Answer:
less
Explanation:
weight = mass * acceleration due to gravity----(1)
the acceleration due to gravity on Mars is less than on earth. From equation (1 )we can say that weight in Mars is less than earth.
steel bars, each of length 3cm at 29°c are to be used for constructing a rail line. lf the linear expansivity of steel is 1.0×10^-5k^-1, calculate the safety gap between successive bars if the highest temperature expected is 41°c
Answer:
Hi, Im Jenna! Here is ur ansswer Pls mark as braijnliest
Explanation:
solution.
The formula for linear expansivity is
α = (If – If) / If (0f – 0i ) is used to determine the linear expansivity
If – final length,
I – initial length
0f – final tempt.
0i – initial tempt.
(b) (ii)
I = 3 m
0 = 29oC
02 = 41oC
α = 1.0 x 10 k-1
using safety gap = change in length
Δ l = α I Δ Θ
1 x I0-5 x 3.0 x (41 – 29) = 3.6 x 10-3 m = 0.0036
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]
Help!!!!!!!!!!!!!!!!!
Answer:
(4) Elastomers
Explanation:
Substances which can be elastically stretched to large value of strain are called elastomers.
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)
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.
What happens during nuclear fission?
Answer:
Atoms are split apart, and they release energy
Explanation:
sry if I'm wrong
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
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:
An alpha particle is made up of __ __and
ions
protons
neutrons
C electrons
Ben lifts his 12kg daughter in the air from the ground to a height of 2.2m. How much work has he done? (Remember that weight = mass x gravitational field strength. Assume that g=10N/kg)
W= mg × d × cosx
W= 12 × 10 × 2.2 × (-1)= -264 J
I hope it helps you
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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
The fork-lift truck lifts a crate of mass 64 kg through a vertical distance of 3.5 m in 4.0 s.
Calculate the useful work done in lifting the crate.
The amount of work done by the fork-lift truck in lifting the crate is 2,195.2 Joules.
Given the following data:
Mass of crate = 64 kg.Displacement = 3.5 meters.Time = 4.0 s.Scientific data:
Acceleration due to gravity = 9.8 [tex]m/s^2[/tex].To calculate the amount of work done by the fork-lift truck in lifting the crate:
How to calculate work done.In Science, work done is generally calculated by multiplying force and the vertical distance or displacement experienced by an object.
Mathematically, work done is given by the formula:
[tex]Work\;done = force \times displacement = mgh[/tex]
Substituting the given parameters into the formula, we have;
[tex]Work\;done = 64 \times 9.8 \times 3.5[/tex]
Work done = 2,195.2 Joules.
Read more on work done here: brainly.com/question/22599382
A dog pulls on its lead (spring constant 10N/m), the lead extends by 0.1m. How much force did the dog apply to the rope?
Answer:
1N
Explanation:
F=ke
k=10N/m
e=0.1m
F=10*0.1
F=1N
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.
To know more about Hubble telescope, here:
https://brainly.com/question/30246219
#SPJ6
Help ASAPP!!!!!
Which of these is measured during a scientific investigation?
Test variable (independent variable)
Outcome variable (dependent variable)
Control group
Hypothesis
Answer:
A hypothesis predicts the value of a dependent variable given an independent variable:
If a person weighs 50 kg (independent variable) the weight hypothesis predicts that W = 50 * 9.8 = 490 N (the dependent variable)
So those three should be present in an investigation
help me please (｡'-‿-｡)
Answer:
the layers of atmosphere are heated through radiation and convection.
Explanation:
heat is transferred from sun through radiation
and current through convection
What iz inertia ? -,-
Inertia refers to the tendency of a body to resist changes.
InertiaIt is the property of a body to resist change.
A moving body will continue moving until a force acts on it. Unless the acting force is big enough to overcome the inertia of the body, the body will continue moving.
Also, a body at rest will continue resting unless a force big enough to overcome the inertia force is used to displace it.
More on inertia can be found here: https://brainly.com/question/1358512
Answer:
inertia, property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity. Inertia is a passive property and does not enable a body to do anything except oppose such active agents as forces and torques.
Before your interview ends, make sure to ask these questions:Will you please call me with the hiring decision?Will you please call me with the hiring decision?Is there a target date for the hiring decision?Is there a target date for the hiring decision?Are you interviewing any other applicants?Are you interviewing any other applicants?What is your preferred method for follow-up contact?What is your preferred method for follow-up contact?
Answer:
A and B
Explanation:
got it right
Answer:
Is there a target date for the hiring decision?
What is your preferred method for follow-up contact?
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.
a horseshoe magnet is a type of magnet true or false?
________________________________
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Help immediately! Answer I need help.
Answer:
0.80 m
Explanation:
elastic potential energy formula
elastic potential energy = 0.5 × spring constant × (extension) 2
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
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:
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. :)
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.
. 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.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 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
For more information on density
https://brainly.com/question/14010194
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
