If you put 300 J of heat into an engine with an efficiency of 0.35, how much work can be done? 3. How much energy must be put into an engine with an efficiency of 0.6 if 270 J of work are required? 4. An engine with an efficiency of 0.425 uses 1200 J of energy. Find the amount of energy wasted by the engine. 5. Calculate the efficiency of an engine operating between temperatures of 258 K and 600 K 6. An engine runs with its exhaust (cold) reservoir at a temperature of 200 K. To what temperature should the input (hot) temperature be set if an efficiency of 0.8 is desired? 7. Complete the following table of temperatures. Fahrenheit Celsius Kelvin 213 15 98.6 75 408
Sort the balloons based on the kinds of charges they carry.
first one is negative
second is none
third is posotive
last one is negative
left to right order
Answer:
Explanation:
thats the answer
SCIENCE
What does the nucleus of the cell control?
A. Life functions
B. Cell transport
C. Waste excretion
D. Energy production
Answer:
I believe A would be the best answer
Explanation:
Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane
Waste excretion is controlled by the vacuole
Energy production is the mitochondria (the mitochondria is the power house of the cell)
Life functions include cellular reproduction and the nucleus contains the genetic information to do this
Answer:
a
Explanation:
If 2,575J of heat is added to a 250g piece of silver, the change in temperature of the silver will be 43.6 °C? What is the specific heat of of silver
Answer:
58.56°C
Explanation:
Brrrrrrrrrrrrrr
Answer:
0.236 C
Explanation:
Which of the following is an example of the transformation of gravitational potential energy into motion energy (kinetic energy
A tire rolling along a level floor
A ball going up after being tossed into the air
gley
ve
A drop of water falling from a faucet into a sink
None of these because gravitational potential energy cannot be transformed into motion energy
Answer:
A drop of water falling from a faucet into a sink
_____ are both ways of preserving current energy resources.
1.Increasing efficiency and energy conservation
2.Removing insulation and using incandescent bulbs
3.Energy conservation and removing insulation
4.Using incandescent bulbs and increasing efficiency
Answer:
4
Explanation:
I think if not. I am sorry
Answer: 1
Explanation: sorry im late
chose the one with more potential energy: a 25kg bear or a 30kg bear in a tree?
Answer:
a 30kg
Explanation:
a 30kg
What was Orsted’s historic discovery?
Answer:
The electric current in a wire can deflect a compass needle if its magnetized.
Explanation:
a lorry has a mass of 32000 kilograms. each tyre has an area of 400 cm squared in contact with the ground. calculate the pressure exerted on the ground if the lorry has 6 tyres
Answer:
Your answer is 1306666.6667 Pascal
What is the critical angle for a ray trying to pass from glass (n = 1.52) into water (n = 1.33)? (Water n = 1.33, Air n = 1.00) (Unit = deg)
Answer:
59.52
Explanation:
59.5 in sigfigs
got it right on Acellus
Answer:
61.05
Explanation:
correct on acellus
an aircraft landing on an air craft carrier is brought to a complete stop from an inital velocity of 215km/hr in 2.7 seconds. what is iys acceleration in m/s2
he Big Bang Theory suggests....
a
The universe began in an instant.
b
The universe was born from clouds of dust and gas.
c
The single point containing the universe exploded and the universe stretched and expanded.
d
Gravity began to form stars and galaxies from clouds of dust and gas.
e
Both A and C.
f
Both B and C.
g
None of the above.
Answer:
C
Explanation:
To know more head to.
https://phys.org/news/2015-12-big-theory.html
Answer:
i think a and c
Explanation:
The s.I unit of R so that the equation velocity= R × density S dimensionally correct R is a constant
Answer:
R = m⁴/kg . s
Explanation:
In this case, the best way to solve this is working with the units in the expression.
The units of velocity (V) are m/s
The units of density (d) are kg/m³
And R is a constant
If the expression is:
V = R * d
Replacing the units and solving for R we have
m/s = kg/m³ * R
m * m³ / s = kg * R
R = m * m³ / kg . s
R = m⁴ / kg . sThis should be the units of R
Hope this helps
What does a lighting bolt and getting shocked by a doorknob have in common?
2. David roller skates 15 miles in 75 minutes. What is his average speed in miles per hour?
1
Which type of energy is the result when a drum is hit with a drumstick?
OA. electrical energy
OB. light energy
OC.
sound energy
OD.
all of these
Reset
Submit
Answer:
That drummer has mechanical energy as he moves the drumsticks to hit the drums and cymbals. So I'm pretty sure it's OD. sound energy.
¯\_(ツ)_/¯¯
A halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius of 12-meters with a tangential velocity of 5 m/s. Determine acceleration of the halfback.
Answer:
The right answer is "15.072 m/s".
Explanation:
The given values are:
Radius,
= 12 m
Time,
= 5 m/s
As we know,
⇒ [tex]s=\frac{d}{t}[/tex]
On substituting the given values in the above formula, we get
⇒ [tex]=\frac{2 \pi(12)}{5}[/tex]
⇒ [tex]=\frac{2\times 3.14\times 12}{5}[/tex]
⇒ [tex]=\frac{75.36}{5}[/tex]
⇒ [tex]=15.072 \ m/s[/tex]
4. What is the period of the microwaves in the above question?
Answer:
The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle.
A 75kg soccer player runs rightward with a velocity of +1.5 m/s toward a 0.43 kg
soccer ball at rest on the grass. If the final speed of the soccer ball is +15 m/s,
what is the final speed of the soccer player?
Answer:
Right
Explanation:
75kg soccer player runs rightward with a velocity of +1.5 m/s toward a 0.43 kg soccer ball at rest on the grass. If the final speed of the soccer ball is +15 m/s, ...
Construct arguments based on evidence about the applications, benefits, and problems of nuclear energy as an alternative energy source.
Answer:
Explanation:
Clean Energy Source It generates more than 800 billion kilowatt hours of electricity each year and produces more than half of the nation's emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.
If I'm wrong I'm sorry
If I'm right thank you and (brainliest plz)
If an object free-falls for t seconds from rest to d distance, how far will the object fall from rest in twice the elapsed time?
Answer:
When the time of fall is doubled, the height of fall will be quadrupled
Explanation:
Given;
height of fall, h = d m
time of fall, t = t s
initial velocity of the object, u = 0 m/d
The height of fall of the object is calculated from the kinematic equation below;
[tex]h = ut + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\2h = gt^2\\\\g = \frac{2h}{t^2}[/tex]
where;
g is acceleration due to gravity, which is constant
if the time of fall is doubled, the height of fall is calculated as;
[tex]\frac{2h_1}{t_1^2} = \frac{2h_2}{t_2^2} \\\\\frac{h_1}{t_1^2} = \frac{h_2}{t_2^2}\\\\(Note: h_1 = d, \ and \ t_1 = t)\\\\h_2 = \frac{h_1t_2^2}{t_1^2} \\\\h_2 = \frac{(d)(2t_1)^2}{t_1^2} \\\\h_2 = \frac{(d)(2t)^2}{t^2}\\\\h_2 = \frac{(d)\times 4t^2}{t^2}\\\\h_2 = 4d[/tex]
Therefore, when the time of fall is doubled, the height of fall will be quadrupled
A6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ?? cm.
Answer:
7.8cm
Explanation:
Answer:
7.8
Explanation:
Use the drop-down menus to complete the sentences. Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a . A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a .
Answer:
vestigial structure
Homologous structure
Explanation:
Did the assignment.
Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a vestigial structure.
A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a Homologous structure.
What is vestigial structure?
Some organisms have elements that seem to be left over from an earlier ancestor but have no apparent purpose. For instance, because they are evolved from reptiles with legs, certain snakes have pelvic bones despite not having any. The human vermiform appendix is another instance of a structure that serves no purpose.
Vestigial structures are these inactive, purposeless structures. Other examples of vestigial structures are the wings of flightless animals like the ostrich, the leaves of some cacti, the remains of whale pelvic bones, and the eyes that are blind in cave mammals.
Learn more about vestigial structure here:
https://brainly.com/question/29208010
#SPJ5
name any one group one element in periodic table
Explanation:
first line is the group one element all are group 1 elements
A large body of water with land all around it
Answer:
i think its a lake
Explanation:
Answer: What do you call a large body of water surrounded by land?
A lake is a large body of water surrounded by land on all sides.
Explanation:
Why is it very dangerous
for the driver and
passengers if any bubbles of gas get into
the brake fluid? Even worse what would go wrong if the break fluid leaked out of its pipes?
Answer:
If it leaks....
If there is a brake fluid leak and air gets mixed with the fluid in the brake lines, then the fluid will not be able to flow correctly. As a result, when you press your foot down on the brake pedal, it will feel squishy or spongy. In other words, the brake pedal will feel very soft.
If air bubbles get into....
Air is the enemy in a hydraulic system because it reduces pressure and essentially makes the process less effective. When air gets into the brake lines, your brake system suffers. Symptoms that can indicate you have air in your brake lines include the following: Brake pedal feels spongy when you press down
Hope it helps!!!!
1.Energy is used when a force acts over a.....................
.................................................
2.All objects have the same weight have:
a)the same place on Earth
b)the same mass
c)the same volume
d)pull of gravity on them
Answer:
the same mass answer b) but i dont know first question
What if we minned astroids
Which of the cars above are traveling at the same velocity?
A) c and d
B) b,c,d and f
C) b,c and d
D) b and c
Answer:
b,c,d,and f are the car traveling at the sane velocity
100 POINTS + BRAINLIEST IF GOOD ANSWER!!!
What medium is the wave traveling through?
Answer:
ac=alternating current
Explanation:
It is what ac or alternating current looks like while traveling.
Which is a device that stores electric charge by separating positive and negative charges?
O a conductor
O a dielectric
O a resistor
O a capacitor
Answer:
The last one, a capacitor
Explanation:
Right on edge.