Answer:3000km/h
Explanation:
speed=distance/time
216,000km/72hrs
=3000km/h
Well, first of all, if there are astronauts aboard that ship, I hope they don't try to climb out yet. If they pointed straight at the moon and covered 216,000 km so far, they still have another 168,000 km to go before they get there.
Average Speed = (distance) / (time)
Speed = (216,000 km) / (72 hours)
Average Speed = 3,000 km/hr
also
Speed = (216,000 km) x (1000m/km) / (72 hr x 3600sec/hr)
Average Speed = 833.33 m/s
There's not enough information given to find the ship's velocity.
2. Find the velocity when the displacement is 40 m and the time is 5 s.
Answer:
V=?
S= 40m
t=5s
V=S/t
V=40/5
V=8m/s
What are 3 macro nutrients
Answer:
proteins carbohydrates and fats
Explanation:
Answer:
Carbohydrates, Proteins, and Fats.
What is the difference between centrifugal force and centripetal force???
Answer:
Centripetal force is the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation, while centrifugal force is the apparent force that is felt by an object moving in a curved path that acts outwardly away from the center of rotation
Explanation:
Hope this helps!
Brainliest if correct pls
A race car speeds up with an acceleration of 10 m/s2 for 21 s. If its final velocity is 210 m/s, find its initial velocity.
Answer:
answer is 0m/ sec
please follow me.
Which of the following is an example of an electromagnetic wave? (2 points)
Red light
Ocean waves
Sound waves
Earthquakes
Answer:
a
Explanation:
A 20 kg block rests on a rough horizontal table. A rope is attatched to the block and is pulled with a force of 80 N to the left. As a result, the block accelerates at 2.5 m/s^2 . The coefficient is Kinetic force friction between the block and the table is ____( Round to the nearest hundredth )
Given :
Mass of block , M = 20 kg .
Force applied , F = 80 N .
Acceleration of block , [tex]a=2.5\ m/s^2[/tex] .
To Find :
The coefficient is Kinetic force friction between the block and the table .
Solution :
We know , Force equation on block is given by :
[tex]F_{net }=F-\mu_k mg \\\\ma = F-\mu_k mg \\\\20\times 2.5 = 80 -\mu_k \times 20 \times 10\\\\\mu_k\times 200=30\\\\\mu_k=\dfrac{30}{200}\\\\\ mu_k=0.15[/tex]
Therefore , coefficient is Kinetic force friction between the block and the table is 0.15 .
Hence , this is the required solution .
a car starts from rest and drives at 45 m/s in 20 s. how far did it travel
Answer:
distance=speed×time.
45×20=900m.
Identify the term used to describe the number of protons and neutrons that are present in an atomic
nucleus.
This means divide or to take apart the pieces. ( science )
Answer:
disassemble, break apart,divide, separate
Explanation:
just know and have learned it....
The net external force on the propeller of a 3.32 kg model airplane is 23 N forward. What is the acceleration of the airplane?
Answer:
6.93 m/s^2
Explanation:
Given that the The net external force on the propeller of a 3.32 kg model airplane is 23 N forward
Where
Mass M = 3.32kg
Force F = 23 N
Force = mass × acceleration
Substitute all the parameters into the formula
23 = 3.32 × a
a = 23/3.32
a = 6.93 m/s^2
Therefore, the acceleration of the airplane is 6.93 m/s^2
In a college of exactly 2560 students, exactly 50 % are male. What is the number of female students?
2. What is the difference between distance and displacement?
Answer:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
Explanation:
:)
Answer: The complete length of the path between any two points is called distance. Displacement is the direct length between any two points when measured along the minimum path between them.
Explanation: It's what's!!
A roadrunner at rest suddenly spots a rattlesnake slithering directly away at a constant speed of 0.75 m/s. At the moment the snake is 10. Meters from the bird, the roadrunner starts chasing it with a constant acceleration of 1.0 m/s^2. How long will it take the roadrunner to catch up to the snake?
Answer:
The roadrunner will take approximately 5.285 seconds to catch up to the rattlesnake.
Explanation:
From the statement we notice that:
1) Rattlesnake moves a constant speed ([tex]v_{S} = 0.75\,\frac{m}{s}[/tex]), whereas the roadrunner accelerates uniformly from rest. ([tex]v_{o, R} = 0\,\frac{m}{s}[/tex], [tex]a = 1\,\frac{m}{s^{2}}[/tex])
2) Initial distance between the roadrunner and rattlesnake is 10 meters. ([tex]x_{o, R} = 0\,m[/tex], [tex]x_{o,S} = 10\,m[/tex])
3) The roadrunner catches up to the snake at the end. ([tex]x_{S} = x_{R}[/tex])
Now we construct kinematic expression for each animal:
Rattlesnake
[tex]x_{S} = x_{o,S}+v_{S}\cdot t[/tex]
Where:
[tex]x_{o, S}[/tex] - Initial position of the rattlesnake, measured in meters.
[tex]x_{S}[/tex] - Final position of the rattlesnake, measured in meters.
[tex]v_{S}[/tex] - Speed of the rattlesnake, measured in meters per second.
[tex]t[/tex] - Time, measured in seconds.
Roadrunner
[tex]x_{R} = x_{o,R} +v_{o,R}\cdot t +\frac{1}{2}\cdot a\cdot t^{2}[/tex]
Where:
[tex]x_{o, R}[/tex] - Initial position of the roadrunner, measured in meters.
[tex]x_{R}[/tex] - Final position of the roadrunner, measured in meters.
[tex]v_{o,R}[/tex] - Initial speed of the roadrunner, measured in meters per second.
[tex]a[/tex] - Acceleration of the roadrunner, measured in meters per square second.
[tex]t[/tex] - Time, measured in seconds.
By eliminating the final positions of both creatures, we get the resulting quadratic function:
[tex]x_{o,S}+v_{S}\cdot t = x_{o,R}+v_{o,R}\cdot t +\frac{1}{2}\cdot a \cdot t^{2}[/tex]
[tex]\frac{1}{2}\cdot a \cdot t^{2} + (v_{o,R}-v_{S})\cdot t + (x_{o,R}-x_{o,S}) = 0[/tex]
If we know that [tex]a = 1\,\frac{m}{s^{2}}[/tex], [tex]v_{o, R} = 0\,\frac{m}{s}[/tex], [tex]v_{S} = 0.75\,\frac{m}{s}[/tex], [tex]x_{o, R} = 0\,m[/tex] and [tex]x_{o,S} = 10\,m[/tex], the resulting expression is:
[tex]0.5\cdot t^{2}-0.75\cdot t -10=0[/tex]
We can find its root via Quadratic Formula:
[tex]t_{1,2} = \frac{-(-0.75)\pm \sqrt{(-0.75)^{2}-4\cdot (0.5)\cdot (-10)}}{2\cdot (0.5)}[/tex]
[tex]t_{1,2} = \frac{3}{4}\pm \frac{\sqrt{329}}{4}[/tex]
Roots are [tex]t_{1} \approx 5.285\,s[/tex] and [tex]t_{2}\approx -3.785\,s[/tex], respectively. Both are valid mathematically, but only the first one is valid physically. Hence, the roadrunner will take approximately 5.285 seconds to catch up to the rattlesnake.
True or false: We still use the republican calendar created by the French.
A charge +Q is located at the origin and a second charge, +4Q, is at distance d on the x-axis. If a third charge, q, is placed somewhere, so that all three charges will be in equilibrium.1. What should be its sign, so that all three charges will be in equilibrium?A. Negative.B. Positive.2. What should be its magnitude, so that all three charges will be in equilibrium?
Answer:
Third charge should be placed at a distance d/3
Sign is negative
Magnitude is |q| = 4Q/3
Explanation:
To find a place where a third charge, q, is placed so that all three charges will be in equilibrium would be at;
E1 = E2
Now, let the distance between the charges +Q and +4Q be d. Also, let the distance from charge +Q to the third charge q be x.
Thus;
E1 = kQ/x²
E2 = k(4Q)/(d - x)²
Since equilibrium, then;
E1 = E2 gives;
kQ/x² = k(4Q)/(d - x)²
k and Q will cancel out to give;
1/x² = 4/(d - x)²
Cross multiply to get;
(d - x)² = 4x²
Taking square root of both sides gives;
√(d - x)² = √4x²
Gives;
d - x = 2x
d = x + 2x
d = 3x
x = d/3
This is the point at which E1 = E2.
Since at equilibrium, it means that Fq + F2 = 0
Now, electric force formula is;
F = kq1*q2/r²
So; Fq = kqQ/x²
F2 = kQ(4Q)/d²
Equating Fq + F2 = 0 gives;
kqQ/x² + kQ(4Q)/d² = 0
kqQ/x² = -kQ(4Q)/d²
Like terms cancel out to get;
q/x² = -4Q/d²
q = - 4Qx²/d²
earlier we saw that x = d/3.
So, q = -4Q × (d/3)²/d²
q = -4Q × ⅓
q = - 4Q/3
Thus,it's sign is negative.
It's magnitude will be the positive value.
Thus, magnitude is;
|q| = 4Q/3
1). The sign that will be of all the given three charges being in equilibrium would be:
A). Negative
2). The magnitude to allow all the given three charges to remain in equilibrium would be:
- Magnitude [tex]|q| = 4Q/3[/tex]
Given that,
First Charge [tex]= +Q[/tex]
Second Charge[tex]= +4Q[/tex]
Third Charge [tex]= q[/tex]
The location where they will be in equilibrium would be:
[tex]E1 = E2[/tex]
So,
We will assume the distance between the first two charges i.e. +Q and +4Q as d and assume the distance from charge +Q to the third charge q as x.
Now,
[tex]E1 = kQ/x^2[/tex]
[tex]E2 = k(4Q)/(d - x)^2[/tex]
Therefore,
The equilibrium will be at:
[tex]kQ/x^2 = k(4Q)/(d - x)^2[/tex]
by solving we get,
[tex]x = d/3[/tex]
Because at equilibrium [tex]Fq + F2 = 0[/tex],
So,
F [tex]= kq1*q2/r^2[/tex]
and [tex]Fq = kqQ/x^2[/tex]
[tex]F2 = kQ(4Q)/d^2[/tex]
by resolving the equation, we get;
[tex]Fq + F2 = 0[/tex]
[tex]kqQ/x^2 + kQ(4Q)/d^2 = 0[/tex]
By solving it, we get
[tex]Magnitude(q) = - 4Q/3[/tex]
Thus, the sign is negative.
and Magnitude |q| = 4Q/3
Thus, options A and [tex]|q| = 4Q/3[/tex] would be the correct answer.
Learn more about "Charge" here:
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a current of 5 ampere is passed for 2 hours in an electric iron having a resistance of 100 ohms calculate the heat produced
Answer:
[tex] \boxed{\sf Heat \ produced \ (H) = 5 \ kWh} [/tex]
Given:
Resistance (R) = 100 Ω
Current (I) = 5 A
Time (t) = 2 hours
To Find:
Heat developed (H) in the electric iron
Explanation:
Formula:
[tex] \boxed{ \bold{ \sf H = I^2Rt}}[/tex]
Substituting values of I, R & t in the equation:
[tex] \sf \implies H = {5}^{2} \times 100 \times 2 \\ \\ \sf \implies H = 25 \times 100 \times 2 \\ \\ \sf \implies H = 5000 \\ \\ \sf \implies H = 5 \: kWh [/tex]
[tex] \therefore[/tex]
Heat developed (H) in the electric iron = 15 kWh
A long, nonconducting, solid cylinder of radius 4.0 cm has a nonuniform volume charge density r that is a function of radial distance r from the cylinder axis: r ! Ar2 . For A ! 2.5 mC/m5 , what is the magnitude of the electric field at (a) r ! 3.0 cm and (b) r ! 5.0 cm?
Answer:
a) 1.91 c/m
b) 3.62 c/m
Explanation:
See attached image
When writing a number in scientific notation, how many digits should be to
the left of the decimal point?
o
A. None
B. One
C. Two
D. It depends on how precise you want your answer to be.
Answer:
C
Explanation:
Which statement describes an advantage of models? Models can be used to communicate and test designs ideas. Models always show the exact size of a system. Models have the ability to develop into complex systems. Models are useful for developing scientific methods.
Answer:
Models are useful for developing scientific methods.
Explanation:
Which statement describes an advantage of models? And Developing is an advantage of a model.
Developing scientific methods.
What are scientific methods?
"The scientific method is a process for experimentation that is used to explore observations and answer questions."
The scientific method has five basic steps, plus one feedback step:
Make an observation.Ask a question.Form a hypothesis, or testable explanation.Make a prediction based on the hypothesis.Test the prediction.Iterate: use the results to make new hypotheses or predictions.
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How many significant figures does the value 0.080 have?
how many grams is 1dg?
Answer:
Oh, I didn't know if u meant decigram or decagram! So for decagram there would be 10 grams and deci gram is 0.1 grams. Hope this helps!!
Explanation:
Answer:
Hey there!
There are 10 grams in one decagram.
Let me know if this helps :)
1 point
In a biology experiment the number of yeast cells is determined after 24
hours of growth at different temperatures. What is the INDEPENDENT
variable? *
type of yeast
24 hour time period
different temperatures
number of yeast cells
Answer:
different temperatures
Explanation:
The independent variable would be different temperatures.
The independent variable is the variable that is manipulated or varied in an experiment in order to see the effects it will produce on another variable - the dependent variable. The values of the independent variable are directly inputted by the researcher and are not changed by any other variable throughout the experiment.
In the illustration, the effect of a variation in temperature is determined by counting the number of yeast cells. This showed that the manipulated variable is the temperature and hence, the independent variable.
What happens when sulfur reacts with potassium?
Convert 543 g to kg (Use correct number of significant figures for answer).
a
Ob
e
0.5 kg
0.54 kg
0.543 kg
5.0 kg
5.4 kg
5.43 kg
54,300 kg
543,000 kg
None are Correct
g
Answer:
0.543 kilogram
Explanation:
thats the answer
Plz help me this question is hard to under stand
Answer:
____________
in real world conditions?
it seems the most plausible.
Answer (B)
Cars are tested on closed tracks and race tracks so rule out A, D. Tha leaves us with B, C. C is kind of a real-world situation so the answer is most likely, B.
Which of the following is an example of a chemical property? Density Solubility Flammability Magnetism
Answer:
Hey there!
Flammability is a chemical property. It doesn't change based on what state of matter the object is in.
Let me know if this helps :)
Answer:Flamibilliety
Explanation:
I want to know if high school starts hard and gets easier as the year goes? in your opinion
Answer:
It depends on how much you stress I recommend starting calm!
Explanation:
Answer:
I'm a senior right now, but I think the subjects gradually get more difficult, it's not all too difficult though, it's just stressful because the amount of work your expected to finish.
Explanation:
write down formula of power
Answer:
Power is a measure of the amount of work that can be done in a given amount of time. So, the formula is the energy or work divided by time:
P = W ÷ T, where p is power , w is work and t is time.
find the potential energy of a diver of mass 75kg at a height of 10m above a swimming pool g=9.8m
Answer:
[tex] \boxed{\sf Potential \ energy \ (PE) = 7.35 \ kJ} [/tex]
Given:
Mass (m) = 75 kg
Height (h) = 10 m
Acceleration due to gravity (g) = 9.8 m/s²
To Find:
Potential Energy (PE)
Explanation:
The formula for potential energy due to gravity:
[tex] \boxed{ \bold{PE = mgh}}[/tex]
Substituting value of m, g & h in the formula:
[tex] \sf \implies PE = 75 \times 10 \times 9.8 \\ \\ \sf \implies PE = 7350 \: J \\ \\ \sf \implies PE = 7.35 \: kJ[/tex]
Plz help me I will mark brainlieat Ques. Write down name and molecular formula of a
Compound which gives hydrogen ion and sulphate on
in solution state. In which colour is the methyl Orange
changed after treating with this compound? Why?
Write name of salt when the same compound is
treated with sodium hydroxide Write down chemical
equation