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
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 is the best matral or mechaniazime to use in a egg drop form 30 feet
Answer:
Ok so there are many ways to go at this.
you can get a zip lock bag and put a bunch of plastic around the egg inside the bag. (image down below)
Just anything to slow down the descent speed.
Cushion the egg so that something other than the egg itself absorbs the impact of landing.
Explanation:
What is the difference between a reflected and a diffracted sound wave?.
Answer:
a reflected sound wave completely bounces off an object and diffraction occurs when there is an opening in a wall and only the waves that can fit through the wall go and then the waves start to expand again after going through the hole.
Explanation:
What is the half-life radioactive isotope?
Answer:
The half-life of a radioactive isotope is the time taken for half the unstable nuclei in a sample to decay.
A 39-Ω resistor is connected across a 45-V battery. A. What is the current in the circuit? b. How much energy is used by the resistor in 5. 0 min?
Answer with explanation
a) Formula to find the current that passes through a circuit is :
Voltage = Current × ResistanceGiven that,
Voltage = 45V
Resistance = 39Ω
Current =?
Let us find it now.
V = I × R
45V = I × 39Ω
Divide both sides by 39.
1.153A = I = Current
b) Formula to find the energy is:
Energy = voltage × current × time= 45V × 1.153A × ( 5 × 60)s
= 15565.5 J
= 15.5655kJ
a horseshoe magnet is a type of magnet true or false?
________________________________
STAY SAFE, STAY HEALTHY AND BLESSED .HAVE A GREAT DAY !THANK YOU !
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
please mark brainliest ♡
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?
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
How is it possible to lift a heavy car with a small force?
Answer:
By applying relative small force to the smaller piston
Explanation:
If a car sits on top of the large piston, it can be lifted by applying a relatively small force to the smaller piston, the ratio of the forces being equal to the ratio of the areas of the pistons
My aunt and uncle live somewhere in south Florida near the beach
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
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]
A 6.0 kg metal ball moving at 4.0 m/s hits a 6.0 kg ball of putty at rest and sticks to it. The two go on at 2.0 m/s.
(a) What is the kinetic energy of the metal ball before it hits?
(b) What is the kinetic energy of the metal ball after it hits?
(c) What is the kinetic energy of the putty ball after being hit?
(d) How much energy does the metal ball lose in the collision?
(e) How much kinetic energy does the putty ball gain in the collision?
(f) What happened to the rest of the energy?
The metal ball lost energy while the putty ball gained energy.
What is momentum?Momentum is the product of mass and velocity of the body. We must note that momentum before collision is equal to momentum after collision.
1) Kinetic energy before collision = 1/2mv^2 = 0.5 * 6 * 4 = 12 J
2) kinetic energy after collision = 0.5 * 6 * 2= 6 J
3) Kinetic energy of putty ball = 0.5 * 6 * 2= 6 J
4) Energy lost by the metal ball = 12 J - 6 J = 6 J
5) Energy gained by the putty ball = 6 J - 0J = 6 J
6) The rest of the energy was converted to heat after the collision.
Learn more about kinetic energy: https://brainly.com/question/999862
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
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
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
What is the electric current measured in
An ampere (AM-pir), or amp
The mass after a physical change, such as ice melting into water, stays the same a. -true b. -false.
Answer:
Yes, it can be destroyed.The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
Explanation:
hope this helps
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
The source of a sound moves away from the listener. The listener has the impression that the source is __________.
Explanation:
As the source of sound waves approaches you the sound waves get closer together, increasing their frequency and the pitch of the sound. The opposite happens when the source of sound waves moves away from you
Easy point...
Why the gravity is zero at the centre of earth?
Note:-
✯ No spam
✯ No copied answers
✯ No short answers
Let's see why g is 0 at centre of earth
[tex]\\ \rm\rightarrowtail g\propto \dfrac{1}{h}[/tex]
Means g is indirectly proportional to height of object.
If height is more gravity is lessIf height is less gravity is moreAt centre h=0
So if height is 0 then gravity is also zero.And at centre the distance from top of earth surface is equal in opposite directions from centre.
So
[tex]\\ \rm\rightarrowtail F_{net}=0[/tex]
So gravity remains 0Hello! Answer is below.
The center of the earth has no gravity, at all, since its pulling on you in all other directions (hints to why you can float if you were in a room/ spaceship, since there are so many massive objects).Gravity pulls us because there are massive objects that exert a gravitational force on everything around them. The further away the object is, the weaker the force is. For exapmple, if all those massive objects dissapeared, we would be able to walk freely. Meaning,we could walk the way we do on earth.
Hope this helps.
-Natalia.
if a 15 kg box is lifted up 3 meters, how much work is done?
Answer:
I believe the answer is 45
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:
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.
How much impulse is required to change the velocity of a 2500 kg truck by 15 m/s?
Answer:
A car weighing 2500 kg and travelling at 15 m/s stops at a distance of 25 m deceleration uniformly. What is the force exerted on it by the brakes?
Ad by Ireland
Fall in love with the rich cultural heritage of Ireland.
Explore the hidden beauty and the rich cultural heritage of Ireland on your next trip.
Learn More
5 Answers
Naren Nagarajan
, Cambridge Examinations Officer at Kasiga School, Dehradun (2008-present)
Answered 3 years ago · Author has 1.1K answers and 1.9M answer views
(a) W= Fd ( energy = force x distance )
(b) KE = .5 m v*v ( Kinetic energy of the car )
KE =0.5 * 2500 * 225KE =281250 Joules
Using (a) , Reducing kinetic energy to zero over 25 m
281250 = F * 25
F = 281250 /25
F = 11250 N
To check or use a different method …..
v^2 = u^2 +2as ( Third equation of motion )
2as = v^2 -u^2 ( v = 0 and U = 15 )
as = -225/2
a = - 225/2 * 25
a= - 225/50
a= - 4.5 m sec ^ -2
F = ma
F = 2500 * - 4.5
F = - 11250 N ( the negative sign indicates that the force is opposite in direction to the motion of the car )
The answer is correct since both values for F are equal.
a bomb sitting at rest on a table explodes into four pieces of equal mass. the first piece travels to the south at a velocity of 55.0 m/s. the second piece travels to the west at a velocity of 80.0 m/s. the third piece travels at a velocity of 40.0 m/s [30.0 w of n]. what is the velocity of the fourth piece?
The velocity of the fourth piece after the explosion is 118.5 m/s at 14.7⁰ east of north.
Conservation of linear momentumThe principle of conservation of linear momentum states that the sum of the initial momentum is equal to sum of final momentum.
Initial momentum of the bomb before explosion is equal to the final momentum of pieces of bomb after explosion.
Pi = Pf
0 = P₁ + P₂ + P₃ + P₄
0 = mv₁ + mv₂ + mv₃ + mv₄
0 = v₁ + v₂ + v₃ + v₄
Resolve the velocity into x and y componentsConsider x-y plane for the velocity of the piece of bomb;
Let southward = negative directionLet northward = positive directionLet eastward = positive directionLet westward = negative direction[tex]0 = (v_1x + v_1y) + (v_2x + v_2_y) + (v_3x + v_3_y) + (v_4_x + v_4_y)\\\\0 = (0 - 50y) + (-80x + 0) + (-40cos30x + 40sin30y) + (v_4_x + v_4_y)\\\\0 = -50y -80x - 34.64x + 20y + v_4_x + v_4_y\\\\0 = -30y - 114.64x + v_4_x + v_4_y \\\\v_4_x + v_4_y = 114.64x + 30y\\\\|v_4| = \sqrt{114.64^2 + 30^2} \\\\|v_4| = 118.5 \ m/s\\\\tan(\theta ) = \frac{30}{114.64} \\\\tan(\theta) = 0.262\\\\\theta = tan^{-1} (0.262)\\\\\theta= 14.7 \ ^0[/tex]
Thus, the velocity of the fourth piece is 118.5 m/s at 14.7⁰ east of north.
Learn more about conservation of linear momentum here: https://brainly.com/question/7538238
what are ohmic resistors?
An ohmic resistor is a resistor that obeys Ohm's law V = IR (voltage = current x resistance). Therefore, if the voltage in such element is increased by n number of times, by the same number n has to increase the current.
[tex] \\ [/tex]
hope it helps:)
Ohmic resistors are materials that obeys ohms law.
What is ohmic resistor?An ohmic resistor is a material that obey's ohms law. This material does not allow passage of electricity through it.
V = IR
where;
I is the current in the conductorR is the resistanceV is the voltageThus, ohmic resistors are materials that obeys ohms law.
Learn more about ohms law here: https://brainly.com/question/231741
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:
