Answer:
[tex]Ebp=9J[/tex]
Explanation:
Potential energy:
[tex]Ep=mgh[/tex]
m - mass
h - altitude = 20cm = 0.2 m
[tex]Epa=12=0.2(mg)[/tex]
Thus:
[tex]mg=\frac{12}{0.2}[/tex]
[tex]mg=60n[/tex]
In Point B:
[tex]Epb=mg(0.15)[/tex]
[tex]Epb=60(0.15)[/tex]
[tex]Epb=9J[/tex]
Gold has a density of 19300 kg/m³. Calculate the mass of 0.02 m³ of gold in kilograms.
Answer:
Mass = 386 kg
Explanation:
Density = Mass / Volume
Mass = Density × Volume
Where D = 19300 kg/m³ , V = 0.02 m³
Putting the given in the above formula
Mass = 19300 × 0.02
Mass = 386 kg
Answer:
386 kg
Explanation:
mass = density * volume
= 19300 * 0.02
= 386 kg
Hope this helps!
Calculate the amount of energy transferred when a 40w light bulb is left on for 30 minutes.
Answer:
E=72000J or 72kj
Explanation:
The formula is E=pt you need to convert your t from minutes to seconds before proceeding
Date
Page
710
Amachine raises a load of 750N
through a height
of 16m in 5 sec
calculate
a) work done by machine
b) Power of machine
Answer:
W=F×H,Power=W/Time
Explanation:
W=Force ×Height
750N×16 =12000
Power=Work/Time
12000/5=2400J
3.
A body starts moving from rest and attains the acceleration of 0.5 m/s2. Calculate the
velocity at the end of 3 minutes and also find the distance travelled by it during that
time.
Answer:
90 m/s
8100 m
Explanation:
Given:
v₀ = 0 m/s
a = 0.5 m/s²
t = 3 min = 180 s
Find: v and Δx
v = at + v₀
v = (0.5 m/s²) (180 s) + 0 m/s
v = 90 m/s
Δx = v₀ t + ½ at²
Δx = (0 m/s) (180 s) + ½ (0.5 m/s²) (180 s)²
Δx = 8100 m
A 2.0 g ball with a +0.05 C charge is moved from the negative plate to the positive plate, and then is released. The potential difference between the plates is 12.0V. When the ball strikes the (–) plate its velocity is most nearly equal to
Answer:
24.5 m/s
Explanation:
Since the work done by the electric field on the charge equals the kinetic energy of the ball, then
qV = 1/2mv²
and v = √(2qV/m)
where q = charge = + 0.05 C, V = potential difference = 12.0 V, m = mass of ball = 2.0 g = 0.002 kg
Substituting the values into v, we have
v = √(2 × + 0.05 C × 12.0 V/0.002 kg)
= √(1.2 CV/.002 kg)
= √(600 CV/kg)
= 24.5 m/s
Give two examples of spatial interference which can be easily observed. Small explanation of each object please, just so I can understand.
Answer:
Spatial interference describes the correlation between waves at different points in space.
The two example of spatial interference are as following:
alphanumeric characters can be easily identified in isolation but difficult to be identified when these characters are surrounded by optotypes because visual acuity will be reduced by crowded conditions that limit resolution at several stages of visual processing.Birds are able to identify visual target slowly that are presented at the top than to that same visual target presented at the bottom.Hence, different waves in a space correlate result into Spatial interference.
A body of mass 1kg has a 25kgsmsqure moment of inertia about its center of mass. if it rotated about an axis which has a displacement (5,12)m, its moment of inertia about this axis becomes
Answer:
194 kg m²
Explanation:
Use parallel axis theorem:
I = I₀ + mr²
I = 25 kg m² + (1 kg) ((5 m)² + (12 m)²)
I = 25 kg m² + 169 kg m²
I = 194 kg m²
if it takes 20 n to move an object 20m how much work was done
Answer:
[tex]\boxed{Work \: done = 400 \: N-m}[/tex]
Explanation:
Force = 20 N
Displacement =20 m
Work Done = Force × Displacement
= 20 × 20
= 400 N-m
Please Hurry!! This is very simple!
What are your thoughts about the connection between exercise and memory? How often do you exercise? Do you exercise more or less now that you are no longer on campus? Is that a good or bad thing? Why?
Answer:
What are your thoughts about the connection between exercise and memory?
I think its important to memorize how much u work out and exersize. make sure u dont do it too much or u might pass out. keep track of ur health by memorizing what u ate and when u ate before doing a lot of movement. you might throw up. Exercising is obviously very important for your body.
How often do you exercise?
5 times a week. (5/7 days)
Do you exercise more or less now that you are no longer on campus? Is that a good or bad thing?
A little less. But i think its a good thing
Why?
I used to go to a gym near campus! But now some are a little farther but during this time of quarantine, i work out at home and do the basics like running and agility. I think its good because it teaches me the exercising i can do at home instead of getting memberships and using my money. now i can spend money wisely and still exersize.
Mark as brainliest!
hope this helps! :)
make any changes if ud like
Explanation:
Pleasssseeee helpppp i will mark brainlest
Answer:
the second and the third
Explanation:
the maximum daylight hours is the second, and the warmest temperatures for the northem hemisphere.
An 82 kg jogger has 810 J of kinetic energy. What is the jogger’s velocity? 4.4 m/s 9.9 m/s 19 m/s
Answer:
4.4 m/s
Explanation:
KE = ½ mv²
810 J = ½ (82 kg) v²
v = 4.4 m/s
Answer:
4.4
Explanation:
got right on edg
Which is a characteristic of all waves?
All waves carry energy.
All waves move through space.
All waves move through matter, from particle to particle.
All waves transfer energy parallel to the direction of wave mo
Answer:à
Explanation:waves carry energy in the direction in which they move
Characteristics of all waves:
All waves carry energy.
All waves move through space.
All waves move through matter, from particle to particle.
All waves transfer energy parallel to the direction of wave mo tion.
What will happen if a spoon measuring 5 °C is placed into a glass of water measuring 20 °C?
A. Heat will move from the water to the spoon until the spoon reaches 20 °C.
B. Heat will move from the spoon into the water until both are balanced at 25 °C.
Heat will move from the spoon into the water until the temperatures of both are balanced
at 15 °C.
C.
D.
Heat will move from the water to the spoon until the temperatures of both are balanced
between 5 °C and 20 °C.
Answer:
d
Explanation:
if a ray of light is incident on plane mirror at an angle of 300 its angle of reflection is.
Answer:
300°
Explanation:
both the angles of incidence and reflection are the same
What change occurs to the gravitational force of attraction between two bodies when the
distance between them is made half (1/2) by keeping masses constant?
Answer:
when the radius is halved, F becomes 4 times
Explanation:
The formula is given by
[tex]F = \frac{Gm1m2}{r^2}[/tex]
When r is halved:
[tex]F = \frac{Gm1m2}{(1/2r)^2}[/tex]
=> [tex]F = \frac{Gm1m2}{1/4 r^2}[/tex]
=> [tex]F = 4(\frac{Gm1m2}{r^2} )[/tex]
This means when the radius is halved, F becomes 4 times
The image shows a man on a cliff. What type of energy does he possess?
1 point
Answer:
potential energy
Explanation:
Un tubo metálico tiene 100 metros de longitud cuando está a 0 oC y 100,13 metros cuando se calienta hasta 100 oC. ¿Cuál es el coeficiente de dilatación del material?
Answer:
α= 1.3 10-5 ºC⁻¹
Explanation:
La dilatación termica de los cuerpos esta dada por la relación
ΔL = L₀ α ( T -T₀)
en este caso nos piden el coeficiente de dilatación térmica
α =DL/L₀ DT
calculemos
α = ( 100,13 -100)/[100 (100 – 0)]
α = 1,3 10-5 ºC⁻¹
Traduction
The thermal expansion of bodies is given by the relationship
ΔL = L₀ α (T -T₀)
in this case they ask us for the coefficient of thermal expansion
α = ΔL / L₀ ΔT
let's calculate
α = (100,13 -100) / [100 (100 - 0)]
α= 1.3 10-5 ºC⁻¹
when a body of mass 0.25kg is acted upon by a force, the velocity changes from 5m/s to 7.5m/s. Calculate the work done by the force
Answer:
Work done by the force = 1/2m×(v2 - v1)²
m = mass
v2 = final velocity
v1 = initial velocity
= 1/2(0.25)(7.5-5)²
= 1/2(0.25)(2.5)²
= 1/2(0.25)(6.25)
= 0.78J
Hope this helps.
Question 1: A man trailing a trolley bag and suddenly, the wheels of the trolley bag get locked. The man realises that he has to put extra effort to drag the bag. The man finds it difficult to drag the bag because
Answer: Because of the friction force acting directly on the bag.
Explanation:
The function of the wheels is diminish the effect of the friction force, when the friction pulls back, it makes the wheel rotate, and this force is not applied directly on the bag.
Now the wheels are not working, so now the friction is acting directly on the bag, this is why the mand finds more difficult to drag the bag.
Compare and contrast speed, velocity, and acceleration. Why do their differences matter?
Answer:
Speed is a scalar quantity, that is, it is a number and indicates how fast (or slow) one travels at any given time.
Velocity is a vector quantity, this means that it has magnitude and direction, that is, how fast an object travels and its where its going (speed + the direction in which the object moves).
Acceleration is the ratio of the velocity change over the time interval in which this velocity change occurred. Acceleration as well as velocity is a vector quantity so it is made up of magnitude and direction.
The differences between these three quantities are important for the description of the movement. In the case of speed and velocity, its difference lies in the fact that velocity indicates the direction in which the movement is taking place (and speed is only a number), which in many physical phenomena the direction of movement is an important property. And the difference between acceleration and velocity is that acceleration instead of a velocity indicates a change in velocity (either in magnitude, direction or both), which tells us how fast a velocity will increase or decrease over time.
A 38.5 kg man is in an elevator
accelerating downward. A normal
force of 343 N pushes up on him.
What is his acceleration?
Answer:
F = m*(g - a) →
a = g - F/m = 0.891 m/s² downward
Explanation:
If elevator was stationary, the normal force of elevator floor on man* would be = mg
mg = (38.5)(9.81) ≈ 378 N.
If elevator is accelerating downward the floor is accelerating away from man and so the normal force will be less than man's weight by: 378 - 343 = 35 N.
Hope this helps.
Answer:
-0.891
Explanation:
negative because downward
which atomic particle has no charge?
A. Electron
B. Neutron
C. Nucleus
D. Proton
Answer:
B. Neutron has no charge
Answer:
B. Neutron
Explanation:
Firstly, the nucleus is what contains the protons and electrons, so it is not an atomic particle. The electron has a negative charge, and the proton has a positive charge (you can remember this by looking at its prefix 'pro'). This means the neutron has no charge (think of it as neutral).
An atom of xenon has a mass number of 127 amu. How many neutrons
does it contain? *
Answer:
73 neutrons.
Explanation:
Data obtained from the question:
Mass number of Xenon = 127.
Neutron number =...?
We can obtain the number of neutron present as follow:
Atomic number of Xenon = 54
Recall:
Atomic number = proton number = 54
Mass number = proton + neutron
127 = 54 + Neutron
Neutron = 127 – 54
Neutron = 73.
Therefore, 73 neutrons are present in the Xenon atom.
The law of motion that states that an object's acceleration is directly related
to the net force applied and inversely related to the mass of the object is
Answer:
Newtons 2nd law
F = ma
Explanation:
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Dynamo converts the
a》mechanical energy into electrical energy
b》chemical energy into electrical energy
c》heat energy into electrical energy
d》none of the above
Answer:
[tex] \gamma \: dynamo \: converts \: the \: mechanical \: energy \: into \: electrical \: energy \: .[/tex]
Explanation:
Hope it helps you :)))
Answer:
.
Explanation:
state newtons second law of motion from the equation f: ma
Newton's Second Law of Motion states "The rate of change of momentum of a body is directly proportional to the applied unbalanced force in the direction of force".
A family has husband wife and three children A B and C the present age of husband is 5 years more than the vice president age the vice president age is twice the present age of a the present age of a is 12 years more than the present age of B 20 present age is one and a half times the present age of see if she is 12 years old at present what is the present age of husband's friend Ram who is 15 years younger than the husband
Answer:
38 years old.
Explanation:
So, we are given the following data or parameters or information which is going to assist us in solving this particular Question;
1=> The three children are A, B and C respectively.
2=> "the present age of husband is 5 years more than the wife's age."
3=> " the wife's age is twice the present age of A"
4=> the present age of A is 12 years more than the present age of B "
5=> B's present age is one and a half times the present age of C .
6=> "if C is 12 years old at present "
7=> "husband's friend Ram who is 15 years younger than the husband"
We will start from point 5 above that is to say;
B = C × 3/2. = 12 × 3/2 = 6 × 3= 18.
Also, A = 12 + B = 12 + 12= 24.
From the point 3 Above; the wife's age= 2 × A= 2 × 24 = 48 years of age.
From the point 2, we have that the husband's age = 5 + 48 = 53 years of age.
Thus, the present age of husband's friend, Ram who is 15 years younger than the husband = 53 - 15 = 38 years old
Which object has more gravitational potential energy
Answer:
need more context
Explanation:
Answer:
EL QUE TENGA MÁS MASA Y MÁS ALTURA.
Explanation:
What is the frequency of a wave if 10 waves go past in 1 second ?
Answer:
f = 10 Hz
Explanation:
We need to find the frequency of a wave if 10 waves go past in 1 second. Total number of waves per unit time is called frequency. So,
[tex]f=\dfrac{10}{1}=10\ Hz[/tex]
So, the frequency of a wave is 10 Hz.
Answer!!!!!!!!!!!!!!!!!!!!
Acceleration =change in velocity÷Time taken
or, Acceleration =final velocity-Initial velocity÷Time taken
or, a=v-u÷t
or, at=v-u
or, v-u=at
therefore, v=u+at