Answer:
45
Explanation:
The average speed of the train was 5.33 meter/second.
What is speed?Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.
Given parameters:
Distance travelled by the train is: d = 80 meters.
Time taken by the train: t = 15 seconds.
Hence, the average speed of the train =
total distance travelled/total time taken
= 80 meters/ 15 seconds.
= 5.33 meter/second.
Learn more about speed here:
https://brainly.com/question/28224010
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Will the sun explode in future?
Answer:
Explanation:
The Sun won't explode. ... Eventually (in five or seven billion years time), the Sun's life will come to an end. Our star will swell up, becoming something called a “Red Giant” star. It might even get so big that it swallows the Earth whole.
True or False? Convection in the inner core causes the solid layers like the lithosphere to move and cause earthquakes
Answer:
True
Explanation:
Hope it help
Mark me as brainliest
Answer:
True
Explanation:
!mark me as brainliest
A stone is thrown upwards from the edge of a cliff with a speed of 5.0 ms. It hits the
ground 2.0 s later. What is the height of the cliff?
If you can provide some explanation I will greatly appreciate it.
Answer:
3.0 would be it
Explanation:
Because if you think bout it the 5.0 negative 2.0 is 3.0
The rebounder in basketball has a vertical leap (that is, the vertical movement of a fixed point on their body) of 106 cm .
Answer:
[tex]u = 4.56m/s[/tex]
[tex]T = 0.94s[/tex]
Explanation:
See comment for complete question
Given
[tex]h = 106cm[/tex] --- Height
Solving (a): The initial speed
To do this, we make use of the third equation of motion
[tex]v^2=u^2+2ah[/tex]
In this case:
[tex]v = 0m/s[/tex] --- final velocity at the maximum height
[tex]a = -g = -9.8m/s^2[/tex]
[tex]h = 106cm[/tex]
Convert height to metres
[tex]h = 1.06m[/tex]
Substitute these values in [tex]v^2=u^2+2ah[/tex]
[tex]0^2 = u^2 +2 *(-9.8) * 1.06[/tex]
[tex]0^2 = u^2 -20.776[/tex]
Collect Like Terms
[tex]u^2 =20.776[/tex]
Take the positive square root of both sides
[tex]u =\sqrt{20.776[/tex]
[tex]u = 4.55806976691[/tex]
[tex]u = 4.56m/s[/tex] --- approximated
Hence, the initial velocity is 4.56m/s
Solving (b): Time spent in the air.
This will be solved using the first equation of motion.
[tex]v = u + at[/tex]
Where:
[tex]v = 0m/s[/tex] --- final velocity at the maximum height
[tex]a = -g = -9.8m/s^2[/tex]
[tex]u = 4.56m/s[/tex]
So, we have:
[tex]0 = 4.56 - 9.8t[/tex]
Collect Like Terms
[tex]9.8t = 4.56[/tex]
Make t the subject
[tex]t = \frac{4.56}{9.8}[/tex]
[tex]t = 0.46530612244[/tex]
[tex]t = 0.47s[/tex] --- approximated
The above is the time it reaches the maximum height.
The time it stays in the air is:
[tex]T = 2t[/tex]
This gives:
[tex]T = 2*0.47s[/tex]
[tex]T = 0.94s[/tex]
What does AS>0 mean?|
I
Answer:
Significant Other
Explanation:
that comes to mind when I see that
Which diagram best represents the field around a positively charged particle?
An object accelerates at 8 m/s^2 when a force of 40 Newtons is
applied to it. What is the mass of the object? (Use formula: m=Fla)
Answer:
5 kg
Explanation:
Acceleration = 8 m/s^2
Force = 40 N
Force = mass * acceleration
mass = force / acceleration
mass = 40 / 8
mass = 5 kg
1. If two objects each with the mass of 2.0 x 10^2 kg, produce gravitational force between
them of 3.7 x 10^-6N , What is the distance between them ?
Answer:
r = 0.849 m
Explanation:
Given that,
The masses of two objects, [tex]m_1=m_2=2\times 10^2\ kg[/tex]
The force between the objects, [tex]F=3.7\times 10^{-6}\ N[/tex]
We need to find the distance between the masses. The force between two objects is given by the relation as follows :
[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]
r is the distance between them
[tex]r=\sqrt{\dfrac{Gm_1m_2}{F}} \\\\r=\sqrt{\dfrac{6.67\times 10^{-11}\times (2\times 10^2)^2}{3.7\times 10^{-6}}} \\\\r=0.849\ m[/tex]
So, the distance between them is 0.849 m.
Which of the following is required for U.S. citizens to travel outside the United States?
A. Consul
B. Embassy
C. Passports
D. Visas
Answer:
C.
Explanation:
12. In which of the positions shown in the picture, will Joshua have both potential and kinetic energy?
Answer:
Answer: D. Only R
Explanation:
The Principle Of Conservation Of Mechanical Energy
In the absence of friction, the total mechanical energy is conserved. That means that
Em=U+K is constant, being U the potential energy and K the kinetic energy.
At the top of the path (point Q), Joshua is at rest but his height is at a maximum. Thus his kinetic energy is zero.
At point P, Joshua is at the minimum level (potential energy zero) and his speed is at a maximum.
At point R, Joshua has some height and some speed which means he has both types of energy.
Answer: D. Only R
A motorcycle cop, parked at the side of a highway reading a magazine, is passed by a woman in a red Ferrari 308 GTS doing 120.0 km/h. After a few attempts to get his cycle started, the officer roars off 2.00 s later. At what average rate must he accelerate if 159 km/h is his top speed and he is to catch her just at the state line 3.04 km away?
Answer:
XZXDHF
Explanation:ZDHF
2) If you have a saran wrap that has a neutral charge how many excess electrons does it have?
Zero, neutral means no extra electrons.
fill in the blanks (about force)
depends on _____ and _____
. Work done by a force depends upon force applied and displacement produced.
What is the weight on Earth of a girl with a mass of 32 kg (F = ma)?
Answer:
~ 314 N
Explanation:
F = ma
= 32 ( 9.81) = ~ 314 N
What is the net force on this box?
100 N
80 N
90 N
1
100 N
Answer:
10 N to the right
and the up and down is 0 N
i hope it can help
can someone help me fill in the two boxes.
Answer:
Explanation:
I believe what you're looking for is :
Opposites
Density
Could be wrong but I think so.
what is the magnitude of velocity for a 1500 kg car possessing 4500 kgm/s of momentum?
Reading the temperature of a solution by using a thermometer is an example
of a(n)
O A. hypothesis
OB. observation
O C. inference
OD. conclusion
PLEASE HELP WITH THIS!
Answer: A
Explanation:
Parallel circuit. The source current is three times the current of a single bulb
What is the net force on a 116 kg woman free falling at 97 m/s who has reached terminal velocity.
The net force acting on this object is 200N to the left. What is the force of friction and air resistance combined if the thrust force is 500N?
Answer:
Explanation:
Force of friction and air resistance acts against the external force . Let it be f .
net force = external force - frictional force and air resistance
Putting the given values
200 = 500 - f
f = 500 - 200 = 300 N .
Hence force of friction = 300 N .
A circuit with a 10 V battery and two 3 resistors in series. what is the current through the circuit.
Answer:
please use the formula to find the current/use ohms law
Explanation:
I=v/r
HELP NEEDED ASAP GIVING BRAINLIEST!!
View the video clip below and answer the question.
The video clip above illustrates the process of __________
Exploding planet or astroifd
Whats is the resistance of a bulb with a current of 60a in a circuit with a 12v battery
Answer:
60a in a circuit with a 12v battery
Explanation:
60a in a circuit with a 12v battery
Which circuit element controls the flow of current?
Answer:
REGULATOR
Explanation:
Which of the boxes on the electromagnetic spectra shown below contains all
the frequencies within the visible range?
Answer:
C.
Explanation:
C. has the box on the colors, which is the rainbow because it is the visible light we are able to see.
Answer:C
Explanation:
Example of kinetic to thermal? And explain how the energy is changing forms? Please help
Answer:
Indeed
Explanation:
Answer:
A roller coaster that is running heating up the rails
Explanation:
the enery is changing forms due to friction and cunduction
A(n) _____ represents the U.S. in a foreign country.
A. attorney general
B. ambassador
C. secretary
D. embassy
Answer:
B(Ambassador)
Explanation:
The president appoints ambassadors to foreign countries to represent the United States.
What is the mass, in grams, of 2.00 moles of H2O?
Answer:
36g
Explanation:
Given parameters:
Number of moles of H₂O = 2moles
Unknown:
Mass of H₂O = ?
Solution:
To solve this problem, use the expression below:
Mass of H₂O = number of moles x molar mass
Molar mass of H₂O = 2(1) + 16 = 18g/mol
Mass of H₂O = 2 x 18 = 36g
pllllllllllllllllllssssssssss help me will give brainiest if correct
Answer:
I believe it is the same as before-Electrical energy is transformed into heat and light energy.
Explanation:
Hope this helps'-'
Chemical energy (in his muscles) ===> kinetic energy ===> electrical energy ===> light energy and a little bit of heat energy