Treating the box as a particle, there are two forces acting on it in opposite directions: the box's weight mg pulling it downward and the resistive force of the air pointing upward.
The box is falling at a constant speed, so by Newton's second law we have
mg - r = 0
where mg = (75.0 kg) (9.80 m/s²) = 735 N is the weight of the box and r is the magnitude of air resistance. So we have
r = mg = 735 N
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Answer:
I don’t know what that is I’m sorry
Explanation:
Answer:
tbh i wish i can help
Explanation:
we cannot work without food why
Answer:
Food supplies the body with energy and without energy the body cannot work.
Which diagram best represents the electric field around a negatively charged conducting sphere? (See pic)
The diagram which represents the electric field around a negatively charged conducting sphere is: Image D.
What is an electric charge?An electric charge can be defined as a fundamental, physical property of matter, that typically governs how particles are affected by an electric field or electromagnetic field, especially due to the presence of an electrostatic force.
The electric field around a negatively charged conducting sphere are all attracted to the sphere in accordance with the law of electrostatic forces, as depicted by Image D in the given diagram.
Read more on charge here: brainly.com/question/4313738
Which particles
are
electrically neutral?
А
electrons
B
protons
C
neutrons
D
all of the above
For flocabulary
Answer:
C. Neutrons
Explanation:
Protons +
Electron -
the equation of a progressive
by y=0.02 sin2π/0.5 (320t - x) where x and y are in
meters and t is in second
find the
il amplitude
i frequency
wavelengths
velocity of the Progress in
waveم ا )
Answer:
Amplitude = 0.02m
Frequency = 640 Hz
Wavelength, λ = 0.5m
v = 320 m/s
Explanation:
Given the wave equation :
y=0.02 sin2π/0.5 (320t - x) where x and y are in
meters and t is in second
Comparing the above relation with the general wave equation :
y(x, t) = Asin2π/λ(wt - kx)
The amplitude, A = 0.02
From the equation :
2π/0.5 = 2π/λ
λ = 0.5 m
320t = vt
Hence, v = 320 m/s
Recall :
v = fλ
320 = f * 0.5
f = 320 / 0.5
f = 640 Hz
. Name two ways to decrease the electric force between two charged object
Answer:
breaking the circuit
Explanation:
how are dams made do they just freeze time?
Answer:
Gravity dams are so named because they are held to the ground by gravity – they weigh a lot, and are typically made from concrete or stone. Engineers must de-water the river where the dam is meant to be built. This is done by diverting the river through a tunnel that runs around the intended construction zone.
Answer:First, they dug tunnels from below the dam to above the dam. Then, they put the cofferdam in place, and opened the tunnels. The water flowed around the site where the permanent dam would be built until they were done, at which point the cofferdam was removed.
Explanation:hope this helped
A ball from to a planet that has a gravitational acceleration that double that of Earth How does the gravitational force on the new planel c gravitational force on the ball when on Earth?
Answer:
Explanation:
The gravitational force on the ball when it is on the new planet is double the force on the ball when it is on Earth. The gravitational force on the ball when it is on the new planet is half the force on the ball when it is on Earth.
What force is necessary to accelerate a 5.0 kg mass from rest to a final velocity of 10.0 m/s in 5.0 s?
Answer:
So the answer is Fnet=50N
Explanation:
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly six months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have advanced exactly 90 years into the future. According to special relativity, how fast must you travel
Answer:
v = 0.99 c = 2.99 x 10⁸ m/s
Explanation:
From the special theory of relativity:
[tex]t = \frac{t_o}{\sqrt{1-\frac{v^2}{c^2} } }\\[/tex]
where,
v = speed of travel = ?
c = speed of light = 3 x 10⁸ m/s
t = time measured on earth = 90 years
t₀ = time measured in moving frame = 6 months = 0.5 year
Therefore,
[tex]90\ yr = \frac{0.5\ yr}{\sqrt{1-\frac{v^2}{c^2} } } \\\\\\\sqrt{1-\frac{v^2}{c^2}} = \frac{0.5\ yr}{90\ yr}\\ 1-\frac{v^2}{c^2} = 0.00003086\\\frac{v^2}{c^2} = 1-0.00003086\\[/tex]
v = 0.99 c = 2.99 x 10⁸ m/s
3. When a magnetic sector instrument was operated with an accelerating voltage of 4.50*103 V, a field of 0.251 T was required to focus the CH4 on the detector. a) What range of field strengths would be required to scan the mass range between 12.5 and 2.50*102 , for singly charged ion, if the accelerating voltage is held constant
Answer:
The answer is "[tex]4,500 - 225 \ V[/tex]".
Explanation:
Using formula for calculating the Voltage:
[tex]M_1=12.5\\\\M_2=250\\\\V_1=4,500 \\\\\bold{\text{Formula: }}\\\\\to \bold{\frac{m_1}{m_2}=\frac{V_2}{V_1}}\\\\\to \frac{12.5}{250}=\frac{V_2}{4,500}\\\\\to 0.05=\frac{v_2}{4,500}\\\\\to 0.05\times 4,500= V_2\\\\\to V_2=225\\\\[/tex]
Hence the range of accelerating in voltage is [tex]4,500 - 225 \ V[/tex]
Sarah is a 30 year old white female. Her occupation is part time chef. She is recently been divorced and has custody of
her three children. She has extreme changes in her mood that began to appear in her 20's but she never went to
see a
doctor about them. When family tries to talk to her about her upset, she reacts by becoming angry and blaming them
for her situation. She is currently complaining of crying episodes, not eating, headaches, thinking she is a failure,
spending most of her time in bed, and not being interested in activities she once enjoyed doing with her kids, such as
going to the park and seeing movies. Her mother and grandfather also showed signs of mental illness and she
reported that her mom has taken Depakote before, which helped. Sarah wants to open her own restaurant and move to
a bigger house.
1. Please answer the following questions by referring to the above case study and the assigned reading for this
unit:
• What psychological and physical symptoms does Sarah present with?
. What is the primary psychological disorder diagnosis that fits her symptoms based on the disorders
described in the textbook?
Answer:
how to deal with devoirce
Explanation:
The psychological and physical symptoms that Sarah presents include:
She frequently has headaches.She also has a loss of appetite.She gets angry easily.From the information given, we can infer that some of the symptoms include the fact that Sarah frequently has headaches, loss of appetite, and gets angry easily.
The primary psychological disorder diagnosis that fits her symptoms based on the disorders will be depression. She's depressed because she just got divorced. This has taken a toll on her health.
Read related link on:
https://brainly.com/question/19276767
∁=f
E=hf
c=3x108m/s h=6.63x10-34 J*s
The spectrum of Hydrogen is in the picture below.
ShapeWrite their wavelength (m), frequency (Hz), speed (m/s), and energy (J).
ShapeShapeShape
wavelength
frequency
speed
energy
404x10-9m
4.04x10-7m
7.42x1014 Hz
3x108 m/s
4.92x10-19J
447 nm à ______________ m à f=_______________________ à E= __________________
471 nm à ______________ m à f=_______________________ à E= __________________
501 nm à ______________ m à f=_______________________ à E= __________________
587 mm à ______________ m à f=_______________________ à E= __________________
667 mm à ______________ m à f=_______________________ à E= __________________
2.56 m à ______________ m à f=_______________________ à E= __________________
Answer:
so you have a question
Explanation:
either way have a nice day
A flywheel having constant angular acceleration requires 4.00 ss to rotate through 164 radrad . Its angular velocity at the end of this time is 106 rad/srad/s . Find the angular velocity at the beginning of the 4.00 ss interval; the angular acceleration of the flywheel. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Rotation of a bicycle wheel.
Answer:
[tex]\omega '=-13.5rad/s[/tex]
Explanation:
From the question we are told that:
Time [tex]t=4sec[/tex]
Angular displacement [tex]\theta= 161 rad[/tex]
Final Angular velocity [tex]\omega = 100 rad / s[/tex]
Let
Angular acceleration [tex]\alpha[/tex]
Generally the equation for Initial Angular velocity [tex]\omega '[/tex] is mathematically given by
[tex]-\omega '^2=2 \alpha \theta -\omega^2[/tex]
[tex]\omega '^2= \alpha 328 +11236[/tex]
Also,Initial Angular velocity [tex]\omega '[/tex] is mathematically given by
[tex]\omega '=\omega - \alpha t[/tex]
Therefore substitution
[tex]-\omega '^2=2 \alpha \theta -\omega^2[/tex]
[tex]\omega '=\omega - \alpha t[/tex]
[tex](\omega - \alpha t)^2=2 \alpha \theta -\omega[/tex]
[tex]-16\alpha^2+848\alpha+11236= \alpha 328 -11236[/tex]
[tex]16\alpha^2-520\alpha=0[/tex]
[tex]\alpha=29.875rads/s^2[/tex]
Substitution in the 2nd equation for Initial Angular velocity [tex]\omega '[/tex]
[tex]\omega '=106-(29.875rads/s^2*4)[/tex]
[tex]\omega '=-13.5rad/s[/tex]
in the early solar system,comets that struck earth may have brought in
A.water
B.advanced life
c.plankton
D.all of the above
[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]
In the early solar system,comets that struck earth may have brought in
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {A.water}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {B.Advanced Life}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {C.Plankton}}}[/tex]
[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {D. All \: of \: the \: above}}}[/tex]
[tex]\huge{\mathbb{\tt { ANSWER↓}}}[/tex]
[tex]\color{red}{\tt {D. \: All \: of \: the \: above}}[/tex]
[tex]\color{black}{\tt {because \: the \: true \: answer \: is \: comet}}[/tex]
[tex]{\boxed{\boxed{\tt{WHAT \: IS \: COMET?}}}}[/tex]
[tex]\color{black}{\tt{A \: comet \: is \: an \: icy, \: small \: Solar \: System \: body}}[/tex]
[tex]\color{black}{\tt { that, \: when \: passing \: clos \: e to}}[/tex]
[tex] \color{black}{\tt {the \: Sun, \: warms \: and \: begins \: to \: release}}[/tex]
[tex]\color{black}{\tt { gases, \: a \: process \: that \: is \: called \: outgassing. }}[/tex]
[tex]\color{black}{\tt{This \: produces \: a \: visible \: atmosphere \: or \: coma,}}[/tex]
[tex]\color{black}{\tt{and \: sometimes \: also \: a \: tail}}[/tex]
#CarryOnLearning
#LetsEnjoyTheSummer
→XxKim02xXDo you think the "energy" used by people and the energy used by cars is the same thing? Why or why not? *
Answer:No
Explanation:Because car use the energy produced by the car battery and humans get energy from the food they eat
A wave with a period of .0005 s/cycle has what frequency? Please help me my teacher didn’t explain good .
Answer: frequency f = 2000 1/s (Hz)
Explanation: period T means time for one cycle and frequency f tells how many cycles there are in seconds. Unit of frequency is 1/s= Hz. Period T = 1/f and frequency f= 1/T.
E.g is T= 0.01 s then f= 1/ (0.01 s) = 100 Hz. And I'd frequency is 20 Hz,
T= 1/(20 Hz)= 0.05 s. So, if T = 0.005 s, f= 1/T
HELP QUICK! Please can anyone do the other half for me
Answer:
9) c
10) c
11) d
12) d
Explanation:
I think it's helps you
PLEASE HELP ASAP-SCIENCE EXAM-WILL GIVE BRAINLIEST-NO FILES
Speed can be defined as
A. the rate that something moves and is calculated by taking distance divided by time
B. the distance an object went from one place to another
C. the amount of time an object spends in motion
Answer:
A. the rate that something moves and is calculated by taking distance divided by time
a) State what is meant by absolute zero temperature.
Answer:
Absolute zero temperature is the lowest limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero kelvins.
How has the theory of the Universe changed over time?
What current is flowing through the circuit pictured below and what is the current through 50 resistor in the circuit pictured below?
Answer:
0.09 is the current flowing through the circuit
Should there be a salary cap for professional athletes?
answer:
From the fan side: Salary caps mean better competition and more parity between all teams in a given league (in theory, anyway). Salary caps in the NFL, NBA and NHL can foster this, but in MLB, luxury tax requirements may not be enough to prevent large-market teams from dominating.
plz mark me as brainliest plzzzz
How is the gravity between two objects affected by their masses?
Answer:
Objects with greater mass have a stronger force of gravity between them. Objects that are closer together have a stronger force of gravity between them.
Explanation:
Newton's law states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.
What is the Underground water
Answer:
water found underground is called undergroundwater
What question were you trying to answer in this study?
A. Why are the lightbulbs exploding?
B. Why are the lightbulbs melting?
C. Why are the lightbulbs so dim?
D. Why are the lightbulbs burning out?
How much far is the Moon from Earth if it takes light 8.53 hours to travel there?
Answer:
9.21x10¹² m
Explanation:
In order to solve this problem we need to move the speed at which light moves. That value can be readily found on textbooks:
c = 3x10⁸ m/sThen we can use the formula for speed:
Speed = distance / timeDistance = Speed * timeWhere in this case Speed is c, and the time is 8.53 hours.
Now we convert 8.53 hours into seconds:
8.53 hr * [tex]\frac{60min}{1hr}*\frac{60s}{1min}[/tex] = 30708 sFinally we calculate the distance:
3x10⁸ m/s * 30708 s = 9.21x10¹² mPls help will give brainlist
A sample of aluminum has a mass of 4.86 grams and a volume of 1.8 cubic centimeters. What is the density of aluminum rounded to the nearest tenth? 2.7 g/cm³
Answer:
3g/cm³
Explanation:
2.7
The seven adds 1 to the 2 making it 3.0
Answer:
its A
Explanation:
A bird sits on a uniform rod suspended from vertical wires P and Q.
i
x !
'
v
P a
1
not to scale
15.0 cm
2W
The rod has a weight J’ and is 15.0 & long.
The weight of the bird is 2’ and acts at a distance x from P.
What is the value of x when the tension in P is half the tension in Q?
[1 mark]
A 7.50 cm [=]
B 10.0cm [e]
Cc 13cm fe]
D 15.0cm [e]
!