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
Please help
Convert the following distance v time graph velocity graph
Explanation:
for v vs t graph for t=9 to 11,v=15kmph
similarly v2=0,v3=60kmph&v4= -40kmph
How much work is done when a 5 N force moves a block 4 m?
All objects in the universe are attracted to each other by the force of. A. effort
B. friction
C. inertia
D. gravity*
Answer:
It encapsulates the idea that all the particles of matter in the universe attract each other through the force of gravity – Newton's law tells us how strong that attraction is. ...
Explanation:
your answer
Answer:
So, I noticed that somebody rated the other answer here 1 star. But, if you really can't get it, (which doesn't make sense because the answer is literally in it) the answer is gravity. Which would make the answer D. gravity
Explanation:
A force of 162 N is applied to an object causing it to accelerate at a rate of 3.8 m/s^2. What is its mass?
A. 0.2 kg
B. 616 kg
C. 43 kg
D. 102 kg
Answer:
43 kg
Explanation:
Force (F) = 162 N
acceleration (a) = 3.8 m/s²
mass (m) = ?
We know
F = m * a
162 = m * 3.8
m = 162 / 3.8
m = 43 kg
It's mass is 43 kg.
Hope it will help you :)
Which of the following objects has no kinetic energy?
A picture on a wall
A waterfall
A ball flying through the air
A hockey puck sliding across the ice
Answer:
a picture on a wall. because it's not moving
The musical tone a piano has a frequency of 346HZ and a wavelength of 1.3 M what is the speed of the sound
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
what moon phase will occur about 14 days after a first quarter?
Answer:
waxing gibbous is the answer.
Copper has the has a property of becoming a permanent magnet True False
Answer:
False
Explanation:
If you have a strong enough magnetic field all matter is magnetic. But copper is so weakly magnetic that we can't observe it without very, very large magnetic fields. So the short answer is "No, copper isn't magnetic." This can quickly be tested by trying to pick up a penny with a magnet.
BRAINLIST PLS!
How much does a 60 kg table weigh
Answer:
588 N
Explanation:
weigh = Mg
I hope you got that. Thanks and upovote that
3. Atoms with the same number of protons and electrons are neutral, and their charges add up to
a) zero
b) one
c) ten
Answer:
a) zero.
Explanation:
If the charge of an atom is neutral, then that means it has neither a negative charge nor a positive charge. So, it would have a charge of 0.
Hope this helps!
Which statement best describes twins with identical DNA?
O A. The twins will not be similar physically but may have similar behaviors.
OB. The twins will not share any similarities.
c. The twins will be identical physically and behaviorally.
D. The twins will be very similar physically but will have some unique behaviors.
The best description of twins with identical DNA is that the twins will be identical physically and behaviorally. Thus, the correct option is C.
What are the identical DNA twins?Identical twins are also called as the monozygotic twins which result from the fertilization of a single egg by a single sperm, or with the fertilized egg which are then splitting into two individual offspring. Identical twins share the same genomes and are also of the same sex.
Identical twins are also called as monozygotic twins, these result from the fertilization of a single egg by a single sperm, with the fertilized egg which then splitting into two identical cells. Identical twins share the same genomes and are always of the same sex.
Therefore, the correct option is C.
Learn more about DNA here:
https://brainly.com/question/21668095
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I really need help please ASAP
if wave A has three times the amplitude of wave B, then wave A will have nine times the energy as wave B
TRUE OR FALSE?
30 POINTS
Answer:
true
Explanation:
Answer:
True
Explanation:
I finished the test not too long ago. Lol.
A neutron star is moving in outer space at 4,000 km/hr. What happened to the star that set it in motion on it's current course?
a
the friction in space slowed it down to 4,000 km/hr
b
an unbalanced force from a supernova set it in motion
c
it was shot further into space due to the velocity of objects around it
d
a balanced force acted on it and propelled it to 4,000 km/hr
Answer:
d
a balanced force acted on it and propelled it to 4,000 km/hr
Explanation:
For the neutrons star which is moving in outer space at 4,000 km/hr, it could only be possible as a result of the balanced force which had already acted on it. This is based on newton's law of motion which states that 'To every action, there is equal and opposite reaction'.
A hockey ball accelerates from 0 m/s to 25 m/s in 0.05 seconds. What is the acceleration of the ball?
Answer:
500
Explanation:
25/0.05
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
Pls help me I need help thanks.
Answer: The Answer Is A
Explanation:
HURYY PLEASE
The processes that transform inputs to outputs are what part of a system?
the components
the surroundings
the flow
the boundary
A boy of mass, m weights 895 N. What is his mass, m?
Answer:
91.3 kg
Explanation:
weight = m*g
m: mass
g: gravity = 9.8 or 10 (depends on what your instructor tells you to use)
mass = w/g
895/9.8 = 91.3 KG
Organ systems are groups of organs that do not carry out similar
functions
True
False
Answer:
False.....................................
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
Sankey Diagrams
LED light
What is the efficiency of this LED light?
10%
20%
80%
100%
Feedback?
Answer:i think 10
Explanation:
Khaled said the North star is special because it appears all over the world and its changes position.
a. false
b.true
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
To know more about kinetic energy here
https://brainly.com/question/26405082
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The acceleration due to gravity on the moon is 1.6 2. If an astronaut weighs 96 N on
the moon, what is the astronaut's mass on Earth? (2 points)
Answer:
60kg
Explanation:
F= ma
96 = m ×1.6
m= 96/1.6
=60 kg
my gosh im in fifth grade and need an answer stat dude what causes lightning
A. build up of electrical charges in the clouds
B. flow of electrical charges among clouds
C. light energy created in the clouds
D. reflection of light in the clouds
Answer:
it's either A or B because lighting is an electrical discharge caused by imbalance between storm clouds and the ground
Explanation:
pretty sure it's A though
ill give brainliest,
Nascar fans love race day when they get a chance to pull for their favorite drive. If a driver was able to travel 600 miles in 3 hours, what was his/her average speed?
What moon phase is shown in the picture ?
the answer is waxing gibbous moon
Explanation:
.
A marble on a frictionless track, starting from point A in the drawing, is projected down the curved runway. (This means that the initial speed of the particle is NOT zero!) Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height of 5.00 m above the floor before falling back down. Ignoring air resistance, find the initial speed of the particle (v0) at point A.
Answer:
v = 4.4 m / s
Explanation:
Unfortunately, the exercise scheme does not appear. Let's analyze the problem the marble leaves point A with an initial velocity, goes down and then rises to a given height where its velocity is zero, in the whole trajectory they tell us that the resistance is zero, so we can use the conservation relations of the enegy.
Starting point. Point A
Em₀ = K + U = ½ m v2 + mg y_a
point B.
Em_f = U = m g y
the energy is conserved
Em₀ = Em_f
½ m v² + mg y_a = m g y
½ m v² = m g (y -y_a)
v = [tex]\sqrt {2g ( y - y_a)}[/tex]
In the exercise the diagram is not seen, but the height of point A must be known, suppose that y_a = 4 m
v = [tex]\sqrt{ 2 \ 9.8 ( 5 -4)}[/tex]
v = 4.4 m / s