Answers
UVI(Ultraviolet Index) is a scale to measure harmful UV radiations coming from the sun.
Related Questions
Human sense impressions are subjective and qualitative
making them difficult to record or compare.
TRUE
FALSE
Answers
Answer:trueee
Explanation:
calculate the power used by a 40kg man if he climbs a 6m tall ladder in 15 seconds
Answers
Answer:
(i)
Force of gravity acting on the boy = mg
= 40 * 10
= 400 N
(ii)
Work done by him = mgh
= 40 * 10 * 0.08
= 32 J
(iii)
Power = Work / Time
= 32 / 5
= 6.4 Watt
Explanation:
hope this helps
which of the following terms or pair of terms is used to describe how energy flows in a chemical reaction?
A.Conservation of matter
B.Chemical Equation
C.Reactants and products
D.Exothermic and Endothermic
Answers
Answer:
D Exothermic and Endothermic
Explanation:
Answer:
D
Explanation:
I just took test
How can circular motion be accelerated when speed is constant?
A. Because of the accelerator pedal in the vehicle
B. Because Newton said
C. Because direction changes
D. Because the vehicle has circular wheels
Answers
Answer:
Correct answer is C: Because direction changes.
Explanation:
Hope you have a wonderful weekend.
The specific heat capacity of copper is 390 J/Kg AC. What does this
mean?
Answers
Answer:
It means that 400 J of heat is the required amount to raise or lower thh temperature of a 1kg piece of copper
Explanation:
390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C
From the given information,
The specific heat capacity of copper is 390 J/Kg °C. To determine what this means, we will define the term specific heat capacity.
The specific heat capacity of a substance is the amount of energy required to raise the temperature of 1 kg of the substance by 1 °C.
Therefore, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.
Hence, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.
Learn more here: https://brainly.com/question/20879870
1. Hearing is also known as
?
Answers
2. Which of the following wavelength properties would require a stopwatch to measure?
A wavelength
B amplitud
C frequency
D height
Answers
Answer:
A. wavelength
Explanation:
The others are about sound and how high it is. That has nothing to do with time.
Question : Which of the following wavelength properties would require a stopwatch to measure ?
A - wavelength
B- amplitude
C- frequency
D- height
MY ANSWER : C- FREQUENCY
MWAHHH LOVE - HAVE A RESTFUL NIGHT !
Engineers at the Space Centre must determine the net force needed for a rockets engine to achieve an acceleration of 70 m/s2. Assume the rocket is in outer space with no gravitational or other forces acting on it. If the mass of the rocket is 45 000 kg, what force is required to be produced by the rocket engines?
Answers
Answer:
3,150,000N
Explanation:
According to Newton's second law;
F = mass * acceleration
Given
Mass = 45000kg
acceleration = 70m/s^2
Substitute
F = 45000 * 70
F = 3,150,000N
Hence the force required to be produced by the rocket engines is 3,150,000N
Answer:
3,150,000 Newtons
Explanation:
F=M*A
F=45,000kg times (*) 70 m/s squared
F=3,150,000N (newtons)
The speed of a wave is 70 m/s. If the wavelength of the wave is 0.4
meters, what is the frequency of the wave?
Answers
Answer:
dont know still in 7gd
Explanation:
Answer:
Leo no i dont ansver
Explanation:
ezgisu0613062011 http ()/_
40 Newtons
30 Newtons
20 Newtons
10 Newtons
Which statement is TRUE about the picture above?
A
The spheres have only weight but no mass.
B
The 40 Newton sphere has the greatest gravitational force.
The smaller the weight, the greater the gravitational force
D
Although the weights of the spheres are different, the gravitational forces
are the same
Sign out
04:04
Answers
Help please
Which occurrence would lead you to conclude that lights are connected in a
combined circuit?
A. When one bulb burns out all the lights go out.
B. When one bulb burns out, a circuit breaker is tripped.
C. When one bulb burns out a small section of lights goes out.
D. When one bulb burns out all the other lights stay lit.
Answers
Answer:
D
Explanation:
as one burns then all stop simple
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a ball of mass 1kg is being suspended 10m above the ground & is then dropped. what is the balls kinetic energy just before it hits that ground ?
a. 10 J
b. 98 J
c. 50 J
d. 0 J
Answers
Answer:
E = 98 J
Explanation:
Given that,
The mass of a ball, m = 1 kg
It is being suspended 10m above the ground & is then dropped.
We need to find the ball's kinetic energy just before it hits that ground. The conservation of energy holds here. It means, the kinetic energy just before it hits that ground is equal to its potential energy i.e.
[tex]E=mgh\\\\E=1\times 10\times 9.8\\\\E=98\ J[/tex]
so, the required energy is 98 J. Hence, the correct option is (b) "98 J".
ILL GIVE BRAINLYyYYYyYYyyyyy
The best thermal insulators _____________________.
have free electrons.
are metals.
conduct heat well.
are gases.
Answers
Answer:
The best thermal insulators have free electrons
WILL GIVE BRAINLIEST
Answers
The first, fourth, and fifth answers are correct.
What are the two forces that are acting on the skydiver? What is
the relationship between these two forces? Explain.
Answers
Answer:
Gravity provides a downward force, resulting in the diver going downward. They speed up like any falling object would, the pull of gravity is a dominant force. (There is a drag force – as a result of moving through the air.)
Find the force on an object which has a mass of 20 kg and an acceleration of 10 m/s2.
Answers
Answer:
200N
Explanation:
mass = 20 kg
acceleration = 10 m/s^2
Force = mass * acceleration
= 20 *10
= 200 N
Isotopes _____ at very different rates.
Answers
Answer:
i think its decay?
Explanation:
PLEASE HURRYYYy THIS IS DUE IN 5 minutes!!!!!!
Find the momentum of a 3.0kg mass when it is stopped.
Answers
Answer:
there is no momentum
Explanation:
1. What do the elements Sulfur (S), Nitrogen (N), Phosphorous (P), and Bromine (Br) all have in
common?
Answers
3. Explain what the law of conservation of momen-
tum means, and give example.
Answers
Answer:
The law of momentum means
Explanation:
What type of system would allow light to enter and exit, but would keep any
additional atoms out?
Answers
Answer: it’s closed
Explanation: a pex
3. Which of the following has more inertia?
b. Hammer
DI
Feather
Answers
Answer:
The Feather.
Explanation:
Inertia depends on the mass of an object.
Two examples of inventions that increase friction?
Answers
Answer:
My hard pp...............
Explanation:
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions. Online Content: Site 1 Online Content: Site 2 How is coal formed and why is it considered a nonrenewable resource? (Site 1)
Answers
Answer:
Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy
Explanation:
Coal is formed from the fossil fuel that lie deep beneath the earth crust . These fossil fuels are dead remains of living organism that burried beneath the earth crust million of years ago.
Coal is non renewable because if once it gets depleted it will take a very very long time to replenish.
Answer: Coal is fossil fuel extracted from earth and since it takes a long time to replenish, it is called a non renewable source of energy
Explanation: just did it
A- Lunar Eclipse
B- Neap Tide
C- Spring tide
D-Solar tide
Answers
D Solar tide
Explanation:
Because d is closer to the sun
The photo shows a toy spring. What kind of energy does the toy have because of its shape?
Answers
Answer:
elastic
Explanation:
if you stretch it it will go back to its shape, and also it is the only one that makes sense.
Answer:
Elastic
Explanation:
I got it right
What equations would you use to find force?
Answers
Answer:
F = m x a
Explanation:
F = force
m = mass of an object
a = acceleration
if you already have the time which is 4s and the initial velocity which is 9.8m/s and the acceleration which is -9.8m/s/s. what would the dispacement be?
Answers
Answer:10
Explanation:
2+2=10
Answer:
10
Explanation:
2+8=10
6+4=10
5+5=10
7+3=10
9+1=10
3+2+4+1=10
Substance A has twice the specific heat capacity as substance B. If 1000 J of heat are added to 1.0 kg of each substance, compare the change in temperature of each substance.
Answers
Q=mc x delta T
Q= heat energy in Joules
m= mass of substance heated or cooled
c= specific heat
ΔT is change in temp.
Solve for change in temp=. Q/mc
Specific heat and mass are not inversely proportional to heat energy input.
Putting into real world scenario of using water to heat a building.
Specific heat of water is 1.
It takes 1 btu to raise one pound of water 1 degF. at a base of 60 degF
Acetone specific heat is .51
So it takes half the amount of heat input to get a 100 degree ΔT, as compared to water.
The musical tone a piano has a frequency of 346HZ and a wavelength of 1.3 M what is the speed of the sound
Answers
Answer:
v= 449.8 m/s
Explanation:
Given data
Frequency= 346Hz
Wave length= 1.4m
The expression below is used to find the speed
[tex]v= f \lambda\\\\[/tex]
substitute
[tex]v= 346*1.3\\\\v= 449.8 m/s[/tex]
Hence the speed is v= 449.8 m/s