1. Which is an advantage of coal energy?
If a wave travels 50 meters south in 3 seconds, what is the velocity of the wave? Express your answer to the nearest whole number.
_________________ meters per second
The velocity is 17 m/s South.
Answer:
17
Explanation:
A 2.0-kilogram mass is moving with a speed of 3.0 m/s. What is the kinetic energy of the mass?
Answer: 9 Joules
Explanation:
Kinetic enegry is one half the mass multiplied by the velocity squared
KE = 1/2mv^2
[tex]KE=1/2(2)(3^2)\\KE=3^2\\KE=9J[/tex]
The kinetic energy of the body is 9J
What is kinetic energy?Kinetic energy is the energy possessed by a body due to its motion.
It is claculated by formula,
K.E = [tex]\frac{1}{2}mv^{2}[/tex]
Here,
The mass of the body = 2.0kg
speed = 3.0m/s
So kinetic energy K.E = [tex]\frac{1}{2}mv^{2}[/tex]
K.E = [tex]\frac{1}{2} (2)3^{2}[/tex] = 9J
So the kinetic energy of the body is 9J
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Need help, please! : )
Explanation:
Given
force (F) = 75 N
Acceleration (a) = 5 m/s²
Mass (m) = ?
We know
F = m * a
75 = m * 5
m = 75 / 5
m = 15 kg
The mass of the shopping cart is 15 kg.
Hope it will help :)
A ball with a mass of 2.31 kilograms is rolling down a hill. What is the weight of the
ball? Write your calculation with units for all quantities. PLEASE HELP T-T
Answer:
cities grow all around
making bunches of funny sounds
Explanation:
With respect to 2D projectile motion, which of the following statements is true?
Answer:
The correct answers are
The following statements are true about an object in two-dimensional projectile motion with no air resistance
D) The speed of the object is zero at its highest point.
E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward
Explanation:
A) The speed of the object is constant but its velocity is not constant.
False the vertical velocity increases on descent
B) The acceleration of the object is constant but its object is + g when the object is rising and -g when it is falling.
False, the acceleration is -g when the object is rising
C) The acceleration of the object is zero at its highest point.
False, the acceleration is constant in magnitude throughout the motion
D) The speed of the object is zero at its highest point.
True, the direction of motion changes at the highest point from hence the body comes to rest and the speed is zero
E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward
True, the horizontal acceleration has associated force during motion but the vertical acceleration is due to gravity which is constant downwards
Explanation:
Find the acceleration of an object when the force is 850 N and the mass is 85 kg.
A. 0 m/s2
B. 7.3 x 104 m/s2
C. 0.1 m/s2
D.10 m/s2
How much does a 60 kg table weigh
Answer:
588 N
Explanation:
weigh = Mg
I hope you got that. Thanks and upovote that
If 10 crests and 10 troughs pass through a point in 5 seconds. Calculate its time period and frequency?
Answer:
frequency = 5 /s
period = 0.5 s/
Explanation:
number of revolution = 10+10/2 = 20/2 = 10
frequency = n/t = 10/5 = 5 /s
period = t/n = 5/10 = 0.5s
Please help me with physics! And provide a quick explanation. Offering 100 points and brainliest!
Answer:
I think it's b and I'm sorry if it's wrong
Two masses oscillating together with each of their time period as ,'T'
To find↷New time period ,'T'Answer↷Option B
Time period is independent of mass so it will remain same irrespective of the mass on the spring so the new time period would be the exact same as the previous one.Solution↷we know that,
The time period of a mass 'm' on a spring of spring constant 'k' can be strategize by the following equation :
[tex] \huge \rightarrow \: T \: = 2π \sqrt{ \frac{m}{k} } [/tex]
m⇢mass of the body [kg]k⇢spring constant [Nm^-1]According to the question,
The new mass would be 2mThe new spring constant would be 2kso,
The new time period would be
[tex] \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{2m}{2k} } [/tex]
[tex] \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{m}{k} } [/tex]
[tex] \huge \rightarrow \: T ' \: = T[/tex]
Hence ,option B is correct ✓
What is the size of the force acting on a copper wire with a magnetic flux density of 3.6 x 10 2 T acting at
right angles to the wire of length 19 m and current of 0.043 A? Round your answer to 2 significant
figures.
Answer:
2900 N
Explanation:
We are given;
Magnetic flux density; B = 3.6 × 10² T
Length of wire; L = 19 m
Current; I = 0.043 A
Formula for force in this regards is;
F = BIL
Where;
B is Magnetic flux density
I is current
L is length
Thus;
F = 3.6 × 10² × 0.043 × 19
F = 2941.2
To 2 significant figures gives;
F = 2900 N
How does air outside the cup affect the knetic energy of the particles in the wall and the cold water
Answer:
Air outside the cup affect the kinetic energy of the particles in the wall and the cold water by transferring its heat to the cup and cold water.
Explanation:
The air outside the cup has a high temperature as compared to that of the cold water with in the cup.
As this hot and moist air it comes in contact of cup, it transfers its heat energy and become cool itself thereby leaving water droplet on the outer side of the cup.
Due to heat imparted to the cup, the atoms with in the cup and cold water starts vibrating and hence there kinetic energy increase.
True or False: There is the same amount of water on earth today as there was when earth was formed.
Answer:
Yes the water amounts are the same.
Explanation:
A person is standing on the edge of a merry-go-round that has a radius of 2.0m is travelling at 5m/s. How long does it take for them to complete one lap?
Answer:2.51 s
Explanation:
Given
The radius of merry-go-round r=2 m
Speed of person at edge v=5 m/s
The person is in a uniform circular motion with constant velocity
time taken to complete one lap is
[tex]t=\frac{\text{distance}}{\text{speed}}=\frac{2\pi \cdot 2}{5}\\\\t=\frac{12.568}{5}=2.5136\ s[/tex]
how much work is done to move a 25 kg Mass 8 meters
Answer:
So, the power done is 196 watts.
Explanation:
PLZZZZZ I NEED HELP Which is an adaptation that helps birds maintain a stable body temperature? A. air sacs connected to lungs B.large chest muscles C.down feathers D. nearly hollow bones
Answer:
c
Explanation:
trust
Answer: I thinks it‘s the feathers
Explanation:
Bc feathers are warm and the hollow bones are to make the bird lighter so it can fly, the chest muscles don’t make heat, and the air sacs are probably for storing air
i need helppppppppppp :>
(can you make this five sentences or less
Answer:
The force of the bat is pushing harder than the ball. When there are unbalanced forces, one will move less or more than the other. Balanced forces stay the same force, that's why they're call "balanced" forces. so in this example, the bat has a stronger force than the ball, which causes the ball to have a greater reaction
tony walks at an average speed of 70 m/min from his home to his school.If the distance between his home and the school is 2100 , how much time does it take for tony to walk to school
It takes 30 minutes for Tony to get to school.
2100 divided by 70 is 30, which would represent the amount of minutes.
Also he is walking very fast to be getting 70 in a minute.
Hope this helps and have a nice day.
-R3TR0 Z3R0
The can-chiller decreases the temperature of the liquid in the can by 15 °C.
The mass of liquid is 0.33 kg.
The specific heat capacity of the liquid is 4200 J / kg °C.
Calculate the energy transferred from the liquid as it cools.
Answer:
Energy transferred, Q = 20790 J
Explanation:
Given that,
The change in temperature of the liquid, [tex]\Delta T = 15^{\circ} C[/tex]
The mass of liquid, m = 0.33 kg
The specific heat capacity of the liquid is 4200 J/kg°C.
We need to find the energy transferred from the liquid as it cools. The energy transferred is given by :
[tex]Q=mc\Delta T\\\\Q=0.33\times 4200 \times 15\\\\Q=20790\ J[/tex]
So, 20790 J of energy is transferred from the liquid as it cools.
A microwave oven has 1200 W. If it receives 120 V of potential difference, what is the current in the microwave?
Answer:
10amps
Explanation:
Given data
Power =1200W
Voltage =120V
Required
The current I
From
P=IV
I= P/V
Substitute
I=1200/120
I= 10amps
Hence the current is 10amps
Many people love roller coasters. Some people call them scream machines. They agree that riding a roller coaster is a thrilling experience. What you may not realize while you are going 60 miles an hour is that a roller coaster has no engine. You are not being propelled around the track by a motor or pulled by anything. A roller coaster moves on its own. How do you think that can happen?
HELP PLEASE!
Answer:
gravity & inertia
Explanation:
what goes up must come down & an object in motion will stay in motion until stopped
Which organ system provides structural support to other organ systems
A.Skeletal
B.Muscular
C.Nervous
D.respiratory
Answer:
A. SkeletalExplanation:
I hope it helps ❤❤
If the force of gravity was suddenly removed between the earth and sun, how would Earth move?
Group of answer choices
The sun would fly off into space.
The Earth would fly off into space in a straight line.
The Earth would fly off into space in a curved path.
The Earth would fall into the sun.
Answer:
the earthe would fly off into space in a straight line
Please help me am I correct?
Answer:
sa tingin ko tama po yung answer niyo
What moon phase is shown in the picture ?
the answer is waxing gibbous moon
Explanation:
.
Where can Microsoft users browse forums by topic, search existing questions and answers, or ask their own questions?
Group of answer choices.
A. Community and Forum Resources.
B. Get Live Help.
C. Tech Specs.
D. Top Support Issues.
Answer:
A. Community and Forum Resources.
Explanation:
Microsoft is a multinational corporation that designs and develops various types of software applications or programs such as Microsoft operating system (OS), Microsoft Word, Microsoft Excel, Microsoft Access, Microsoft PowerPoint, etc., to avail end users the ability to perform different tasks on their computers.
Whenever these users encounter a problem with any of these software applications or programs, they can easily go to the official forums and communities to get help from professionals and other end users who may have experienced such problems in the past. These community and forums are typically interactive in nature and as such serves its purpose often times.
Hence, Microsoft users can browse forums by topic, search existing questions and answers, or ask their own questions on Community and Forum Resources.
Please write in complete sentences.
How does density affect refraction?
Diamonds are a very dense material. Predict what would happen to the light ray if you projected it from the air through a diamond.
Answer:
The density of a material affects the speed that a wave will be transmitted through it. In general, the denser the transparent material, the more slowly light travels through it.
An empty container has a mass of 3 g. When it is filled with 5 cm3 of a liquid,
the total mass of container and liquid is 7 g. What is the density of the liquid, in g/cm3?
Answer:
THE MASS OF THE LIQUID IS 22.5 g
Explanation:
Density = 0.180 g/cm3
Side length = 5 cm
Mass = unknown
To calculate the mass of the liquid, we use the formula:
Mass = density * volume
Volume of a cube or cuboid container = l^3
Volume = 5 ^3 = 125 cm3
So therefore, the mass of the liquid is:
Mass = 0.180 * 125
Mass = 22.5 g
In conclusion, the mass of the liquid in the container is 22.5 g
what is the kinetic energy of an object with a mass of 80 kg and velocity of 12 m/s east?
Answer:
KE = 1296 J
Explanation:
Milltown is 15ºC (59ºF) in the spring. What is the source for most of the energy that causes this temperature?
Answer:
The sun
Explanation:
The sun
The source for most of the energy that causes this temperature in Milltown with temperature 15ºC (59ºF) is the sun.
The Sun which is a star at the center of the Solar System carried some great amount of energy which is radiating the energy mainly as visible light, ultraviolet light, and infrared radiation.
Therefore, sun is responsible for temperature in Milltown with temperature 15ºC .
Learn more about sun at;
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