Answer:
B.) a wheel and axle and a lever
Explanation:
P.S - The exact question is -
Given - A wheelbarrow can be used to help lift a load, such as a pile of dirt, and then push the load across a distance. A man pushes a wheelbarrow.
To find - Which simple machines make up a wheelbarrow?
A.) a pulley and an inclined plane
B.) a wheel and axle and a lever
C.) a pulley and a wheel and axle
D.) a lever and a wedge
Proof -
The correct option is - B.) a wheel and axle and a lever
Wheelbarrows are used to carry more goods from place to place by using minimal force as compared when goods are carried by hand.
With this machine, During hauling people can save time.
Answer:
B.) a wheel and axle and a lever
Explanation:
LITERALLY HELP IMBEGGING YOU GUYS ANYONE IM NEEED HELP
Explanation:
The energy of a photon is given by :
[tex]E=\dfrac{hc}{\lambda}[/tex]
Where
h is Planck's constant
c is the speed of light
[tex]\lambda[/tex] is wavelength
or
[tex]E=hf[/tex], f is the frequency
Energy is directly proportional to the frequency of an object.
The energy transported by a wave is directly proportional to the square of the amplitude.
A bowling ball with 218 J of kinetic energy is moving at 8.0 m/s. What is the mass of the bowling ball?
What do scientists use satellites for?
(there is no science colum)
Answer:
NASA satellites help scientists study Earth and space. Satellites looking toward Earth provide information about clouds, oceans, land and ice. They also measure gases in the atmosphere, such as ozone and carbon dioxide, and the amount of energy that Earth absorbs and emits. And satellites monitor wildfires, volcanoes and their smoke.
Explanation:
Hope this helps! :) have a great day.
1. GPS
2. Internet
3. Weather forecast
4. Observation
5. Experiments
6. Discovery
In the process of photosynthesis, how do plants obtain the water, carbon dioxide, and energy they use for this process?
Answer:
They get it from the air and soil. They also take energy from the sun.
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.
How much force required to prevent a book from falling if the mass of the book is 50 grams?
Answer:
The gravitational force on a mass is its weight. We can write this in vector form, where
→
w
is weight and m is mass, as
→
w
=
m
→
g
.
In scalar form, we can write
w
=
m
g
.
Since
g
=
9.80
m/s
2
on Earth, the weight of a 1.00-kg object on Earth is 9.80 N:
w
=
m
g
=
(
1.00
kg
)
(
9.80
m/s
2
)
=
9.80
N
Explanation:
This parallel circuit has three resistors R1-120 ohm; R2-45 ohm: R3=360
ohm and a power source of 240 volts.. Find the total resistance of the
circuit.
O 2.491 ohm
O 1.382 ohm
O 0.582 ohm
O 0.033 ohm
Answer:
the answer is 30 Ohms. Not found in the options provided
Find the Y component of 35m/s at 57 degrees from the X-axis.
Answer:
35m/s[57o].
X = 35*Cos57 =
Y = 35*sin7 =Explanation:
learn man but there u go
The Y component of the velocity 35 m/s is 29.35 m/s.
What is a projectile?A projectile can be defined as an object upon which experiences only force is gravity. The projectile covers the path with a parabolic trajectory because of the effect of gravity. No horizontal forces act upon projectiles which causes no horizontal acceleration.
The velocity of a projectile is divided into two components one is the horizontal component and the other is the vertical component.
If the projectile makes an angle θ with the X- axis.
The vertical component of the velocity, Vy = Vsinθ
The horizontal component of the velocity, Vx = Vcosθ
Given the angle θ with the X- axis = 57°
The velocity of the projectile V = 35 m/s
Then the vertical or Y component of the velocity, Vy = Vsinθ =
Y component = 35× sin 57°
Vy = 29.35 m/s
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what is th resistance force when you walk up an inclined plane?
Explanation:
Friction is a force that offers resistance to movement when one object is in contact with another
Answer:
Friction is a force.
Explanation:
Have a wonderful day.
Given equal time periods, which statement about radioactive waste is correct?
A. Radioactive decay and nuclear fission always generate the same amount of waste.
B. Nuclear fusion generates less radioactive waste than radioactive decay does.
C. Nuclear fusion generates less radioactive waste than nuclear fission does.
D. Nuclear fission generates less radioactive waste than radioactive decay does.
A magnet can generate an electric current in a wire if the magnet is close enough to the wire and if the magnet is also
A.)strong
B.)weak.
C.)at rest.
D.)in motion.
Answer:a stro
Explanation:
A magnet can generate an electric current in a wire if the magnet is close enough to the wire and if the magnet is also in motion. The correct answer is D) in motion.
What is electromagnetic induction?When a magnetic field is in motion with respect to a conductor, such as a wire, it induces an electric current in the wire. This is because the changing magnetic field creates a changing electric field around the wire, which causes electrons to flow. The induced electric current is proportional to the rate of change of the magnetic field. This consequence is known as electromagnetic induction.
The strength of the magnetic field does affect the magnitude of the induced electric current, but the magnetic field must be in motion in order to generate an electric current.
A weak magnetic field can still generate an electric current in a wire if it is in motion with respect to the wire.
If a magnetic field is at rest, it will not induce an electric current in a wire. The magnetic field must be in motion in order to generate an electric current.
Thus, the correct answer is D) in motion.
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I Need Help, Thank you! ^^ <3
How can global warming lead to changes to the Earth’s surface?
a.
Global warming can lead to an increased number of earthquakes, which change the Earth’s surface.
b.
Global warming can lead to glaciers melting, causing flooding to areas and the decrease of glacial land masses.
c.
Global warming leads to a decrease in water levels of coastal wetlands.
d.
Global warming cannot lead to changes to the Earth’s surface.
Please select the best answer from the choices provided
A
B
C
D
Answer:
A
Explanation:
But global warming will have additional, far-reaching effects on the planet. Warming modifies rainfall patterns, amplifies coastal erosion, lengthens the growing season in some regions, melts ice caps and glaciers, and alters the ranges of some infectious diseases.
Answer:
I think it is B since Global warming can lead to glaciers melting and cause flooding since the water will get warmer resulting in the ocean rising, which causes flooding
Explanation:
Which changes in surface water movement are likely
to occur when vegetation is removed from the side of
a hill?
A) infiltration decreases and runoff decreases
B) infiltration decreases and runoff increases
C) infiltration increases and runoff decreases
D) infiltration increases and runoff increases
Answer:
infiltration decreases and runoff increase
Explanation:
The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.
What is surface overflow?Surface overflow is the flow of water which take place on the surface of the ground. The extra water due to rain or flood arises on the ground or at the surface, flows in the nearby lacks or ponds.
Now if the vegetation is removed, great amount of water started to come from the hills. The result of it, more water started to overflow on the land of the surface. This way the runoff increases.
Infiltration is the way by which the ground level water enters into the soil of the earth.
Now, if the vegetation is removed, a lot of amounts of water started to come from the hills. This excess amount of water does not enter in to the soil of the earth.
The changes in surface water movement which is likely to occur when vegetation is removed from the side of a hill is infiltration decreases and runoff increases.
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Explain how energy that comes from the outside of the Earth system drives the flow of water on surface currents.
Answer:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
Explanation:
The ocean and atmosphere are connected. They work together to move heat and fresh water across the globe. Wind-driven and ocean-current circulations move warm water toward the poles and colder water toward the equator. ... The majority of the thermal energy at the Earth's surface is stored in the ocean.
As distance increases, gravitational force________
Answer:
Decreases
Explanation:
Answer:
Decreases
ExplanatIon:
True or false? In a linear relationship, a change in one variable will always result in a change of the
same size in the other variable.
The statement 'in a linear relationship, a change in one variable will always result in a change of the same size in the other variable' is FALSE.
What is a linear relationship?A linear relationship is a type of association between two variables where a change in one produces a direct modification in the another one.
A linear relationship may change depending on the rate of change and therefore the size of this variation is not the same.
In conclusion, the statement 'in a linear relationship, a change in one variable will always result in a change of the same size in the other variable' is FALSE.
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Can someone help me with this science one please
A positive charge moving with a constant velocity v enters a region
of a uniform magnetic field pointing to the top of the page. What
is the direction of the magnetic force on the charge?
A. Left.
B. Right.
C. To the bottom of the page.
D. To the t&p of the page.
E. There is no magnetic force on the charge.
What is the momentum of a 4 kg object moving west at 4 m/s?*
O 12 kg*m/s (east)
O 1.33 kg*m/s (west)
O 16 kg*m/s (east)
16 kg*m/s (west)
Answer:
16kg*m/s west
Explanation:
P=M*V
Momentum= Mass time velocity, plug it into the formula,
M is 4 and V is 4, 4*4=16, and since the object is moving west its going to be west.
basically saying in simpler terms,
16=4*4
Gamma ray technology can be used to do which of the following?
A. Monitor human activity at night
B. Treat tumors in the body
C. Speed up the process of hardening paint
D. Communicate across long distances
Answer:
b
Explanation:
radiation can treat tumors.
Answer:
B. Treat tumors in the body
Explanation:
took quiz
Julio has a green plant on his bedroom window sill. This summer Julio and his family will be traveling. No one will be home for month. Which is julio most likely to find when he returns home from his trip
Answer:
Explanation:
A withered plant. Unless the plant is one of the many plants that have huge water retention capacity, for example, cactus. Such plants also don't need water to gr6, they just need a tiny amount of water, ba sufficient sunlight to enable them complete photosynthesis.
Any other plants asides one of the many like that, he will definitely come back to a dead, or at best, withered plant. A month is too long a time to not take care of your plant and expect it to still be up and running
A 10cm3 sample of copper has a density of 897g/cm3. What is the mass of the sample?
A 10cm³ sample of copper has a density of 897g/cm³. What is the mass of the sample ?
Answer:-Given:-Density of sample of copper is 897g/cm³.
Volume of sample of copper is 10cm³.
To Find:-The mass of the sample.
Solution:-We know,
[tex] { \boxed{\bf{\rm \red {Mass \: = \: Density \: × \: Volume}}}} [/tex]
So, Mass = 897g/cm³ × 10cm³
Mass = 8970 g
The mass of the sample is 8970 g. [Answer]After rubbing a rubber brush on wool, Gilbert is able to use the brush to pick up small strips of paper. What causes the paper to be attracted to the brush?
A.) gravity
B.)electric current
C.) static electricity
D.)magnetism
After rubbing the a rubber brush on the wool it gets a charge acquired by the passage of electrons. The electrons from the wools escapes to the brush and thus the paper get attracted to electrons in the brush. Hence, option B is correct.
What is electric current?Electric current is the passage of electrons from the negative end to positive end of a potential difference.
When a an object is rubbed on a conducting material it gets some electrons into it. When this material comes in contact with another object which have random distribution of charges will attracts the electrons by its positive end.
The rubber brush gets negatively charged on rubbing. Paper have positive and negative charges in random. When it comes in contact with the negatively charged brush the electrons in the paper repelled away.
The positive charges thus accumulates on the other end of the paper and attracted to the brush. This is an example of static current. Hence option B is correct.
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A load uses a current of 5.0 A when it is attached to a 20 V source. What is the resistance of the load?
Answer: 4.0 ohm
Explanation:
what is the line that joins northen and southren hemisphere of the earth is called a
The line is called equator.
How was our galaxy formed?
Answer:
according to big bang theory our galaxy was formed 13billion years ago and then made the stars and galaxies we see today. ... The universe began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a "singularity).
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answer:
mechanic and potential?
Explanation:
How many cups of water should you drink in a day?
Answer:
about 2.7liters for women and 3.7liters for men
Explanation:
Lee knew that certain events occur to create new material in the process of sea-floor spreading. Rearrange the steps into the correct order by placing the event that happens first at the top. Place the event that occurs last at the bottom.
Answer:
Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other. ... As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.
Explanation:
did this help???
The correct order for in a breach in the Earth's crust, molten material pours upward is (2), (3) and (4).
What is the earth's crust?The Earth's Crust is the planet's outermost layer. The Crust is a portion of the lithosphere that lies above the mantle and comprises tectonic plates that provide a platform for all land on Earth.
We have:
Lee knew that certain events occur to create new material in the process of sea-floor spreading.
The correct order for in a breach in the Earth's crust, molten material pours upward:
The molten material hardens into solid strips of rock on both sides of the crack.The ocean floor on both sides of the crack moves farther away from the mid-ocean ridge.The ocean floor gradually becomes wider.Thus, the correct order for in a breach in the Earth's crust, molten material pours upward is (2), (3) and (4).
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GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-
Answer:
A, and D are the answers
Explanation:
The pulley. It is located where the bicycle chain and gears are. The chain is wrapped around the pulley which turns and causes the wheel to turn on its axle.
How are radio waves modified to send information?
Answer:
Radio waves can be modified by their amplitude or frequency in order to transmit sound or data.
Explanation:
Hope this helped!!!