Answer:Learn what gravitational potential energy means and how to calculate it. ... a pulley and rope, so the force due to lifting the box and the force due to gravity, ... would be used by an elevator lifting a 75 kg person through a height of 50 m if the ... When you are close to a planet you are effectively bound to the planet by gravity ..
Explanation:
11. How much work is required to increase the kinetic energy of an object from 600 J to 1800
J?
a) 1200 J
b) 2400 J
c) 3 J
Carol tries to push a bookshelf across the room. As much as she tries, she can not get the bookshelf to move. Which statement best describes why the
bookshelf is not moving?
O
A Carol did not apply enough force to the bookshelf and so the forces are unbalanced.
B. Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
0
C. Carol applied too much force to the bookshelf and now the forces on the bookshelf are balanced
D. Carol applied too much force to the bookshelf and now the forces on the bookshelf are unbalanced
Answer:
B.
Explanation:
Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
Hope this helps!! :)
When a ringing bell is caught with hands the sound ceases why
A train car of mass 16,500 kg moves along the railroad track with a constant speed of 14 m/s. What is the momentum of the car?
Answer:
231000kgm/s
Explanation:
Given parameters:
Mass of train car = 16500kg
Constant speed = 14m/s
Unknown:
Momentum of the car = ?
Solution:
To solve this problem, we must understand that the momentum of a body is the quantity of motion a body possess.
So;
Momentum = mass x velocity
Momentum = 16500 x 14 = 231000kgm/s
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
A. 1 000 J
B. 200 J
C. 2 000 J
D. Cannot be determined
Answer:
[tex]\boxed {\boxed {\sf A. \ 1000 \ Joules}}[/tex]
Explanation:
Kinetic energy can be found using the following formula.
[tex]E_k=\frac{1}{2}mv^2[/tex]
where m is the mass and v is the velocity.
The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.
[tex]m= 20 \ kg \\v= 10 \ m/s \\[/tex]
Substitute the values into the formula.
[tex]E_k=\frac{1}{2}(20 \ kg) (10 \ m/s)^2[/tex]
Solve the exponent first.
(10 m/s)²= 10 m/s *10 m/s= 100 m²/s²[tex]E_k=\frac{1}{2} (20 \ kg) (100 \ m^2/s^2)[/tex]
Multiply the last two numbers together.
[tex]E_k= \frac{1}{2}(2000 \ kg*m^2/s^2)[/tex]
Multiply by 1/2 or divide by 2.
[tex]E_k= 1000 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second is equal to 1 Joule. Our answer of 1000 kg*m²/s² is equal to 1000 Joules[tex]E_k= 1000 \ J[/tex]
The kinetic energy of the toy plane is 1000 Joules
a truck is moving at a constant speed of 46m/s. What is its acceleration?
Answer:
the distance from point C to D is 7.75m
Explanation:
1. When an object is not in motion, what is the sum of the forces acting upon that object?
2. How can forces cause an object to move, change direction, or stop?
3. In a baseball game, a batter is determined to hit a home run. Describe the motion needed from the batter to achieve this goal.
Answers needed ASAP, class in 30 minutes.
Answer:
Net external force is the sum of all of the forcing acting on an object. Just because there are forces acting on an object doesn't necessarily mean that there is a net external force; forces that are equal in magnitude but acting in opposite directions can cancel one another out.
Explanation:
Answer:
Kk so your answers are: 1 is The sum of all the forces acting on an object is the net force or resultant force. If all the forces cancel out, the resultant force is zero, else, the unbalanced force will cause acceleration of the object. Force is a vector and hence has both a direction and magnitude. 2 is Depending on the magnitude and direction of the force, it can cause an object to move, stop or change direction. For example, in baseball a pitcher throws the ball with a certain speed towards the hitter, who hits it, thus applying a force to it. and 3 is friction.
Explanation:
Make sure to mark as brainliest, and a tip: Try to reword these so its not copy and pasting from the internet!
Describe reflection using the terms incident ray and reflected ray.
10 points fast
10 POINTS ASAP
Answer:
The normal line divides the angle between the incident ray and the reflected ray into two equal angles. ... The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
The law of reflection is the idea that when light rays strike a smooth surface, the angle of incidence and the angle of reflection are both identical. Additionally, the incident ray, the reflected ray, and the surface normal all reside in the same plane.
What is reflection?Reflection of light refers to the act of light rays hitting a surface and reflecting back.
According to the law of reflection, the angle of the reflected ray, when reflecting from a smooth surface, is equal to the angle of the incident ray, with regard to the surface's normal, which is a line perpendicular to the surface at the point of contact.At the point of contact of the incident ray, the reflected ray is always in the plane defined by the incident ray and the normal to the surface.The law of reflection explains how both curved and planar mirrors form images.
Learn more about reflection here:
https://brainly.com/question/28969632
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what happens to the electrons of an element on the left side of the periodic table when it forms an ion? what happens to the right?
Determine the number of turns of the primary winding of a transformer connected to a voltage of 380 V, if the number of turns of the secondary winding is 200 and the output voltage is 19 V.
Answer:
4000 turns
Explanation:
The formula to apply is ;
Voltage in secondary coil/ Voltage in primary coil = Turns on secondary coil/Turns in primary coil
Vs/Vp =Ns/Np
Given that;
Ns=200
Vp=380 V
Vs=19 V
Applying the formula as;
Vs/Vp = Ns/Np
19/380 = 200/Np
1/20 =200/Np
Np = 200/0.05
Np= 4000 turns
Pls help will mark brainliest
Answer: The pattern of the battery is wrong, the bulb is broken , the wires of the circuit is broken , the switch is not closed .
Answer:
circle the open switch on the right (it is open so the circuit is broken), the break in the wire on the left, opposite the switch (wire is broken so the circuit cannot continue) and on the left side of the bulb (bulb isn't fully connected so the circuit cannot continue). i think this is correct but my explanations may be a bit off, so just see where this takes you. hope it helps.
Which is an example of a solution?
OA.
flour and water
B.
sand and water
C.
salt and water
D.
oil and water
E.
ice and water
Answer:
C
Explanation:
plato
Answer:
c. Salt and Water
Explanation:
An aquarium has a volume of 2.75 cubic
meters. How many liters of water can the
aquarium hold?
Select the correct answer. How many sets make up a game in volleyball? ОА. Two OB. Three or Five Ос. Four or Six OD One
5 sets
Explanation:
Matches are played best of five sets. The first four sets are played to 25 points, with the final set being played to 15 points. A team must win a set by two points. There is no ceiling, so a set continues until one of the teams gains a two-point advantage. Previously, all sets were to 15 points, with the first four sets having a ceiling of 17 and the final set requiring at least a two-point winning advantage.
A cannonball is fired from ground level at an angle of 60.0 ° above horizontal at a speed of 72.5 m/s. What is the horizontal component of the velocity at the time of launch?
Answer:
A cannon ball is fired with an initial velocity of 100.0 m/s at an angle ... resolve the initial velocity into its vertical and horizontal components. ... Yet another way would be to calculate the time it takes for the object
Explanation:
Which statement BEST describes the relationship between our Solar System and the Milky Way galaxy?
A)Our Solar System is located in the center of the Milky Way galaxy.
B)The Milky Way galaxy is located in the center of our Solar System.
C)The Milky Way galaxy is located in the outer area of one of the orbits in our Solar System.
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Answer:
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Explanation:
Our solar system is one of millions of solar systems found in our galaxy, the Milky Way.
Hope that helps!
Have a great day! :D
The relationship between our Solar System and the Milky Way galaxy is option d. Our Solar System is located in the outer area.
Relationship between our Solar System and the Milky Way galaxy:The earth orbited the sun, so the solar system that orbited the center of the milky way.
Also, it does have solar system nearest to the 250 million for finishing the single revolution.
Hence, the option d is correct.
Learn more about solar here: https://brainly.com/question/12004410
A car's engine provides a driving force of 30N. The car travels at a steady speed of 20m/s. What is the size of the resistive force acting against the driving force?
Answer:
30 N
Explanation:
Since the car travels at a steady speed of 20m/s and has a driving force of 30N, there is no net acceleration and thus, the resistive force is also 30 N in magnitude but in the opposite direction to the driving force. This is shown below.
F - f = f' where F = driving force = 30 N. f = resistive force and f'= net force.
f' = 0 since there is no acceleration. So,
F - f = 0
F = f = 30 N
The right answer is "30 N"
Answer explanation:
If a car is travelling at a steady speed, the resultant force must be zero, so the driving force and resistive force must be equal and opposite.
Hope it helps
Why VR of second class lever is greater than 1?
Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm. It multiplies force. ... It does not multiply force but changes the direction of force.
What quantity is the sum of the kinetic energy and all forms of potential
energy in a system?
can someone answer these two questions? thanks
The number of calories consumed must equal the number of calories burned.
A. true
B. false
Answer:
I think that is true not sure
Humans landed on moon for the first time in 1969. Which of these statements best
explains why humans should continue to send manned missions to moon?
A. They prove all current facts about moon incorrect.
B. They supress cold war between different countries.
C. They help discard some myths about moon.
D. They increase human resistance to extreme conditions.
thanks so much y’all <3
Answer:
D
Explanation:
Which type of electromagnetic wave has more energy than ultraviolet waves
have?
O A. Visible light
B. Infrared
O C. X-rays
O D. Microwaves
Answer: C. X-Rays
Explanation:
Answer:
C I am pretty sure
Explanation:
Image below
1.) What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 grams in 21.6 seconds?
Answer:
There the first one
Explanation:
how can being near a large body of water affect the climate of the region?
Answer:
yes
Explanation:
If you've ever heard of lake effect snow that is when cold air mass moves across long expanses of warmer lake water. The lower layer of air, heated up by the lake water, picks up water vapor from the lake and rises up through the colder air above; the vapor then freezes and is deposited on the leeward (downwind) shore. this is most common with lake Michigan when cold air travels down from Canada making the neighboring states colder, so YES, being near any body of water can effect the climate.
I hope this helps
Answer:
Explanation:
Hurricane winds whip up large
waves in the ocean. These waves cause
a bulge of water in the ocean known
as a storm surge (stawrm surj). As
a storm moves over a coast, the
storm surge can cause water levels to
suddenly rise, or surge, several meters.
The main dangers in a hurricane
are flying objects, strong winds, and
flooding. If possible, leave areas
threatened by a hurricane. Take
prescription medicines with you.
If you stay in a building, board up
windows and stay away from windows
and doors. Store food, bottled water,
flashlights, and battery operated
radios. Stay away from beaches
and areas that may become flooded
can somebody help me with this please ?
Answer:
Speed = Distance by Time
so, 105/5
= 21 km/hr
Explanation:
hope it helps....
an object is dropped from the top of a building which is 75 meters high. what's it's velocity before it reaches ground
Hi there! :)
[tex]\large\boxed{38.34 m/s}[/tex]
Use the following kinematic equation to solve:
[tex]v_{f}^{2} = v_{i}^{2} + 2ad[/tex]
Where:
vf = final velocity (?)
vi = initial velocity (0 m/s, object started at rest)
a = acceleration (gravity = 9.8 m/s)
d = distance travelled (75 m)
Plug in the given values into the equation:
[tex]v_{f}^{2} = 0^{2} + 2(9.8)(75)[/tex]
Simplify:
[tex]v_{f}^{2} = 2(9.8)(75)\\\\v_{f}^{2} = 1470[/tex]
Take the square root of both sides:
[tex]v_{f} = \sqrt{1470} = 38.34 m/s[/tex]
what is a similarity between air pressure and temperature in the troposphere
Answer:
The temperatures
Explanation:
Heat rises
Sarah drives her car with a constant speed of 64 km/h. How long will she take to travel a
distance of 173.6 kilometers? Round to the nearest TENTH
Answer:
2.7
Explanation:
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Find the slope of the line that passes through the points (-1, 3) and (2, -5)-
Answer:
m=−8/3
Explanation:
Answer:
-8/3
Explanation:
Slope m= y2-y1/ x2- x1