Answer:
0 m/s²
Explanation:
Acceleration is defined as the rate of change of velocity:
[tex]acceleration = \frac{change \space\ in \space\ velocity}{time taken}[/tex] .
As the velocity is constant, change in velocity = 0.
∴ acceleration = 0/ 10
= 0 m/s²
What is a specific heat capacity?
Answer:
C.
Explanation:
Specific heat capacity is defined as the amount of heat energy needed to increase the temperature of 1kg of a substance by 1°C.
The formula for specific heat capacity is as follows:
[tex]C = \frac{Q}{m \Delta T}[/tex]
where:
C → specific heat capacity
Q → heat energy required
m → mass of the object
ΔT → change in temperature.
what is the magnification of a mirror that
Answer:
1.1111111
Explanation:
The formula for magnification (M) as already given is:
M= V/U
Where V is anything that has to do with image . such as image height or image distance And U is anything that has to do with object such as object height or object distance .
Image height (V) = 2m
Object height(U) = 1.8m
M = V/U
M= 2/1.8
M= 1.111111
A simulation shows whether changing various weather conditions increases
the likelihood that a hurricane will form. which type of model is this?
a. it is physical.
b. it is computer-generated.
c. it is mathematical.
d. it is conceptual.
Answer:I don’t know
Explanation:
i don’t know
A book with a mass of 1.2 kg sits on a bookshelf. if it has a gravitational potential energy of 50 j, how high is the shelf? the acceleration of gravity is 9.8m/s^2
Answer:
h = 4.25 m
Explanation:
[tex]gravitational \space\ potential \space\ energy \space\ (gpe)= m g h\\[/tex] ,
where m is the mass, g is acceleration of gravity, and h is height of object.
In our case, m = 1.2 kg, g = 9.8m/s², and gpe = 50 J.
50 = 1.2 x 9.8 x h
h = 50 / (1.2 x 9.8)
h = 4.25 m
Answer:
4.25m
Explanation:
Joules is a "derived unit", meaning it is really composed of other units, and it is just abbreviated as a single letter.
[tex]1[J]=1 [\frac{kg \cdot m^2}{s^2}][/tex]
This comes from the formula for potential energy, often denoted "U"
[tex]U=mgh[/tex], where m is the mass of the object (measured in kilograms, [tex]kg[/tex]), g is the acceleration due to gravity at that spot (measured in meters per second squared, [tex]\frac {m}{s^2}[/tex]), and h is the height of the object (measured in meters, [tex]m[/tex]).
Note: The object itself may or may not have an acceleration of "g" at the given point because it may be supported (like on a bookshelf). However, the "g" is representative of its gravitational acceleration at that point if gravity could accelerate it unimpeded.
Rearranging the potential energy equation to isolate the unknown "h", dividing both sides by "m" and "g", we get the following:
[tex]\dfrac{U}{mg}=h[/tex]
Substituting known values (and rewriting Joules as its SI units so we can ensure units cancel the way we need them to):
[tex]\dfrac{\left (50 [\frac{kg \cdot m^2}{s^2}] \right)}{(1.2 [kg])(9.8 [\frac{m}{s^2}])}=h\\\dfrac{\left (50 [\frac{kg \!\!\!\!\!\!\!{--} \cdot m^{2 \!\!\!{-}}}{s^2\!\!\!\!\!\!\!{--} }] \right)}{(1.2 [kg \!\!\!\!\!\!\!{--} ])(9.8 [\frac{m\!\!\!\!\!\!\!{--} }{s^2\!\!\!\!\!\!\!{--} }])}=h\\\dfrac{(50)}{(1.2)(9.8)}[m]=h\\\\4.2517[m] \approx h[/tex]
Thus, the height of the book would be approximately 4.25meters high.
write the function of force
Answer:
Force can make a body that is at rest to move. It can stop a moving body or slow it down. It can accelerate the speed of a moving body. It can also change the direction of a moving body along with its shape and size.
Look at the diagram. The electricity supplier charges 14p per unit. How much did this electricity cost over the 24 hour period
Total units
31487-3146323unitsCost°
14(23)$322Which one of these is a compound
Answer:
(b) see attached
Explanation:
A compound is composed of molecules, each of which is composed of atoms of two or more different elements.
A single atom of any type is not a compound, nor is a collection of atoms of the same type.
__
The attached figure shows a molecule of HCl, hydrogen chloride. It is a compound.
The position of a train at a time 2 seconds is 100m from a station. Suppose its velocities at the end of 2 seconds and at the end of 10 seconds are 5m/s and 20m/s respectively. Find the position of the train at the end of 10 seconds.
vf²=vi²+2ad
5²=0+2a.100
a=0.125 m/s²
20²=0+2 x 0.125 x d
400 = 0.25d
d = 1600 m
What name describes an object that orbits a planet?
Answer:
It can be either a moon or a satellite
Explanation:
a moon is a piece of space debris that orbits a planetdue to the planets gravitational force. Inherently, satellite mimics a moon but it is used for collecting data and etc
Avery sees a UFO out her bedroom window and calls to report it to the police. She says, "The UFO moved 20.0 m east, 10.0 m north, and 30.0 m west before it disappeared." What was the displacement of the UFO while Avery was watching?
Answer:
10^2 + 10^2 = x^2
x = 14.2 m NW
find the energy u of the capacitor in terms of c and q by using the definition of capacitance and the formula for the energy in a capacitor.
The energy stored in a capacitor is determined as ¹/₂Q²/C.
Energy stored in a capacitorThe energy stored in a capacitor is determined from the following formulas as shown below;
U = ¹/₂Q²/C
Where;
Q is the chargeC is capacitanceU is energy stored.Thus, the energy stored in a capacitor is determined as ¹/₂Q²/C.
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Every magnet must have what at its ends?
O A. A north pole and a south pole
OB. A positive charge and a negative charge
C. A positive charge and a north pole
OD. A south pole and another south pole
SUBE
Explanation:
The correct is A.
every magnet have two pole
how many wavelengths are represented
Answer:
two wavelength are present
as wavelength is counted either from crest to crest or trough to trough and there are only 2
which lens is used to treat hypermetropia ?
Answer:
convex lense
Explanation:
people with hyperopia or hypermetropia are long sighted or farsighted, so what happens here is that light doesn't focus on the surface of the retina but behind it so the picture is moved forward by positioning a convex lense in front of a hypermetropic eye and is correctly centered in the retina.
Calculate the change in time for each quarter of the
The change
in time for the first quarter is
v
track. Record the change in time in Table C of your
seconds.
Student Guide.
The change in time for the second quarter is
seconds.
The change in time for the third quarter is
seconds.
The change in time for the fourth quarter is
seconds.
Answer:
The change in time for the first quarter is seconds. = 2.07
The change in time for the second quarter is seconds.
=1.09
The change in time for the third quarter is seconds.
=0.95
The change in time for the fourth quarter is seconds.=0.81
Explanation:
Hope this helped.
Which two changes would decrease the electric force between two charged particles? A. Decrease the charge of one of the particles. B. Increase the charge of one of the particles. C. Increase the distance between the particles. D. Decrease the distance between the particles. E. Increase the charge of both particles. Which two changes would decrease the electric force between two charged particles ? A. Decrease the charge of one of the particles . B. Increase the charge of one of the particles . C. Increase the distance between the particles . D. Decrease the distance between the particles . E. Increase the charge of both particles .
Answer:
A C
Explanation:
F = C q1q2/r^2 means that decreasing the charge (s) or increasing distance will decrease force
A C
Question 2 of 32
What did Ernest Rutherford's experiment of a beam of alpha particles aimed
at a sheet of gold foil lead him to conclude?
spurs"" are probably the result of ____.
Spurs are probably the result of self-sustaining star formation.
What is the formation of gaseous spurs in spiral galaxies?The gigantic form of the magnificent doppelganger spiral patterns that spiral outward from the galactic cores gave spiral galaxies their name. These light arms of spiral galaxies are frequently seen in optical pictures to be speckled with bright star-forming areas at regular intervals.
Smaller structures spread forth and rearward into the interarm area from each major spiral arm. Spiral-arm also known as spurs are the name given to these substructures. Sometimes the spurs are also filled with star-forming clusters. As a consequence, we may draw the conclusion that spurs most likely emerge from self-sustaining star formation.
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what are challenges of securing a crime scene
At any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.
What is the meaning of physical evidence?In evidence law, physical evidence (also called real evidence or material evidence) is any material object that plays some role in the matter that gave rise to the litigation, introduced as evidence in a judicial proceeding (such as a trial) to prove a fact in issue based on the object's physical characteristics.
The two types of evidence at crime scenes:
Biological evidence (e.g., blood, body fluids, hair and other tissues)
Latent print evidence (e.g., fingerprints, palm prints, footprints)
The biggest impediment to an investigation is the removal or loss of a piece of evidence from the scene of a crime.
Hence, at any crime scene, the two greatest challenges to the physical evidence are contamination and loss of continuity.
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what evidence did astronomers use to prove jets travel in opposite directions?
The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.
Who are the astronomers?Astronomer is a person who study astronomy which is a scientific study that has to do with space, space bodies, comets, planets, stars and so on.
Therefore, The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.
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Which marine habitats would have the least access to primary producers?
a.
salt marshes and estuaries
b.
coral reefs and lagoons
c.
mangroves and intertidal zones
d.
deep sea and sea floor
Please select the best answer from the choices provided
A
B
C
D
Answer:
D
Explanation:
Deep sea and sea floor marine habitats would have the least access to primary producers. The correct option is (d).
Primary producers would have the least access to habitats in the deep sea and on the ocean floor. Primary producers are animals and plants that can use sunlight as an energy source to photosynthesize and make their own food, including algae and phytoplankton.
Because of the depth of the water, light penetration is constrained in the deep sea and sea floor settings, making it difficult for creatures that rely on photosynthesis to survive.
In comparison to other maritime ecosystems, where sunlight is more easily obtainable, such as coral reefs, lagoons, salt marshes, estuaries, mangroves, and intertidal zones, these habitats often have lower amounts of primary production.
Therefore, The correct option is (d) deep sea and sea floor.
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What will be the ratio between the initial and final kinetic energy of a car, if its velocity is tripled?
A. 1:6
B. 1:7
C. 1:8
D. 1:9
Answer:b
Explanation:
In a game of Tug-of-War,
when are the forces
unbalanced?
A. when one side lets go of the rope
B. when the net force is o N
C. when both sides pull with 55 N
When two or more capacitors are connected in series across a potential difference.
Explanation:
1. the potential difference across the combination is the algebraic sum of yhe potential differences across the individual capacitors
2. the equivent capacitance of the combination is less than the capacitance of any of the capacitors..
Which law of motion explains what happens during a ride on the bumper cars ?
Answer:
Newtows first law of motion
A torque acts on a wheel rotating at 19.8 rad/s and increases its angular speed to 23.5 rad/s in 11.2 s. Find the angle through which the wheel turns during this time.
243 rad is the angle through which the wheel turns during this time.
What is torque and angular speed?
Torque is a measure of the force that can cause an object to rotate about an axis.
Angular speed is define as the measuring angle of rotation over a given amount of time.
Mathematically , ω = θ t
From the given question ,
Torque = 19.8 rad/s
ω = 23.5 rad/s
t = 11.2 s
We get the equation,
[tex]\frac{ 19.8 +23.5}{2} * 11.2[/tex]
= 243 rad
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You have found that the net force exerted on the cylinder depends on several different independent variables in different ways. how can you combine those separate dependencies into one equation relating the net force to the relevant independent variables
The net force on the cylinder depends on several independent variables such as mass, acceleration, velocity, time, etc, and it is given as F(net) = ma.
Net force exerted on the cylinder
The net force on the cylinder is calculated from Newton's second law of motion.
F(net) = ma
F(net) = m(v/t)
where;
m is mass of the cylindera is acceleration of the cylinderv is velocity of the cylindert is time of motion of the cylinderThus, the net force on the cylinder depends on several independent variables such as mass, acceleration, velocity, time, etc, and it is given as F(net) = ma.
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How many moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 1024 fluorine atoms?
12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. Details about number of moles can be found below.
How to calculate number of moles?The number of moles in a molecule of a substance can be calculated by dividing the number of molecules by Avogadro's number.
According to this question, a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms. The number of moles in this sample can be calculated as follows:
no of moles = 7.45 × 10²⁴ ÷ 6.02 × 10²³
no of moles = 1.24 × 10¹
no of moles = 12.4moles
Therefore, 12.4 moles of fluorine atoms are in a sample of fluorine that contains 7.45 x 10²⁴ fluorine atoms.
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You are ask to bring a cylindrical rod of length 45cm and diameter of 4.53cm to a mechanic. what is the weight of the aluminum rod if the density is 3.7*10^3kg/m^3
26.676 × 10³ kg is the weight of the aluminum rod.
To calculate specific weight:Given:
Length of cylindrical rod (h) = 45 cm
Diameter of a cylindrical rod = 4.53 cm
Radius of a cylindrical rod (r) = 2.3 cm
The density = 3.7*10^3kg/m^3
Volume of a cylindrical rod = πr²h
= 3.14× (2.3)² × 45
= 747.89 cm
= 7.4789 m
To find weight ;
ρ = [tex]\frac{Mass}{Volume}[/tex] ; ρ = Density
Mass = ρ × Volume
= 3.7 × 7.48 × 10³
=27.676 × 10³ kg
Therefore, the weight of the aluminum rod is 27.676 × 10³ kg.
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What motion is expected of the scapula during arm elevation?
During arm elevation, the motion of the scapula moves is an upward rotation motion.
What is the scapula?The scapula otherwise known as the shoulder blade is a bone found in the upper limb and forms part of the shoulder and the back.
They are triangular in shape.
The scapula enables movement of the shoulder and the arm in about six ways.
During arm elevation, the motion of the scapula moves is an upward rotation motion: protraction, retraction, elevation, depression, upward rotation, and downward rotation.
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