is NOT true of all the inner planets?
A
They are made of solid rock.
B
They are called gas giants.
C
They do not have rings.
D
They have impact craters.
Hi there! :)
[tex]\large\boxed{\text{B. They are called gas giants.}}[/tex]
In the solar system, we can categorize the planets as such:
Inner planets: Mercury, Venus, Earth, Mars
Outer planets: Jupiter, Saturn, Uranus, Neptune
The Inner planets are the only planets that consist of solid rock. They also do not have rings and have impact craters due to their early formation.
In comparison, all of the outer planets are primarily made up of gaseous material and contain rings.
Therefore, the correct choice is B.
Using F=mXa
1.
Maria's bicycle has a mass of 18.0 kg. What is the net force needed to attain the
acceleration of 1.62 m/s2?
Answer:
29.16 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 18 × 1.62
We have the final answer as
29.16 NHope this helps you
The first one playing chinese garter will be chosen by doing
a. save
b. jack en poy
c. stretching
d. mother/father
e.one
f. "it" team
Answer:
B: jack en poy
Explanation:
Rock paper scissors is a hand game played between 2 people and mostly used as a method of fairly choosing between two people just like the way flipping a coin, drawing straws, or even throwing dice is used to select a choice at times to settle a dispute or make an unbiased decision.
Now the Chinese garter is a popular game among Filipino children that requires flexibility, balance & coordination. This game is played in such a way that it is designed to revolve about an ordinary garter which is usually about two to three yards long and can be brought from sewing store.
Now, to select the first one to play, as stated above, a rock paper scissors game can be used to make an unbiased choice of who to start.
However, among Philipinos, this rock paper scissors game is called "jack en poy"
Thus, option B is correct
The voltage in a battery is 9 volts. The resistance is 3 ohms.
What is the current?
6 amps
3 amps
12 amps
27 amps
Answer:
3 amps
Explanation:
easily
a radioactive tracer has a half-life of 2 hours. how much of a 2500g sample will be avalible after 18 hours
Answer:
i believe the answer is 2.44140625 grams remaining
Answer:
4.88g
Explanation:
We must first calculate how many half-life there are in 18 hours, knowing that each half life takes 2 hours.
18/2 = 9 Half life
Now, knowing this we can calculate the number of grams by applying 9 times the half life.
2500/2= 4.88 grams
Which means that after 18 hours there are 4.88 grams.
Kinetic Energy HELP! Brainly included
Answer:
A
Explanation:
When you dropping the swing, it increases the kinetic energy. In the middle, that is when it is at it's fullest potential. As it makes its way up, it pushes again the gravitational force, and soon, the swing will stop at the top for a VERY SHORT AND SMALL period of time. That is when it is at it's very weakest point, making the answer, indeed, A.
how much power is used for machine does 28J of work and 7 seconds
Answer:
3N
Explanation:
Optimistic people:
A. see the glass as half full.
B. attribute their successes to their own abilities.
C. have a higher chance of becoming depressed.
D. attribute their success to outside influences.
Answer:
A or B im prettu sure
Explanation:
a is a very commom answer so id go with that
Optimistic people see the glass as half full. The correct option is A.
What is optimism?Optimists look for the bright side of things. They anticipate a positive outcome. They believe they have the skill and ability to bring about positive change.
A person can also be generally optimistic; as part of their personality, they are always looking on the bright side and expecting the best.
An optimist is someone like this. Optimism is a general positive attitude that sees the glass as half full.
Optimism is a positive, hopeful outlook on the future, on yourself, and on the world around you. It is an important component of resilience, the inner strength that helps you get through difficult times. Optimism, by definition, helps you see, feel, and think positively.
Thus, the correct option is A.
For more details regarding optimism, visit:
https://brainly.com/question/9824989
#SPJ2
Potential Energy is energy due to _____________.
Answer:due to
Explanation:
To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
What is the chemical formula for sulfur trioxide? O SO3 O SIO3 8 O SO O SIO
Sulfur trioxide/Formula
SO3
this is what i looked up and got
Y’all this assignment determines if i pass , please help me out.. Part 2: Graphing the Effect of Changing Mass and Velocity on Kinetic Energy.
Answer:
* energy is proportional to masses. in a graph it would look like a line
* kinetic energy varies with the square of the velocity, In a graph it gives rise to a quadratic curve
Explanation:
Kinetic energy is defined by
K = ½ m v²
when analyzing this expression we can see:
* energy is proportional to masses. Therefore, doubling the mass doubles the kinetic energy and if the mass rises 4 times the energy rises 4 times, that is, they are directly proportional, in a graph it would look like a line
* kinetic energy varies with the square of the velocity. Therefore by doubling the speed the energy goes up 4 times. In a graph it gives rise to a quadratic curve
Of all the planets in our solar system, Jupiter has the greatest gravitational strength. If a 1.5 kg pair of running shoes would weigh 34.65 Newtons on Jupiter, what is the strength of gravity there.
Answer:
gₓ = 23.1 m/s²
Explanation:
The weight of an object is on the surface of earth is given by the following formula:
[tex]W = mg[/tex]
where,
W = Weight of the object on surface of earth
m = mass of object
g = acceleration due to gravity on the surface of earth = strength of gravity on the surface of earth
Similarly, the weight of the object on Jupiter will be given as:
[tex]W_{x} = mg_{x}[/tex]
where,
Wₓ = Weight of the object on surface of Jupiter = 34.665 N
m = mass of object = 1.5 kg
gₓ = acceleration due to gravity on the surface of Jupiter = strength of gravity on the surface of Jupiter = ?
Therefore,
[tex]34.65 N = (1.5 kg)g_{x}[/tex]
[tex]g_{x} = \frac{34.65 N}{1.5 kg}[/tex]
gₓ = 23.1 m/s²
You fire a paintball from a paintball gun straight up into the air at 25.0 m/s What is the instantaneous velocity at the top of its flight?
Answer:
The instantaneous velocity at the top of its flight is v = 0 m/s
Explanation:
From the question we are told that
The initial velocity is u = 25.0 m/s
Generally an instantaneous velocity can be defined as the velocity of an object at an instant of time period during its motion, , generally the velocity of a object at it maximum height is 0 m/s hence the instantaneous velocity of the paintball at the top of its flight is 0 m/s
Barycenter is not the center of mass of two or more celestial bodies.
Answer:
barycenter is the center of mass of two or more bodies that orbit one another and is the point about which the bodies orbit. It is an important concept in fields such as astronomy and astrophysics. The distance from a body's center of mass to the barycenter can be calculated as a two-body problem.
Explanation:
A force of 20 N compresses a spring with a spring constant 50 N/m. How much energy is stored in the spring?
Answer:
4J
Explanation:
Hooke's Law states:
F = -kx
where F = force
k = spring constant
x = displacement of spring
20 = -(50)x
-20/50 = x = -2/5
We can now use this information to find the energy in the Elastic Potential Energy Formula which is...
1/2(k)(x)^2
1/2(50)(2/5)^2 = 4J
Given:
Force, F = 20 NSpring constant, k = 50 N/mBy using the Hooke's law states,
→ [tex]F = -kx[/tex]
By substituting the values, we get
→ [tex]20= -(50) x[/tex]
[tex]x = -\frac{20}{50}[/tex]
[tex]= -\frac{2}{5}[/tex]
hence,
The energy will be:
= [tex]\frac{1}{2} kx^2[/tex]
By putting the values,
= [tex]\frac{1}{2}\times 50\times (\frac{2}{5} )^2[/tex]
= [tex]4 \ J[/tex]
Thus the above answer is right.
Learn more about force here:
https://brainly.com/question/14670501
Maya kicks a soccer ball 40 N towards east. At the exact same time, Casey kicks
the same ball toward west. The resultant force of the soccer ball is about 36 N
east. The force that Casey kicks the soccer ball toward west is
Answer:
GDXMZC<XZDFSaYTULRSHYADTGVS
Explanation:
KJ.KHG<DCŞJHJdjhgjöfhds DCSLÇKÖJMNHBGEVCYRWX
A small car with a mass of 800 kg is moving with a velocity of 30 m/s. What is the momentum of the car?
Required? Substitute and Solve
A. 2.67 kg-m/s
B. 24000 kg-m/s
C. 770 kg-m/s
D. 830 kg-m/s
Answer:
B. 24000 kg-m/s
Explanation:
Momentum equation: p = mv
p = 800 kg * 30 m/s = 24000 kg-m/s
plzzz help me solve this .
A vertical spring of unstretched length 30cm is clamped at its upper end. when sand is placed in a pan attached to the lower end of the spring its length becomes 45cm .when 20g mass is placed on top of the sand the length increases to 55cm
(1) determine the mass of the sand
(2) if the spring in a above is compressed from its original length to the length of 24cm,calculatethe work done in compressing the spring
Answer:
(1) 30 g
(2) [tex]3.5316 \times 10^{-3}[/tex] Joules
Explanation:
The unstretched length of the spring =30 cm
Assuming that the spring is linear.
(1) Let the mass of the sand be m kg. So, the gravitational force acting on the sand in the downward direction is mg N, which acts on the spring.
Due to the sand load, the length of the spring becomes 45 cm, so the extension in the spring, [tex]x_0[/tex] = 45-30=15 cm = 0.15 m.
As the spring is linear, so
[tex]mg=kx_0\cdots(i)[/tex]
where k is spring constant and g is the acceleration due to gravity.
When the 20 g mass is placed on the top of the sand, then the total load on the spring = m+0.02 kg
The gravitational force acting on the spring due to this load [tex]= (m+0.02)g[/tex] N
As the length of the spring becomes 55 cm, so the extension in the spring, [tex]x_1[/tex] = 55-30=25 cm = 0.25 m.
Now, [tex](m+0.02)g=kx_1\cdots(ii)[/tex]
Dividing equation (ii) by (i), we have
[tex]\frac{(m+0.02)g}{mg}=\frac{kx_1}{kx_0} \\\\\frac{(m+0.02)}{m}=\frac{x_1}{x_0} \\\\1+\frac{0.02}{m}=\frac{x_1}{x_0} \\\\\frac{0.02}{m}=\frac{x_1}{x_0}-1 \\\\[/tex]
On putting all the values, we have
[tex]\frac{0.02}{m}=\frac{0.25}{0.15}-1 \\\\\frac{0.02}{m}=\frac{2}{3} \\\\m=\frac{3}{2}\times 0.02 \\\\[/tex]
m=0.03 kg = 30 g
Therefore, the mass of the sand is 30 g.
(2) Putting m=0.03 kg in the equation (i) to get the value of spring constant, k.
(0.03)g=k(0.15)
0.03 x 9.81 = k(0.15) [as g=9.81 m/[tex]s^2[/tex]]
k=(0.03 x 9.81)/0.15
k=1.962 N/m
The spring is compressed from its original length to the length of 24cm, so the magnitude of change in length, x=30-24=6cm=0.06m.
So, the work done in compressing the spring,
[tex]w= \frac 1 2 k x^2[/tex]
[tex]w=\frac 1 2 \times 1.962 \times 0.06^2[/tex]
[tex]w=3.5316 \times 10^{-3}[/tex] Joules.
Therefore the work done in compressing the spring is [tex]3.5316 \times 10^{-3}[/tex] Joules.
Cars, trucks, and SUVS use seatbelts as safety devices. Roller coasters use
bars. Use Newton's 1* Law of Motion to explain how the seatbelt or restraint
bar help keep you safe ina collision. Be sure to identify forces and velocity.
sorry
Explanation:
Sorry
What are the units for impulse?
A. kg•m/s
B. kg/s
C. kg•m^2/s
D. kg m/s^2
Answer:
A. kg•m/s
Explanation:
Which of the following is a form of mechanical energy?
A. Thermal energy
OB. Nuclear energy
O C. Chemical energy
O D. Gravitational potential energy
Answer:
D. gravitational potential energy
Explanation:
