Answer:
A) t = 900 s, the meeting time is 2 h 15 min p.m, B) x = 15000 m
Explanation:
A) This is an exercise in kinematics, we must assume that car A is behind so that it can catch up with the slower car B.
car A
x = x₀ₐ + v₀ₐ t
car B
x = x_{ob} + v_{oB} t
in this case x₀ₐ = 5 km and the initial position. B is zero
at the bare point the position of the two vile cars is the same.
x₀ₐ + v₀ₐ t = v_{ob) t
x₀ₐ = (v_{ob} - v₀ₐ) t
t = [tex]\frac{x_{oa}}{v_{ob} - v_{oa} }[/tex]
let's reduce the magnitudes to the SI system
x₀ₐ = - 5 km (1000m / 1 km) = -5000 m
v₀ₐ = 80 km / h (1000 m / 1km) (1 h / 3600 s) = 22.22 m / s
v_{ob} = 60 km / h (1000 m / 1 km) (1 h / 3600s) = 16,667 m / s
let's calculate
t = [tex]- \frac{5000}{16.667 - 22.222}[/tex]
t = 900 s
let's reduce to minutes
t = 900 s (1 min / 60 s) = 15 min
Therefore, the meeting time is 2 h 15 min p.m.
B) at what point are they
x = v_{ob} t
x = 16,667 900
x = 15000 m
Which of the following is/are true of a vector? Check all that apply.
1. Velocity is a vector quantity.
2. Distance is a vector quantity.
3. The magnitude of a vector cannot be zero unless all of its components are zero.
4. A vector can have positive or negative magnitudes.
5. Vectors indicate quantity and direction.
Answer:
3
Explanation:
A 12 V battery is connected to a circuit with a 4 resistor. What is the current through the resistor?
О ЗА
8A
16 A
O 48 A
3. Conduction will occur between objects at different temperatures that are
A separated, but not in contact with each other
B in contact with each or separated
C in contact with each other, but not separated
Emma is making jelly. In order to make it dissolve quickly, should Emma put the block of jelly in whole, or
break it into cubes? Explain your answer.
[2 marks]
Answer:
Break it into cubes. When you make the thing that is dissolving smaller, the surface area of the thing dissolving it is larger, making the jelly more exposed.
How would radiation occur in space?
Answer:
Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.
Explanation:
The vertical columns on the periodic table of elements are called groups.
A True
B. False
Answer:
True
Explanation:
A spring oscillates with a period of
0.228 S. What is its frequency?
(Unit = Hz)
Answer:4.39
Explanation:For acellus students the answer is 4.39
Electric field shows the strength and what of an electric field
Answer:
a region in which particles with an electric charge will experience a force
Explanation:
let me know if its wrong . sorry if it is
Which statement describes a difference between insulators and conductors?(1 point)
Insulators have high conductivity, while conductors have low conductivity.
Insulators can transmit electric current, while conductors cannot.
Insulators are made of metallic materials, while conductors are not.
Insulators have high resistance, while conductors have low resistance.
Answer:
The "Insulators have high resistance, while conducters have low resistance".
The difference between insulators and conductors is insulators have high resistance, while conductors have low resistance.
What is insulator?An insulator is a material that does not allow easy passage of electric current through it. In other words, these materials have high resistance to the flow of current.
What is conductor?A conductor is a material that allows easy passage of electric current through it. In other words, these materials have low resistance to the flow of current.
Thus, the difference between insulators and conductors is insulators have high resistance, while conductors have low resistance.
Learn more about Insulator here: https://brainly.com/question/1472743
how does 3rd class lever make our work easier
Answer:
the third class lever makes our work easier as effort is located at the middle, load at first and fore is applied at the buttom. which helps in accelerating work.
hope it is helpful to you
how does lightning occur
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Answer:
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. ... This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
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Brainliest?
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Answer:
Lightning can be explained in terms of charges produced due to rubbing. During a thunderstorm, the air currents move upwards and the water droplets move downwards. And this caused due to the separation of charge due to this vigorous motion.
Explanation:
List 3 main types weathering
Answer:
3 types of weathering are, physical, chemical and biological weathering.
Explanation:
Hope this helps and have a wonderful day!!!
when a human cannon ball shoots in the air for 9 seconds, she travels 37 meters before ut lands. Caculate the speed
Answer:
9.1 mph
Explanation:
What 2 materials are the planets in our solar system made of?
Please answer this quickly please please please please please please please
they are made up of rock and gas
Answer:
Hydrogen and Helium. 75% Hydrogen and 25% Helium.
Explanation:
In a chemical reaction, an iron atom becomes the ion Fr2+ . What happened to the ion atom
Answer:
In a chemical reaction, an iron atom became the ion which means that iron atom by loosing two electrons from its valence shell has oxidized into positively charged ion
Explanation:
The codons ___, ___ and ___ are the stop codons that signal the termination of translation.
ACA
UGG
UAA
UGA
UCC
UAG
Answer:
uaa,uag,uga
Explanation:
What is the genotypes for HH or hh called?
What happens when waves slow down and change direction?
Answer:
Refraction
Explanation:
Refraction is the change in direction of a wave as it slows down. ... Tsunamis also refract around land masses
A ball of mass 0.5 kg is swinging at a small angle from a light string of length 0.25 m. What is the period of this pendulum? Round answer to two significant digits.
Answer: 1.0
Explanation:
not sure why but that is the correct answer
Answer:
1.0
Explanation:
Correct answer on Khan Academy
Please help Best answer gets BRAINLIEST
A skier waits at the top of a 11.7m hill. He then skis down the slope at an angle of 27 degrees above horizontal. What will his velocity be at the bottom of the hill? Show work
Answer:
v = 3.89 m / s
Explanation:
For this exercise let's use the concept of conservation of mechanical energy
starting point. In the highest part of the mountain
Em₀ = U = m g h
final point. In the lower part
Em_f = K = ½ m v²
how energy is conserved
Em₀ = Em_f
mgh = ½ m v²
v = [tex]\sqrt{ 2gh}[/tex]
let's use trigonometry to find the height
sin θ = h / L
h = L sin θ
we substitute
v = [tex]\sqrt{ 2g L \ sin tea}[/tex]
let's calculate
v = [tex]\sqrt{2 \ 9.8 \ 1.7 \ sin 27}[/tex]
v = 3.89 m / s
in which of the following does enstein's famous equation apply?
A. a driver brings a car to a halt
B. collisions between objects
C. water falling in a waterfall
D. nuclear fission and fusion reaction
Answer:
D
Explanation:
Can an object have both kinetic energy and gravitational potential energy? Explain.
Answer:
Yes
Explanation:
An object can be moving (have kinetic energy) and be elevated above the ground at the same time (and also have potential energy).
Yes an object can be moving have kinetic energy and be elevated above the ground at the same time and also have potential energy.
What is energy?Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. Following work, energy is transmitted to the item, which causes it to move at a new, constant speed. An object can store energy as the result of its position is potential energy.
An object can be moving have kinetic energy and be elevated above the ground at the same time and also have potential energy.
To learn more about energy refer to the link:
brainly.com/question/1932868
#SPJ2
How does the Coriolis effect influence the direction of the Trade Winds in the Northern Hemisphere? Does it have the same effect in the Southern Hemisphere?
Answer:
Part A
Coriolis effect is used to describe how objects which are not fixed to the ground are deflected as they travel over long distances due to the rotation of the Earth relative to the 'linear' motion of the objects
Due to the Coriolis effect the wind flowing towards the Equator from high pressure belts in the subtropical regions in both the Northern and Southern Hemispheres are deflected towards the western direction because the Earth rotates on its axis towards the east
Part B
In the Northern Hemispheres, the winds are known as northeasterly trade winds and in the Southern Hemisphere, they are known as the southeasterly trade wind. Therefore, Coriolis effect has the same effect on the direction of the Trade Winds in the Southern Hemisphere as it does in the Northern Hemisphere
Explanation:
Magnetic field lines are more concentrated at the poles of the magnet
True
False
Answer:
True! UwU
Explanation:
the magnetic field is strongest near to the poles of the magnet were the lines of flux are more closely spaced.
Need an actual answer, no links.
Answer:
8.70 s
Explanation:
Given (in the y direction):
v₀ = 2.38 m/s
v = 0 m/s
a = 0.310 sin (-62.0°) m/s²
Find: t
v = at + v₀
0 m/s = (0.310 sin (-62.0°) m/s²) t + (2.38 m/s)
t = 8.70 s
An air craft heads. north at 400 km/hrs relative to the wind the air craft velocity is 300 km/hrs due north .find the velocity of the wind to the ground.
Answer:
325
Explanation
seio na:
Which statement describes a digital signal used to store information?
A. It includes sound waves you make.
B. It moves gradually among an infinite number of values.
C. It includes visible light waves.
D. It is easy to copy.
SUBMIT
Help
Answer:
D. It is easy to copy.
Explanation:
It is not B, or A, nor C.
Answer:D
Explanation:
Singly charged uranium-238 ions are accelerated through a potential difference of 2.20 kV and enter a uniform magnetic field of 1.90 T directed perpendicular to their velocities. Determine the radius of their circular path.
Answer:
r = 0.0548 m
Explanation:
Given that,
Singly charged uranium-238 ions are accelerated through a potential difference of 2.20 kV and enter a uniform magnetic field of 1.90 T directed perpendicular to their velocities.
We need to find the radius of their circular path. The formula for the radius of path is given by :
[tex]r=\dfrac{1}{B}\sqrt{\dfrac{2mV}{q}}[/tex]
m is mass of Singly charged uranium-238 ion, [tex]m=3.95\times 10^{-25}\ kg[/tex]
q is charge
So,
[tex]r=\dfrac{1}{1.9}\times \sqrt{\dfrac{2\times 3.95\times 10^{-25}\times 2.2\times 10^3}{1.6\times 10^{-19}}}\\\\r=0.0548\ m[/tex]
So, the radius of their circular path is equal to 0.0548 m.
describe what happens when light strikes a translucent material, transparent material , opaque material . give one specific example of an object that has each type of surface.
Answer: according to https://www.doe.virginia.gov When light strikes translucent materials, only some of the light passes through them. The light does not pass directly through the materials. ... Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy.
Explanation:
Please help!! I will give brainliest!
Q: Is the direction important when calculating speed? Explain.
Answer:
Depends.
Explanation:
Whether the object is going left or right, the speed will stay the same until friction eventually stops it. However, if, for example, we're talking about an object going straight before veering right, then yes, speed does matter. An object will normally have to speed up or slow down momentarily when changing direction to keep itself sustained on the ground.
So, honestly? It really depends on what we're talking about!
Hope this helped!
Source(s) used: None.
