Answer:
87
Explanation:
what units is time measured in
Answer:
The base unit for time is the second (the other SI units are: metre for length, kilogram for mass, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for the amount of substance). The second can be abbreviated as s or sec.
Explanation:
Which of these is an example of work being done on an object a. Holding a heavy piece of wood at a construction site. b. Trying to push a car that doesn't move out of deep snow. c. Pushing a child on a swing. d. Holding a door shut on a windy day so it doesn't blow open.
Answer:
I would say the best choice, would be Choice C.
For all of these scenarios a force is being applied to displace an object. But the displacement occur in the case of trying to push a car and pushing a child on a swing. Thus, options b and c are correct.
What is work done?Work done in physics is the dot product of force and displacement. Therefore, every work done is associated with a force but not all force result in work done. Those force, which result in a displacement will do work done.
Holding a heavy piece of wood does not make a displacement in the object. Similarly, when we hold the door to stop we just apply a force and not displacing the door. In both cases work done is zero.
When we push a car to make it move and any movement from the side of the car result in a work done. Similarly in when we push a child in a swing we make the swing move a distance by applying force. Thus work is being done on the object.
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Two rocks are at the top of a building. Rock 1 is dropped from rest while Rock 2 is thrown horizontaly at a velocity of 5 ms.
What is the magnitude of the horizontal acceleration of rock 2?>
O m/s 2
2 m/s 2
5 m/s 2
10 m/s2
PLEASE HELP EMERGENCY!!!
Which statement represents a correct hierarchical organizational relationship
among living things?
A Organs make up cells and cells make up atoms.
B Atoms make up tissues and tissues make up cells.
C Cells make up organs and organs make up tissues.
D Cells make up tissues and tissues make up organs.
Answer:
Living things are highly organized and structured, following a hierarchy that can A molecule is a chemical structure consisting of at least two atoms held In larger organisms, cells combine to make tissues, which are groups of An organ system is a higher level of organization that consists of functionally related organs.
Explanation:
Living things are highly organized and structured, following a hierarchy that. A molecule is a chemical structure consisting of at least two atoms held In larger organisms.
What is Living organisms?Cells combine to make tissues, which are groups of An organ system is a higher level of organization that consists of functionally related organs.
The fact that all living things are composed of cells—which are regarded as the foundation of life—is what first distinguishes them from other types of organisms. The remarkable thing about cells is that, despite their small size, they can join together to build extremely vast structures.
Multicellular organisms are extraordinarily sophisticated creatures with amazing cellular organization. This organization starts deep within your DNA and reaches all the way up to you as an individual.
Therefore, Living things are highly organized and structured, following a hierarchy that. A molecule is a chemical structure consisting of at least two atoms held In larger organisms.
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In a chemical reaction,sodium sulphate and barium chloride are mixed to form barium sulphate(a precipitate)and sodium chloride. (i)What are the reactants in the above reaction? (ii)What are the products?
Answer:
i) The reactants are sodium sulphate and barium chloride
ii) The products are barium sulphate and sodium chloride.
Explanation:
In chemistry, a chemical reaction occurs when one or more chemical substances usually referred to as REACTANTS undergoes some processes and is converted to one or more different substances known as PRODUCTS.
From the question:
Na2SO4 + BaCl2 ⟶ 2NaCl + BaSO4
The above balanced equation represents the chemical reaction between sodium sulphate and barium chloride. Both are the reactants because they where the substances that passed through a process ( this involves the breaking of bond that held them together).
The PRODUCTS are barium sulphate and sodium chloride because they are the substances that presented at the end of the chemical reaction.
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (30pts)
Answer:
Decreasing
Explanation:
There are 2 employees considered for a promotion. Candidate A went to a top university (say Harvard), and achieved a top GPA (grade point average) and is generally considered one of the most knowledgable employees in the company, but their colleagues often complain abut having to work with candidate A on projects. Candidate B's colleagues have lots of praise for how candidate B is able to work as a team at achieving common goals, but candidate B went to a local community college and didn't receive a very high GPA. Which candidate do you think will or should get the promotion?
Answer:
Canidate B
Explanation:
Becuase he/she is good to work with, and will most likely be more determined.
A child sits 2 meters from the center of a merry-go-round rotating with a
tangential velocity of 0.8 m/s. If the force that maintains the child's circular
motion is 25 N, what is the mass of the child?
How is the Physics definition of momentum different from the ""colloquial"" use of momentum
Answer:
Explanation:
You know, I never really thought about this very much. I've always just thought of it as M * V. But when you look at a dictionary definition, it says it is the motion of a body.
That means that speed can be a momentum. Speed is independent of direction. So the colloquial definition does not take into account a change in direction as being very relevant.
The answer then is direction. When physics uses v, it is also counting direction.
1. How much kinetic energy does an apple with a mass of 0.25 kg have if it is falling at a speed of
10m/s
I hope this helps.......
Will an objects mass affect the kinetic energy? (If then because answer)
Answer: Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant
Explanation:
A vibrating object with a high frequency would be
described as having a low period.
True or false
Answer:
False
Explanation:
It would be described as having a long period
A vibrating object with a high frequency would be
described as having a low period is a false statement.
The individual air molecules do not "travel" with the wave. They just vibrate back and forth. When the vibrations are fast (high frequency), you hear a high note. When vibrations are slower, you hear a lower note.
What is frequency ?"Frequency is the number of occurrences of a repeating event per unit of time. "It is also occasionally referred to as temporal frequency to emphasise the contrast to spatial frequency, and ordinary frequency to emphasise the contrast to angular frequency.
Other units: cycles per second (cps); revolutions
SI unit: hertz (Hz)
In SI base units: s−1
Derivations from other quantities: f = 1 / T
What is period ?"A period T is the time required for one complete cycle of vibration to pass a given point. "As the frequency of a wave increases, the period of the wave decreases. Frequency and Period are in reciprocal relationships and can be expressed mathematically as: Period equals the Total time divided by the Number of cycles.
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what is the definition of the word amplitude
Explanation:
Amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path. ... Waves are generated by vibrating sources, their amplitude being proportional to the amplitude of the source.
the condition required to work to be done
Answer:
work=f(costheta)
Explanation:
work is done when a force acts on a body and displaces it on the direction of force
A ball has 17 J of kinetic energy and its mechanical is 25 J
If the ball has a mass of 3.2 KG what is it’s height above ground?
Answer:
0.255m
Explanation:
The total mechanical energy of the ball is given 25 J. The potential energy of the ball is 8 J. Then, the height of the ball above the ground is 0.25 m.
What is kinetic energy ?Kinetic energy of an object is the energy generated by virtue of its motion whereas potential energy is generated by virtue of its position at a height from the ground.
The sum of kinetic and potential energy of the object is called its mechanical energy.
given Ke of the ball = 17 J
mechanical energy = 25 J
then potential energy = 25 J - 17 J = 8 J.
We have the relation between potential energy, mass and height h as :
p = mgh .
given the mass m = 3.2 kg
g = 9.8 m/s²
then, h = p / (mg)
h = 8 J / (3.2 kg× 9.8 m/s² )
= 0.25 m.
Therefore, the height of the ball above the ground is 0.25 m.
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A penny is made of the element zinc
plated with the element copper; a nickel
is made of a mixture of the elements
nickel and copper. Some isotopes of
various elements are listed below by
their atomic number and mass num-
ber. Use the periodic table on p. 131
to identify which atoms you would
expect to find in the penny, which you
would expect to find in the nickel,
which you would expect to find in
both, and which you would expect to
find in neither coin.
Answer:
Explanation: what is the question?
A sock stuck to the side of a clothes-dryer barrel has a centripetal acceleration of
28m/s?. If the dryer barrel has a radius of 27.5cm, what is the tangential speed of the
sock?
Answer:
Tangential speed, V = 2.78 m/s.
Explanation:
Given the following data;
Centripetal acceleration = 28m/s²
Radius = 27.5cm to meters = 27.5/100 = 0.275 meters
To find the tangential speed;
Centripetal acceleration = V²/r
Substituting into the formula, we have;
28 = V²/0.275
V² = 28 * 0.275
V² = 7.7
Taking the square root of both sides, we have;
Tangential speed, V = 2.78 m/s.
The tangential speed of the sock will be 7.7 m/sec².Tangential speed is as the linear speed of any object travelling along a circular route.
What is tangential speed ?Tangential speed is defined as the linear speed of any item travelling along a circular route.
A point on the outside edge of a turntable travels further in one complete rotation than a point towards the center.
The given data in he problem is;
a is the centripetal acceleration =28m/s?
r is the radius of 27.5cm
v is the tangential speed of the sock=?
[tex]\rm a= \frac{v^2}{r} \\\\ \rm v= \sqrt{ar} \\\\ \rm v= \sqrt{28 \times 0.275 } \\\\ \rm v=7.7 \ m/sec^2[/tex]
Hence the tangential speed of the sock will be 7.7 m/sec².
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If an object has a mass of 45 g and a volume of 5 mL, what is that object’s density? Show your calculation?
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (47pts)
[tex]\huge\mathfrak\red{answer}[/tex]
Jake was playing making a paper airplane, after making he kept it on the table and went to have food.
Suddenly his brother saw the plane and threw it in the air, The airplane kept flying for about 3m/s and it hit his mother and due to the force the plane stopped.
{kept in on the table>rest
brother threw the plane>moving
it hit his mother>force that stopped it}
(mark me brainliest if you're satisfied with my answer)
[tex]\large\sf\red{thank \: you}[/tex]
The hierarchy of traits is a structured progression of personality that begins with a few higher-order traits that result in
several lower-order traits, determining a person's response in a specific situation.
Please select the best answer from the choices provided
OT
OF
Answer:
true
Explanation:
hope u find this helpfull
Your family drives to the mountains one weekend. You drive 55miles for the first hour and the next 3 hours
you travel a distance of 180miles. What's your average speed for the 4 hours ?
Answer:Jane drives at an average speed of 45 mph on a journey of 135 miles.
Explanation:
Calculate the power of a pump that can lift 70 kg of water through a vertical height of 16m in 10 seconds?
Answer:
1120
Explanation:
power =force ×velocity
=700*1.6=1120
Need help please????????!!!!!!!!!!
Answer:
Your education back ground
Explain the relationship between magnetic fields and magnetic force.
Answer:
Magnetic field is the strength of magnetism created by a magnet, whereas the magnetic force is the force due to two magnetic objects. The concepts of magnetic field and magnetic force are widely used in fields such as classical mechanics, electromagnetic theory, field theory and various other applications.
Explanation:
True or false your vocal cords act like a guitar string when it comes to sound
Answer:
True
Explanation:
A horizontal force of 164 N is applied to move a 55 kg television set across a 9 m level surface. What is the work done by the force on the television set?
Answer:
Workdone = 1476 Nm
Explanation:
Given the following data;
Force = 164 N
Mass = 55kg
Distance = 9 m
To find the work done;
Workdone = force * distance
Workdone = 164 * 9
Workdone = 1476 Nm
Therefore, the work done by the force on the television set is 1476 Nm.
The attractive force between two objects that depends on their masses and the distance between them is _______?
Answer:
gravitational force
Explanation:
an object with mass attractive another object with mass
ANSWER:
GRAVITATIONAL FORCE
EXPLANATION :
Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.
10
Select the types of data that describe climate. (You may select more than one
correct answer)
one day's
Temperature
average ocean
depth
average
precipitation
annual wind
speed
Answer:
temperiture or annual wind speed.
Explanation:
The baseball diamond is a square with sides 27.4 m long. If the positive x-axis points from home plate to first base and the positive y-axis points from home plate to third base, find the magnitude and the direction angle of the displacement vector is a base runner who has just hit A) a double, B) a triple, and C) a home run.
Answer:
What is the magnitude of the player 's displacement? A baseball "diamond" is a square, each side of length 27.4 m, with home plate and if each length of the base is 27.4 m, and the baseball player ran to third base,Then, the baseball player is 27.4 feet away from home plate (where he started)below the horizontal.
Explanation:
the sum of vectors we were able to find the displacement of the corridor for each case
a) d = 38.75 m
b) d = 27.4 m
c) d = 0 m
given parameters
the distance of each side of the square r = 27.4mto find
the distance in three casesA) a double
B) A triple
c) A home run
The displacement is a vector for which, in addition to the module, it has a direction, so it must be taken into account for the calculations. In the exercise, set a reference system with the x-axis in the direction from Home to first base and the y-axis from home to third base.
To find the displacement we use the Pythagoras theorem
d = [tex]\sqrt{d_x^2 + d_y^2}[/tex]
if the displacements are on a single axis the addition reduces to arithmetic addition
Let's analyze the different cases:
a) hit a double
runner goes from home plate to second base
d = [tex]\sqrt{r^2+r^2}[/tex]Ra r² + r²
d = r √2
d = 27.4 √2
d = 38.75 m
b) hit a triple
Runner goes from home plate to third base
the distance from home to first base x = r
the distance from second to third base x = -r
the negative sign indicates that it is going in the opposite direction
d = [tex]\sqrt{(r-r)^2 +r^2}[/tex]
d = r
c) Hit a home run
in this case, the runner returns to the starting point, because of a vector the displacement is zero
d = 0
In conclusion, applying the sum of vectors we were able to find the displacement of the corridor for each case
a) d = 38.75 m
b) d = 27.4 m
c) d = 0
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Answer:
ok so I'm going left to right
a) 3 2 1 4
b) i don't know