Answer:
Compounds
Explanation:
A planet is orbiting its star at a maximum radius of 1.2 x 10^7 meters. If the mass of the star is 2 x 10^30 kg, what is the time period of the orbit?
22.6 seconds
A. 80 seconds
B. 22.6 days
C.80 days
D.22.6 minutes
A 0.85 kg soccer ball is booted straight up in the air. If it left the soccer player's foot at a height of 1.0 m and reaches a height of 47.0 m, what was its kinetic energy immediately after it was kicked?
Answer:
383 J
Explanation:
m = 0.85 kg, h = 1.0 m, H = 47.0 m
Find KE at h
At h, total energy = KE + mgh
At H, KE = 0, total energy = mgH
Energy conservation:
KE + mgh = mgH
so KE = mgH - mgh = mg(H - h) = 0.85*9.8*(47.0-1.0) = 383 J
Predict the energy transformation that occurs when carson sands a piece of wood with sandpaper.
Answer:
Explanation:
The hand provides Kinetic Energy in moving.
The KE is transformed to Frictional energy
The Frictional Energy can produce heat and light energy.
The sandpaper produces little shreds from the grit of the paper.
The shreds have KE (they move)
a stone on ground has zero energy
Answer:
Since energy means capacity to do work, when stone is in ground level, it has 0 work because it doesn't covered any distance but when stone lifted at a certain height , it covered a certain distance and work is done. Thus same stone has energy when it is lifted at a height .
Explanation:
8. Lee is rolling along her 4.0-kg skateboard with a constant speed of 3.0 m/s when she jumps off the back and continues forward with a velocity of 2.0 m/s relative to the ground. This causes the skateboard to go flying forward with a speed of 15.5 m/s relative to the ground. What is Lee's mass?
From the principle of conservation of linear momentum, the mass of Lee is 50 Kg.
What is momentum?Momentum is the product of mass and velocity. The principle of conservation of linear momentum states that the total momentum before collision is equal to the total momentum after collision.
Let the mass of Lee be m
Hence;
(4.0-kg × 3.0 m/s) + (m × 3.0 m/s) = (4.0-kg × 15.5 m/s) + (m × 2.0 m/s)
12 + 3m = 62 + 2m
12 - 62 = 2m - 3m
-50 = -m
m = 50 Kg
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Explain why the teenager and the wheelchair don't have the same kinetic energy, even though they have the same speed
Answer:
their weight difference
Explanation:
weight adds to kinetic energy. a heavier object will have a higher kinetic energy because the extra weight will slowly increase or decrease the velocity depending on if it's being sent down a decline or inclined plane
Help!!!!!!!!!!!!!!!!!
Answer:
(4) Elastomers
Explanation:
Substances which can be elastically stretched to large value of strain are called elastomers.
What happens during nuclear fission?
Answer:
Atoms are split apart, and they release energy
Explanation:
sry if I'm wrong
19) A navy cargo plane drops drops bundles of shelters and mosquito nets onto a field in rural
Kenya. It is moving with a constant horizontal speed at an elevated height. Assuming that air
resistance is negligible, where will the packages land relative to the plane?
A) directly below the plane
B) below the plane and behind it.
C) below the plane and ahead of it
D) below the plane and both behind and ahead of it
Answer:
B) below the plane and behind it.
Help immediately! Answer I need help.
Answer:
0.80 m
Explanation:
elastic potential energy formula
elastic potential energy = 0.5 × spring constant × (extension) 2
Most scientists, inventors and engineers do not come up with their ideas all on their own but rather
build upon the ideas or inventions of others. Name two scientists/inventors/engineers in the field of
electricity that obviously used ideas from other people to advance their own ideas and/or inventions,
Include the people from whom they 'borrowed their ideas,
Answer:
Benjamin Franklin, Thomas Edison
and Robert Anderson, Thomas Davenport
Explanation:
Edison was Franklin's idol in studying electricity (Edison's electric light bulb, and Franklin's metal key string kite static experiment)
Anderson and Davenport for the first electric car
Consider a bowling ball and a soccer ball on a flat surface.
What would best describe the movement of the two balls if both were pushed with the same force?
Answer:
The Soccer ball would travel the furthest then the bowling ball
Explanation:
The Soccer ball would travel the furthest then the bowling ball because heavier objects require more force. This example can be compared with us pushing a huge rock vs us pushing a small rock, of you thing about it the small rock moves easily then the huge rock and this is due to their difference in their mass.
. What spins the turbine and generates electricity in a light water reactor?
Answer:
Inside the reactor vessel, the fuel rods are immersed in water which acts as both a coolant and moderator. ... The heat created by fission turns the water into steam, which spins a turbine to produce carbon-free electricity.As mass increases, what happens to the gravitational force? A. It increases. B. It decreases. C. It stays the same. D. It acts as a 3rd degree derivative function
Answer:
A
Explanation:
Because based on newton's law of universal gravitation
*since the gravitational force is directly proportional to the mass.so the mass of object increases,the force of gravitational attraction also increases.
The most common battery cable terminal is a ________ that provides a large surface contact area with the ability to tighten the terminal onto the battery post using a nut and bolt.
Why I’d it important to define a frame of reference?
Answer:
so two people can understand each other when presenting new ideas to each other
Explanation:
Answer:
Motion must be defined relative to something.
Explanation:
Basically, the motion of an object will vary according to the observer. And because motion is independent of the frame of reference, the frame of reference must be defined. I hope that makes sense. :)
A student puts a piece of ice into a beaker of cold water. Which two statements are true. Please help
Answer:
A. Thermal energy will move from the water to the ice.
B. Thermal energy will move from air to the water.
C. Thermal energy will move from the ice to the air.
D. Thermal energy will move from the water to the air.
A and B are correct
Explanation:
Because thermal energy will move from the water to the ice
what is relavite velocity?
Answer:
The relative velocity {\displaystyle {\vec {v}}_{B\mid A}} is the velocity of an object or observer B in the rest frame of another object or observer A.
Answer:
The relative velocity is defined as the velocity of an object with respect to another observer. It is the time rate of change of relative position of one object with respect to another object.
a horseshoe magnet is a type of magnet true or false?
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A wooden block measuring 50 cm by 100 cm by 200 cm has a mass of 8000 g.
The density of the block is mathematically given as
[tex]\phi=8e-4[/tex]
Whats the Density of block?Question Parameters:
50 cm by 100 cm by 200 cm has a mass of 8000 g.
Density is simply defined as the mass per unit volume of a material or substance
where
Volume and Mass are factors of density
Generally the equation for the density is mathematically given as
[tex]phi=\frac{m}{v}[/tex]
Where
v= 50 cm * 100 cm * 200 cm
v=1000000cm
v=10000m
Therefore
[tex]phi=\frac{m}{v}\\\\phi=\frac{8}{10000}[/tex]
phi=8e-4
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A cylinder of lead has a diameter of 3 centimeters and a height of 8 centimeters. The density of lead is 11.4 g/cm3. What is the mass of the cylinder
Answer:
m = 644.67
Explanation:
m = v x d
m = pi x r^2 x h x d
m = 56.55 x 11.4
The mass of the cylinder with diameter and height of 3 cm and 8 cm respectively is 644.3 grams.
Which term is equivalent to product of density and volume?The product of density and volume of a body represents its mass. Mathematically -
M = V x ρ
ρ - density
M - mass
V - volume
Given is a cylinder of lead that has a diameter of 3cm and a height of 8 cm. The density of lead is 11.4 g/cm3.
The product of density and volume of a body represents its mass
M = V x ρ
Volume of cylinder = πr²h
Therefore, we can write -
M = πr²h x ρ
M = 3.14 x 3/2 x 3/2 x 8 x 11.4
M = 56.52 x 11.4
M = 644.3 grams
Therefore, the mass of the cylinder with diameter and height of 3 cm and 8 cm respectively is 644.3 grams.
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An alpha particle is made up of __ __and
ions
protons
neutrons
C electrons
help pls lol and tysm
Answer:
umm section 2 and 4
Explanation:
because at section 2 it starts and at section 4 it moves again and stops at 3.
A 5.00 kilogram block is pulled 2.0 meters along a
horizontal, frictionless surface using a force of 100
newtons at an angle of 20.0° above horizontal as shown
in the diagram below. Determine the amount of work done in the block as it is moved
Answer:
188 J
Explanation:
W = F * d * cosα
Now F = 100 N, d = 2.0 m, α = 20.0°
so
W = 100 * 2.0 * cos(20) = 188 J
the diagram shows 4 identical ball bearings, placed between 2 blocks on a steel ruler. Calculate the diameter of one ball bearing
Answer:
[tex]2 \: cm[/tex]
Explanation:
Total diameter:
[tex]12 - 4 = 8 \: cm[/tex]
Diameter of 1 ball:
[tex] \frac{8}{4} = 2 \: cm[/tex]
Anyone knows the answer to this?
It shows the graph of a car's acceleration and its asking what's the acceleration around 6 seconds and 7 seconds.
Answer:
B 7.5mph/s
Explanation:
use change in y/ change in x
How long does it take a 15 kW car motor to do 4.7 × 10^6 J of work?
Answer:
310 s
Explanation: t = w ÷ p = 4.7 x 10^6J ÷ 15,000w
t = 310 s
Can carrying an object be said to be doing work on that object?
Answer:
Only if that object is being moved while carried
Explanation:
Work = Force • distance travelled
While holding an object would need force equal to that objects mass multiplied by 9.8, if it hasn't moved, then no work is done.
if you were to carry the object and have it travel some distance, then work would be done on that object.
why is the freezer compartment of a refrigerator kept at the top in terms of conduction convection and radiation
Answer:
The freezer compartment is at the top of a fridge because cool air sinks. (convection current)
Explanation:
Use the drop-down menu to answer the question. "Take a Closer Look" shows the Hubble telescope. Where is the Hubble telescope located?
Answer:
space
Explanation:
I got it right on E d i n u i t y
A space telescope called the Hubble was put into low-Earth orbit. Therefore, Hubble telescope is located in space.
What is Hubble telescope?A space telescope called the Hubble was put into low-Earth orbit around 1990 and continues to be in use today. Although it wasn't the initial space telescope, it is one of the biggest and most useful ones. It is famous for being both an essential scientific instrument and a public relations success for astronomy.
One of NASA's Big Observatories, the Hubble telescope being dedicated after astronomer Edwin Hubble. Hubble's targets are chosen by the Space Telescope Scientific Institute, which also handles the data processing, while the spacecraft is managed by the Goddard Space Flight Center at NASA. Hubble telescope is located in space.
Therefore, Hubble telescope is located in space.
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