Answer:
slow
Explanation
because it weighs 1,200 kg and has a velocity of 30 m/s west. with all the friction causing it to become slower.
At what point is the half-life of a radioactive isotope reached?
A. When half the parent nuclei in a sample have become daughter nuclei
B. When all the daughter nuclei in a sample have become parent nuclei
C. When half the daughter nuclei in a sample have become parent nuclei
D. When all the parent nuclei in a sample have become daughter nuclei
Answer:
A. When half the parent nuclei in a sample have become daughter nuclei
Explanation:
The point at which the half-life is reached is when half of the parent nuclei in a sample have become daughter nuclei.
Every radioactive atom starts with the parent. When they disintegrate they given the daughter nuclides.
The half - life is the time taken for half of the radioactive nuclei to disintegrate.
The shorter the half - life, the faster the decay process.
When the number of parents becomes half and it leads to the formation of the daughter, the half life point is attained.Answer:
A. When half the parent nuclei in a sample have become daughter nuclei
Explanation:
Ap3x
What is the velocity of an airplane that travels 2340 Km in 3.5 hrs?
Answer:
S=D/T
S=2340/3.5
S=668 km/hrs
Explanation:
if you move 50 meters in 10 seconds, what is your speed?
Answer:
5 meter/second.
Explanation:
50/10
PLEASE HELP ME
If a small planet were located 8.0 times as far from the sun as the Earth is, how many years would the planet take to orbit the sun?
Answer:
the time period is 22.63 years
Explanation:
The computation of the number of years taken is as follows:
According to the Keplers law
[tex]T^2 \propto R^3[/tex]
Here T denotes the time period
And, R denotes the average distance among the sun and planet
Now let us assume for earth
R_1 & T_1 be 1 year
So, for Planet
[tex]R_2 = 8R_1 , T_2 = ?[/tex]
Now applied Keplers law
[tex](\frac{T_2}{T_1})^2 \propto (\frac{R_2}{R_1})^3\\\\(T_2)^2 = (\frac{8R_1}{R_1})^3 \times 1^2\\\\(T_2)^2 = 512\\\\T_2 = 22.674[/tex]
So, the time period is 22.63 years
A rocket burns fuel as it shoots into the sky. What happens to the mass and volume of the rocket?
Answer:
mass goes down volume remains the same
What is the Coriolis effect? Explain how
this works
A projectile is launched with an initial velocity 60m/s at an angle 60° to the vertical. What the magnitude of it's displacement after 5s.
Answer:
the magnitude of the displacement after 5s is 137.31 m.
Explanation:
Given;
initial velocity of the projectile, u = 60 m/s
angle of projection, θ = 60°
time of motion, t = 5s
the vertical component of the velocity, [tex]u_y= u\ sin \theta = 60sin(60^0)[/tex]
The magnitude of the displacement after 5s is calculated as;
[tex]h = u_yt -\frac{1}{2} gt^2\\\\h = 60sin (60^0)\times 5 - \frac{1}{2} (9.8)(5)^2\\\\h = 259.81-122.5\\\\h = 137.31 \ m[/tex]
Therefore, the magnitude of the displacement after 5s is 137.31 m.
11. A fundamental property of light is that it: 15
(1 Point)
O only consists of photon particles
curves around objects
always travels the same speed
is energy
Answer:
Curves around objects
Explanation:
Diffraction is a property of light described by bending of light around an object. This ability of light to bend around edges has facilitated optical effects of light where there is interference of light waves. Other properties of light are: reflection, refraction, polarization, scattering of light, and interference of light.
1.
Which is an example of a roundworm that parasitizes humans?
a.Fluke
B.Tapeworm
C Annelid
d.Hookworm
Answer:
D Hookworm
Explanation:
2. Draw a ray diagram that shows the image
produced when an object is located at the
principal focus of a converging lens.
you have to draw diagram
Which of the following statements is not true
Answer:
The answer is the First One
Explanation:
Electromagnets can work with a magnetic source, and not just electric. sorry if my answer turns out to be wrong
what is angular velocity
Answer -:
rate of charge of angular displacement of a circular motion is called angular velocity it is denoted by omega ( ω ) . if particle trave△θ angluar displacement time then
[tex] \bold {average \: velocity \: } \: \bold{ \frac{angular \: displacement \: }{time} }[/tex]
or
[tex] \omega \frac{ \triangle \theta}{ \triangle \: t} [/tex]
if t is very small then instantaneous
[tex] \omega = \lim \: \frac{ \triangle \theta}{ \triangle \: t \: } [/tex]
Distance - 300kms
Time = 1hr 40min
Average Velocity = ?
NEED ASAP!!!!!
Answer:
3kms per minute
Explanation:
You divide the distance to the time.
Answer:
3 kilometers a minute
Explanation:
im not sure but i hope it helps
PLZ HELP FAST! Which two statements help explain why digital storage of data is so reliable?
O A. Digital data usually deteriorate over time.
I B. Digital data are easier to copy than analog data are, making them
more accessible to thieves.
O c. It is usually possible to recover data from a memory chip even
when the device containing it is broken.
D. Memory chips are sturdy.
Answer:
C and D
Explanation:
But really, You should be able to answer this with the tech knowledge of a tomato. You're given four answers, and are to choose which two are explain the reliability of digital storage.
The first two describe bad nasty things, the second two describe beneficial things.
So logically....
Answer:
C and d
Explanation:
A P E X
Calculate the potential energy of a roller coaster when mass is 53 kg and
height is 818 m.
10 points !
Answer:
P.E = 424869.2 Joules
Explanation:
Given the following data;
Mass, m = 53kg
Height, h = 818m
We know that acceleration due to gravity, g is equal to 9.8m/s²
To find the potential energy
P.E = mgh
Substituting into the equation, we have
P.E = 53*818*9.8
P.E = 424869.2 Joules
Therefore, the potential energy of the roller coaster is 424869.2 Joules.
Which term describes the quantity of energy transferred from a warmer object to a cooler object?
A. Convection
B. Heat
C. Kinetics
D. Voltage
Answer: B
Explanation:
Which of the following is the best example of Newton's second law of motion?
A. A man leans against a wall and the wall exerts a force back on the man.
B. An asteroid moves through space at constant velocity.
C. A baseball bat strikes a baseball.
D. A woman is sitting on a chair.
Answer:
C. A baseball bat strikes a baseball.
Explanation:
Newton's second law of motion states that acceleration happens when force is applied on the mass.
A baseball bat strikes a baseball is the best example of Newton's second law of motion because acceleration of the baseball is directly proportional to the force by which baseball bat hit it.
Hence, the correct option is 'C. A baseball bat strikes a baseball.'
Answer:
Baseball bla
Explanation:
yes
A crane lifts a 3,000 kg beam of concrete from the ground to a height of 50m. What work is being done on the concrete?
Answer:
The work done on the concrete is 1,470,000 J
Explanation:
Given;
mass lifted by the crane, m = 3,000 kg
height through which the mass was lifted, h = 50 m
The work done on the concrete is equal to the gravitational potential energy of the concrete due to the height it was raised.
E = W = mgh
W = mgh
W = 3000 x 9.8 x 50
W = 1,470,000 J
Therefore, the work done on the concrete is 1,470,000 J
A car travels north for 20 km. The car then travels south for 35 km.
If north is taken as the positive direction, what is the displacement of the car?
15 km
–55 km
55 km
–15 km
Answer: -15 km
Explanation:
Answer: -15
Explanation:
which statement is true of simple machines
They cannot change the direction in which you apply a force.
They cannot change the amount of work done.
They cannot change the distance over which you apply the force.
They cannot make work easier.
Answer:
a
Explanation:
i took the test
Answer:
It is 100% B
Explanation:
I just took the test and it was right I promise
5x - 1 1 - 2x
3
5
11.152
<8+2
Answer:
x≥0
Explanation:
Let's find the critical points of the inequality.
−2x3511.152+5x−11=10
−2x3511.152+5x−11+−5x=10+−5x(Add -5x to both sides)
−2x3511.152−11=−5x+10
−2x3511.152−11+11=−5x+10+11(Add 11 to both sides)
−2x3511.152=−5x+21
−2x3511.152
−2=−5x+21/−2
(Divide both sides by -2)
x3511.152=5/2x+−21/2
How do the cities in the northern hemisphere compare to those in the southern hemisphere?
IikiiiijjjjjHunnish uh uh Veg f to tcHelp me I have inserted a picture of the question
Answer:
I think this is correct
Explanation:
frequency definition is the number of complete waves produced per second so if you have 100Hz, it is 100 complete waves produced in 1 seconds, and when it says vibrates 300 times in 3 seconds, you find for 1 second
vibrations is most probably the frequency in one second
1 second -----100 vibrations
thus the frequency = 100 Hz
hope this helps!!!!!!
Three students are about to dive from the high boards into the pool. The boys are on diving boards that are 3 m above the water, and the girl is on a board that is 5 m above the water. Using the picture as a model of energy levels, which of these has the MOST gravitational potential energy AND explain HOW YOU KNOW. (hint: think about what is true about things with a large potential energy…)
Answer:
Explanation:
Given that there are boys (plural) only at a height of 3 meters, they still might have more energy than a single girl.
The girl might have a mass of 50 to 60 kg. The boys will likely have slightly more.
Girl PE
PE = 5 * 50 * 10
PE = 2500 N
Boys
PE = 3 * 120 * 10
PE = 3600 N
That's with 2 boys on the 3 meter board. The girl would have a PE more than 1 boy likely or possibly.
SOMEONE PLEASE HELP PLEASE PLEASE
Imagine you are sitting on a surfboard in the ocean, waiting to catch a big wave. When the
ocean is still, you are sitting at a point that would be the midpoint (the undisturbed position) of
any waves that come your way. You look out to see and see a set of waves coming your way.
What you see is actually a pattern of troughs followed by crests of the waves moving toward you
and the shore. The distance between the crests is 5 meters. A crest passes you every 20
seconds.
Answer these questions - Show all work to receive credit:
A. What is the wavelength?
B. What is the frequency?
C. What is the wave velocity?
І
A satellite is orbiting the Earth. If the satellite was placed in an orbit at twice the original distance,
what would happen to the force of gravity? By how much would the gravitational force increase or
decrease?
A publication which contains news on current events
Answer:
A newspaper is a serial publication which contains news on current events of special or general interest.
Answer/Explanation:
Newspapers are generally published daily, weekly, and bi-weekly, although they may have less regular publication schedules. A regularly published collection of fairly brief articles that provide updates on current events and interests.
Please select the word from the list that best fits the definition
Choose the correct process for the description given:
oxygen is given off as a by-product
1) Cellular Respiration
2) Photosynthesis
Answer:
cellular respiration , note how it says oxygen
rest and motion are relative terms why?
Answer:
Rest and motion are the relative terms because they depend on the observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body.
What is the Gravitational Potential Energy of a 30kg block resting 5m above the ground?
O 150 )
O 1500
O 6)
O 60)
Answer:
1500J
Explanation:
Given parameters:
Mass of the block = 30kg
Height = 5m
Unknown:
Gravitational potential energy = ?
Solution:
The Gravitational potential energy of body is due to its position above the ground level.
Gravitational potential energy = mass x acceleration due to gravity x height
So;
Gravitational potential energy = 30 x 9.8 x 5 = 1470J or 1500J
