Answer:
Explanation:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. This postulate is known as the law of inertia.
hope this helps :))
There is no force acting on the baseball the statement best explains why the baseball remains motionless.
What is inertia?A body wants to remain in its original position until or unless the external force is not applied to it. Such a phenomenon is known as inertia.
Newton's first law asserts that if a body is at rest or traveling at a uniform speed in a straight direction,
It will remain at rest or continue to move in a straight path at a constant speed until acted on by a force. This is referred to as the law of inertia.
There is no force acting on the baseball the statement best explains why the baseball remains motionless.
Hence option B is correct.
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How far is it between the cafeteria and the swimming pool
A.
length
B.
volume
C.
distance
D.
displacement
A girl kicks a blue ball with a velocity of 20.0 m/s at 65.0o. How long is it in the air?
1.85s
1.92s
13.6s
3.69s
Explanation:
t = usin©/g
Where t is the time to reach the maximum height
Time spent in air is T = 2t
Hence, T = 2usin©/g
T = 2 x 20 x sin 65°/ 9.8
T = 3.69s
A sphere is released into the atmosphere where air resistance is present. As it falls it loses 7J of potential energy. How much kinetic energy did it gain?
Answer:
7 J
Explanation:
Given that,
A sphere is released into the atmosphere where air resistance is present.
The lose in energy is equal to 7 J
We need to find the gain in its kinetic energy.
We know that, as per the law of conservation of energy,
Loss in potential energy = gain in kinetic energy
⇒
Gain in kinetic energy = 7 J
Hence, the gain in kinetic energy is 7 J.
state and explain the disadvantages of anomalous expansion of water
Answer:
я не знаю старайся изо всех сил
Explanation:
[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]
[tex]\color{green}{\tt State \: and \: explain \: the \: disadvantages}[/tex]
[tex]\color{green}{\tt { of \: anomalous \: expansion \: of \: water}}[/tex]
[tex]\huge{\mathbb{\tt {ANSWER↓}}}[/tex]
[tex]{\boxed{\boxed{\tt { DISADVANTAGES \: of \: anomolous \: expansion \: of \: water }}}}[/tex]
Since the maximum density can be found for a positive temperature, water's own weight will prevent it from freezing from the bottom up. However, the anomalous expansion of water has some negative consequences. ... As the water freezes it expands and can rip pipes open.[tex]{\boxed{\boxed{\tt { What \: is \: the \: state \: of \: anomalous \: expansion \: of \: water? }}}}[/tex]
The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense. The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph#CarryOnLearning
#JustEnjoyTheSummer
→XxKim02xXAn aluminum rod is 300m and at 25 degree Celsius. Calculate the change in rod
length at 45 degree Celsius
Answer:
Explanation:
540
A car hits a wall with a force of 80 N and
has a mass of 4.5 kg. What was the
acceleration of the car?
Compare and contrast hydrogen fuel cell vehicles with vehicles that have intemal combustion engines.
A hydrogen fuel cell vehicle is different from internal combustion engine as in fuel cell, hydrogen combines with oxygen whereas in internal combustion engines, gasoline is used.
What are hydrogen fuel cell vehicles and internal combustion engines?
In a internal combustion engine or fuel cell vehicle, the hydrogen fuel is combined with oxygen atom. While the combustion in a hydrogen- fuel or in a gasoline-powered engine is converted into mechanical energy, however in the hydrogen fuel cell vehicle, the chemical energy from the hydrogen and oxygen is converted into electrical energy.
Both hydrogen internal combustion engines and the hydrogen fuel cells can power vehicles using hydrogen, a zero-carbon fuel. Hydrogen engines burn hydrogen gas in an internal combustion engine, in the same way as the gasoline is used in a power engine. Examples of hydrogen internal combustion engines include gasoline engines, diesel engines, gas-turbine engines, and rocket-propulsion systems.
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An object has a weight of 1550N when it is on the surface of a planet of radius R. What will be the gravitational force on the object after it has been moved to a distance of 4R from the surface of the planet?
Answer:
W = 96.875 N
Explanation:
For this exercise let's use the law of universal gravitation
F = [tex]G \frac{m M }{r^2}[/tex]
we substitute this force in Newton's second law
F = m a
G \frac{m M }{r^2} = m a
a = [tex]G \frac{M}{r^2}[/tex]
This sidewalk we will call it gravity acceleration
g₀ = a
the weight of a body is
W₀ = m g₀
if we change the cario of r ’= 4r
a’= [tex]G \frac{M}{r'^2 }[/tex]
a ’= G \frac{M}{(4r)^2 }
a' = [tex]G \frac{M}{r^2} \ \frac{1}{16}[/tex]
a ’= [tex]\frac{g_o}{16}[/tex]
therefore the weight of the body must be
W = m g = [tex]m \ \frac{g_o}{16}[/tex]
W = W₀ / 16
W = 1550/16
W = 96.875 N
Three people push a piano on wheels with forces of 130 N to the right, 150 N to the left, and 165 N to the right. What is the strength and direction of the net force on the piano?
Answer:
45 N to the right possibly?
Auntie Sarah mops the floor by applying a force of 9N at an angle of 60° to the floor, How much work has she done
after mopping a total distance of 10m?
Answer:
9×1/2×10=45J
Explanation:
[tex]w = f \times d \times \cot( \beta ) [/tex]
f=9N
d=10m
cos(B)=1/2
What is the transfer of energy from a wave to the medium through which travels
Answer:
'Wave' is a common term for a number of different ways in which energy is transferred: In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels.
Calculate the momentum elephant of a 2020 kg elephant charging a hunter at a speed of 7.49 m/s .
Answer:
15129.8 Kg•m/s
Explanation:
From the question given above, the following data were obtained:
Mass = 2020 kg
Velocity = 7.49 m/s
Momentum =?
Momentum is simply defined as the product of mass and velocity. Mathematically, it is expressed as:
Momentum = mass × velocity
With the above formula, we can obtain the momentum of the Elephant as follow:
Mass = 2020 kg
Velocity = 7.49 m/s
Momentum =?
Momentum = mass × velocity
Momentum = 2020 × 7.49
Momentum = 15129.8 Kg•m/s
Thus, the momentum of the Elephant is 15129.8 Kg•m/s
The three main stages to the memory process are encoding, storage, and retrieval.
A.True B.False
Answer:
A
Explanation:
Answer:
a- true
Explanation:
i did the test and its correct
What is the equivalent of 0° C in Kelvin?
Help will give brainiest
Answer:
273.15 dat is the answer im pretty sure
PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST The actual subject is Science but they dont have that as a option in pick a subject
Answer:
I believe it is D. Based on the point and it being Position vs. time I believe D makes the most sense. Sorry if I am wrong!
Explanation:
Answer:
25/30 = 0.83
Explanation:
I took this class
A car travels 9 km East, turns around, then travels 3 km West. What is the car's
DISPLACEMENT? *
Explanation:
I think you are 100℅ clear.
This graph shows the energy of a reaction over time. Which statement is
true?
A. H represents the energy of the products.
B. G represents the activation energy.
C. G represents the energy of the products.
D. F represents the activation energy
Answer: D.
Explanation: Just took the quiz.
Answer:
D. F represents the activation energy
Explanation:
which lens have plus power
Answer:
Explanation:
A plus lens which is convex in shape, converges light and the accommodative system must relax in order to keep an image clear.
Which of the waves has the smallest amplitude?
A. The blue wave
B. The orange wave
C. The green wave
D. The red wave
Answer:
I think its the Blue wave, im not sure so dont take my word for it.
Explanation:
Answer: it’s the green wave
Explanation: trust me bro
A 100 L ball is blown up inside at 200K. It is then taken outside in the hot sun, and the volume increases to 150 L. What is the new temperature?
Answer:
Temperature, T2 = 300 Kelvin
Explanation:
Given the following data;
Initial volume = 100 Liters
Initial temperature = 200 Kelvin
Final volume = 150 Liters
To find the final temperature T2, we would use Charles' law.
Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.
Mathematically, Charles is given by;
[tex] \frac {V}{T} = K[/tex]
[tex] \frac{V1}{T1} = \frac{V2}{T2}[/tex]
Making T2 as the subject formula, we have;
[tex] T_{2}= \frac{V_{2}}{V_{1}} * T_{1}[/tex]
Substituting into the formula, we have;
[tex] T_{2}= \frac{150}{100} * 200[/tex]
[tex] T_{2}= 1.5 * 200 [/tex]
Temperature, T2 = 300 Kelvin
I have an unknown volume of gas at a pressure of 0.500 atm and a temperature of 325 K. If I raise the pressure to 1.20 atm, decrease the temperature to 320. K, and measure the final volume to be 48.0 liters, what was the initial volume of the gas?
Answer:
117
Explanation:
the formula is P1V1 over T1 is equals to P2V2 over T2
HELP pleaseee which nucleus completes the following equation?
Answer:
its D
Explanation:
i just got it correct on a. p. e. x. :)
The tendency of an object to resist a change in motion is called ___________________
a.
displacement
c.
momentum
b.
inertia
d.
acceleration
the tendency of an object to resist a change in motion is called inertia
How does radiation occurs on earth or in space?
Answer:
Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.
Explanation:
neeeeeeddddddssssshelp
Answer:
valence
Explanation:
how slow would a 60,000 kg freight car have to roll to have the same momentum as an 80 kg person running 6.5 m/s
(8 and 2/3) millimeters per second.
That's about 0.02 mile per hour.
The equation below shows a general equation for a reaction, and the amounts of the substance are written underneath.
AB + CD → AC + BD
(15 g) (?) (?) (10 g)
The total mass of the products is 50g. Which best completes the other two amounts?
The amount of CD is 40 g, and the amount of AC is 35 g.
The amount of CD is 35 g, and the amount of AC is 40 g.
The amount of CD and AC would be the same.
The amount of CD and AC is undetermined.
Explanation:
The amount of CD is 35 g, and the amount of AC is 40 g.
Explanation:
AB + CD \rightarrow AC + BDAB+CD→AC+BD
The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.
In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:
The amount of CD is 35 g, and the amount of AC is 40 g.
In fact, if we assume these masses are correct, we have:
- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g
- on the product side: m(AC)+m(BD)= 40g + 10g = 50g
so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.
Answer:
B is the answer on edge
Explanation:
B: The amount of CD is 35 g, and the amount of AC is 40 g.
A 12.0 volt battery is connected in a series to 4 identical 5.00 ohm resistors connected in parallel to each other. What is the current through the battery?
Answer:
9.6 Amperes
Explanation:
since the resistors are connected in parallel connection the equivalent resistance is1/R = 1 /5 + 1/5 + 1/5 + 1/5
solving for R we get 5/4 ohms
then from V=IR
I = V/R
I=12/(5/4)
hence I= 9.6 Amperes
A 12.0-volt battery is connected in a series, then the current through the battery is 9.6 A.
What are Resistors?Electrical resistance is implemented as a circuit element by resistors, which are passive two-terminal electrical components. Resistors are devices that are used in electronic circuits for a variety of purposes, including lowering current flow, adjusting signal levels, dividing voltages, biasing active components, and terminating transmission lines.
As part of motor controllers, power distribution systems, or as test loads for generators, high-power resistors that can dissipate many watts of electrical energy as heat may be used.
According to the question,
1/R = 1 /5 + 1/5 + 1/5 + 1/5
R = 5/4 ohms
By ohm's law,
V=IR
I = V/R
I=12/(5/4)
I= 9.6 Amperes
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Question 6 of 10
If this vector were twice as long, what would be the coordinates of the tip?
O A. (1,-2)
O B. (-2, 1)
O C. (-4,2)
D. (2,-4)
PREVIOUS
En las olimpiadas del 2012 del colegio villapalos maria gano la carrera de los 100 m en 10,56 s y la de 200 m en 22,34 s ¿en cual fue mas veloz
Answer:
Fue mas velóz en los 100 m.
[tex]v_{1}=9.47\: m/s[/tex]
Explanation:
Tomando en cuanta que la definición de velocidad es:
[tex]v=\frac{\Delta x}{t}[/tex]
Donde:
Δx es el desplazamientot es el tiempoLa primera velodcidad esta dada por:
[tex]v_{1}=\frac{100}{10.56}[/tex]
[tex]v_{1}=9.47\: m/s[/tex]
La segunda velocidad sera:
[tex]v_{1}=\frac{200}{22.34}[/tex]
[tex]v_{1}=8.95\: m/s[/tex]
Por lo tanto, en el primer tramo fue más rápido.
Espero te haya ayudado!