You should always wear your seatbelt just in case the car comes to an abrupt stop. The seatbelt will hold you in place so that your body does not continue moving when the car stops.
What property of matter will keep your body in motion when the car comes to a halt?
Group of answer choices
inertia
mass
force
acceleration
Answer:
inertia
Explanation:
The property of matter that will keep the body in motion when the car comes to a halt is the inertia force.
Inertia is the ability of a body to remain in static position. It is the tendency to remain in a stable condition where there is no motion.
Newton's first law is the law of inertia and it states that a body remain in a state of rest or of uniform motion unless acted upon by an external force. The ability to remain in state of rest by a body is predicated on the force of inertia.Answer:
inertia
first
Explanation
Why are some of the rocks on the moon older than the oldest known rocks on Earth?
Select the correct answer. The formula for calculating power is work divided by time (power = work ÷ time). What are two ways of stating the same relationship? work = power ÷ time work = power × time time = work ÷ power time = work × power power = work × time
Answer:
work = power × time
time = work ÷ power
Explanation:
Power is defined as the rate at which work is done.
It is mathematically expressed as;
Power = [tex]\frac{work}{time}[/tex]
From this expression, if we cross multiply, we get;
work = power x time
Also, if we divide both sides by power, we get;
time = work ÷ power
look at photo please i really need help
Answer:
G. 10N left
Explanation:
Because more newtons are being pulled to the right and there is 10 more then the left side so the extra 10N are going to be pulled to the right
What does properties mean
Answer:
a thing or things belonging to someone; possessions collectively.
Explanation:
What type of objects exert gravitational pull? (5 points) Only living objects Only space objects All objects having mass All substances that are visible
Answer:
Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects. You exert a gravitational force on the people around you, but that force isn't very strong, since people aren't very massive.
Answer:
All objects having mass
Explanation:
What the other guy said
also I took the test!
The compound cyanogen (CN)2 has covalent bonds shown in this diagram. Starting at left, an N connected by three lines, one above the other, to a C connected by one line to a C connected by three lines, one above the other, to an N. How many electrons are shared between one nitrogen atom and one carbon atom? two three six seven
Answer:
C For a 100% fact!!!! :)
Answer:
I did C on edge and got this correct sooo
Explanation:
A student drops a 0.4kg ball from a height a of 49m above the ground. Neglect drag. Answer each of the following questions about the ball during the flight.
What is the magnitude of the net force on the ball?
What is the magnitude of the ball's acceleration?
How long does the ball take to hit the ground?
What is the ball's speed just before striking the ground?
• The only force acting on the ball, and thus the net force, is due to its own weight, with magnitude
w = m g = (0.4 kg) (9.8 m/s²) ≈ 3.9 N
pointing downward.
• The ball is in free fall, so its acceleration is g = 9.8 m/s² (also pointing downward).
• The ball is dropped from a height of 49 m, so its height y at time t is
y = 49 m - 1/2 g t ²
Set y = 0 and solve for t :
0 = 49 m - 1/2 g t ²
t ² = (98 m) / g
t = √((98 m) / g) = √(10) s ≈ 3.2 s
• The ball's velocity v at time t is
v = - g t
so that at the time found previously, the ball will have attained a velocity of
v = - g (3.2 s) ≈ -31 m/s
and thus a speed of about 31 m/s.
Which characteristic does inertia describe
Answer:
Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.
Explanation:
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Answer:- how difficult it is to change an object's motion
Explanation:
Hope I Helped No Need For Brainliest! :)
Is it ok for some help pwease?
What is the area of calm winds near the equator called?
doldrums
polar easterlies
trade winds
horse latitudes
Answer:
doldrums
Explanation:
Just need to type something more to be able to post
A closely wound search coil has an area of 3.13 cm2, 135 turns, and a resistance of 61.1 Ω. It is connected to a charge-measuring instrument whose resistance is 44.4 Ω. When the coil is rotated quickly from a position parallel to a uniform magnetic field to one perpendicular to the field, the instrument indicates a charge of 3.44×10−5 C . What is the magnitude of the magnetic field?
Answer:
Explanation:
Let the magnitude of magnetic field be B .
flux passing through the coil's = area of coil x field x no of turns
Φ = 3.13 x 10⁻⁴ x B x 135 = 422.55 x 10⁻⁴ B .
emf induced = dΦ / dt , Φ is magnetic flux.
current i = dΦ /dt x 1/R
charge through the coil = ∫ i dt
= ∫ dΦ /dt x 1/R dt
= 1 / R ∫ dΦ
= Φ / R
Total resistance R = 61.1 + 44.4 = 105.5 ohm .
3.44 x 10⁻⁵ = 422.55 x 10⁻⁴ B / 105.5
B = 3.44 x 10⁻⁵ x 105.5 / 422.55 x 10⁻⁴
= .86 x 10⁻¹
= .086 T .
the sputnik 1 satellite orbited earth (mass=5.98 x 10^24 kg) in a circle of radius 6.96 x 10^6 m. what was its orbital velocity?
Answer:
v = 4.79 10³ m / s
Explanation:
For this exercise we will use the universal law of gravitation and Newton's second law
F = G M m / r²
where G is the gravitational constant, m the mass of the satellite, M the mass of the Earth, r the distance from the center of the planet to the satellite
F = m a
since the satellite has a circular path, the acceleration is centripetal
a = v² / r
we substitute
G M m / r² = m v² / r
G M / r = v²
We calculate
v² = 6.67 10⁻¹¹ 5.98 10²⁴ / 6.96 10⁶
v = √ (22.94 10⁶)
v = 4.79 10³ m / s
Answer:
7570 m/s
Explanation:
take the square root of: 6.67E-11× 5.98E24/6.96E6
Joseph remembers reading that for a particular pressure, P1, there is a maximum height to which a fluid can rise. He reasons that in this case the pressure (P2) must drop to zero so that the water can no longer flow to increased heights. He decides to check if the simulation can be made to demonstrate such conditions. He decides to make A2 as small as possible in the simulation (2.2 cm2) so that he increases the speed of the fluid in tube 2 as high as is possible (he decides to do this after examining the continuity equation). He then calculates the height of the fluid under these conditions where the pressure would fall to zero so that the fluid could no longer be made to flow under the conditions set up in the simulation. He then runs the simulation under the largest Δy allowed to check his calculation. What does Joseph calculate for the maximum height?
Answer:
h = P₁ / 9800
Explanation:
This is a fluid mechanics problem, let's write the Bernoulli equation at two points, the subscript 1 for the lowest point and the subscript of 2 for the point with the highest height.
P₁ + ½ ρ v₁² + ρ g y₁ = P₂ + ½ ρ v₂² + ρ g y₂
at the highest point P₂ = 0 and v₂ = 0,
P1 + ½ ρ v12 = ρ g (y₂ -y₁)
we use the continuity equation for the velocity at the lowest point
A₁ v₁ = A₂ v₂
Since the velocity at the highest point is zero, this implies from the equation that the velocity at the lowest point is also zero. In the no-flow condition
P₁ = ρ g (y₂ -y₁)
h = y₂-y₁
h = P₁ /ρ g
the density of water is ρ = 1000 kg / m³ and g = 9.8 m/s², we substitute
h = P₁ / 9800
Let's do a calculation, suppose that P₁ = 1 10⁵ Pa
h = 1 10⁵ / 9800
h = 10.2 m
The slope on a velocity vs time graph is the _______ of the object.Required to answer. Single choice.
Answer:
the slope of the line on a velocity versus time graph is equal to the acceleration of the object ctto google
A certain body is thrown at an angle of 30° to the horizontal with a speed of 20m/s. What is the time the body takes to reach the maximum height?
Answer: here is my answer
Explanation: Note also that the maximum height depends only on the vertical component of the initial velocity, so that any projectile with a 67.6 m/s initial vertical component of velocity will reach a maximum height of 233 m (neglecting air resistance)
7. An airplane travels 4988.966 Km in 57 minutes. Calculate the average speed in
km/sec.
Answer:
wow easy
Explanation:
an object is dropped from a 145 m ledge. How fast it is moving just before it hits the ground
Seeing light coming out from a crack in the wall is what type of wave interaction?
A. Reflection
B. Refraction
C. Diffraction
D. Resonance
Answer:
C
becuase its where a wave (light etc) goes through a narrow area or across an edge of an area
what's the difference mass and weight
Answer:
Mass doesn't change.
Weight is measured based on gravitational pull.
Explanation:
Convert 15° C to fahrenheit and kelvin
Answer:
59 degrees fahrenheit and 288.15 kelvin
Explanation:
Answer:
59 oF and 288 K
Explanation:
oF= 15 x 1.8 + 32= 59
K= 15+273 = 288
Momentum:
3
Mass A has a mass of 10 kg while mass B has a mass of 20
kg. Which of these must be true?
Answer:
D
Explanation:
F=ma
a=F/m
according to option D, F is constant
so acceleration is inversely proportional to mass and A has half the mass of B. Hence, acceleration of A will be twice of B if same force is applied.
The articles of confederation represented the Americans distrust of what form of government?
Answer: The Articles of Confederation were against having a strong central government.
Explanation:
What will happen if the birth and death rate increased?
Answer:
To know what will happen we first need to know if the birth rate is more or if the death rate is more if the birth rate had a sudden increases above the death rate we would likely face population problems on the other hand if the death rate is increased more than the birth rate we would have less population problems and more food and resources but if the birth and death rate were to increase equally there would just be a standstill in the population
Explanation:
A student spots an unknown sample on a TLC plate. After developing in hexanes/ethyl acetate 50:50, he/she saw a single spot with an Rf of 0.55. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?
Answer:
See explanation
Explanation:
A pure sample is known to give one spot on a chromatogram. This is the first indication that the substance is a pure substance. Since the student saw a single spot, the unknown substance is pure.
Subsequently, the substance can be boiled since it is a liquid. Impure substances boil over a range of temperatures. If the substance is pure, it will have a sharp boiling point which can be compared with boiling points of known substances recorded in literature hence the substance can be correctly identified.
The given unknown material or compound is a pure compound - yes, it has only one spot.
In the given TLC plate there is only one single spot found thus we can say it is the pure compound as If an impurity is present along with the major compound then there we could observe more spots other than the major compound.
The verification of the purity of the sample can be tested by a general procedure
conduct the TLC of the given compound and a separate TLC consisting of the pure compoundcompare the Rf values of both platesif it matches with the Rf value of the pure compound then the given compound is confirmed. the TLC plate has no spots other than the main compound therefore, it is a pure one.Thus, The given unknown material or compound is a pure compound - yes, it has only one spot.
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CAN SOMEONE HELP ME? thank you :)
According to peacemaking criminology, toward which option should a country redirect the money it currently spends on imprisoning criminals?
A.
nuclear technology
B.
stock market
C.
environmental campaigns
D.
private organizations
Answer:
Explanation:
It is C. Environmental campaigns
Answer: environmental campaigns
Explanation:
got it right on the test
A top sprinter reached his maximum instantaneous velocity of 12.28 meters per second 7.17 seconds after leaving the blocks. Calculate his acceleration. All key steps must be shown.
I am very confused will you please help me!!
Answer:
Here we will assume two things.
His acceleration is constant until he reaches his maximum velocity and then he stops accelerating.
When he leaves the blocks, his velocity is "zero", meaning that the initial velocity is zero.
Then:
For the acceleration of the sprinter we will have a constant, A:
a(t) = A.
for the velocity we need to integrate over time, we will get
v(t) = A*t + v0
Where v0 is a constant of integration, and this is the initial velocity, as we already said, this will be zero, so the velocity equation is:
v(t) = A*t
We know that at t = 7.17 seconds, his velocity is 12.28m/s
then:
v(7.17s) = 12.28m/s = A*7.17s
12.28m/s/7.17s = 1.71 m/s^2 = A.
The acceleration is: 1.71 m/s^2 for 0 < t < 7.17s
0 m/s^2 for 7.17s < t.
This is because that was his maximum velocity, then after that time he can not accelerate more.
1) Do liquids and gases also exert pressure?
Explanation:
Liquids also exert pressure in all directions on the walls of the container they are stored in. We see water coming out from leaking pipes and taps. ... Gases (Air) also exert pressure in all directions
The charge of an atom is......?
Which of the following best describes the type of bond formed when sodium reacts with chlorine?
Answer: ionic bond
Explanation: This type of chemical bond is called an ionic bond because the bond formed between two ions of opposite charge.
