Answer: D
Explanation: it seem right to me I really don't know if this right but I hope this helps
Speed and velocity are not the same thing.How?
Explanation:
speed only have magnitude whereas velocity have magnitude and direction
A 2kg rock is at the edge of a cliff 20m above the surface of a lake. What is its potential energy at the top of the cliff?
Please show work!
Answer:
392 j
Explanation:
potential energy (PE) is equal to the mass of the object multiplied by the acceleration due to gravity multiplied by the height of the object.
PE=mgh (g=9.8 m/s/s)
PE= (2 kg)(9.8 m/s/s)(20 m)
PE= 392 j
j= joules
Hello question for JungKookLuver and jguzman577. What’s my favorite color don’t answer! Or you get reported!
Answer: Green!
Explanation: ThankYou bro
1. An express train, traveling at 36 m/s, is accidentally sidetracked onto a local train track. The express engineer spots a local train 100 m ahead on the same track and traveling in the same direction at a constant 11 m/s. The local engineer is unaware of the situation. The express engineer jams on the brakes and slows the express at 3.0 m/s2. (a) To determine whether the trains collide, use kinematics to calculate their positions when the express train stops: i. How much time will it take the express train to stop? ii. In that time, how far will the express train have moved? iii. In that time, how far will the local train have moved? iv. Based on the results of ii. and iii., do the trains collide? Explain.
Answer:
(i) 12 seconds
(ii) 216 meters from the initial position
(iii) 132 meters from the initial position
(iv) No
Explanation:
Speed of express train =36 m/s
Speed of local train =11 m/s
The initial distance between the local train and passenger train =100 m.
Due to the application of breaks, the express train slows at the rare of [tex]3.0 m/s^2.[/tex]
So, the acceleration of the express train, [tex]a=-3 m/s^2[/tex].
(i) Let t be the time the express train takes to stop.
From the equation of motion,
v=u+at
where, v: final velocity, u: initial velocity, a: constant acceleration, t: time taken to change the speed from u to v.
In this case, v=0, u=36 m/s, [tex]a=-3 m/s^2[/tex]
So, 0=36+(-3)t
[tex]\Rightarrow t= 36/3=12[/tex] seconds.
(ii) To compute the distance traveled, s, till the express train stops, using
[tex]v^2=u^2+2as[/tex]
[tex]\Rightarrow 0^2=36^2+2(-3)s[/tex]
[tex]\Rightarrow s=\frac{36\times36}{6}[/tex]
[tex]\Rightarrow s=216[/tex] meters.
(iii) The local train is moving at a speed of 11 m/s
So, in 12 seconds, the distance, d, traveled by the local train
d= 11x12=132 meters [as distance= speed x time]
(iv) Let 0 be the reference position which is the initial position of the express train.
So, at the initial time, the position of the local train is at 100m.
After 12 seconds:
The position of the express train is at 216 m [using part (ii)]
and the position of the local train is at 100+132=232m [using part (iii)].
So, the local train is still ahead of the express train, hence the trains didn't collide.
(b) What are the dimensions of a and b in the relation F = a*x^0.5+ bt^2 where F is force, x is distance and t is
time.
Answer:
It is 5F
Explanation:
A cat, which mass 2.5 kg walks on a uniform plank of 4.0m long and mass 6.0kg. Two sawhorses at 0.3m and 2.4m from its right end to support the plank as shown in figure. The cat walks on it from right to the left until a certain position where the plank just begin to tip. Calculate the position of the cat from the left sawhorse when the plank just begin to tip .
Answer:
Explanation:
Let when cat reaches the point L distance from the right end , the plank starts turning about the left sawhorse.
The weight of the plank will at at middle point , ie at 2 m from the right end .
The plank will turn about the left sawhorse . Taking torque about this point of weight of the plank and weight of the cat , we have
2.5 g x ( L - 2.4 ) = 6 x g x ( 2.4 - 2.0 )
2.5 L - 6 = 14.4 - 12
2.5 L = 8.4
L = 3.36
position from left sawhorse = 3.36 - 2.4 = .96 m to the left of left sawhorse.
Waste of points. Claim if you want.
the center of mass is located a distance x from the less-dense end. Explain how Blake can determine the location of the center of mass
Blake can determine the center mass by dividing the product of less dense and its position by the sum of the two end densities.
What is center mass?The center mass of an object is the point on the object where the weighted relative position of the distributed mass sums to zero.
Blake can determine the location of the center mass as follows;
Let the end position of the high dense = 0Let the density of the "high dense end" = ρ₁Let the density of the "less dense end" = ρ₂[tex]C_{xm }= \frac{\rho_1 (0) + \rho(x)}{\rho_1 + \rho_2} \\\\C_{xm }= \frac{\rho(x)}{\rho_1 + \rho_2}[/tex]
Thus, Blake can determine the center mass by dividing the product of less dense and its position by the sum of the two end densities.
Learn more about center mass here: https://brainly.com/question/13499822
A cat jumps up and sits on the lap of a woman who is sitting in the chair. The cats weight is 40 newtons. What is the reaction force provided by the chair now?
Answer:
540 newtons.The weight of the chair is 90 N. Action-reaction pairs include the cat-woman’s lap, the woman- chair, the chair-strongman, and the strongman-ground.
Explanation:
pls give brainliest
A slingshot is used to shoot a BB at a velocity of 96 feet per second straight up from ground level. When will the BB reach its maximum height of 144 feet?
The time taken for the BB to reach its maximum height is 1.5 seconds.
What is time?Time can be defined as the measure of duration or period of past, present or future event.
To calculate the time it will take BB to reach the maximum height,
la we use the formula below
Formula:
v = d/t............ Equation 1Where:
v = velocityd = distance/heightt = timeMake t the subject of the equation
t = d/v............ Equation 2From the question,
Given:
d = 144 feetv = 96 feet/secondSubstitute these values into equation 2
t = 144/96t = 1.5 seconds.Hence, The time taken for the BB to reach its maximum height is 1.5 seconds.
Learn more about time here: https://brainly.com/question/17146782
A motorcycle accelerates at 10 m/s2 to reach a final velocity of 50 m/s from rest. How much time passed during the acceleration?
Answer:
t = 5 s
Explanation:
We'll need this equation:
Vf = Vi + at
Rearranging the equation to solve for time, we get:
t = ( Vf - Vi ) / a
Plugging in what we know, we get:
t = ( 50 m/s - 0 m/s ) / 10 m/s^2
t = 5 s
3. For a constant launch speed, what angle produces the same range
as a launch angle of
a) 30°?
b) 15°?
Answer:
A) 60 degrees B) 75 degrees
Explanation:
You use complementary angles to solve this. A complementary angle is when two angles add up to 90 degrees. For A), it says that the angle is 30 degrees. So you can do 90 minus 30 and you get 60. For B), it’s says the angle is 15 degrees. So you do 90 minus 15 and you get 75 degrees.
11. The measurement of an object's mass is a
a. physical change
b. physical property
c. chemical
d. chemical property
change
Two identical charges are located 1 m apart and feel a 1 N repulsive electric force. What is the charge of each particle.
The charge on each particle is 3.3×10⁻⁵ C.
What is charge?Charge is the product of current and time.
To calculate the charge on each particle, we use the formula below.
Formula:
q = √(Fr²/k).............. Equation 1Where:
q = Charge on each particleF = Force of repulsionr = Distance between the chargek = coulomb's constant.From the question,
Given:
F = 1 Nr = 1 mk = 8.99×10⁹ Nm²/C²Substitute these values into equation 1
q = √[(1×1)/(8.99×10⁹)]q = 3.3×10⁻⁵ CHence, the charge on each particle is 3.3×10⁻⁵ C.
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What exactly is Aphelion Phenomenon?
Answer:
aphelion, in astronomy, the point in the orbit of a planet, comet, or other body most distant from the Sun. When Earth is at its aphelion in early July, it is about 4,800,000 km (3,000,000 miles) farther from the Sun
What exactly is Aphelion Phenomenon?
➪ Aphelion is the point in the orbit of a celestial body like planet, comet or other body most distant from the sun.
In simpler words, When a celestial body is fathest from the sun this phenomena is known as Aphelion Phenomenon....~
Example:-
When the Earth is at its aphelion point it is 4,800,000 km (3,000,000 miles) farther from the Sun.The isotope of an atom containing 40 protons and 51 neutrons suddenly has two neutrons added to it.
What isotope is created?
Answer:
91 :)
Explanation:
Describe the sequence of the formation of the solar system. Make sure you include these terms: solar nebula, planetesimals, protoplanets, protosun, condensation, accretion, differentiation, Jovians, terrestrials.
Answer:
Explanation:
e Sun and planets began to form in a rotating cloud of nebular gas and dust. These materials eventually clumped together with a hot protosun at the center and chunks of planetesimals rotating around it. Through repeated collisions, the planetesimals grew into protoplanets, and eventually the solar system came about.
The sequence of the solar system formation is started from sun and the planet's origination 4.6 billion years ago from the solar nebula, a cloud of gas and dust.
What is the solar system?The solar system consists of the planet's satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium.
The Sun and planets formed in a revolving cloud of nebular gas and dust. These components finally clumped together, creating a hot proton in the middle with fragments of planetesimals orbiting around it.
Planetesimals developed into protoplanets as a result of repeated collisions, and the solar system finally formed.
Hence,the sequence of the solar system formation is started from sun and the planet's origination 4.6 billion years ago from the solar nebula, a cloud of gas and dust.
To learn more about the solar system, refer to the link;
https://brainly.com/question/1207587
#SPJ2
You are given the right triangle shown. Which of the following equations would be a correct way to solve for the missing information
A. I and then II or III
B. I and II only
C. II or III only
D. You must use all
Answer:
Option A. I and then II or III
Explanation:
From the question given above, the following data were obtained:
Angle = θ
Opposite = 16 m/s
Adjacent = 24 m/s
Hypothenus = v
i. The value of θ can be obtained by using Tan ratio as show below:
Tan θ = Opposite / Adjacent
Opposite = 16 m/s
Adjacent = 24 m/s
Tan θ = 16 / 24
ii. Cos θ = Adjacent /Hypothenus
Adjacent = 24 m/s
Hypothenus = v
Cos θ = 24 / v
Cross multiply
v × Cos θ = 24
Divide both side by Cos θ
v = 24 / Cos θ
iii. Sine θ = Opposite /Hypothenus
Opposite = 16 m/s
Hypothenus = v
Sine θ = 16 / v
Cross multiply
v × Sine θ = 16
Divide both side by Sine θ
v = 16 / Sine θ
From the above illustrations, we can use (i) to obtain θ then we can use (ii) or (iii) to obtain the value of v.
When a force of 50 newtons acts on a mass of 10 kilograms, what is the resulting
acceleration in m/s2?
Answer:
The answer is 5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
From the question we have
[tex]a = \frac{50}{10} \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
Meat-eating desert reptiles depend on which of the following biotic factors to supply their needs?
Daytime temperature ranges above 30 degrees Celsius
Condensation of moisture on plants for drinking water
OSmall animals in their habitat on which they feed
Plants that bear fruits during the summer months
Meat-eating desert reptiles depend on small animals in their habitat on which they feed.
What is the need of meat eating desert reptiles?Meat-eating desert reptiles depend on small animals that lives to their surrounding. On these animals, these meat eating desert reptiles feed and fulfill their requirements of food so we can conclude that meat eating reptiles needs small animals present in the desert for feeding.
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Maribel has an iron rod around which she wraps copper wire. She places the device on a table near a compass. What will happen to the compass if she sends current through the copper wire?
A.The needle of the compass will point at a right angle to the device
B. The needle of the compass will point toward the device
C. The needle of the compass will show no effect
D.The needle of the compass will spin in circles
If Maribel sends current through the copper wire in the iron rod, the needle of the compass will point toward the device.
What is electric current?Electric current is the rate of flow of electric charge.
According to this question, Maribel has an iron rod around which she wraps copper wire. She places the device on a table near a compass.
If Maribel sends current through the copper wire in the iron rod, the needle of the compass will point toward the device because the metallic needle is attracted in the direction of the current.
Learn more about electric current at: https://brainly.com/question/7643273
Rank the six combinations of electric charges on the basis of the electric force acting on q1.
a.
q1= +1nC
q2= -1nc
q3= -1nc
b.
q1= -1nC
q2= +1nc
q3= +1nc
c.
q1= +1nC
q2= +1nc
q3= +1nc
d.
q1= +1nC
q2= +1nc
q3= -1nc
e.
q1= -1nC
q2= -1nc
q3= -1nc
f.
q1= +1nC
q2= -1nc
q3= +1nc
Answer:
Largest; options A & B
2nd largest; Option F
3rd Largest; Option D
Smallest; Options E & C
Explanation:
Looking at the charges, basically, the net force of the charge q1 is the sum of charges q2 and q3.
When 2 charges are opposite, the force will be attractive but if they are same, then the force will be repulsive.
Thus, the order of the forces is;
I) Largest: q1= +1nC, q2= -1nc, q3= -1nc and (q1= -1nC, q2= +1nc, q3= +1nc)
II) Second largest is: q1= +1nC, q2= -1nc, q3= +1nc
III) Third largest: q1= +1nC, q2= +1nc, q3= -1nc
IV) Smallest: (q1= -1nC, q2= -1nc, q3= -1nc) and (q1= +1nC, q2= +1nc, q3= +1nc)
A car with a mass of 1,400 kg is traveling at a speed of 40 m/s. What is its momentum?
(P=m*v) P=momentum, m=mass, and v=Velocity.
Answer:
The answer is
56,000 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocityFrom the question
m = 1400 kg
v = 40 m/s
We have
momentum = 1400 × 40
We have the final answer as
56,000 kgm/sHope this helps you
A 20 ohm lamp and a 5 ohm lamp are connected in series and placed across a potential difference of 50 V.
1. What is the equivalent resistance of the circuit?
2. What is the voltage drop across each lamp?
3. What is the power dissipated in each lamp
Hi there!
1.
Since the two resistors are in series, we can simply add:
[tex]R_T = R_1 + R_2 + ... R_n[/tex]
[tex]R_T = 20 + 5 = \boxed{25 \Omega}[/tex]
2.
In series, the potential difference of each resistor (lamp) ADDS UP. We can begin by finding the current through the circuit using Ohm's law:
[tex]V = IR\\\\I = \frac{V}{R_T}[/tex]
Plug in the values:
[tex]I = \frac{50}{25} = 2 A[/tex]
Now,
we can use Ohm's law to find the individual voltage for each lamp.
20 Ohm lamp:
[tex]V = 2 * 20 = \boxed{40 V}[/tex]
5 Ohm lamp:
[tex]V = 2 * 5 = \boxed{10 V}[/tex]
3.
To solve, we can use the power equation.
[tex]P (\text{Watts})= IV[/tex]
Plug in the values for each.
20 Ohm lamp:
[tex]P = 2 * 40 = \boxed{80 W}[/tex]
5 Ohm lamp:
[tex]P = 2 * 10 = \boxed{100 W}[/tex]
if i got rolled over and then survided and then i would go home then i died what happened
Answer:
you had probably died from the impact
Explanation:
because you got rolled over you would probably died due to your organs being damage and wouldn't function properly
A solenoid used to produce magnetic fields for research purposes is 2.5 mm long, with an inner radius of 30 cmcm and 1300 turns of wire. When running, the solenoid produced a field of 1.4 TT in the center. Part A Given this, how large a current does it carry
Answer:
2.14 A
Explanation:
L = 2.5 mm, N = 1300, B = 1.4 T, find I
B = μ₀N*I/L
so I = B*L/(μ₀N) = 1.4 * 0.0025/(4π x 10⁻⁷ x 1300) = 2.14 A
Through an orbit what remains constant ?
a. Kinetic energy
B. Potential energy
C. Total energy
D. Work
Answer:
c. Total energy
Explanation:
An "orbit" is a path for an object to follow. An example of an object is the "satellite."
At certain points in the orbit, the satellite increases its speed and decreases its speed in relation to the gravity caused by the Earth. As it moves farther away from the Earth, its speed slows down. So, this means that the kinetic energy changes. It also gains and loses height which is responsible for the changes occurring regarding potential energy. This is true for elliptical motion of satellites.
However, the total mechanical energy (TME) of the satellite remains the same or is unchanged (elliptical/circular).
Which type of force is a noncontact force?
O A. Buoyancy
O B. Any normal force
O C. Air resistance
O D. Any fundamental force
Answer:D>D>D>D>D>D>D>D>>D>D>D>D>D>D>D>D>D>
Explanation:
Answer:
O D. Any fundamental force
Explanation:
got it right on the test
What is formula for finding period of a planet if its mass is found by sending a spacecraft
According to Newton's First Law, what will an object in straight-line motion
tend to do?
O A. Slow down because of friction
B. Speed up
C. Stay in straight-line motion
D. Experience a force
Answer:
It will remain in straight-line motion at constant speed until acted on by an
external force. Moreover, it'll not only tend to do that ... it'll actually do it.
Explanation: