Answer:
the same mass answer b) but i dont know first question
A 100 N force directed at 60 above the horizontal pulls a box 2 m horizontally across a floor. How much work was done?
A. 50 J
B. 20 J
C. 100 J
D. 200 J
Answer:
C. 100 J
Explanation:
If the 60 you wrote is the degree (60°)
Work done = forcexcos x distance
W= 100x cos 60 x2
W= 100 J
Answer:
100 J
Explanation:
Work done is the product of force and distance. The distance here is easy; it's just 2 m because it was pulled horizontally. The force, on the other hand, requires some more work, no puns intended!
We know the applied force is at an angle. Since work is parallel to the distance, the force used to calculate work must be parallel to the distance as well. This means we must use the horizontal component of the force. This, consequently, calls for the horizontal component of the angle.
Here, that horizontal component is the cosine of theta, cos θ, because the horizontal component must be adjacent to the angle. We know the angle in this case; θ is 60°. So, to find the component of the force parallel to the floor, we must multiply the total force by cos θ.
Here, θ = 60°, and the total force is 100 N. Therefore, the horizontal force equals 100 N × cos 60°. As for cos 60°, its value is 0.5. This means the horizontal force equals 100 N × cos 60° = 50 N.
From here, the work is that force, those 50 N, times the distance the box was pulled, 2 m. Therefore, work equals 50 N × 2 m = 50 N × m = 50 J.
In summary, the total work done is 50 J.
I hope you understand my explanation! Please have a great day!
Which of the cars above are traveling at the same velocity?
A) c and d
B) b,c,d and f
C) b,c and d
D) b and c
Answer:
b,c,d,and f are the car traveling at the sane velocity
In an experiment involving pendulums, you want to see how changing the mass of the bob affects the period (amount of time) of a pendulum swing. What would be your dependent variable?
Answer:
The longer the length of string, the farther the pendulum falls; and therefore, the longer the period, or back and forth swing of the pendulum. The greater the amplitude, or angle, the farther the pendulum falls; and therefore, the longer the period.
Explanation:
Which is a device that stores electric charge by separating positive and negative charges?
O a conductor
O a dielectric
O a resistor
O a capacitor
Answer:
The last one, a capacitor
Explanation:
Right on edge.
_____ are both ways of preserving current energy resources.
1.Increasing efficiency and energy conservation
2.Removing insulation and using incandescent bulbs
3.Energy conservation and removing insulation
4.Using incandescent bulbs and increasing efficiency
Answer:
4
Explanation:
I think if not. I am sorry
Answer: 1
Explanation: sorry im late
he Big Bang Theory suggests....
a
The universe began in an instant.
b
The universe was born from clouds of dust and gas.
c
The single point containing the universe exploded and the universe stretched and expanded.
d
Gravity began to form stars and galaxies from clouds of dust and gas.
e
Both A and C.
f
Both B and C.
g
None of the above.
Answer:
C
Explanation:
To know more head to.
https://phys.org/news/2015-12-big-theory.html
Answer:
i think a and c
Explanation:
4. What is the consequence of atoms being a singular closed system?
Atoms of a certain element contain a fixed amount of energy.
Atoms of a certain element can't be altered by outside forces.
Atoms don't interact with each other in any way.
Atoms decompose slowly over time as they lose energy.
Answer:
*Atomos of a certain element contain a fixed amount of energy.
Explanation:
The atoms are said to be closed systems because the number of protons, neutrons and electrons is fixed, so these elements each have an energy given by the electrical interaction with the other elements.
Consequently, the correct answer is: Atomos of a certain element contain a fixed amount of energy.
Answer:
Atoms of a certain element contain a fixed amount of energy.
Explanation:
What was Orsted’s historic discovery?
Answer:
The electric current in a wire can deflect a compass needle if its magnetized.
Explanation:
100 POINTS + BRAINLIEST IF GOOD ANSWER!!!
What medium is the wave traveling through?
Answer:
ac=alternating current
Explanation:
It is what ac or alternating current looks like while traveling.
A lamp consumes 1000J of ekectrical energy in 10s. Calculate its power.
A 75kg soccer player runs rightward with a velocity of +1.5 m/s toward a 0.43 kg
soccer ball at rest on the grass. If the final speed of the soccer ball is +15 m/s,
what is the final speed of the soccer player?
Answer:
Right
Explanation:
75kg soccer player runs rightward with a velocity of +1.5 m/s toward a 0.43 kg soccer ball at rest on the grass. If the final speed of the soccer ball is +15 m/s, ...
Construct arguments based on evidence about the applications, benefits, and problems of nuclear energy as an alternative energy source.
Answer:
Explanation:
Clean Energy Source It generates more than 800 billion kilowatt hours of electricity each year and produces more than half of the nation's emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.
If I'm wrong I'm sorry
If I'm right thank you and (brainliest plz)
Why is it very dangerous
for the driver and
passengers if any bubbles of gas get into
the brake fluid? Even worse what would go wrong if the break fluid leaked out of its pipes?
Answer:
If it leaks....
If there is a brake fluid leak and air gets mixed with the fluid in the brake lines, then the fluid will not be able to flow correctly. As a result, when you press your foot down on the brake pedal, it will feel squishy or spongy. In other words, the brake pedal will feel very soft.
If air bubbles get into....
Air is the enemy in a hydraulic system because it reduces pressure and essentially makes the process less effective. When air gets into the brake lines, your brake system suffers. Symptoms that can indicate you have air in your brake lines include the following: Brake pedal feels spongy when you press down
Hope it helps!!!!
If an object free-falls for t seconds from rest to d distance, how far will the object fall from rest in twice the elapsed time?
Answer:
When the time of fall is doubled, the height of fall will be quadrupled
Explanation:
Given;
height of fall, h = d m
time of fall, t = t s
initial velocity of the object, u = 0 m/d
The height of fall of the object is calculated from the kinematic equation below;
[tex]h = ut + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\2h = gt^2\\\\g = \frac{2h}{t^2}[/tex]
where;
g is acceleration due to gravity, which is constant
if the time of fall is doubled, the height of fall is calculated as;
[tex]\frac{2h_1}{t_1^2} = \frac{2h_2}{t_2^2} \\\\\frac{h_1}{t_1^2} = \frac{h_2}{t_2^2}\\\\(Note: h_1 = d, \ and \ t_1 = t)\\\\h_2 = \frac{h_1t_2^2}{t_1^2} \\\\h_2 = \frac{(d)(2t_1)^2}{t_1^2} \\\\h_2 = \frac{(d)(2t)^2}{t^2}\\\\h_2 = \frac{(d)\times 4t^2}{t^2}\\\\h_2 = 4d[/tex]
Therefore, when the time of fall is doubled, the height of fall will be quadrupled
Use the drop-down menus to complete the sentences. Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a . A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a .
Answer:
vestigial structure
Homologous structure
Explanation:
Did the assignment.
Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a vestigial structure.
A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a Homologous structure.
What is vestigial structure?
Some organisms have elements that seem to be left over from an earlier ancestor but have no apparent purpose. For instance, because they are evolved from reptiles with legs, certain snakes have pelvic bones despite not having any. The human vermiform appendix is another instance of a structure that serves no purpose.
Vestigial structures are these inactive, purposeless structures. Other examples of vestigial structures are the wings of flightless animals like the ostrich, the leaves of some cacti, the remains of whale pelvic bones, and the eyes that are blind in cave mammals.
Learn more about vestigial structure here:
https://brainly.com/question/29208010
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an aircraft landing on an air craft carrier is brought to a complete stop from an inital velocity of 215km/hr in 2.7 seconds. what is iys acceleration in m/s2
Which part of the drum vibrates when it produces sound?
Explanation:
For example, when a drum is struck, the flexible skin (sometimes called a membrane) of the drum vibrates. The compression and expansion of the air on either side of the vibrating membrane produces differences in air pressure. The pressure differences generate a sound wave that propagates outward from the drum surface.
name any one group one element in periodic table
Explanation:
first line is the group one element all are group 1 elements
What are the primary colors? What are the secondary colors?
Color Basics
Three Primary Colors (Ps): Red, Yellow, Blue.
Three Secondary Colors (S'): Orange, Green, Violet
Answer:
Color Basics
Three Primary Colors (Ps): Red, Yellow, Blue.
Three Secondary Colors (S'): Orange, Green, Violet.
Six Tertiary Colors (Ts): Red-Orange, Yellow-Orange, Yellow-Green, Blue-Green, Blue-Violet, Red-Violet, which are formed by mixing a primary with a secondary.
Explanation:
i added the tertiary colors just in case you need it hoped this helped
What is the critical angle for a ray trying to pass from glass (n = 1.52) into water (n = 1.33)? (Water n = 1.33, Air n = 1.00) (Unit = deg)
Answer:
59.52
Explanation:
59.5 in sigfigs
got it right on Acellus
Answer:
61.05
Explanation:
correct on acellus
When forces of 5 N and 7 N respectively act on an object. When will the resultant of the two vectors be at a maxium
Answer:
F = 12 N
Explanation:
Given that,
Force of 5 N and 7 N respectively act on an object.
We need to find the resultant of the two vectors be at a maximum.
Force will be maximum when two forces acts in same direction. It means we can simply add them i.e.
F = 5 N + 7 N
F = 12 N
Hence, the resultant force is 12N.
Sort the balloons based on the kinds of charges they carry.
first one is negative
second is none
third is posotive
last one is negative
left to right order
Answer:
Explanation:
thats the answer
Which landform is most likely formed from the destructive and constructive processes from wind forces?
A. Canyon
B.dunes
C. Mountain
D. Valley
Answer:
B.dunes
Explanation:
sand dunes are created by wind
The landform which is formed from the destructive and constructive processes of wind forces is dunes. Hence, option B is correct.
What is a landform?An anthropogenic or natural land feature on the solid surface of the Earth or another planetary body is referred to as a landform. A given terrain is made up of several landforms, and topography refers to how these landforms are arranged in the surrounding area. In addition to shoreline characteristics like bays, peninsulas, and seas, landforms also include hills, mountains, canyons, and valleys. Submerged structures like volcanoes, mid-ocean ridges, and major ocean basins are also considered to be landforms.
Physical characteristics of landforms, such as height, slope, orientation, stratification, rock exposure, and soil type, are used to classify them. Intuitive elements like berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and many more structural and size-scale elements, including different types of inland and marine waterbodies and sub-surface features, are all examples of gross physical features or landforms.
The landform made of wind are :
The erosional landform madeup of wind is Mushroom rock, zeugen, demoselles, yardang etc.
To get more information about landforms:
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guys please helpp!!!!1
Answer:
Position A/Position E
[tex]K = E[/tex], [tex]U = 0[/tex]
Position B/Position D
[tex]K = (1-x)\cdot E[/tex], [tex]U = x\cdot E[/tex], for [tex]0 < x < 1[/tex]
Position C
[tex]K = 0[/tex], [tex]U = E[/tex]
Explanation:
Let suppose that ball-Earth system represents a conservative system. By Principle of Energy Conservation, total energy ([tex]E[/tex]) is the sum of gravitational potential energy ([tex]U[/tex]) and translational kinetic energy ([tex]K[/tex]), all measured in joules. In addition, gravitational potential energy is directly proportional to height ([tex]h[/tex]) and translational kinetic energy is directly proportional to the square of velocity.
Besides, gravitational potential energy is increased at the expense of translational kinetric energy. Then, relative amounts at each position are described below:
Position A/Position E
[tex]K = E[/tex], [tex]U = 0[/tex]
Position B/Position D
[tex]K = (1-x)\cdot E[/tex], [tex]U = x\cdot E[/tex], for [tex]0 < x < 1[/tex]
Position C
[tex]K = 0[/tex], [tex]U = E[/tex]
A6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ?? cm.
Answer:
7.8cm
Explanation:
Answer:
7.8
Explanation:
50 POINTS!! BRAINLEST
Answer:
The lines are parallel and the students data is 13
Explanation:
The amount of salt added
Which type of energy is the result when a drum is hit with a drumstick?
OA. electrical energy
OB. light energy
OC.
sound energy
OD.
all of these
Reset
Submit
Answer:
That drummer has mechanical energy as he moves the drumsticks to hit the drums and cymbals. So I'm pretty sure it's OD. sound energy.
¯\_(ツ)_/¯¯
The s.I unit of R so that the equation velocity= R × density S dimensionally correct R is a constant
Answer:
R = m⁴/kg . s
Explanation:
In this case, the best way to solve this is working with the units in the expression.
The units of velocity (V) are m/s
The units of density (d) are kg/m³
And R is a constant
If the expression is:
V = R * d
Replacing the units and solving for R we have
m/s = kg/m³ * R
m * m³ / s = kg * R
R = m * m³ / kg . s
R = m⁴ / kg . sThis should be the units of R
Hope this helps
Which of the following is an example of the transformation of gravitational potential energy into motion energy (kinetic energy
A tire rolling along a level floor
A ball going up after being tossed into the air
gley
ve
A drop of water falling from a faucet into a sink
None of these because gravitational potential energy cannot be transformed into motion energy
Answer:
A drop of water falling from a faucet into a sink
SCIENCE
What does the nucleus of the cell control?
A. Life functions
B. Cell transport
C. Waste excretion
D. Energy production
Answer:
I believe A would be the best answer
Explanation:
Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane
Waste excretion is controlled by the vacuole
Energy production is the mitochondria (the mitochondria is the power house of the cell)
Life functions include cellular reproduction and the nucleus contains the genetic information to do this
Answer:
a
Explanation: