Select the correct answer from each drop-down menu. Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. Complete the passage summarizing the collision. On colliding, the truck applies a force on the stationary car, and the stationary car applies and opposite force on the truck. The front of the truck is designed to crumple in order to , which protects the well-being of the passengers.
On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact of the collision, which protects the well-being of the passengers.
What is motion physics
Answer:
B) A change in the position of an object with respect to a reference pointExplanation:
Motion, in physics, change with time of the position or orientation of a body. Motion along a line or a curve is called translation.Which part of the brain is responsible for laying down new memories
Answer:
The Answer is hippocampus.Explanation:
I hoped it's helpful to you . mark this answer as BRAINLIEST answer. Thank you ☺️Four kilograms of carbon monoxide (CO) is contained in a rigid tank with a volume of 1 m^3. The tank is fitted with a paddle wheel that transfers energy to the CO at a constant rate of 14 W for 1 h. During the process, the specific internal energy of the carbon monoxide increases by 10 kJ/kg. If no overall changes in kinetic and potential energy occur,
determine:
a. the specific volume at the final state;
b. the energy transfer by work;
c. the energy transfer by heat transfer, and the direction of the heat transfer.
Answer:
(a). The specific volume at the final state is 0.25 m³/kg.
(b). The energy transfer by work is 50.4 kJ.
(c). The energy transfer by heat is -10.4 kJ.
Negative sign shows the direction of heat
Explanation:
Given that,
Weight of carbon monoxide = 4 kg
Volume of tank = 1 m³
Constant rate of 14W for 1 hour
The specific internal energy of the carbon monoxide increases by 10 kJ/kg.
(a). We need to calculate the specific volume at the final state
Using formula of specific volume
[tex]V'=\dfrac{V}{m}[/tex]
Put the value into the formula
[tex]V'=\dfrac{1}{4}[/tex]
[tex]V'=0.25\ m^3/kg[/tex]
(b). We need to calculate the energy transfer by work
Using formula of work
[tex]W=Pt[/tex]
Where, P = power
t = time
Put the value into the formula
[tex]W=14\times1\times3600[/tex]
[tex]W=50.4\ kJ[/tex]
(c). The energy transfer by heat transfer, and the direction of the heat transfer
We need to calculate the [tex]\Delta U[/tex]
Using formula of internal energy
[tex]\Delta U=m\Delta u[/tex]
Put the value into the formula
[tex]\Delta U=4\times10[/tex]
[tex]\Delta U=40\ kJ[/tex]
We need to calculate the energy transfer by heat
Using formula of energy transfer
[tex]Q=\Delta U-W[/tex]
Put the value into the formula
[tex]Q=40-50.4[/tex]
[tex]Q=-10.4\ kJ[/tex]
Negative sign shows the direction of heat that is removed from CO.
Hence, (a). The specific volume at the final state is 0.25 m³/kg.
(b). The energy transfer by work is 50.4 kJ.
(c). The energy transfer by heat is -10.4 kJ.
Negative sign shows the direction of heat.
A car is traveling at 114 m/s and changes its velocity to 77 m/s in 9 sec.
What is the car's acceleration?
Answer:
Given -
Initial Velocity, u = 114 m/sFinal velocity, v = 77 m/s.Time taken, t = 9 sec.To find -
Acceleration of the car.Solution -
Here, using the equation of motion v = u + at we can find the acceleration easily.
★ Here,
V = Final velocityU = Initial VelocityA = AccelerationT = Time.Substituting the values -
→ 77 = 114 + a(9)
→ 9a = 114 - 77
→ 9a = 37
→ a = 37/9
→ a = 4.1 m/s
Therefore, the acceleration of the car will be 4.1 m/s.
18. A cup contains hot liquid. Some of the liquid evaporates.
What happens to the mass and what happens to the weight of the liquid in the cup?
(1 Point)
Mass Weight
A decreases decreases
B decreases stays the same
C stays the same decreases
D stays the same stays the same
A tiger runs at 58 km/h [S]. What is the displacement of the tiger in 38 s?
pLEASE HURRY !!! ILL GIVE BRAINLIEST!!!!!!!!!!!!!
Give one hazard caused by electrostatic charges and state how the risk from this hazard can be reduced
One hazard that can be caused by electrostatic charge is : Electrical equipment damage and it can be reduced by proper earthing of a building
what are electroststic charges ?
Electrostatic charges are electrical charges at rest. They are produced when two bodies rub against each other( contact) or when a naturally charged body comes close to an uncharged body( induction). these charges are mostly felt when there is lightning and thunderstorms.
Buildings are normally designed with spikes are the top of the roof. these spikes attract charges and direct them to the earth, where they are neutralized. so that the effect of lighting is not felt.
In conclusion, electrical discharges cause damages to electrical equipment like televisions. The risk from this hazard can be reduced by proper earthing of the building.
Learn more about electrostatic charges : https://brainly.com/question/17692887
#SPJ2
give four example of fluid statics
Answer:
See the explanation below
Explanation:
First example
The water contained in a lake or tank is in equilibrium there is no movement of the fluid and the water exerts pressure on the bottom of the tank or lake.
Second example
A floating buoy that is on the high seas, the buoy is in static equilibrium and these developed forces allow the buoy not to sink.
Third example
A hydraulic press which uses the principle of pascal and the mechanical advantage due to the relation of areas, where applying a smaller force, you can obtain a much greater force, communicating the energy through a fluid such as oil.
Fourth Example
The atmospheric pressure, which depends on the height of a place above sea level, in this case the fluid is the air. Although the air cannot be seen, it exerts a pressure column on the bodies on the Earth's surface.
When the automobile moves away from the listener, its horn seems
a. Low pitched (low frequency) b. High Pitched (high frequency)
c. Normal (no change in frequency)
Answer:
The exact opposite of the other question! This one's Low pitched (a)
Explanation:
See the explanation for the other question xD
Einstein’s theory of general relativity was published in 1916 it became fully accepted by scientists in the 1960s and is currently the best explanation of gravity, ignore c filled in
Answer:
It is C
Explanation:
i just answered it on apex
Answer:
C. More evidence needed to be gathered to validate the ideas in the theory.
Explanation:
A P E X
Which statement is the contrapositive of:
If two angles are vertical angles, then they are not adjacent angles.
A.If two angles are not adjacent angles, then they are vertical angles.
B.If two angles are not vertical angles, then they are adjacent angles.
C.If two angles are not vertical angles, then they are not adjacent angles.
D.If two angles are adjacent angles, then they are not vertical angles.
E.Two angles are vertical angles if, and only if, they are not adjacent angles.
Answer:
E.two angles are vertical angles if, and only if they are not adjacent angles
which of the following is a characteristic of tennis
Some machines do not multiply the force that is applied to them. Question 20 options: True False
Explanation:
it is true that some machines do not multiply the force that is applied on them
Two point charges, with charge magnitudes q and ????, are placed a distance r apart. In this arrangement, each point charge experiences a force of magnitude F. In the three scenarios, q, ????, and r are changed to some multiple of their original values. In each case, fill in the missing value on one of the variables that will result in a force between the point charges that is equal in magnitude to the original F.
Original q Q r
Scenario 1 2q ...Q 4r
Scenario 2 ...q 2Q (1/2)r
Scenario 3 (3/2)q (3/8)Q ...r
Answer:
1) Q ’= 8 Q , 2) q ’= 16 q , 3) r ’= ¾ r
Explanation:
For this exercise we will use Coulomb's law
F = k q Q / r²
It asks us to calculate the change of any of the parameters so that the force is always F
Original values
q, Q, r
Scenario 1
q ’= 2q
r ’= 4r
F = k q ’Q’ / r’²
we substitute
F = k 2q Q ’/ (4r)²
F = k 2q Q '/ 16r²
we substitute the value of F
k q Q / r² = k q Q '/ 8r²
Q ’= 8 Q
Scenario 2
Q ’= Q
r ’= 4r
we substitute
F = k q ’Q / 16r²
k q Q / r² = k q’ Q / 16 r²
q ’= 16 q
Scenario 3
q ’= 3/2 q
Q ’= ⅜ Q
we substitute
k q Q r² = k (3/2 q) (⅜ Q) / r’²
r’² = 9/16 r²
r ’= ¾ r
How can we show that air can do work?
Air can do work when it exerts a force on an object and causes it to undergo displacement. The ability of air to do work is evident in various phenomena, such as wind pushing sails, fans moving objects, and air pressure powering pneumatic systems.
Air can do work through its ability to exert a force over a distance. Work is defined as the transfer of energy that occurs when a force is applied to an object and it undergoes displacement in the direction of the force. When air is in motion, it possesses kinetic energy and can exert a force on objects in its path, thus performing work.
To understand how air can do work, we can consider the example of a moving fan. When a fan is turned on, the blades start to rotate, creating a flow of air. As the air moves, it carries kinetic energy. When the moving air encounters an object, such as a piece of paper, the air molecules collide with the paper's surface and exert a force on it. This force causes the paper to move and displaces it from its initial position.
The work done by the air can be calculated using the equation:
Work = Force * Distance * cos(θ)
Where Force is the magnitude of the force exerted by the air, Distance is the displacement of the object, and θ is the angle between the direction of the force and the displacement.
In the case of air doing work on an object, the force exerted by the air is perpendicular to the direction of motion, resulting in θ = 90 degrees. Since cos(90) = 0, the equation simplifies to:
Work = Force * Distance * 0
Therefore, the work done by the air on the object is zero when the force exerted by the air is perpendicular to the displacement.
However, if the force exerted by the air is not perpendicular to the displacement, such as when blowing air at an angle to move an object, then work is performed. The air exerts a force on the object and causes it to move in the direction of the force, resulting in the transfer of energy.
For more such information on: work
https://brainly.com/question/25573309
#SPJ8
23. Two states of matter are described as follows.
In state 1. the molecules are very far apart. They move about very quickly at random in straight lines
they hit something.
until
In state 2, the molecules are quite closely packed together. They move about at random. They do not have
fixed positions
What is state 1 and what is state 2?*
(1 Point)
State 1 state 2
A solid liquid
B gas solid
Cliquid gas
D gas liquid
Answer:
D gas liquid
Explanation:
The states of matter in 1 and 2 are the gas and liquid phases.
State 1; the molecules are very far apart. They move about quickly at random straight lines.
This is an attribute of a gas. The particles or molecules of gases are very far apart. They are held together by very weak attractive forces. Gases are compressibleExamples are carbon(iv) oxide, oxygen gasState 2: the molecules are quite closely packed together. They move about at random. They do not have fixed positions.
Liquids are held by much stronger attractive forces. Their molecules are closer to each other. They generally flowThey are partially compressible.Solids are the most closely held together by very strong attractive forces. Their molecules have fixed position.
Therefore, State 1 is gas and State 2 is liquid.
IF A = (10i -16j) m/s B = (3i + 8j) m/s C = (6i + 20j) m/s determine a and b Such that aA + bB + C=0
The value of a and b is 2.7 and -2.9 respectively.
The vectors A, B, and C can be represented as:
A = 10i - 16j m/s
B = 3i + 8j m/s
C = 6i + 20j m/s
The equation and equate the coefficients of the 'i' and 'j' terms on both sides:
ai + 3bi + 6 = 0 (for the 'i' component)
-16aj + 8bj + 20 = 0 (for the 'j' component)
From the first equation:
a + 3b = -6 (equation 1)
From the second equation:
-16a + 8b = -20 (equation 2)
Multiply equation 1 by 8 and equation 2 by 3 to eliminate 'b':
8a + 24b = -48 (equation 3)
-48a + 24b = -60 (equation 4)
Adding equation 3 and equation 4 eliminates 'b':
8a + 24b + (-48a + 24b) = -48 + (-60)
-40a = -108
a = -108 / -40
a = 2.7
Substituting the value of 'a' into equation 1:
2.7 + 3b = -6
3b = -6 - 2.7
3b = -8.7
b = -8.7 / 3
b = -2.9
Therefore, 'a' is 2.7, and 'b' is -2.9, such that aA + bB + C = 0.
For more such questions on vectors:
https://brainly.com/question/25811261
#SPJ8
If a ball is given an acceleration of 3.0 meters/second while be pushed with a force of 0.75 Newton’s, what is the mass of the ball?
Answer:
The answer is 0.25 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
We have
[tex]m = \frac{0.75}{3} \\ [/tex]
We have the final answer as
0.25 kgHope this helps you
Gases have a definite shape and volume. O A. True O B. False
Answer:
FALSE
Explanation:
The ossicles (the three tiny bones in the middle ear) are responsible for __________.
A.
converting sound vibrations into neural signals
B.
relaying sound vibrations to the eardrum
C.
vibrating in response to sound waves
D.
amplifying sound vibrations from the eardrum
Answer:
D.amplifying sound vibrations from the eardrum
this is correct
Answer:
D.amplifying sound vibrations from the eardrum
Explanation:
right on edge
True or false. cones are sensitive to bright light.
Answer:
false
Explanation:
they r not as sensitive as the rods
match the properties with the subatomic particles
an inductive argument can be strong without being cogent
True
False
Answer:
False
Explanation:
Google said
If an inductive argument is strong, then it must also be cogent.
Use the information below to answer the question(s) that follow(s) A student filled three beakers, each with 50 milliliters of liquid wafer. The student cooled Beaker 1 to form ice. The student heated Beaker 2 to form wafer vapor (gas). Beaker 3 remained at room temperature. The student removed Beaker 1 from the freezer the next day. When the student turned the beaker over, a block of ice fell out and broke into small pieces. Which statement describes the relationship between the mass of the block of ice and the mass of the small pieces of ice? *
4 points
A The mass of the block of ice was slightly greater because some of the small pieces melted.
B The mass of the block of ice was less than the total mass of the smaller pieces of ice.
C The mass of the block of ice was equal to the total mass of the smaller pieces of ice.
D The mass of the block of ice was greater than the total mass of the smaller pieces of ice.
When can thermal energy in a system move from lower to higher temperatures?
Answer:
When the object in creases or decreases in temperature.
Explanation:
Heat flow moves energy from a higher temperature to a lower temperature. The bigger the difference in temperature between two objects, the faster heat flows between them. When temperatures are the same there is no change in energy due to heat flow. Radiation and Conduction are the two methods of heat transfer..
Arthur made a labeling the diagram of the three stages of the cell cycle.
What is the error in the diagram
answer;aExplanation:
In a tug-of-war game on one campus, 15 students pull on a rope at both ends in an effort to displace the central knot to one side or the other. Two students pull with force 190 N each to the right, four students pull with force 92 N each to the left, five students pull with force 64 N each to the left, three students pull with force 158 N each to the right, and one student pulls with force 260 N to the left. Assuming the positive direction to the right, express the net pull on the knot in terms of the unit vector. How big is the net pull on the knot? In what direction?
Answer:
94N to the left
Explanation:
Net force will be the net pull on the knot
Net force = Sum of Direction of force towards the right - Sum of Direction of force towards the left.
For direction of force towards the right:
Two students pull with force 190 N = 2(190) = 380N
Three students pull with force 158 N each to the right = 3(158) = 474N
Total sum of force towards the right = 380N+474N = 854N
For direction of force towards the left:
four students pull with force 92 N each to the left = 4(92) = 368N
Five students pull with force 64 N each to the left = 5(64) = 320N
One student pulls with force 260 N to the left = 1(260) = 260N
Total sun for forces towards the left = 368N+320N+260N = 948N
Net force = 854N - 948N
Net force = -94N
Hence the net pull on the knot is -94N
The net pull on the knot is 94N (Its magnitude) to the left (due to the negative value we arrived at)
Which has more energy, a photon of ultraviolet radiation or a photon of yellow light?
Answer:
The ultraviolet light has more energy
Explanation:
