Answer:
A
Explanation:
insects undergo Pupal life cycle
Indium-117 has a half-life of 43 minutes. If you start with 500 grams of indium-117, how much time will it take to have 31.25 grams of indium-117 left in the sample?
Answer:
500 / 31.25 = 16
(1/2)^n = 1/16 where n is the number of elapsed half-lives
(1/2)^4 = 1/16 so the sample has gone thru 4 half-lives
43 min * 4 = 172 min = 2.87 hrs
How much work do I put in if I pushed an object with a force of 64 a distance of 11m
Answer:
Work = Force * Distance
Here,
force = 64 Ndistance = 11mThus, Work = 64 * 11 = 704 joules(J)
The "brightness" or tallness of an electromagnetic wave is its:
A) Amplitude
B) Wavelength
C) Frequency
Answer: Amplitude
Explanation: The amplitude of light waves is associated with our experience of brightness or intensity of color, with larger amplitudes appearing brighter.
1. How long would the car in Sample Problem C take to come to a stop from its initial velocity of 20.0 m/s to the west? How far would the car move before stopping? Assume a constant acceleration. Aron1
The time taken, and the distance travelled by the car before stop, will be 5.3 second and -53.3 m west.
What is the distance?The length of the path traveled by the body is known as the distance covered by the body.
Distance is a 1-dimensional phenomenon. its unit is a meter(m). The distance can be found by the product of velocity and time.
The given data in the problem will be
u is the initial velocity =20m/sec
t is the time =?
d is the distance =?
From the Newtons second law;
[tex]\rm F \triangle t = \triangle P \\\\ \triangle t = \frac{\triangle P }{F} \\\\ \triangle t = \frac{m(v_f-v_i)}{F} \\\\ \ \triangle t = \frac{2240 (0-20))}{8410} \\\\ \triangle t = 5.3 \ sec \\\[/tex]
The distance travelled before the car stop is,
[tex]\rm \triangle t = \frac{1}{2} (v_f+v_i)\traingle t \\\\ \traingle x = \frac{1}{2} (-20+0)5.3 \\\\\ \triangle x= -53.3 m \ west[/tex]
Hence,the time taken, and the distance travelled by the car before stop, will be 5.3 second and -53.3 m west.
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You position two plane mirriors at right angles to each other a light ray strikes one mirrior at an angle of 60 to the normal and reflects towards the second mirrior what is the angle of reflection off the second mirrior
Answer:
30 degrees
Explanation:
Reflects off of mirror 1 at 60 degrees....this makes it incident to second mirror at 30 degrees ....then angle of reflection equals this angle of incidence = 30 degrees
See atached diagram
why do water use acidified
Answer:
To create healthy water and more for more H (hydrogen)
Explanation:
Electrical energy is sold by the kilowatt hour How much would it cost to heat a hot tub from 15 to 43
Answer:
hot tub is hot
Explanation:
dont get fried
An ecosystem with one dominant type of plant growing in it is a healthy, stable ecosystem. True or false?
In a parallel circuit with 4 lights,
why will the other lights work
even if one of the bulbs goes out?
A. Because each light has its own complete path
for the electrons to flow
B. Because there is only one path for the
electrons to flow, and it goes through all four
lights
C. Because if one light goes out, it stops the flow
of electrons
Answer:
A
Explanation:
A parallel circuit has its own path for each light, so even when one bulb goes out, the electrons keep moving through the other paths and light up the other bulbs. Therefore, the answer is A.
Two capacitors C1 = 1.5 μF and C2 = 5 μF are in series. If the charge stored by C1 is 10 C, determine the charge stored by C2. a. 4 C b. 1.5 C c. 10 C d. 3 C
Answer: I buleve it’s B 1.5C
Explanation: I took the quiz
Hope this helps and have a nice day!
The figure above shows a rod that is fixed to a horizontal surface at pivot P The rod is initially rotating
without friction in the counterclockwise direction. At time t, three forces of equal magnitude are applied
to the rod as shown. Which of the following is true about the angular speed and direction of rotation of
the rod immediately after time t?
The angular speed is decreasing and direction of rotation clockwise of the rod immediately after time t.
What is angular speed ?The rate of change of angular displacement is defined as angular speed. It is stated as follows:
ω = θ t
Where,
θ is the angle of rotation,
t is the time
ω is the angular velocity
The torque is found as;l
[tex]\rm T = F \times r[/tex]
If the force is acting on the rod from the three point is the same, the value of the torque is depends upon the radius or the perpendicular distance.
The perpendicular distance of the right force is grater. Hence, the force acting on the right side is more, and the rod will rotate clockwise.
Both the forces are acting downwards. Thus, the resultant force is the less due to which the speed is increasing.
Hence, the angular speed is decreasing and direction of rotation clockwise of the rod immediately after time t.
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Can someone answer and explain these questions?
Answer:
oh that looks hard but sorry im not good at math ether so sorry i couldnt help
Explanation:
A 4 loop standing wave on a string that is 2 meters long oscialltes at a frequency of 6.7 Hz. What woud be the frequency of the string if it had an 8 loop standing wave pattern?
The frequency of the string if it had an 8 loop standing wave pattern is determined as 13.4 Hz.
Relationship between number of loops and harmonics
The relationship between number of loops and harmonics of the standing wave is given as follows;
1 loop = first harmonic = f₁2 loops = second harmonic = f₂ = 2f₁3 loops = third harmonic = f₃ = 3f₁4 loops = fourth harmonic = f₄ = 4f₁8 loops = eight harmonic = f₈ = 8f₁Frequency of the string if it had an 8 loops standing wave pattern
f₄ = 4f₁
f₁ = f₄/4
f₈ = 8f₁
f₈ = 8(f₄/4)
f₈ = 2f₄
f₈ = 2 x 6.7 Hz
f₈ = 13.4 Hz
Thus, the frequency of the string if it had an 8 loop standing wave pattern is determined as 13.4 Hz.
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What happens to the atomic number of an atom when the number of neutrons in the nucleus of that atom increases? a It decreases b It increases c It doubles d It remains the same
Answer:
It remains the same
Explanation:
It remains the same. This is because the number of protons doesn't change and the number of protons determines the atomic number.
What exercises can help reduce stress?
A 6.1 car is traveling at 17 m/s. What is its momentum?
Answer:
103.7
Explanation:
The equation to find momentum is p=mv
P- momentum
M- Mass
V- velocity
Then just plug in 6.1 for mass and 17m/s for velocity. Multiply!
Take 50 points please help me look the picture
Answer:
4 : 1
Explanation:
Pulse rateAlso referred as heart rate can be affected due to vigorous exercise, age, health. Normally the pulse rate of an adult is between 60 to 100 beats per minute. pulse rate: 80 bpm.
Breathing rateThe amount of oxygen taken in inside of our body from the air. Breathing rate is usually affected due to age. Normal breathing rate of an adult is between 15 to 24 breaths per minute. breathing rate: 20 bpm.
Ratio of breathing to pulse ratepulse rate : breathing rate
80 : 20
4 : 1
What is the voltage of a circuit with power 12 W and current 2
A?
Answer:
6 v
Explanation:
power = watts
watt = voltage * current
12 = v * 2
v = 6 v
Which of the following statements regarding the moon and Earth is correct?
A. Earth and the moon are nearly the same age.
B. Earth and the moon have nearly the same mass.
C. Earth is tidally locked, while the moon spins on its axis.
D. The moon is older than Earth by approximately 300 million years.
i think it is A?
1.2Amp
40 ohm
20 ohm
calculate the current flowing through each resistor
Hi there!
We can begin by finding the equivalent resistance of the parallel segment shown in the diagram.
Recall the following for resistors in parallel:
[tex]\frac{1}{R_e} = \frac{1}{R_1} + \frac{1}{R_2} + ... + \frac{1}{R_n}[/tex]
Plug in the given values for the resistances and solve.
[tex]\frac{1}{R_e} = \frac{1}{40} + \frac{1}{20}\\\\\frac{1}{R_e} = 0.075\\\\R_e = \frac{1}{0.075} = 13.333 \Omega[/tex]
Now, to solve for the total voltage that will go through this segment, we can use Ohm's Law:
[tex]V = iR\\\\V = 1.2 (13.333) = 16 V[/tex]
This is a parallel branch, so 16V goes through each resistor. We can now rearrange Ohm's law equation to solve for current for each resistor.
[tex]i = \frac{V}{R}\\\\i_{40} = \frac{16}{40} =\boxed{ 0.4 A}\\\\i_{20} = \frac{16}{20} = \boxed{0.8 A}[/tex]
**Notice that the two currents ADD UP in parallel to the total. Also, this problem can be done more simply using ratios, but this method will help you solve series and parallel combination circuits.
You and your friend each drive 100.0 km. You travel at 30.0 km/h. Your friend travels at 45 km/h. How long will your friend be waiting for you at the end of the trip?.
Answer:
See below
Explanation:
100 km / 45 km/hr = 2.222 hr
100 km / 30 km/hr =3.3333 hr
Difference = 1.111 hr = 1 hr 6 2/3 min
form a hypothesis to explain the shape of this graph
Answer:
Where's the graph?
Explanation:
Using the graph above determine the acceleration for the object represented between 6.0s and 8.0s
The object was moving at constant velocity between the points on the graph that we marked 6 s to 8s.
What is acceleration?
The term acceleration has to do with the change of velocity with time. In this case, we saw that the velocity of the car was not changed between 6 s to 8s.
Now , the object was moving at constant velocity between the points on the graph that we marked 6 s to 8s.
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Use the Figure 1 and decide which swithes should be turned "on" position in order to get the circuit given in Figure 2.
Answer:
see below
Explanation:
closing 1 and 2 will get the A part
close 6 and 3 to get the parallel B part
leave all of the other switches open
When an object has more negative charge than positive charge, the object is called
When an object has more negative charge than a positive charge, the object is called a negatively charged object or anion.
What is a negatively charged object?A negatively charged object has more electrons than protons. This is because electrons are negatively charged subatomic particles in an atom. A neutral object has the same number of protons as electrons. Electrons or negative charges can flow freely from object to object.
When an object has a positive charge, it has more protons than electrons. Therefore, when an object has a negative charge, then that object contains more electrons than protons. Electrical effects are caused by the charge imbalance between a negatively charged object and a positively charged object.
Therefore, when an object has more negative charge than a positive charge, the object is called a negatively charged object or anion.
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when an object is thrown, the thrower pushes the object. that causes the object to move in a what motion?
Answer:
When an object is thrown, the thrower pushes the object. This causes the object to move in a
Explanation:
When there is no torque acting
on a
body, its angular momentum is constant.
True or false
Answer:
the correct answer is true.
Explanation:
hope the above photo is self explanatory.please not forget to rate and mark brainliest!!!Answer: True
Explanation:
An elevator lifts a total mass of 1.1×103 kg a distance of 40.0 m in 12.5 s. How much power does the elevator deliver?
The power delivered by the elevator is 34496 W.
What is power?Power is the rate at which energy is used up.
To calculate the power delivered by the elevator, we use the formula below.
Formula:
P = mgh/t.............. Equation 1Where:
P = Power delivered by the elevatorm = Total mass on the elevatorg = acceleration due to gravity h = HeightFrom the question,
Given:
m = 1.1×10³ kgh = 40 mt = 12.5 sg = 9.8 m/s²Substitute these values into equation 1
P = 1.1×10³×40×9.8/12.5P = 34496 W.Hence, the power delivered by the elevator is 34496 W.
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What is the time in seconds?
Answer:
5/9 Hz
Explanation:
Period = 1.8 seconds to go through a full cycle
freq = 1/period = 1/ (1.8) = 5/9 Hz
You have a meteorite sample and you decide to use the uranium-235/lead-207 system to date it. After analysis, you find that it has 22,500 atoms of 235U remaining, and 1,477,500 atoms of 207Pb that the 235U decayed to. What percentage of the original amount of 235U is still present?
Originally there must been
1,4775E6 + 2.25E4 = 147.75E4 + 2.25E4 = 150E4 present at start
% = 2.25 / 150 = 1.5 % of 235 U left