( a) The acceleration of the box in the absence of friction is 8.49 m/s².
(b) The acceleration of the box in the presence of friction is 1.7 m/s².
(c) The speed of the box at the bottom of the incline is 18.44 m/s.
What is the acceleration of the box in absence of friction?
The acceleration of the box if no friction is present is calculated by applying Newton's second law of motion.
mg cosθ = ma
g cosθ = a
where;
g is acceleration due to gravityθ is the angle of inclination of the rampThe acceleration of the box in the absence of friction is calculated as;
a = ( 9.8 ) x ( cos 30 )
a = 8.49 m/s²
The acceleration of the box in the presence of friction is calculated as;
Ff = ma
where;
Ff is the force of frictionμmg cosθ = ma
μg cosθ = a
( 0.2 x 9.8 x cos 30 ) = a
1.7 m/s² = a
The speed of the box at the bottom of the incline is calculated as follows;
v² = u² + 2ah
where;
u is the initial velocity of the box = 0h is the vertical height of fall of the boxa is the acceleration of the boxv² = 0 + 2ah
v = √ ( 2ah )
h = L sinθ
v = √ ( 2 x a x L sinθ )
v = √ ( 2 x 1.7 x 200 x sin 30 )
v = 18.44 m/s
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A 3000-N force gives an object an acceleration of 15 m/s2. The mass of the object is
200 kg
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityPhysics
Newton's Law of Motions
Newton's 1st Law of Motion: An object at rest remains at rest and an object in motion stays in motion
Newton's 2nd Law of Motion: F = ma (Force is equal to [constant] mass times acceleration)
Newton's 3rd Law of Motion: For every action, there is an equal and opposite reaction
Explanation:Step 1: Define
[Given] F = 3000 N
[Given] a = 15 m/s²
[Solve] m = x kg
Step 2: Solve for m
Substitute in variables [Newton's Second Law of Motion]: 3000 N = m(15 m/s²)[Mass] [Division Property of Equality] Isolate m [Cancel out units]: 200 kg = m[Mass] Rewrite: m = 200 kgstate the particles of matter
Answer:
Matter can exist in one of three main states: solid, liquid, or gas. Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. Liquid matter is made of more loosely packed particles.
Which of the following characteristics indicates a high level of adaptability to change over
time?
A. Needs routines that stay the same
OB. Insists on doing things her own way
C. Not easily influenced by peer pressure
OD. Open to new ideas and experiences
In some areas, hydroelectric power is not geographically appropriate and a different renewable energy source would be a better option. A conservation group is looking for renewable energy sources other than hydroelectric energy that could be used to generate electricity in grassland ecosystems, such as in the midwestern United States or in a savanna in Africa.
Required:
a. Propose a different renewable resource to use that would be a realistic solution to generating electricity without using fossil fuels or hydroelectric power in a grassland ecosystem.
b. Justify the solution proposed above by explaining a potential advantage of using a different renewable resource to generate electricity.
Answer:
a) wind power system, turbines powered, solar power system
b) the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
Explanation:
In a grassland system it may not have great changes in height or mountain system where it is easy to represent a river, therefore a hydroelectric power system is not very feasible.
a) You can have several alternative energy systems.
* If there is a fairly constant air current, a wind power system could be implemented.
* If there is a river with an acceptable flow, a generation system can be implemented with turbines powered by the river flow.
* Another system is a solar power system
b) To select any of the possible systems proposed, the current and future energy requirements of the region must be analyzed.
The amount of energy that each proposal can supply
Analyze the installation costs and the economic benefits of a given system.
Study the possible problems for the maintenance of each system.
A great advantage of these systems is the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
The most plausible renewable energy source in a grassland is wind energy.
Renewable energy refers to energy that is obtained from wind, water biomass or underground heat. All of these sources of energy are inexhaustible and hold great prospect to solving the current energy deficit is many parts of the world.
In grasslands, the most plausible renewable source of energy is wind. Winds are abundant in grasslands . It is more plausible than hydroelectric power because it does not create any adverse environmental impact. It is the cleanest energy source.
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How many atoms are represented by the formula CaF2? A. Four B. Five C. Two D. Three
Answer:
C?
Explanation:
There's 2 different atoms, Ca and F. Unless it's counting the whole thing... then three? (Ca + 2 F atoms)
How is Newtons second law apply to the egg drop ?
Answer:
Newton's Second Law is applied because of the acceleration caused by natural forces as the egg is plummeting to the earth. And the amount of acceleration the egg has will be largely affected by the amount of force Mr. Baker uses to hurl the egg to the ground.
Explanation:
hope that helps
To construct a non-mechanical water meter, a 0.500-T magnetic field is placed across the supply water pipe to a home and the Hall voltage is recorded.
Required:
a. Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV.
b. What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Answer:
a. 4 m/s b. 0.2 V
Explanation:
a. Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV.
The hall voltage V = vBd where v = flow-rate, B = magnetic field strength = 0.500 T and d = diameter of pipe = 3.00 cm = 0.03 m
Since V = vBd
v = V/Bd given that V = 60.0 mV = 0.060 V, substituting the values of the other variables, we have
v = 0.060 V/(0.500 T × 0.03 m)
v = 0.060 V/(0.015 Tm)
v = 4 m/s
b. What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Since the hall voltage, V = vBd and v = flow-rate = 4 m/s, B = magnetic field strength = 0.500 T and d' = diameter of pipe = 10.0 cm = 0.10 m
Substituting the variables into the equation, we have
V = vBd
V = 4 m/s × 0.500 T × 0.10 m
V = 0.2 V
convertion of unit 8.28x10^-2ft m
Answer:
yes
Explanation:
no
People are good at learning to recognize _______________. *
A.stars
B.constellations
C. patterns
D. Orion
E. Casseopia
F.look
G. distance
H.rotates
*Fill in the blank*
help <3 Please and thanks :>
Answer:
A
Explanation:
pressure, V is volume , T is temperature of a gas and R is gas constant.
b) Can the sum of two equal vectors be equal to either of the vectors?
Explain
On Earth, what can a divergent boundary
cause?
A. An iceberg
B. A plateau
C. A rift valley
Answer: C
Explanation:
Divergent plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other. Divergent boundaries within continents initially produce rifts, which eventually become rift valleys. Most active divergent plate boundaries occur between oceanic plates and exist as mid-oceanic ridges.
A pendulum is swimging. It swings 85 complete swings and this takes 102 seconds. What is the frequency?
Answer:
0.833 Hz
Explanation:
While, there are plenty of ways to calculate frequency, the one formula you should use in this case is:
#times/seconds --> 85/102
= 0.833 Hz
Simple explanation of string theory, please don’t plagiarize.
What happens when weathering and erosion work together?
A. New mountains are created
B. The climate changes overnight
C. Metal objects become rusty
D. They change the earths surface
Plssss help
Answer:
A. New mountains are created
A ray diagram is shown.
A flower is an object in front of a convex mirror. A ray parallel to the principal axis reflects away from the focal point. The second ray goes to the mirror toward the focal point and reflects parallel to the principal axis. The reflected rays are continued onto the other side of the mirror as dashed lines. At the intersection of the two dashed lines is a small upright image of the object in front of the focal point.
Which describes the image?
It is virtual and in front of the mirror.
It is virtual and behind the mirror.
It is real and in front of the mirror.
It is real and behind the mirror.
Answer:
B. Its virtual and behind the mirror.
Explanation:
Answer: (B) Virutal, (D) Upright, (E) Smaller.
Explanation:
Edge Physics B
If you wanted the block to remain in the center of the table what masses of blocks would you add and where? Use the letters going around the table to identify their locations and tell me the mass you would make the block at that location (for example Point B 6000g)
Answer:
The work done is twice as great for block B because it is moved twice the ... Equal forces are used to move blocks A and B across the floor. ... Does the normal force of the floor pushing upward on the block do any work? ... Suppose that the mass is halfway between one of the extreme points of its motion and the center point.
Explanation:
what is the difference between mass and weight
Answer:
The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force).
Explanation:
Answer:the difference is weight is the force exerted from an object by gravity
Explanation:
And mass is how much “stuff” is in an object
Round the following numbers.
a. 123.517 to 2 decimal places.
b. 14.328 km. hr -1 to one decimal place.
c. 0.00934 m to 3 decimal places.
Answer:
(a) 123.517 to 2 decimal places = 123.52
(b) 14.328 km/hr to 1 decimal place = 14.3
(c) 0.00934 m to 3 decimal places = 0.009
Explanation:
a. 123.517 to 2 decimal places
⇒ to 2 decimal places = 123.52 ( round 7 to 1 since it is up to 5 and add it to 1 before it.)
b. 14.328 km/hr to one decimal place.
⇒ to 1 decimal place = 14.3 (round 8 to 1 since it is up to 5 and add it to 2 before it, the 2 becomes 3, round the 3 to 0 since it is less than 5)
c. 0.00934 m to 3 decimal places.
⇒ to 3 decimal place = 0.009
List 5 possible effects of not adhering to standards of measurement
Answer:
factual evidence of customer-service levels.
better understanding of cross-functional performance.
enhanced alignment of operations with strategy.
evidence-based determination of process improvement priorities.
detection of performance trends.
better understanding of the capability range of a process.
Technician A says that cabin filters are accessible behind the glove compartment. Technician B says that cabin filters are accessible from under the hood. Who is correct? A. Technician B only B. Both Technicians A and B C. Technician A only D. Neither Technician A nor B
Answer:
A
but it depends on the car
Explanation:
Disadvanlayes and advantager of the and A and B
Answer:
Advantages
If there is a fault in one of the electric appliances, the current is able to pass through different paths of the circuit.
Disadvantages
In parallel circuits, we cannot increase the voltage since the resistance decreases in the parallel circuit.
Explanation:
did anyone do the, kinetic energy lab report in physics?? plzzz help a girl outttttttt i need answerss????ill give you as much brainlist or points
Answer:
yes
Explanation:
Solve for x in the diagram below.
(4.2 + 50°
150
T =
Answer:
x = 25
Explanation:
Find the diagram attached
From the diagram,
4x + 50 = 150 (vertically opposite angle)
4x = 150 - 50
4x = 100
x = 100/4
x =25
Hence the value of x is 25
what is clinograph and how to read it
Answer:
Explanation:
A climograph is a graphical representation of a location's basic climate. Climographs display data for two variables:
(a) monthly average temperature
(b) monthly average precipitation. These are useful tools to quickly describe a location's climate.
The same spring is stretched 5 m. What was the force?
Answer:
La fuerza del resorte es directamente proporcional a la extensión del resorte. En otras palabras, si jalas mucho de la masa, la fuerza será intensa; si jalas poco de la masa, la fuerza será débil.
Explanation:
A cube measures 2.5 cm in height and has a density of 3.0 g/cm³. What is the mass?
Answer: mass: 46.875 g
Explanation:
[tex]density = \frac{mass}{volume}[/tex]
density = 3.0 g/cm^3
volume (lwh are all 2.5 since it is a cube) = 2.5^3 = 15.625
mass = ?
[tex]3 = \frac{mass}{15.625}[/tex]
mass = 3*15.625 = 46.875
sun *
a.) the hunter
b.) Pole Star
c.) little bear
d.) pattern of stars
e.) nearest star
Plz help :> <3
Answer:
E
Explanation:
As water rises through the troposphere and cools, it changes from a(n) ————- to a(n) ———— through the process of condensation; when the tiny drops of water come together, they form ————- .
Answer:
GAS, LIQUID, CLOUDS
Explanation:
Water can be in three states: solid, liquid and gas, passing from one to another depending on the pressure and temperature.
In this complementation exercise.
When the water cools down the GAS goes to the LIQUID state, these small drops unite and form the CLOUDS
1. It takes Tiffany 0.25 hours to get to school in the mornings. She lives 4.5 miles away
from the school. At what speed is she traveling to get there?
Answer:
0.05
Explanation:
u just divide 0.25/4.5 and u get that
If It takes Tiffany 0.25 hours to get to school in the mornings. She lives 4.5 miles away from the school, then the speed of traveling off the Tiffany would be 28.96 kilometers per hour.
What is speed ?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.
As given in the problem we have to find the speed It takes Tiffany 0.25 hours to get to school in the mornings. She lives 4.5 miles away from the school,
Speed of traveling = total distance traveled by the Tiffany / Total time
Speed of traveling = 4.5 × 1.609 / 0.25
= 28.96 kilometers per hour
Thus, the speed of traveling off the Tiffany would be 28.96 kilometers per hour .
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Calculate the gravitational pull between the Earth and the Moon
Answer:
F = 1.99 10²⁰ N
Explanation:
The gravitational attraction is given by the expression
F = [tex]G \ \frac{m_1m_2}{r^2}[/tex]
where G is the constant of attraction 6.67 10⁻¹¹ N m²/kg²
in this case the bodies are the Earth and the Moon
let's calculate
F = [tex]6.67 \ 10^{-11} \ \frac{ 7.36 \ 10^{22} \ 5.98 \ 10^{24} }{ (3.84 \ 10^8)^2}[/tex].67 10⁻¹¹ 7.36 10 22 5.98 1024 / (3.84 108) 2
F = 1.99 10²⁰ N