Answer:
30m
Explanation:
Given parameters:
Speed of the goat = 1.5m/s
Time = 20s
Unknown:
Distance traveled = ?
Solution:
To solve this problem, we use;
Speed = [tex]\frac{distance}{time}[/tex]
Distance = Speed x time
So;
Distance = 1.5m/s x 20s = 30m
The common version of Newton’s second law of motion, EF= ma, is actually a special case that is true only when an objects _____ is constant.
-Mass
-Momentum
-Force
-Velocity
Answer:
A
Explanation:
only is true when the objects mass is constant
Answer:
A.
Explanation:
When the mass is constant. Newton's second law will work perfectly.
Fun fact you probably won't need to know this, but the original formula that Newton derived was F=change in momentum divided by change in time. Momentum will account for a change in mass. The schooling system lies to you all the time especially in physics.
why do engineers study momentum
Engineers study momentum because momentum is important. Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.
Answer:
Because...
Explanation:
Engineers are a big impact to America as well as the whole earth they need to study momentum because it helps and is main parts of being an engineer without knowing or studying what momentum I you will Have a very hard time
Help!! ASAP plz
Determine the mass of the object below to the correct degree of precision.
358.3g
358.20g
358.30g
358.2g
Explain the difference between transverse and longitudinal waves.
A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced upwards and downwards. In this case, the particles of the medium move perpendicular to the direction that the pulse moves. This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion.
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.
Tasha would like to work in a Securities and Protective Services job. Which qualifications would she need to succeed? O observational skills, critical thinking, and physical strength O knowledge of fire hazards, courage, and driving skills ability to challenge suspicious people, multi-tasking skills, and driving skills understanding of legal documents, integrity, and knowledge of laws
Answer:the answer is letter D
Explanation:
Any object or agent (biological, chemical, radiological, and/or physical) that has the potential to harm people, animals, or the environment is considered a hazardous material.
What are Hazardous material?This may be the result of the material's own properties or its interactions with other substances. The U.S. Environmental Protection Agency (EPA), the U.S. Occupational Safety and Health Administration (OSHA), the U.S. Department of Transportation (DOT), and the U.S.
Nuclear Regulatory Commission are primarily responsible for defining and enforcing laws and regulations related to hazardous materials (NRC). Each defines "hazardous substance" differently.
This includes chemicals such as carcinogens, irritants, corrosives, toxic agents, sensitizers, agents that damage the lungs, skin, eyes, or mucous membranes; chemicals that can combust, explode, are flammable, oxidizers, pyrophorics, unstable-reactive or water-reactive.
Therefore, Any object or agent (biological, chemical, radiological, and/or physical) that has the potential to harm people, animals, or the environment is considered a hazardous material.
To learn more about Hazardous material, refer to the link:
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If neutron stars are squeezed harder they collapse into black hole; how would this transition occur?
Answer:
If the neutron star's mass is then increased, neutrons become degenerate, breaking up into their constituent quarks, thus the star becomes a quark star; a further increase in mass results in a black hole.
Explanation:
hope this helps have a good night :)
If a spring constant of 128N/m is compressed by 0.18 m , how much potential energy is the spring?
Answer:
2.1J
Explanation:
Given parameters:
Spring constant = 128N/m
Compression = 0.18m
Unknown:
Potential energy of the spring = ?
Solution
The potential energy of the spring is the elastic potential energy within the spring.
To solve this;
Elastic potential energy = [tex]\frac{1}{2}[/tex] k e²
k is the spring constant
e is the compression
Now;
Elastic potential energy = [tex]\frac{1}{2}[/tex] x 128 x 0.18² = 2.1J
What does it mean if a galaxy gives off light that has been shifted toward the red end of the electromagnetic spectrum?
Answer:
the galaxy is moving away from us and the magnitude of the displacement gives the value of the relative velocity
Explanation:
The wavelength and frequency of light is affected by the relative motion of the Source (galaxy) and the observer (us on Earth); when the shift is towards the red it indicates that the bodies are moving away from each other.
Consequently the galaxy is moving away from us and the magnitude of the displacement gives the value of the relative velocity
Pls answer nowwwwwwwww
Answer:
1 or a the first bubble
Explanation:
In the figure shown, if angle i increases slightly, angler will
angle of
reflection
angle of
incidence
a. remain the same
Oc. increase
Ob disappear
O d. decrease
Answer:
Explanation:
According to law of reflection of light ,
angle of incidence = angle of reflection
angle of incidence = i
angle of reflection = r
when angle of incidence increases to i₁ and angle of reflection becomes r₁
According to law of reflection,
i₁ = r₁
i₁ - i = r₁ - r
increase in angle of incidence = increase in angle of reflection .
So angle of reflection also increases .
Ask Questions Action and reaction force pairs are all around you, but they aren't always obvious. Write down
a question about a situation in which you can't identify what force pairs are at work.
Answer:
Writing with a pencil. The pencil pushes on the paper. The paper pushes on the pencil.
Explanation:
Newton's third law.
What does it mean when wave
crests are close together?
A. the higher the amplitude
B. the lower the amplitude
C. the shorter the wavelength
D. the longer the wavelength
Answer: C
Explanation:
Waves with a higher frequency have crests that are closer together, so higher frequency waves have shorter wavelengths.
Wall-E the robot is resting when he randomly explodes into two pieces that fly off in opposite directions. His head has a mass of 0.75 kg and flies off to the right with a velocity of 75 m/s. If his body has a mass of 6.2 kg, what was its velocity after the explosion?
______________m/s (nearest hundredth)
Answer:
The body flies off to the left at 9.1 m/s
Explanation:
Law Of Conservation Of Linear Momentum
It states the total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and speed v is
P=mv.
If we have a system of bodies, then the total momentum is the sum of the individual momentums:
[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]
If a collision occurs and the velocities change to v', the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]
Since the total momentum is conserved, then:
P = P'
In a system of two masses, the equation simplifies to:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2\qquad\qquad[1][/tex]
Wall-E robot is initially at rest, its two parts together. His head has a mass of m1=0.75 kg and his body has a mass of m2=6.2 kg. Both parts have initial speeds of zero v1=v2=0.
After the explosion, his head flies off to the right at v1'=75 m/s. We are required to find the speed of his body v2'. Solving [1] for v2':
[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2}[/tex]
Substituting values:
[tex]\displaystyle v'_2=\frac{0.75*0+6.2*0-0.75*75}{6.2}[/tex]
[tex]\displaystyle v'_2=-9.1 \ m/s[/tex]
The body flies off to the left at 9.1 m/s
Reading the temperature of a solution by using a thermometer is an example of a(n) ________.
A.
hypothesis
B.
observation
C.
inference
D.
conclusion
Answer:
B. Observation
Explanation:
Using a thermometer to read the temperature of a solution is tantamount to the making an observation.
Observation are recorded using our senses of sight, taste, earing, feeling etc or by the use of instrument.
Through observation, data is usually collected to make inferences about an experiment. An observation leads to the formulation of a hypothesis which is scientific guess that leads to experimental designs. Conclusions are drawn from the information of data obtained from an experiment.What is happening to the average kinetic energy of the molecules in a pot of water when it is heated on a stove? Explain your answer.
Answer:
Explanation:
The average kinetic energy of molecules in a pot increases when it is heated on a stove . The heat energy is spent to decrease the intermolecular attractive force . The result is increase in kinetic energy due to increase in the velocity of molecules
formula for kinetic energy of one mole of a monoatomic gas
= 3/2 RT
when temperature increases , kinetic energy increases .
Indiana Jones is being chased over the rooftops of Marseilles by some random villain. He looks ahead and sees that there is a 7 meter gap between this rooftop, which is 25 meters above the ground, and the next, which is 19 meters above the ground. He gathers up all his strength and runs and leaps from the higher roof to the lower. How fast must he run so he doesn't go plummeting into the street below? *
5 points
Answer:
30 mph
Explanation:
Please help me
27. A 20 kg object is at rest. A 6 N force pulls to the right on
the object for 10 seconds.
A) Find the impulse on the object.
B) Find the final momentum of the object.
C) What is its final velocity?
Answer:
a. 60 N*s
b. 60 (kg*m)/s
c. 3 m/s
Explanation:
Givens:
m = 20 kg
v_i = 0 m/s
t = 10 s
F = 6 N
a) Impulse:
I = F*t
I = 6 N*10 s
I = 60 N*s
b) Momentum:
p = v*m
F = m(a)
a = F/m
a = 6 N/20 kg
a = 0.3m/s^2
a = (v_f -v_i)/t
v_f = (0.3 m/s^2)*10 s
v_f = 3.0 m/s
p = 3 m/s*20 kg
p = 60 (kg*m)/s
c. Final velocity
a = (v_f -v_i)/t
v_f = (0.3 m/s^2)*10 s
v_f = 3.0 m/s
The impulse, momentum and final velocity can all be obtained from Newton's second law.
Let us recall that the impulse is obtained as the product of force and time.
Impulse = Force × time
Impulse = 6 N × 10 s = 60 Ns
From Newton's second law of motion;
F.t = mv - mu
Since the object was initially at rest;
F.t = mv
Hence, the final velocity of the object is 60 Kgms-1
The final velocity is obtained from;
F.t = mv
v = F.t/m
v = 6 × 10/20
v = 3 m/s
Learn more about impulse and momentum: https://brainly.com/question/904448
Define the terms resultant and equilibriant of
two forces acting at a point. Explain the
difference between the two terms.
Find the magnitude and direction of (a) the
resultant (b) the equilibriant of two forces, 10
N acting in the direction N 30 East and 15 N
acting in the easterly direction, if both forces
act at a point.
Answer:
1) Resultant and Equilibrant explained below
2) Resultant = 24.18 N in a direction of 11.93° NE
3)Equilibrant = 24.18 N in a direction of 11.93° SW
Explanation:
1) Resultant force: If two or more forces are acting at a certain point, their resultant force would be defined as the force that when applied at that same point, it will have the exact same effect like the two independent forces acting together.
Equilibrant of 2 forces: This is defined as the force exactly equal and has an opposite direction to the resultant
2)a.) we are told that 10 N acts in the direction N 30 East and 15 N acts in the easterly direction, if both forces
act at a point. Thus, coordinates are;
(10cos30,10sin30) and (15,0)
Therefore, resultant coordinate is;
R→ = (10cos30, 10sin30) + (15, 0)
R→ = (15 + 10cos30, 0 + 10 sin 30)
This gives;
R→ = (23.66, 5)
Thus the resultant is;
R = √(23.66² + 5²)
R = √584.7956
R = 24.18 N
b) direction is gotten from;
tan θ = 5/23.66
θ = tan^(-1) 5/23.66
θ = 11.93° NE
c) Equilibrant is equal force but opposite direction. Thus, Equilibrant = 24.18 N in a direction of 11.93° SW
A sound wave travels at 340 m/sec and has a wavelength of 2.5 meters. Calculate its frequency and period.
Answer:
136Hz
0.0074s
Explanation:
Given parameters:
Velocity of the wave = 340m/s
Wavelength = 2.5m
Unknown:
Frequency and period = ?
Solution:
To solve this problem, we use the wave velocity equation;
V = F ∧
V is the velocity
F is the frequency
∧ is the wavelength
Let us find the frequency
340 = F x 2.5
F = 136Hz
Period is the inverse of frequency;
Period = [tex]\frac{1}{136}[/tex] = 0.0074s
An airplane accelerates from a speed of 88m/s to a speed of 132 m/s during a 15 second time interval. How far did the airplane travel during the time interval?
Answer:
[tex]1650\:\mathrm{m}[/tex]
Explanation:
We can use the following kinematics equations to solve this problem:
[tex]v_f=v_i+at,\\{v_f}^2={v_i}^2+2a\Delta x[/tex].
Using the first one to solve for acceleration:
[tex]132=88+a(15),\\15a=44,\\a=\frac{44}{15}=2.9\bar{3}\:\mathrm{m/s^2}[/tex].
Now we can use the second equation to solve for the distance travelled by the airplane:
[tex]132^2=88^2+2\cdot2.9\bar{3}\cdot \Delta x,\\\Delta x= \frac{9680}{2\cdot2.9\bar{3}},\\\Delta x =\fbox{$ 1650\:\mathrm{m}$}[/tex](three significant figures).
I’m NC the wind is blowing from the north. If the wind changes direction and begins to blow from the south, what will most likely result.
NC means North Carolina.
Answer:
The temperatures will increase.
Explanation:
What will happen is that the temperature will increase. This is because, in wind direction and weather forecasting, a wind that shifts from the south means that warmer air/temperatures are approaching whereas a wind shift from the north implies that cooler air/temperatures are approaching.
Which one doesn't belong in the group? oxygen, sulfur, selenium,
tellurium *
Your answer
This is a required question
borons
A force of 49 Newtons is applied to a rock, which causes it to be lifted 2 meters in 5 seconds. How much power is exerted during this time?
Select one:
9.8 W
19.6 W
56.4 W
98 W
Answer: 19.6 watts
=================================================
Explanation:
power = (change in work)/(change in time)
p = w/t
work = force*displacement
w = f*d
So we can say:
p = (f*d)/t
We know the following
f = 49 = applied forced = 2 = displacementt = 5 = change in timeLeading to...
p = (f*d)/t
p = (49*2)/5
p = 98/5
p = 19.6 watts
Side note: 1 watt is equal to 1 joule per second
A rectangle box was measured with a length of 4cm, width 2cm, and height 2cm. What is the volume of the box?
Answer:
volume is 64
Explanation:
2×2×4×4
=64
Answer:
[tex]V = 16\ cm^3[/tex]
Explanation:
The Volume of a Rectangular Prism
A rectangular prism is also called a rectangular box and has three dimensions all perpendicular to each other.
Given a rectangular prism of length L, width W, and height H, the volume is calculated as:
V = WLH
We are given the dimensions of a rectangular box: L= 4 cm, W = 2 cm, H = 2 cm. Computing the volume:
V = 2 cm * 4 cm * 2 cm
[tex]\mathbf{V = 16\ cm^3}[/tex]
Need help on number 5 and 6
Answer:
jowieahudsfnkdmlew2l,poeq3riugjnkfmdko
Explanation:
Answer:
b and c
Explanation:
hopes this helps i took the test.
The potential difference across a piece of wire is 2.1 v the current in the wire is 0.30 a calculate the resistance of the wire in ohms
Answer:
7ΩExplanation:
Given:
V = 2.1 v
I = 0.30 A
R = Unknown
Solution:
R = V / I
= 2.1V / 0.30A
= 7Ω
Answer:
7Ω is the resistance of the wire in ohms
The resistance of the wire will be 7 ohms. Resistance is the antagonism strength shown in the discharge of the electric current.
What is resistance ?Resistance is the opposition force offered in the flow of the electric current. It is denoted by R.It s unit is ohms.
The given data in the problem is;
V is the potential difference = 2.1 v
I is the current = 0.30 A
R is the resistance =?
According to Ohm's law resistance is the ratio of the voltage to the current.
[tex]\rm R = \frac{V}{I} \\\\ \rm R = \frac{2.1}{0.30} \\\\ \rm R = 7 \ ohm[/tex]
Hence the resistance of the wire will be 7 ohms.
To learn more about the resistance refer to the link;
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The acceleration of an object would increase if there was an increase in:
A.mass of the object
B.force on the object
C.inertia of the object
D.friction in the object
Answer:
Its either B or A
Explanation:
At the top of a roller coaster 20 m above the ground the 5 kg car is moving at 2 m/s how fast is it moving at the bottoms of the hill
Answer:
VB = 19.9 [m/s]
Explanation:
In order to solve these problems, we must use the principle of energy conservation. Which tells us that the energy between two points after an instant of time must be equal. This is we have two points A & B, in point A is the highest point while Point B is the lowest
Now we need to identify the types of energy at each point.
For point A
At this point we have two energies, the kinetic energy since the roller coaster moves at a speed of 2 [m/s], in the same way there is potential energy since the roller coaster is 20 [m] above ground level.
For point B
At Point B we only have kinetic energy, since it is located at zero meters with respect to the ground. In this way we can determine the velocity at this point.
And the energy is expressed by means of the following expression:
[tex]E_{A}=E_{B}\\\frac{1}{2} *m*v_{A}^{2} +m*g*h_{A}=\frac{1}{2} *m*v_{B}^{2}[/tex]
where:
m = mass = 5 [kg]
VA = velocity of the roller coaster in point A = 2[m/s]
hA = elevation of the roller coaster = 20 [m]
vB = velocity of the roller coaster in point B [m/s]
Now replacing:
[tex]\frac{1}{2}*5*(2)^{2} +(5*9.81*20)=\frac{1}{2}*(5)*v_{B}^{2}\\991=2.5*v_{B}^{2}\\v_{B}x^{2} =991/2.5\\v_{B}=\sqrt{396.4} \\v_{B}=19.9[m/s][/tex]
How many miles did a plane travel if it flew 455 miles per hour in 3 hours? What formula did you have to use?
Answer:
1,365 miles
Explanation:
i multiplied 455 x 3 because it traveled 455 miles an hour for three hours.
A negative charge of -0.00067 C and a positive charge of 0.00096 C are separated by 0.7 m. What is the force between the two charges?
Answer:
-11,813.87N
Explanation:
According to coulombs law, the Force between the two charges is expressed as;
F = kq1q2/d²
k is the coulombs constant = 9*10⁹kg⋅m³⋅s⁻²⋅C⁻².
q1 = -0.00067 C
q2 = 0.00096 C
d = 0.7m
Substitute into the formula:
F = 9*10^9 * -0.00067 * 0.00096/0.7²
F = 9*10⁹*-6.7*10⁻⁴*9.6*10⁻⁴/0.49
F = -578.88*10⁹⁻⁸/0.49
F = -578.88*10/0.49
F = -5788.8/0.49
F = -11,813.87N
Hence the force between the two charges is -11,813.87N