The weight of an object on Earth with a mass of 230 kg is 2256.3 newtons (n).
What is weight?The weight of an object is the force acting on the object due to the acceleration of gravity. It is defined as the vertical force experienced by a mass as a result of gravitation.
Weight is obtained from the product of mass and acceleration due to gravity (g). The object gets accelerated due to gravity when the object is in free fall. The value of g is 9.8 m/s².
From the given,
mass of an object = 230 kg
weight of an objcet=?
weight (w) = m×a, where m is the mass of the object and the unit of mass is the kilogram, a is the acceleration due to gravity and its unit is m/s², and w is the weight of the object and the unit of weight is Newton.
w = m×a
= 230×9.81
= 2256.3 N
w = 2256.3 N
Thus the weight of an object is 2256.3 N.
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Block 1 is sliding toward identical block 2 on a surface of negligible friction. In situation 1, after the two blocks collide, the block 1 stops and block 2 moves off to the right. It situation 2, the two blocks collide and stick together. Which of the following claims correctly describes the motion of the center of mass of the two-block system and provides reasoning for that claim?
In situation 1, the center of mass never changes its speed, because block 1 is moving before the collision, and block 2 is moving after the collision.
Answer A: In situation 1, the center of mass never changes its speed, because block 1 is moving before the collision, and block 2 is moving after the collision.
A
In situation 1, the center of mass never changes its speed, because there are no net external forces on the system before, during, or after the collision.
Answer B: In situation 1, the center of mass never changes its speed, because there are no net external forces on the system before, during, or after the collision.,
B
In situation 2, the center of mass slows down after the collision but continues to the right, because the blocks are always moving to the right.
Answer C: In situation 2, the center of mass slows down after the collision but continues to the right, because the blocks are always moving to the right.
C
In situation 2, the center of mass slows down after the collision but continues to the right, because the direction of motion of the center of mass never changes direction in a collision.
Answer D: In situation 2, the center of mass slows down after the collision but continues to the right, because the direction of motion of the center of mass never changes direction in a collision.
D
In situation 2, the center of mass has a zero velocity, because the velocity of the center of mass of the system is always zero.
Answer:
Explanation:
Situation 1 describes an elastic collision in which momentum is conserved while situation 2 is an inelastic collision in which momentum is not conserved.
When momentum is conserved, the speed of center of mass will not change. So the correct answer is Answer B: In situation 1, the center of mass never changes its speed, because there are no net external forces on the system before, during, or after the collision.
Answer:
A
Explanation:
Answer A: In situation 1, the center of mass never changes its speed, because block 1 is moving before the collision, and block 2 is moving after the collision.
In situation 1, the center of mass never changes its speed, because there are no net external forces on the system before, during, or after the collision.
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) The boy then walks to a village. The displacement from his starting point is (400, -50) m. How much gravitational potential energy did he lose going from the top of the hill to the village?
The boy would lose 25000 Joules going from the top of the hill to the village.
What is potential energy?Potential energy is the energy stored in an object as a result of its position in relative with another object. It is given by:
Potential energy = mass * acceleration due to gravity (g) * height.
g = 10 m/s²
Let us assume the boy has a weight of 50 kg. His starting point is (400, -50) m. This means the hill is 50 m high and 400 m from the village.
Potential energy = 50 * 10 * 50 = 25000 Joules
The boy would lose 25000 Joules going from the top of the hill to the village.
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FIGURE 4.1 shows a rectangular wire loop 0.3 m x 0.2 m moving horizontally to the right at 12 ms -1 in a uniform magnetic field of 0.8 T. The induced current in the wire is 3 A.
(i) Determine the resistance of the wire loop
(ii) Determine the direction of the induced current. Explain how you determine the direction of the induced current.
[tex]\underline{\underline{\large\bf{Solution:-}}}\\[/tex]
(I) Emf developed,E in the loop is given as:
[tex]\begin{gathered}\\\implies\quad \sf E = BLv \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf E = 0.8 \times 0.3 \times 12 \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf E = 2.88 V \\\end{gathered} [/tex]
[tex]\longrightarrow[/tex]I = E/R
[tex]\quad[/tex]R = E/I
where
R = resistanceE = Induced EMFI = Current[tex]\begin{gathered}\\\implies\quad \sf R = \frac{2.88}{3} \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \boxed{\sf{ R = 0.96 \;ohm}}\\\end{gathered} [/tex]
(ii) The direction of current induced is from P to Q which is given by B × V vector . It may also be explained by Lenz law. Since magnetic field is from S to N . The fingers of the right hand are placed around the wire so that the curling of fingers will show the direction of the magnetic field produced by the wire then the thumb points in the direction of current flow which is from P to Q.
The driver of a car driving at 72 km/h hits the brakes to stop the car. If the deceleration is 2.0 m/s², calculate the the time needed to stop the car.
HELP ASAP
Answer:
it is preaty simple
Explanation:
72/2=36
i hope, that helps, if no i'm sorry
Who will create a greater pressure, a heavy person standing on a bed or a lighter person lying on the bed? Explain your answer.
Answer:
a heavy person standing on a bed
Explanation:
The heavy person will have more mass than the lighter person, so they will create greater pressure.
greenhouse gases effect is caused primarily by which processes?
a- absorbing outgoing long wave radiation from the earth
b- absorbing incoming short wave solar energy.
c- heating of the earth stratosphere
d- blocking incoming short wave solar energy
What is the effect of using uranium on the environment? Please don’t search it up at any other website.
Answer:
Positives:
- The Electricity is Carbon-free
- The Power Stations have a 'Small Land Footprint' and a very High Power Output
Negatives:
- Can produce decay products which are harmful such as Nuclear Waste
- Non-renewable Source of Energy
Answer:
Uranium is radioactive
Explanation:
By using and enriching uranium you will expose the environment to EM radiation which is harmful to organisms, either through the uranium directly or through its waste products.
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance?
The work done on the mouse by air resistance is equal to 196 Joules.
Given the following data:
Mass = 200 grams to kg = 0.2 kg.
Distance = 100 meters.
Scientific data:
Acceleration due to gravity = 9.8 [tex]m/s^2[/tex]
How to calculate work done.In Science, work done is generally calculated by multiplying force and the vertical distance or displacement experienced by an object.
Mathematically, work done is given by the formula:
[tex]Work\;done = force \times displacement = mgh[/tex]
Substituting the given parameters into the formula, we have;
[tex]Work\;done = 0.2 \times 9.8 \times 100[/tex]
Work done = 196 Joules.
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There are two bulb with different watts. A bulb has heigher wattage than B.
Which will shine brighter in :-
series
parallel
An object is 3.0 cm from a concave mirror, with a focal length of 1.5 cm. Calculate the image distance. Remember to include your data, equation, and work when solving this problem. A concave mirror is shown with curvature positioned at 8 on a ruler that goes from 0 to 14 centimeters. The object is located at 5, and the focal point is located at 6.5.
This question involves the concepts of focal length and mirror formula.
The image distance will be "1 cm".
MIRROR FORMULAThe mirror formula relates the focal length, image distance, and object distance through the following formula:
[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]
where,
f = focal length =1.5 cmp = object distance = 3 cmq = image disance = ?Therefore.
[tex]\frac{1}{1.5\ cm}=\frac{1}{3\ cm}+\frac{1}{q}\\\\\frac{1}{1.5\ cm}-\frac{1}{3\ cm}=\frac{1}{q}\\\\0.667 + 0.333 = \frac{1}{q}\\\\[/tex]
q = 1 cm
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Answer:
The image distance is 3.0 cm
Explanation:
Object distance: 3.0 cm Focal length: 1.5 cm Image distance: ? cm
1/f=(1/ do）+（1/di)
1/1.5=(1/3.0)+(1/x)
(2/3)-(1/3)=1/x
1/3=1/x
x=3.0 cm
The image distance is 3.0 cm.
A ball is moving up a hill at 20 meters per second, and is decelerating at a uniform rate of 2 meters per second squared. What is its velocity after 5 seconds? Assume the direction up the hill is positive.
Answer:
-12meters per secondExplanation:
2^5=32-20=-12 meters per sec (going backwards).
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A _________________ is one that forms where rays converge
Answer:
real image
I hope this helps you
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I need at least 20 lab safety hazards listed from this picture and I’m so lazy
Answer:
1. messy
2. unorganized
3. dangerous
4. not a safe place
5. chemicals everywhere
6. hazardous
7. no adult in room
8. no guidance
9. children do not know what their doing
10. sharp objects
11.messing around
12. child messing around on high areas
13. can cause dangerous chemical reactions
15.adult may not know the children are in the room
16 the adult may be irresponsible
17.do not have experience
18. unprofessional
19. may get adult in trouble
20. is responsible or may not be.
Which of the following is not a sub-discipline of basic sciences?
a.
Physics
b.
Chemistry
c.
Mathematics
d.
Logic
Answer:
D
Explanation:
Physics and Chemistry are the most basic disciples in science, so the answer is not A or B.
Mathematics is the language of science; it could be the answer.
Most likely, you are looking for logic which describes the validity of an argument that has already been developed. I would pick D, but your marker may not agree.
Which of the following would you expect to
be a strong electrolyte in solution?
(a) H2O
(b) HCI
(c) sugar
(d) alcohol
Answer:
HCI
Explanation:
HCI is a strong electrolyte and an acid.
A 6 volt battery delivers 48 watts to two identical light bulbs that are connected in parallel. Determine the resistance of each bulb.
Answer: 0.75 Ohms
Explanation:
Use the Joule heating law stating that the power is equal to the square of the voltage over the resistance:
[tex]P=V^2/R[/tex]
Plug everything in:
[tex]48=(6^2)/R[/tex]
[tex]R=6^2/48[/tex]
[tex]R=36/48=0.75[/tex]
The Himalayan mountains at the border of the Indo-Australian
and Eurasian plates is caused by a _________ boundary.
A. conservative
B. collision
C. constructive
D. destructive
explain 4 factors affecting centripetal acceleration
Answer:
it's speed
mass of the object
and the radius of the circle
the period of a pendulum is measured to be 3.00s in the refrence frame of the pendulum.what is the period when measured by an observer moving at a speed of 0.960c relative to the pendulum?
Answer:
Δt = Δτ / (1 - β^2)1/2
Δt is the time observed
Δτ is the proper time (3.00 s)
β = v / c = .96
Δt = 3.00 / (1 - .96^2)^1/2 = 10.7 sec
please help oooooooo
Answer: Can't see clearly.
Explanation:
2. A digital camera records each image as 8 megapixels, with each pixel transferring 14 bits of information. What is the minimum capacity for a memory card which could hold 120 images?
Given what we know, we can confirm that due to its relatively low image quality, any memory card with at least one MB will be sufficient to hold the 120 images taken.
Why is one MB enough?The photos are taken at 8 megapixels, with each one occupying 14 bits of information. A megabit consists of one million bits of potential storage. Therefore, the 120 pictures will occupy roughly 1% of the available storage of a 1 MB memory card.
Therefore, we can confirm that due to its relatively low image quality, any memory card with at least one MB will be sufficient to hold the 120 images taken.
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The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.27 rad/s^2. It accelerates for 27.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 66.1 s after it begins rotating.
With a constant angular acceleration of 1.27 rad/s^2 and acceleration of 27.5 s, is mathematically given as
[tex]\theta = 1848 radians[/tex]
What is the total angle through which the wheel has turned 66.1 s after it begins rotating?Generally, the angular velocity is mathematically given as
w2 = 0 + 1.27*27.9
w2 = 35.43 rad/s
Therefore
[tex]\theta1 = 0.5*1.27*27.9*27.9[/tex]
[tex]\theta2 = w2*(66.1-27.9)\\\\\ \theta = \theta1 + \theta2[/tex]
[tex]\theta = 1848 radians[/tex]
In conclusion, the total angle is
[tex]\theta = 1848 radians[/tex]
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Dolphins communicate underwater using sound waves. This is called ________.
A. waving
B. radar
C. wave sensing
D. echolocation
Answer:
D. echolocation
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Answer:
D. echolocation
Explanation:
Dolphins communicate underwater using sound waves. This is called echolocation
Sally is investigating electromagnets. She is going to change the number of turns on the coil of
wire and investigate how this affects the strength of the electromagnet.
a I Name one variable Sally must keep the same each time she tests her electromagnet.
Answer:
The number of turns in a coil
Explanation:
A hurricane that has winds between 74 and 95 miles per hour and causes some damage would be classified as a Category _______ storm.
1
3
2
4
Answer:
Category 1
Explanation:
I hope this helps
Answer: CAT-1
Explanation:
If the mass of a car is 1,100 kg and its momentum is 22,000 kg
m/s, then what is its velocity?
The velocity of the car will be [tex]V=18.18\ \frac{m}{s}[/tex]
What will be the velocity of the car?As velocity is the movement of the car with respect to time.
It is given that
Mass m = 1100kg
Momentum= 22000 [tex]\frac{kgm}{s}[/tex]
The momentum is given as
[tex]P=mv[/tex]
[tex]v=\dfrac{p}{m}[/tex]
[tex]v=\dfrac{22000}{1100} =18.18 \ \dfrac{m}{s}[/tex]
Thus the velocity of the car will be [tex]V=18.18\ \frac{m}{s}[/tex]
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Competition in the Los Angeles Flower District results in
higher floral prices
better quality flowers
poor customer service
Competition in the Los Angeles Flower District results in better quality flowers.
Why quality is the standard in flower competition?Competition results in better quality flowers because in the competition, best quality of flowers will be selected as a winner so the competitors produces best quality of flowers in order to claim the prize so we can conclude that Competition in the Los Angeles Flower District results in better quality flowers
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In a footrace between two runners, is it possible for the second-place finisher have a greater speed
at the finish line than the winner?
Answer:
no
Explanation:
this may be wrong, but i would assume no because they have to cover the same distance therefore the faster runner would cross the finish line first.
what is the formular for kinetic friction
Answer:
Kinetic friction is related to the normal force N by f k = μ k N f k = μ k N ; thus, we can find the coefficient of kinetic friction if we can find the normal force on the skier
Explanation:
what is photography ??
Answer:
Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
Explanation:
In the definition of photography:
the art or process of producing images by the action of radiant energy and especially light on a sensitive surface (such as film or an optical sensor)
Purpose of photography:
To communicate and document moments in time.
Explanation:
When you take a photograph and share it with others, you're showing a moment that was frozen through a picture. This moment can tell someone many things, from the environment to what people are doing.
Hope this helps you.
Answer:
It's an art or an application of clicking photos .