Answer:
due to variations of the force of gravity from place to place
Explanation:
at different places we have different force of gravity...that's why weight change but mass never change
How do you find out the missing masses in a balloon
Answer:
How do you find out the missing masses in a balloon?
Well, actually you can't find the missing masses in a balloon. Why?
Because the mass of the mass of balloon, it can't see the mass of it, it only see if it the balloon is deflated or inflated.
Explanation:
Hope it helps
#LetsStudy
A medium-sized apple provides about 95.0 Calories of energy.
(a) Convert 95.0 Cal to joules.
(b) Suppose that amount of energy is transformed into kinetic energy of a 2.03 kg object initially at rest. Calculate the final speed of the object (in m/s).
(c) If that same amount of energy is added to 3.79 kg (about 1 gal) of water at 21.7°C, what is the water's final temperature (in °C)? The specific heat of water is
c = 4186
J
(kg · °C)
.
A. 95 Cal is equivalent to 397480 J
B. The final speed of the object is 625.78 m/s
C. The final temperature of the water is 46.8 °C
A. Converting 95 Cal to Joules
1 Cal = 4184 J
Therefore,
95 Cal = 95 × 4184
95 Cal = 397480 JThus, 95 Cal is equivalent to 397480 J
B. Determination of the speed of the object
Kinetic energy (KE) = 397480 J
Mass (m) = 2.03 Kg
Velocity (v) =?KE = ½mv²
397480 = ½ × 2.03 × v²
397480 = 1.015 × v²
Divide both side by 1.015
v² = 397480 / 1.015
Take the square root of both side
v = √(397480 / 1.015)
v = 625.78 m/sTherefore, the speed of the object is 625.78 m/s
C. Determination of the final temperature of the water
Mass of water (M) = 3.79 kg
Initial temperature of water (T₁) = 21.7 °C
Specific heat capacity of water (C) = 4186 J/KgºC
Heat (Q) = 397480 J
Final temperature (T₂) =?Q = MC(T₂ – T₁)
397480 = 3.79 × 4186 (T₂ – 21.7)
397480 = 15864.94 (T₂ – 21.7)
Clear the bracket
397480 = 15864.94T₂ – 344269.198
Collect like terms
397480 + 344269.198 = 15864.94T₂
741749.198 = 15864.94T₂
Divide both side by 15864.94
T₂ = 741749.198 / 15864.94
T₂ = 46.8 °CTherefore, the final temperature of the water is 46.8 °C
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NEED HELP!!! ANSWER THESE 5 QUESTIONS FOR 25 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINEST
1. Jerome explains to his doctor that because he spends a lot of time at his desk, he makes sure that his chair supports good posture. But when he is home, he spends his time on an old, squishy couch that offers very little support. He figures that since he spends most of his time at work, he does not need to worry about his home furniture as much. How would Jerome’s doctor MOST likely reply?
A.
Jerome’s thinking is correct since he spends most of his time at work.
B.
Jerome should bring his chair from work home with him on the weekend.
C.
If Jerome’s standing posture is good, he does not have to worry about his seated posture.
D.
Sitting properly is important in all contexts, so Jerome should consider his seating at home.
2. Guillermo has decided that he wants to be healthier, so he starts jogging. He has been at it for a week, but he is getting frustrated because he cannot run very far without getting out of breath. He is beginning to think that this is not a good exercise for him since he is not very good at it. What BEST explains why Guillermo is struggling?
A.
He probably does not have good form when he is exercising.
B.
He likely has heart or lung problems that he was not aware of.
C.
He does not have much endurance since he is new to exercise.
D.
He is just not good at jogging and needs to try something else.
3. Which is the BEST example of the kind of mechanics that are studied in sports biometrics?
A.
the average attendance at a sporting event
B.
how a new sport becomes popular in a community
C.
the movement of the wrist when hitting a tennis ball
D.
the median height of the most successful hockey goalies
4. Ewan had a resting heart rate of about 110. What does this indicate?
A.
His heart rate is perfectly average.
B.
He probably has a high metabolism.
C.
He needs to work on raising his resting heart rate.
D.
His heart rate is high and could indicate a problem.
5. Why is acceptance an important part of building a healthy lifestyle?
A.
Exercise will probably not change much in your life.
B.
Healthy lifestyles often create a lot of disappointment.
C.
If you understand your limitations, you are less likely to be frustrated.
D.
Finding the energy to exercise can be hard, so you should limit your goals.
PLEASE NO LINKS
look at picture, need to know net force, whether they are balanced or unbalanced and whether they are accelerated or not accelerated!
Answer:
1) 100 ...unb. and accelerate
2) 7...unb. and accelerate
An athlete spins in a circle and throws a 1.6-kg discus. The radius of the discus's path is 1.0 m, and he releases it with an angular speed of 15.0 rad/s. The athlete spins for a total of 1.2 s before releasing the discus.
– What is the tangential speed of the discus at release?
– What is the centripetal acceleration of the discus?
– What is the centripetal force on the discus?
giving Brainliest for full and proper answers! thank you for anyone who tries to help/explain :)
(a) The tangential speed of the discus at the release is 15 m/s.
(b) The centripetal acceleration of the discus is 225 m/s².
(c) The centripetal force on the discus is 360 N.
The given parameters;
mass of the discus, m = 1.6 kgradius of the path, r = 1 mangular speed, ω = 15 rad/stime of motion, t = 1.2 sThe tangential speed of the discus at the release is calculated as follows;
[tex]v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s[/tex]
The centripetal acceleration of the discus is calculated as follows;
[tex]a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2[/tex]
The centripetal force on the discus is calculated as follows;
[tex]F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N[/tex]
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write a relations between wavelength frequency and velocity for a sound wave
Answer:
[tex]{ \boxed{ \mathfrak{answer : \: { \rm{v = f \lambda}}}}}[/tex]
Explanation:
v is the velocityf is frequencylambda is wavelength[tex]{ \underline{ \mathfrak{ \green{Good \: grace}} \: \:⚜ \: \: { \blue{ \mathfrak{Good \: God}}}}}[/tex]
4. A net force of 15 N is exerted on a book to cause it to accelerate at a rate of 5 m/s2. Determine the mass of the
book.
a. 0.33 kg
b. 2 kg
c. 3 kg
d. 45 kg
Answer:
3 kgExplanation:
The mass of an object given it's force and acceleration can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{15}{5} = 3 \\ [/tex]
We have the final answer as
3 kgHope this helps you
Two objects feel 200 N of force due to gravity between them. If the mass of one object was doubled, what would be the new force of gravity?
Answer:
你想知道你认为什么不是开放互联网不是开放互联网不是开放互联网不是开放互联网不是开放互联网
Make a
claim about whether a mixture could be made
up of only elements and no compounds.
Summarize evidence to support the claim and
explain your reasoning.
Answer:
Yes, a mixture can be made up of just elements and no compounds. The elements never experiance a chemical interaction and stay only in physical contact with each other.
BRAILIEST PLS I NEED LEVEL UP!
Career discovery
English language art
Science
Studiesi
Answer:
you could become a science teacher and if you do english literature too then an english teacher
Explanation:
you will just need to get good GCSEs and if you want to you can further your education. e.g, college, university.
An object has a acceleration of 10m/s^2 if the net force acting on this object were halved, what would the new acceleration of the object be
Answer:
As we increase the force on an object the acceleration increases proportionally. Since the mass does not change as the acceleration increases, we can say that force is equal to acceleration. Therefore, if you double the force you double the acceleration. ... Therefore, mass is inversely proportional to accelerationExplanation:I hope I helped you #learn from khabyIf an object has an acceleration of 10m/s^2 if the net force acting on this object were halved, then the acceleration of the object would become half as well because the force and the acceleration are directly proportional.
What is acceleration?
The rate of change of the velocity with respect to time is known as the acceleration of the object.
As given in the problem an object has an acceleration of 10 m/s^2 if the net force acting on this object were halved, then the new acceleration of the object be 5 meters / second².
Force = mass × acceleration
As the force is directly proportional to the acceleration of the object keeping the mass of the object constant.
Thus, the acceleration of the object would become 5 meters / second².
To learn more about acceleration from here, refer to the link;
brainly.com/question/2303856
#SPJ5
If you added enough ropes and pulleys to lift any size mass would it be possible to never have to apply a force to move your mass? Why or Why Not? Explain your answer using scientific terms we have been learning.
pls help!!
Answer:
we have to apply force to move something things wants to save their position and if we want to change it
we have too apply force
Answer:
we have to apply
them to have a answer
100 POINTS!! PLEASE DONT ANSWER UNLESS YOU KNOW BOTH ANSWERS PLEASE.
If a bike hits a rock and suddenly stops, the rider flies over the handlebars due to ________.
A. absolute zero B. displacement C. inertia D. electromagnetic spectrum
During a track meet, Sarah ran 400m in 80s. What was her average speed? (Remember s=d/t)
A. 5 m/s
B. 20 m/s
C. 15 m/s
D. 15 mph
Answer:
1. is B and 2. is A
Explanation:
Answer:
1. Displacement
2. 5 m/s 400 ÷ 80 = 5
Explanation:
A skydiver jumps from an airplane that is moving at 50 meters per second at a height of 1,000 meters what describes the skydivers energy immediately after leaving the air plane
Answer:
11060M Joules, where M is the mass of the diver in kg
Explanation:
Mass of the skydiver missing, we're assuming it's M.
It's total energy is the sum of the contribution of his kinetic energy (K)- since he's moving at 50 m/s, and it's potential energy (U), since he's subject to earth gravity.
Energy is the sum of the two, so [tex]E = K+U= \frac 12 M v^2 + Mgh = M (\frac 12 \cdot 50^2 + 9.81\cdot 1000) = M ( 1250 + 9810) = 11060\cdot M[/tex]
is there friction when an object stands still?
Answer:
No
Explanation:
The gravitational force always acts opposite the direction of motion. Air resistance only acts on objects that are moving. The force of friction does not exist when an object is stationary. All objects experience a normal force.
btw pls mark as branliest! Thanks!
what is electricity
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.
a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
Hope this helps
helppppppp meeee please
Answer:
B.X substance = sulfur dioxide, Y substances = sodium carbonate
Explanation:
sorry for wrong because that is my predicted
What is the net force needed to accelerate a 1 kg textbook with an acceleration of
4 m/s2
Answer:
4 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
mass = 1 kg
acceleration = 4 m/s²
We have
force = 1 × 4 = 4
We have the final answer as
4 NHope this helps you
Look at the circuit below. What is the potential difference across lamp 2?
The potential difference across lamp #2 is 4.5 volts.
name two possible ways in wivh fossils can be dated and define them
Answer:
There are two main methods determining a fossils age, relative dating and absolute dating. Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.
Mark me with a crown
Answer: dna
Explanation:
sorry if this is wrong lol
The symbols used in language have no direct relationship between the word and the object or idea.
Answer:
The symbols used in language have no direct relationship between the word and the object or idea. Underextension in language occurs when a child incorrectly uses one word to describe other objects or actions that are similar to that word. ... Morphemes are the smallest distinctive sound units in a language.
Explanation:
Answer:
True
Explanation:
e2021
The force of gravity between two students is 3.5E-8 Newtons. If
the first students mass is 71.0 kg and the second students mass is
67.0 kg, how far apart must the students be from each other?
Answer:
r = 9521.29
Explanation:
Given:
Gravitational Force = [tex]3.5E-8[/tex] (Fg)
Student Mass 1 = 71 kg (M)
Student Mass 2 = 67kg (m)
Gravitational constant = [tex]6.67E-4[/tex] (G)
[tex]Fg=\frac{GMm}{r^{2} }[/tex]
[tex]r^{2} =\frac{GMm}{Fg}[/tex]
[tex]r^{2} =\frac{(6.67E-4)*(71)*(67)}{3.5E-8}[/tex]
[tex]r= \sqrt{90654828.57}[/tex]
[tex]r=9521.282927[/tex]
r = 9521.29
Pythagoras theorem is used to find the resultant force when angle between 2 forces is _________ degrees. asap
0
45
90
180
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Pythagoras theorem is used to find the resultant force when angle between 2 forces is 90 degrees ~
Explain how bats use ultrasound to catch a prey
Answer:
Ultrasound is used by bats to navigate (move) and catch prey. Ultrasonic squeaks are produced by bats. These squeaks ponder prey and then return to the bat's ear. This provides bats with information about the location of prey, allowing them to catch it.
Explanation:
Please if you can give an explanation and not just the answer.
Answer:
what you perfect Wuman in the world just try and try I wish you get it just trust me I'm a Wuman and man
What is the power of a crane that lifts a 120 N load 14 m in 3.6 s?
Answer:
1000n
Explanation:
hop it helps
Answer:
467 watts
Explanation:
Power is = to work/time. Work is = to force (N) times distance from starting point. So first, calculate work. 120N x14m , which is equal to 1680 joules. so then plug it into your power formula. 1680 joules/ 3.6 seconds= 466.666...7, which rounds to 467 watts.
if a firework on the fourth of july is fired upwards from the ground with an initial speed of 200 m/s...
a. What is the total time the rocket spends ascending towards the sky?
b. How high up from the ground does the rocket travel?
(a) The time spent by the rocket ascending towards the sky is 20.4 s.
(b) The height traveled by the rocket from the ground is 2,040.8 m.
The given parameters:
initial speed of the firework, [tex]v_o[/tex] = 200 m/sThe time spent by the rocket ascending towards the sky is calculated as follows;
[tex]v_f = v_0 -gt[/tex]
where;
[tex]v_f[/tex] is the final velocity of the rocket at the maximum height
[tex]0 = v_0 -gt\\\\gt = v_0\\\\t = \frac{v_0}{g} \\\\t = \frac{200}{9.8} \\\\t = 20.4 \ s[/tex]
The height traveled by the rocket from the ground is calculated as follows;
[tex]h = v_0t - \frac{1}{2} gt^2\\\\h = 200(20.4) \ - \ \frac{1}{2} (9.8)(20.4)^2\\\\h = 2,040.8 \ m[/tex]
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2. A roller coaster moves 85 m horizontally, then travels 45 m at an angle of
30.0° above the horizontal. What is its displacement from its starting
point? Use graphical techniques.
the weight of a box having of 100 kg is __n
Answer:
mom
Explanation:
There are seven fundamental quantities in physics. true or false
Answer:
True
Explanation:
mass, length, time, electric current, temperature, luminous intensity and amount of substance
