Answer:
0.45m/s
Explanation:
Given parameters:
Distance = 1.8m
Time = 4s
Unknown:
Speed of the car = ?
Solution:
The speed of a body is the distance divided by the time.
Speed = [tex]\frac{distance}{time}[/tex]
So;
Speed = [tex]\frac{1.8}{4}[/tex] = 0.45m/s
Q2) A salesman travels a distance of 50km in 2 hours and 30 minutes. How much faster, in kilometers per hours, on an average, must he travel to make a trip in 5/6 hours less time)
A) 10
B) 20
C) 30
D) None of these
Explain how you got your answer
Answer:
30 maybe?
Explanation:
Answer:- 30 km/hr
Given :- Distance covered by Salesman 50 km
Time taken;- 2 hrs and 30 minutes
Speed of salesman: Distance/ time taken
50 / 2 1/2 = 20 km/hr
He has make it 5/6 less
2 1/2 —5 / 6 = 5 / 3 hrs
Speed : Distance / Time
50 km / 5/3 = 30
He has to travel at 30 km per hour.
The primary cause of weather is due to ______
in temperature around the Earth.
differences
similarities
coldness
abnormalities
Answer:
the answer is differences hope this helped :)
The main cause of weather is differences in temperature around the Earth.
What is the Weather?The weather could define the atmosphere. It could be either hot, cold, cloudy, or stormy. In the case of the earth, the phenomena of weather should arise at the bottom layer of the planet's atmosphere. Due to this, the main cause of the weather should be of differences.
learn more about earth here: https://brainly.com/question/17252385
Newton’s second law: The acceleration (a) of an object is directly proportional to the force on the object (F) and inversely proportional to its mass (m).
F < The greater the force, the greater the acceleration
a = -- OR F=ma
M< The greater the mass the less the acceleration
Answer:
there is the answer
Explanation:
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
What are atoms doing that cause fireworks to change colors
Answer:
Heating atoms causes electrons to move from their ground-energy level to a higher energy level. When the excited electrons move to a lower energy level, they emit light with a specific energy and characteristic color.
Explanation:
Look it up
A distinct chemical reaction leads to the varied colors we perceive. Below you may find a further explanation.
The colors of explosions generated through the usage of metal salts were indeed distinct from table salts as well as chemical 'salt' corresponds toward any metallic or non-metallic compound's atomic complex.Several of these chemicals generate strong burning colors, making them suitable for explosives materials.Learn more about atoms here:
https://brainly.com/question/18327624
The planet Mars is located 228 million kilometers (2.28 x 1011 m) away from the sun. If it takes the sun light 760 seconds does light take to reach Mars from the Sun, how fast is the light travelling?
Answer: hey
Explanation:
The question is in the photo
Would you do more work moving 100 boxes weighing 12N for 1m or moving a 1000N box, 30cm? Support your answer.
Answer:
The second box
Explanation:
Work done is the force applied to move a body through a particular distance.
Work done = Force x distance
For the first box:
Weight = 12N
Distance = 1m
Work done = 12 x 1 = 12J
For the second box;
Weight = 1000N
Distance = 30cm = 0.3m
Work done = 1000 x 0.3 = 300J
The second box has a higher work done.
Which object forms by the contraction of a large sphere
of gases causing the nuclear fusion of lighter elements
into heavier elements?
A box is pulled along a floor by a force of 3.0 N. The friction acting on the box is 1.0 N, as shown. How much kinetic energy does the box gain in moving 2.0 m
Answer:
4 J
Explanation:
From the image attached, we can see 2 horizontal forces acting on the box albeit in opposite directions.
Now, the net force will be;
F_net = 3 - 1
F_net = 2 N
To move a distance of 2 metres, kinetic energy is;
K.E = Force × Distance = 2 × 2 = 4 J
Please do #24
24. What is the benefit the Hubble’s ability to detect infrared radiation?
Answer:
i think its D Or maybe C not sure rly
The center of mass of a cow and the center of mass of a tractor are 208 meters apart. The magnitude of the gravitational force of attraction between these two objects is calculated to be 1.8 × 10-9 newtons.
What would the magnitude of the gravitational force of attraction be between these two objects if they were 416 meters apart?
A.
1.62 × 10-9 newtons
B.
3.6 × 10-10 newtons
C.
9 × 10-10 newtons
D.
4.5 × 10-10 newtons
Answer:
Choice: D.
Explanation:
Newton’s Law of Universal Gravitation
It states that objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance between them. The formula is:
[tex]\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]
Where:
m1 = mass of object 1
m2 = mass of object 2
r = distance between the objects' center of masses
G = gravitational constant: [tex]6.67\cdot 10^{-11}~Nw*m^2/Kg^2[/tex]
The center of mass of a cow is at a distance of r=208 m from the center of the mass of a tractor. The gravitational force of attraction is [tex]F=1.8\cdot 10^{-9}\ N[/tex]. It's required to find the new force of attraction F' if the distance was r'=416 m.
It can be noted that r'=2r. If the distance is doubled, the new force is:
[tex]\displaystyle F'=G{\frac {m_{1}m_{2}}{(2r)^{2}}}[/tex]
[tex]\displaystyle F'=\frac{1}{4}G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]
Substituting the original value of F:
[tex]\displaystyle F'=\frac{1}{4}\cdot 1.8\cdot 10^{-9}\ N[/tex]
Operating:
[tex]\displaystyle F'=4.5\cdot 10^{-10}\ N[/tex]
Choice: D.
A box that weight 1000 N is lifted a distance of 20.0 m straight up by a rope and pulley system . The work is done in 10.0 seconds what is the power devloped
Answer:
P = 2,000 W
Explanation:
Work and Power
Work is the amount of energy transferred by a force over a distance. It's a scalar quantity, with SI units of joules.
If both the force F and displacement s are parallel, then we can use the equivalent scalar formula:
W=F.s
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
[tex]\displaystyle P=\frac {W}{t}[/tex]
Where W is the work and t is the time.
A box with a weight of 1,000N is lifted by s=20 m by a rope and pulley system. The system exerts a force equal to the weight of the box, thus F=1,000 N. The work done by the system is:
W =1,000 N * 20 m
W = 20,000 J
Now we calculate the power developed by the system in t=10 seconds:
[tex]\displaystyle P=\frac {20,000}{10}[/tex]
P = 2,000 W
How long does it take a earth to rotate on its axis?
Answer:
23 hours, 56 minutes about 24 hours
Explanation:
(Im sorry if this is wrong please correct me if so. Good Luck)
A car accelerates from rest in a straight line. During the first 14s, the acceleration is uniform and the car reaches the speed of 25m/s. Calculate the acceleration of the car.
Answer:
25/14 ms-1
Explanation:
apply V=U+AT
true or false
one ton is equal to 10 quintal
Answer:
True
Explanation:
1 ton = 10 quintals
A 7.2 kg bowling ball is accelerated with a force of 112,5 N.
What is the acceleration of the bowling ball?
Answer:
15.625 m/s
Explanation:
112.5/7.2 = 15.625 m/s
HELP PLZ!!! what’s the answer?
A geosynchronous orbit is an orbit in which the satellite remains over the same spot on the planet
Answer:
Yes, the electromagnet still affects the compass needle.Explanation:
the electromagnet still affects the compass needle.Which best describes how energy transferred from an electron in the solar wind compares with energy absorbed by an electron in the oxygen atom?
equal to
less than
No energy is transferred.
greater than
Answer:
equal to
(sorry if this is late)
Explanation:
Rest of the answers.
As solar wind approaches Earth, what happens to the charged electrons?
They are deflected as Earth’s magnetic field exerts force on them.
Which best describes how energy transferred from an electron in the solar wind compares with energy absorbed by an electron in the oxygen atom?
equal to
Which statement is accurate about how the aurora borealis is formed?
When the electrons fall to a lower energy state, they release energy as electromagnetic radiation, light.
How does the energy in the light of the aurora borealis compare to the energy as an excited electron returns to its original energy level?
equal to
During the formation of the aurora borealis, the electrons in an atom experience a change in energy levels. Which statement about this change is accurate?
First, the electron absorbs energy to move to a higher energy level.
The energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.
What is energy transformation?Energy transformation is the process of changing energy from one form to another form.
Energy transferred from an electron in the solar wind-The solar wind is a hot and paced flow of magnetized gas that streams away from the sun's atmosphere.Energy absorbed by an electron in the oxygen atom-A part of energy is the spent for the kinetic energy with which the electron is moving.It is known that the energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.
Hence the energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.
Learn more about the transformation of energy here:
https://brainly.com/question/17448762
what would happen if you try to put two balloons with the same charge together
Answer:
they would repel because they have the same charge. Charges that are different will stick together.
Please help me
An automobile is driving uphill. Which form of energy is not involved in this process?
electromagnetic
potential
kinetic
chemical
An automobile is driving uphill. Which form of energy is not involved in this process?
Choosing:electromagnetic
potential
kinetic
chemical
Answer:Electromagnetic
#READINGHELPSWITHLEARNING #CARRYONLEARNING #STUDYWELLAnswer:Electromagnetic said the person above me wait AYO HEAR ME OUT-
In which of the following would you find the highest population density?
Question 1 options:
A. In a region with little to no rainfall
B. Along the Amazon River
C. In the peak of the Andes Mountain
D. In the Atacama Desert
get the right answer and i will give you points
I would think B, along the Amazon River. This is because of the warm climate ad lots of rainfall.
Which of the following diagrams correctly shows the electron configuration of Sulfur, with atomic number 16?
Diagram A
Diagram B
Diagram C
Diagram D
Answer:
Diagram C
Explanation:
We are given that Sulfur with atomic number 16.
We have to find that which diagram shows the electronic configuration of sulfur.
S=16
Its Diagram C
These types of electromagnetic waves are listed in order of decreasing
frequency: gamma rays, visible light, infrared, and radio. Which type has the
greatest energy?
A. Radio
B. Infrared
C. Visible light
D. Gamma rays
Can you answer my questions. Please help me
Answer:
answered it.................
a sound wave has a frequency of 20 Hz and a wavelength of 100 m. what is the wave speed? a) 2000m/s b) 100m/s c)50 m/s d)0.20 m/s
Answer:
A. 2000 m/s
Explanation:
Calculate the speed of a car that travels 250 miles in 4.0 hours. (remember your unit)
I NEED HELP ASAP PLEASE!
Question 6 of 10
What is the slope of the line plotted below?
O A. 1
O B. -0.5
O C. 0.5
O D. 2
What does the number of valence electrons an atom has have to do with whether the atom
will gain electrons or lose electrons?
Answer:
A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.
Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.
Explanation:
Hope it helps
blank is a measure of the percentage of water vapor in the air in a particular area
a. temperature
b. dew
c.point
d. relative humidity
Answer:
Relative humidity is a measure of the percentage of water vapor in the air in a particular area
Answer: relative humidity
Explanation:
