The air in a tire pump has a volume of 1.5 L at a temperature of 5 ℃. If the temperature is increased to 25 ℃ and the pressure remains constant, what is the new volume of the tire pump
Answer:
Explanation:
5 C = 278 K
25 C = 298 K
V1 / T1 = V2 / T2
1.5L / 278 K = V2 / 298 K
V2 = (1.5L * 298) / 278
V2 = 1.61 L
Thea uses a hairdryer to dry her hair. The hairdryer has an efficiency of 0.5 and the total input energy is 180 kJ. How much of the energy supplied is wasted? Give your answer in joules
90kJ of the energy supplied to the hair dryer is wasted.
Efficiency is the ratio of output to input. It is given by:
Efficiency = output / input
Given an efficiency of 0.5 and the total input energy is 180 kJ. Hence:
Efficiency = output / input
0.5 = output / 180 kJ
Output = 90 kJ
Amount of wasted energy = Input - output = 180kJ - 90kJ = 90kJ
Therefore 90kJ of the energy supplied is wasted.
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Câu hỏi: Một bộ acquy có thể cung cấp một dòng điện 2 A liên tục trong 1 giờ thì phải nạp lại. Cường độ dòng điện mà acquy này có thể cung cấp nếu nó được sử dụng liên tục trong 5 giờ thì phải nạp lại là
0,4 A.
2,5 A.
2 A.
10 A.
Answer:
I don't understand anything get it or what
9. A car of 1200 kg is rolling down a hill. When the car reaches a momentum of 7800 kg
m/s, what is its velocity?
Answer:
V = p/m = 7800/1200 = 6.5m/s
Explanation:
Is the daughter or the science teacher correct? And why?
Answer:
The daughter. I can't really explain but practically, it happens as the daughter has stated.
The moment the skateboard starts moving (after skateboarder pushes it). Which of Newton's laws is most relevant to this action?
Answer:
The law of gravity
Explanation:
If a ball is thrown from a tall building, how tall is the building if it takes 4s for the ball to land.
Let’s assume that we can ignore the resistance of the air (as one usual does in physics homework).
The distance ‘s’ traveled by an object under constant acceleration ‘a’ in a time ‘t’ is given by
s = 1/2 a t^2
if the object starts at rest. As t=4 seconds and ‘a’ is the usual 9.81 m/s^2, you can put the numbers in and get
s=8*9.81 m ~78.5m or 78 500 cm
A foot amounts to (as you know) 30.3 cm, so you have to divide the above number by the 30.3cm/ft and get
s ~ 257 ft.
Explanation:
the diagram shows a duck swimming in a stream in the opposite direction the stream is flowing. The duck pushes against the water, so the water pushes the duck forward with 20 newtons of force. the water also exerts 15 newtons of resistive force against the duck. Which statement best describes the resulting motion of the duck?
The resulting motion of the duck is best described by this statement: C. The duck will continue moving in its current direction.
Motion can be defined as a change in the position (location) of an object or physical body such as a duck, with respect to a reference point.
This ultimately implies that, motion only take place due to a change in position (location) of an object with respect to a frame of reference or reference point i.e the stationary position where an object was standing before the effect of an external force.
Given the following data:
Forward force = 20 Newton.
Resistive force = 15 Newton.From the data given, we can deduce that the forward force (20 Newton) is greater than the resistive force (15 Newton) and as such the duck will continue to move in the current direction (forward).
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Your question is lacking the necessary answer options, so I will be adding them here:
A. The duck will stop moving.
B. The duck will stop and then start moving again.
C. The duck will continue moving in its current direction.
D. The duck will move in the direction that the stream is flowing.
How did the volcano Mt. St. Helens form?
A. This is a random hotspot on the earth where magma comes to the surface, it is
not at any plate boundary
B. This is a divergent boundary and plates are moving apart here to form volcanoes
and mountains
C. ML St. Helens is at a continental-continental convergent boundary and there are
no trenches here
D. Subduction a an oceanic continental convergent boundary caused a mountain
range to form and magma to come to the surface
Given what we know about volcanic formations, we can conclude that the Mt. St. Helens volcano was formed by the process described in option D, "Subduction an oceanic continental convergent boundary caused a mountain range to form and magma to come to the surface".
Mt. St. Helens is a volcano that falls under the category of a stratovolcano. Stratovolcanoes are volcanoes that commonly form at subduction zones. This process forms chains or clusters of mountains along the boundaries of tectonic plates, where oceanic crust is pulled under another type of crust. This process tends to form mountain ranges which contain volcanoes, such as:
Cascade Range (To which Mt. St. Helens belongs)Los AndesRocky MountainsCampania Mountain rangeand so on.
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I cant figure this out for so long. thank you in advance whoever helps me
Answer:
a magnet is a material with a North and South pole
transivity, reflexivity, and identity refer to what kind of reasoning?
Deductive reasoning. Deductive reasoning implies the use of a given set of facts or data to deduce other facts, by reasoning logically. It rearranges information that is already known into new statements or truths. Hence transitivity, reflexivity, and identity refer to it and are necessary elements.
What are deductive reasoning and examples?Deductive reasoning is a type of deduction used in science and in life. It is when you take two true statements, or premises, to form a conclusion. For example, A is equal to B. B is also equal to C. Given those two statements, you can conclude A is equal to C using deductive reasoning.
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NEED HELP!!! ANSWER THESE 5 QUESTIONS FOR 25 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINLIEST
1. Therese plays lacrosse, but she has injured her ankle and has to take a few weeks off. She is finding that she has a lot of trouble sleeping since she is no longer practicing several days a week. What BEST explains this?
A.
She needs regular exercise to move oxygen through the blood.
B.
She clearly requires more exercise than most people to relieve stress.
C.
She is not releasing the endorphins that she used to, and that impacts her sleep.
D.
She is likely not maintaining the healthy habits that she did when she was practicing.
2. Imagine that you are running and want to track your heart rate. What is the easiest way to do this?
A.
Check your pulse at the wrist or neck.
B.
It can’t be done without special equipment.
C.
Close your eyes and count to 30 very slowly.
D.
Take off your shoe and check the top of your foot.
3. 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.
4. Li Wei loves cardio and finds it very easy to fit into his schedule. Because he knows it is important to diversify his exercise routine, sometimes he runs and other days he rides his bike. What else should Li Wei consider regarding his routine?
A.
He should add some strength training.
B.
He needs to add one more form of cardio.
C.
He has too much cardio and should cut half of it.
D.
His program works for him, so he should not change it.
5. Jamar has decided that he is going to train for a marathon. He knows that it will take a lot of training, and that he will need to build his muscles. What part of the muscle does he need to build?
A.
oxygen levels
B.
fast twitch fiber
C.
slow twitch fibers
D.
large muscle mass
PLEASE NO LINKS
Answer:
1.A
2.C
3.A
4.B
5.D
Explanation:
CORRECT ME IF IM WRONG
Highest common factor of 12r and 10
I think the number 2, not sure
You receive a generic email notification about an issue with the delivery of a recent order. You’re instructed to click on a link included in the email for further information about the order. When you click, it opens a webpage which asks for your account username and password before you can view the information. Which of the following is the biggest red flag in this scenario?
A. There is an issue while delivering your order.
B. The email you received was a generic notification.
C. The information about the delivery problems is not contained in the email.
D. Your username and password are required to view the information.
Answer: C. The information about the delivery problems is not contained in the email.
Explanation: please give brainliest
The diagram shows an idea for a perpetual motion machine. The car runs on electricity. As it moves along, the air moving past the car turns the generator on the roof. This generates the electricity needed to power the car.
Question on the paper
Let us begin by explaining the Energy transformation that will take place
Because the car runs on electricity, electrical energy that is stored in form of chemical energy is converted to mechanical energy that causes the car to moveNow when the car is in motion, the fan rotates, and my means of electro magnetic induction, the rotational(Mechanical Energy) possessed by the fan is converted to electrical energy which will then be converter to chemical energy stored in the battery of the carOk, let us discuss about why the idea will not work
Although the system will work, but to some extent, that is it will not sustain the process, over time the system will consume more energy than it will generate
Going my the law of thermodynamics "There is no perpetual motion machine of the first order" hence theoretically the system is not possible
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just need to know net force, unbalanced or balanced and accelerated or not accelerated :)
Answer:
9. forces: BALANCED, object will: NOT ACCELERATE
10. Forces: UNBALANCED, object will: ACCELERATE
Explanation: sorry I don't no the net force but hope this helps for know
what is this it tastes sour
A. diamond
B. sugar
C. salt
D. cinnamon
Answer:
salt
Explanation:
it comes from sea water
Answer:
Salt
Explanation:
It’s not cinnamon ( I know because if the picture)
it’s not sugar (sugar is sweet not sour)
IT MIGHT BE SALT (it’s salt)
its nit diamond (diamond doesn’t have a taste?)
How does alpha particles transfer energy to their surroundings?
Which evidence did Wegener use to develop the theory of continental drift?
Similar fossils were found on different continents.
The climate of Siberia has always been the same.
There is no evidence of glaciers anywhere in South America.
The Rocky Mountains are taller than the Appalachian Mountains.
Answer:
your answer is There is no evidence of glaciers anywhere in South America.
have a good day!
Explanation:
Answer: C
Explanation: i took the test so its correct :)
Which event demonstrates electromagnetic waves transferring energy?.
Answer:
Radiation is the transfer of heat energy through space by electromagnetic radiation.
Explanation:
Why is graphite used in pencils
Answer:
The different layers of carbon atoms present in graphite are bounded by weak van der Waals forces. ... The cleaning between the layers is done by graphite, thus, it is so slippery and soft. This is the reason why graphite is used in pencil and as lubricants in machines which operate at high temperature.
grahite is used in pencils because its so oily and it also forms quickly so it best sometimes
Describe what it means to view something from a frame of reference.Give an example to illustrate your explanation.
like just try and try you gut it just trust me I'm a Wuman and you a man
If acceleration of a body starting from the rest is 0.5m/s^2 how long will it take the body to travel 400m(if u are genius answer this)
Answer:
pls I don't understand it
Explanation:
can you follow me pleaee??
how to find total internal reflection
(c) Total internal reflection occurs
when the incident angle is greater than the critical angle.
n1 sin θ1 = n2 sin θ2. n1 sin θ1 = n2.hope it helpsRefer to the following illustration to answer this question.
Waves
To measure one wavelength, you would measure the distance between __________.
Question 16 options:
D and B
C and A
A and B
C and F
Answer:
C and E
Explanation:
The wavelength of a transverse wave can be measured as the distance between two adjacent crests. The wavelength of a longitudinal wave can be measured as the distance between two adjacent compressions. Short-wavelength waves have more energy than long-wavelength waves of the same amplitude.
An object has an acceleration of 18.0 m/s/s. If the net force
was tripled and the mass were halved, then the new
acceleration would be m/s/s.
Answer:
Force = mass × acceleration
[tex]{ \boxed{ \rm{F = ma}}}[/tex]
• For the first case;
[tex]{ \tt{F = 18m}}[/tex]
• For the second case;
[tex]{ \tt{3F = \frac{1}{2} m \times a}} \\ \\ { \tt{F = \frac{1}{6}m \times \frac{1}{3}a }}[/tex]
Then equate the equations:
[tex]{ \tt{18m = \frac{1}{6} m \times \frac{1}{3}a }} \\ \\ { \tt{18 = \frac{1}{3} ( \frac{1}{2} \times a)}} \\ \\ { \tt{54 = \frac{a}{2} }} \\ \\ { \boxed{ \mathfrak{answer{ : \rm {a = 98 \: m {s}^{ - 1} }}}}}[/tex]
please help, 1 question, brainliest if you get it right! please only answer if you know.
thanks!
Answer:
the answer is b
Explanation:
the answer is b.
Answer:
b is the answer........*-*
Suppose you apply a force of 75 N to a 25-kg object. What will the acceleration of the object b? (Remember a=F/m)
25 m/s2
3 m/s²
225 m/s2
25N
k12 schools help me
I would choose the option B.
F = ma
a = 75 / 25 = 3 m/s^2
The acceleration of the given object will be equal to 3 m/s². Therefore, option (B) is correct.
What is acceleration?Acceleration of an object can be explained as the change in the velocity of an object with respect to time. The acceleration is a vector quantity as it exhibits magnitude and direction. Acceleration can be calculated from the 2nd derivative of the position of the object w.r.t. time.
The force is the product of the mass and acceleration, according to Newton's second law of motion.
F = ma
And, a = F/m
From the above formula, we ca say that the acceleration is inversely proportional to mass.
Given, the force acting on the object, F = 75 N
The mass of the object, m = 25.0 Kg
The acceleration of the given object, a = 75/25 =3 m/s²
Therefore, the acceleration of the object is equal to 3 m/s².
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What is the mass of the object if it has a density of 657 g/mL and a volume of 32 mL?
Show work!
Answer:
The answer is 21024g/mL
Explanation:
Multiply 657 by 32:
657
× 32
⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻
21024
↳ 21024 g/mL
The moon goes around the Earth at an approximately constant speed, but not at a constant velocity. What difference would it make if it went in a constant velocity? Why doesn't it do so?
