Explanation:
where are the statements
A car traveling at 65 mph is an example of its
Answer:
Speed
Explanation:
The distance traveled by an object in a unit of time is speed
Which of the following is the best
definition of tissue?
1 Pt
A
B
A. what organs are made of
B. your skin and muscles
C. parts of cells
D. a group of similar cells working together
E. None of the above
Decribe what must happen inside of an aluminum can in order for it to be attracted to a positively-charged and to a negatively-charged object
Answer:
The PROTONS in the can attract to the negatively charged object, so then the can becomes polarized and the ELECTRONS in the can attract the positively charged object.
Explanation:
The PROTONS inside the can entice to the negatively charged object, so then the can will become polarized and the ELECTRONS in the can appeal to the undoubtedly charged item.
How are proton and electron associated?The number of protons within the nucleus of the atom is identical to the atomic range. The variety of electrons in an impartial atom is identical to the number of protons. The mass range of the atom (M) is equal to the sum of the wide variety of protons and neutrons inside the nucleus.
Protons definitely charged subatomic particles that live in the nucleus. Neutrons: Neutrally charged subatomic particles that are living in the nucleus. Electrons: Negatively charged subatomic debris found inside the electron shells surrounding the nucleus.
An electron is a negatively charged factor of an atom while the proton is an undoubtedly charged frame. The electrons are present out of doors the nucleus inside the orbiting shells. But the protons alongside neutrons shape the nucleus of the atom and are gifted in the middle of the atomic nuclei.
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A hot-air balloon with a mass of 400 kilograms moves across the sky with 3,200 joules of kinetic energy. The velocity of the balloon is meters/second.
Answer:
4 m/s
Explanation:
KE =
Velocity of balloon will be 4 m/s.
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Dani says, "This classroom is 11 meters long. A meter is longer than a yard, so if I measure the length of this classroom in yards, I will get less than 11 yards."
Do you agree with Dani ?
Answer:
im not sure i just need points....
Explanation:
A sound wave is produced by a musical instrument for 0.40 second. If the frequency of the wave is 370 hertz, how many complete waves are produced in that time period? *
A) 200 waves
B)150 waves
C)100 waves
D) 50 waves
Explanation is in a file
bit.[tex]^{}[/tex]ly/3a8Nt8n
The number of waves produced by the musical instrument during the given time is 148 waves.
What is meant by frequency of a wave ?Frequency of a wave is defined as the number of oscillations completed by the wave in one second.
Here,
The frequency of the wave, f = 370 Hz
That means the wave completes 370 oscillations in 1 second. Or 370 waves are produced by the musical instrument in 1 second.
The time taken by the instrument to produce waves, t = 0.4 s
Therefore,
The number of waves produced by the musical instrument during this time is,
n = f x t
n = 370 x 0.4
n = 148
Hence,
The number of waves produced by the musical instrument during the given time is 148 waves.
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does motion of charge always lead to electric current ?
Answer:
The charges in motion constitute an electric current. However, not all moving charges constitute an electric current.
a
400 12
M
b
290 12
с
The question below refers to the circuit shown in the image
--
12.0 y
If the voltage across the 400 resistor is 7 V, what is the voltage across the 290 Q resistor?
O 5V
O 7V
O 9V
O 12 V
1
2
3
4
5
Answer:
i would think c
Explanation:
A 5kg book is slid across the floor with an initial velocity of 3m/s. It slows and stops due to the friction with the floor. How man joules of work did friction do?
Answer:
SUP DAD i love cookies
Explanation:
yuh
If the vehiche has a speed of 24.0 m/s at point a what is the force of the track on the vehicle at this point?
Question:
A roller-coaster vehicle has a mass of 500 kg when fully loaded with passengers. If the vehicle has a speed of 20.0 m/s at point A, what is the force exerted by the track on the vehicle at this point?
See attachment
Answer:
33700 Newton
Explanation:
Given
[tex]m = 500kg\\v = 24.0m/s\\r=10m[/tex]
First, we determine the forces acting on mass m.
They are: the force exerted by the track (Fn) and the weight of the vehicle (W)
So, the net force is:
[tex]F_{net} = F_n - W[/tex]
[tex]W=mg[/tex]
So:
[tex]F_{net} = F_n - mg[/tex]
Make Fn the subject
[tex]F_n = F_{net} + mg[/tex]
Fnet is calculated as:
[tex]F_{net} = F_c = \frac{mv^2}{r}[/tex] --- i.e. the centripetal force
So:
[tex]F_n = F_{net} + mg[/tex]
[tex]F_n = \frac{mv^2}{r} + mg[/tex]
[tex]F_n = \frac{500 * 24^2}{10} + 500 * 9.8[/tex]
[tex]F_n = 28800 + 4900[/tex]
[tex]F_n = 33700N[/tex]
Determine whether a moving tennis ball and a racket held by the player have the same momentum or different momentum. If different, determine which object has more momentum.
Answer:
key points:1.momentum and impulse
2.condition for conservation of momentum and why
3.how to solve collision problems
4.centre of mass
Explanation:
momentum is a vector
force of a tennis ball
for a top player,a tennis ball may leave the racket on the with a speed of 55m/s(about 120mi/h).if the ball has a mass of 0.060kg and is in contact with the racket for about 4ms(4×10)s.estimate the average force on the ball
I NEED THIS RIGHT NOW, PLEASE HELP!!!
The energy of a photon was found to be 3.38 x 10-19 J. Planck's constant is 6.63 x 10-34 J. S. Which color of light corresponds to this photon?
violet
green
yellow
red
Answer:
The correct option is (c).
Explanation:
Given that,
The energy of a photon is, [tex]E=3.38\times 10^{-19}\ J[/tex]
We need to tell the color of this light. We know that, the energy of a photon is given by :
[tex]E=\dfrac{hc}{\lambda}[/tex]
Where
c is the speed of light
[tex]\lambda=\dfrac{hc}{E}\\\\\lambda=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{3.38 \times 10^{-19}}\\\\\lambda=5.88\times 10^{-7}\ m\\\\\lambda=588\ nm[/tex]
The wavelength of yellow light is approx 580 nm. Hence, we can say that this photon corresponds to yellow light.
Answer:
B. Green
Explanation:
correct on EDGE2021
When light hits a second transparent medium, light-
A. Reflects and Refracts
B. Refracts only
C. Reflects only
Answer:
C. Reflects only
Describe the forces that are acting on a person who is standing still on a sidewalk, and identify whether the forces are balanced or unbalanced. Describe how the forces would change if the person started walking.
Answer:
a. i His weight and the normal force on him due to the ground
ii The weight and the normal force are balance
b. There are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.
Explanation:
a. i Describe the forces that are acting on a person who is standing still on a sidewalk
His weight and the normal force on him due to the ground act on him while the person is standing on the sidewalk
ii. identify whether the forces are balanced or unbalanced.
The weight and the normal force are balance because, the person does not move in the vertical or horizontal direction.
b. Describe how the forces would change if the person started walking.
When the person starts walking, the backward push due to his leg on the ground and the frictional force between his feet and the ground now acts on him in the horizontal direction. The frictional force acts in the forward direction and tends to move him forward. His weight and normal force on his feet still act vertically and are both balanced since he does not move in the vertical direction.
So, there are four forces acting on him while he is walking. These are the backward push due to his leg on the ground and the frictional force between his feet in the horizontal direction and, his weight and normal force on his feet in the vertical direction.
A small block with mass 0.0350 kgkg slides in a vertical circle of radius 0.550 mm on the inside of a circular track. During one of the revolutions of the block, when the block is at the bottom of its path, point AA, the magnitude of the normal force exerted on the block by the track has magnitude 3.90 NN . In this same revolution, when the block reaches the top of its path, point BB, the magnitude of the normal force exerted on the block has magnitude 0.670 NN . Part A How much work was done on the block by friction during the motion of the block from point AA to point BB
Answer:
W_net = μ 5.58, μ = 0.1 W_net = 0.558 J
Explanation:
The work is defined by the related
W = F. d = F d cos θ
where bold indicates vectors.
In the case, the work of the friction force on a circular surface is requested.
The expression for the friction force is
fr = μ N
the friction force opposes the movement, therefore the angle is 180º and the cos 180 = -1
W = - fr d
the path traveled half the length of the circle
L = 2 π R
d = L / 2
d = π R
we substitute
W = - μ N d
Total work is initial to
W_neto = - μ π R (N_b - N_a)
let's calculate
W_net = - μ π 0.550 (0.670 - 3.90)
W_net = μ 5.58
for the complete calculation it is necessary to know the friction coefficient, if we assume that μ = 0.1
W_net = 0.1 5.58
W_net = 0.558 J
How do I solve this arithmetic sequence?
Answer:
The 16ᵗʰ term of this sequence is 82
Step-by-step explanation:
Here,
First Term = a₁ = 9
Common Difference = (d) = 2
Now, For 16ᵗʰ term, n = 16
aₙ = a + (n - 1)d
a₁₆ = 7 + (16 - 1) × 2
a₁₆ = 7 + 15 × 5
a₁₆ = 7 + 75
a₁₆ = 82
Thus, The 16ᵗʰ term of this sequence is 82
-TheUnknownScientist
A family is driving from Vancouver to Calgary, a distance of 907.3 km. During the first 300 km, they average 92 km/h. They stop for lunch for 38 min. They arrive in Calgary 8 h and 21 min after their lunch break.. What was their average speed (in km/h) for the entire journey, including the break?
Answer:
89 i would say
Explanation:
The weight of a luggage is 69.3 N on the moon. Find its weight on the Earth.
Answer:
415.8N
Explanation:
Given:
weight of a luggage = 69.3 N
But
✓(weight on the Earth) is equivalent to 6 times weight if the moon.
✓Then, weight on the Earth) =( 69.3N × 6)
✓weight on the Earth) = 415.8N
find the energy released when there is a decrease of 0.3kg of material in a nuclear reaction
Answer:
E = 2.7 x 10¹⁶ J
Explanation:
The release of energy associated with the mass can be calculated by Einstein's mass-energy relation, as follows:
[tex]E = mc^2[/tex]
where,
E = Energy Released = ?
m = mass of material reduced = 0.3 kg
c = speed of light = 3 x 10⁸ m/s
Therefore,
[tex]E = (0.3\ kg)(3\ x\ 10^8\ m/s)^2[/tex]
E = 2.7 x 10¹⁶ J
So what is 27+22? Is it
A 8338
B 8282
C 8228
D 8234
Answer:
You put the add sign, so it would be 49. I don't believe that is what you meant to put though.
Explanation:
i gotchu, 27+22 so you take the 8 and multiply that by the number of times you blink every 2 minutes and then divide that by 0×1 and carry the 3 and that gives you -7
Which law best describes contact force
A.
second law
B.
third law
C.
law of gravity
D.
first law
Answer: the third law
Explanation:
Fusion produces less radioactivity than fission.
True or false
Answer:
False
Explanation:
Fusion doesn't produce more.
Sara travels east 6 miles and then goes south 3 miles and then north 8 miles. What is her displacement? Round
your answer to two significant figures.
a
Ob
6.3 miles SW
7.8 miles SW
0 miles
5.7 miles SW
7.8 miles NE
6.3 miles NE
od
Оe
Of
5.7 miles NE
Oh
9.1 miles sw
9.1 miles NE
Answer:
Explanation:
so her displacement is the distance from the start... she's now at a point (6,5) away from the start.. so what's the length of the side of the right triangle made by one side of 6 and the other of 5
Yes.. use Pythagoras theorem to solve this
C = √([tex]6^{2}[/tex]+[tex]5^{2}[/tex])
C = √(36 + 25)
C = √61
C = 7.810 miles.. north east of where she started
C = 7.8 miles NE :P
A car travels at uniform velocity at a distance of 100 m in 4 seconds what is the velocity of the car
Answer:
the answer is 25
Explanation:
because the formula for velocity is distance divided by time.
How many molecules are in 5 moles of O2? A. 6.02 × 1024 B. 3.010 × 1024 C. 3.10 × 1024 D. 3.010 × 1023
There are b) 3.010 * 10 ^ 24 molecules in 5 moles of O2
What is mole ?
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilograms of carbon 12 .
Number of moles = 5 moles
Number of molecules = ?
Avogadro's number = 6.022 * 10^23
Number of molecules in 5 moles of O2= number of moles * Avogadro's number
= 5 * 6.022 * 10^23
= 30. 10* 10 ^23 = 3.011 * 10 ^ 24 molecules
There are b) 3.010 * 10 ^ 24 molecules in 5 moles of O2
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T/F The outer planets have solid surfaces that are very rocky and dense
Answer:
False
Explanation:
the inner planets have solid rocky dense surfaces
Objects A and B are brought close to each other. Object A will soon become positively charged. Identify the charge that must transfer for
this
situation to occur.
A girl runs 40m due south in 40 seconds an d then 20m due north in 10 secondsCalculate.
the average speed,
her average velocity .
in her change in velocity for the whole journey!
The average speed of the girl is 1.2 m/s.
Average velocity is defined as the trade in position or displacement (∆x) divided by the time durations (∆t) wherein the displacement takes place. The common velocity can be effective or negative depending upon the sign of the displacement. The SI unit of average velocity is meters per second (m/s or ms-1).
Given;
Total distance = 40 + 20 = 60 M
Displacement = 40 - 20 = 20 m south
total time = 40 + 10 = 50 seconds
Average speed = total distance / total time
= 60/50
= 1.2 m/s
average velocity = total displacement / total time
= 20 / 50
= 0.4 m/s due south.
Average velocity is calculated by means of dividing your displacement (a vector pointing out of your initial role in your final position) through the entire time; the average pace is calculated by way of dividing the overall distance you traveled by means of the total time.
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to lift
With a pulley system, you use more rope (distance), but need less (blank) to lift
the load
Ok so it is working ok!