I NEED HELP QUICK

In one cycle of any heat engine

A. the net work done is larger than the heat exhausted.
B. more heat flows from the engine than enters the engine.
C. The internal energy of the engine does not change.
D. the net heat flow is zero.​​

Answers

Answer 1
C i’m pretty sure. correct me if i’m wrong :)

Related Questions

Questlon 3 of 25
What is the magnification of a real image if the image is 15.0 cm from a lens
d;
and the object is 60.0 cm from the lens? Use the equation m=--
d.
A. -0.25
B. -4.0
C. 4.0
O D. 0.25

Answers

CcccccccccccCccccccccccC

A constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110. Assuming the box starts from the rest, what is the final velocity vf of the box at 15.0 m point? If there were no friction between the box and the floor, what applied force Fnew would give the box the same final velocity?

Answers

We have that for the Question " constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110." it can be said that

the final velocity vf is

[tex]vf=3.83m/s[/tex]

and the applied force Fnew is

[tex]F_{new}=3.43N[/tex]

From the question we are told

A constant applied force Fp of 11.0 N pushes a box with a mass=7 kg a distance x=15.0 m across a level floor. The coefficient of kinetic friction between the box and the floor is .110. Assuming the box starts from the rest, what is the final velocity vf of the box at 15.0 m point? If there were no friction between the box and the floor, what applied force F new would give the box the same final velocity?

Generally the equation for the Force  is mathematically given as

F_p-\mu mg=ma

Therefore

11-0.110*7*9.8=7*a

a=0.49m/s^2

Using Newtons equation

v^2=u^2+2as

v^2=0+2*0.49*15

v=3.83m/s

Therefore

F=ma

F=0.49*7

F_{new}=3.43N

Therefore

the final velocity vf is

[tex]vf=3.83m/s[/tex]

and the applied force Fnew is

[tex]F_{new}=3.43N[/tex]

For more information on this visit

https://brainly.com/question/23379286

A small car is traveling at a speed of 60 mph on the highway. In the next lane, a large passenger bus is traveling at the same speed.

Answers

Answer:

A. The bus has more kinetic energy than the car.

Explanation:

As we know that

Kinetic energy is the amount of energy possessed by the body at the time when it is in motion.  

Also,

Kinetic energy = 1 ÷ 2mv²

Here m denotes the mass of the body

and v denotes the velocity of the body.

So it would be based on the mass & velocity of the body

As if the passenger bus contains more kinetic energy as compared to the car because of the big mass

Hence, the first option is correct

Which of the following describes the relationship between the velocity and
pressure of a fluid?
A. Pascal's principle
B. Archimedes' principle
C. Bernoulli's principle
D. Flow rate equation


Answer is c

Answers

Explanation:

I think its a option pascal's principal

Answer:

c

Explanation:

Just took the quiz

A car starts from rest and goes down a slope with a constant
acceleration of 5 m/s2
. After 5 s the car reaches the bottom of the hill. Its
speed at the bottom of the hill, in meters per second, is:

Answers

Answer:

25m/s

Explanation:

here we use 1st equation of motion

then we find this ans

A 2.60 kg lion runs at a speed of 5.00 m/s until he sees his prey. The lion then speeds up 8.00 m/s to catch it. How much work did do after he speeds up?

Answers

Answer: 50.7 J

Explanation:

Given

mass of lion is  [tex]m=2.6\ kg[/tex]

The initial speed of the lion is [tex]v_1=5\ m/s[/tex]

increased speed of lion is [tex]v_2=8\ m/s[/tex]

Initially, its kinetic energy is [tex]K_1=\frac{1}{2}mv_1^2[/tex]

Final kinetic energy [tex]k_2=\frac{1}{2}mv_2^2[/tex]

work did by lion after speed up is [tex]k_2-k_1[/tex]

[tex]\Rightarrow W=\dfrac{1}{2}\times 2.6[8^2-5^2]\\\\\Rightarrow W=1.3\times [39]=50.7\ J[/tex]

I will mark you brainlist!!

How is primary succession different from secondary succession? Give an example of an event that may lead to primary succession.

Answers

Answer:

Primary Succession is defined as the type of ecological succession, which occurs or start from the barren, uninhabited and unoccupied areas, such as the newly formed pond, rock, dunes, etc., while such kind of succession, which occurs in the area where there was the existence of life previously but got abandoned due to natural disturbances like deforestation, natural calamities (flood, earthquake, tsunami), the field with no vegetation is known as Secondary Succession

Explanation:

Some examples of primary succession include the formation of a new ecosystem after a volcano, glacier outbursts, or a nuclear explosion. Some examples of secondary succession include succession after fire, harvesting, logging, or abandonment of land or the renewal after a disease outbreak

i hope this answer helps :)

A washer is swung in a circle on a string as shown below. If the string
breaks which arrow shows the path the washer will take? *

Answers

Answer:

yabarrow

Explanation:

i think thats the name

1:
This diagram shows four different dishes on the kitchen shelf.
tea cup
IN
2:
bowl
50 N
mug
10 N
plate
SON
3:
999
4
:
Which of these dishes has the least potential energy?
bowl
5:
plate
mug
6:
tea cup

Answers

Answer:

Bowl will have maximum potential energy

Explanation:

It is the bowl that will have maximum potential energy.

It is because potential energy is high when both height and mass of the object is high.

Here in this case the bowl has maximum weight with maximum height except the tea cup but the potential weight of cup will not make much impact as its weight is very low.

(1 Point)
A truck's speed increases uniformly from 15 km h to 60 km/h in 20 s. Determine (a) the average
speed

Answers

Answer:

0.625 m/s

General Formulas and Concepts:

Unit 0

SI unit (distance) - metersSI unit (time) - seconds

Kinematics

Average Speed Formula: [tex]\displaystyle \frac{total \ distance}{time}[/tex]

Explanation:

Step 1: Define

[Given] Initial speed: 15 km/h

[Given] Final speed: 60 km/h

[Given] time: 20 s

[Solve] Average speed

Step 2: Convert

Initial speed

Set up conversion:                                                                                           [tex]\displaystyle \frac{15 \ km}{h}(\frac{1000 \ m}{1 \ km})(\frac{1 \ hr}{60 \ min})(\frac{1 \ min}{60 \ s})[/tex]Multiply/Divide [Cancel out units]:                                                                   [tex]\displaystyle \frac{25}{6} \ \frac{m}{s}[/tex]

Final speed

Set up conversion:                                                                                           [tex]\displaystyle \frac{60 \ km}{h}(\frac{1000 \ m}{1 \ km})(\frac{1 \ h}{60 \ min})(\frac{1 \ min}{60 \ s})[/tex]Multiply/Divide:                                                                                                 [tex]\displaystyle \frac{50}{3} \ \frac{m}{s}[/tex]

Step 3: Solve

Set up:                                                                                                               [tex]\displaystyle \frac{\frac{50}{3} \ \frac{m}{s} - \frac{25}{6} \ \frac{m}{s}}{20 \ s}[/tex]Subtract:                                                                                                            [tex]\displaystyle \frac{\frac{25}{2} \ \frac{m}{s}}{20 \ s}[/tex]Divide:                                                                                                               [tex]\displaystyle \frac{5}{8} \ \frac{m}{s}[/tex]

In one cycle of any heat engine

A. the net work done is larger than the heat exhausted.
B. more heat flows from the engine than enters the engine.
C. The internal energy of the engine does not change.
D. the net heat flow is zero.​

Answers

D. the net heat flow is zero

An object attached to a spring is pulled across a horizontal frictionless surface. If the force constant (spring constant) of the spring is 45 N/m and the spring is stretched by 0.88 m when the object is accelerating at 1.4 m/s2. What is the mass of the object?

Answers

Answer:

28.3kg

Explanation:

45=0.88*ml1.4

36.6=0.88m

divide through by 0.88

is said that

m=36.6/0.88

m=28.2857kg

Which of the following is the type of rock
layer disturbance that occurs when
molten rock squeezes into existing rock?
A. rock cycling
B. superpositioning
C. tilting
D. intrusion

Answers

Answer:

d. intrusion

Explanation:

An intrusion is molten rock from the Earth's interior that squeezes into existing rock and cools. Folding Folding occurs when rock layers bend and buckle from Earth's internal forces.

A car starts from rest and reaches a speed of 25m/s in 4 seconds. What is the acceleration?
Also, Calculate the distance the object traveled,

Can y’all help me with this one

Answers

Answer:

a = 6.25 m/s/s

d = 50 m

Explanation:

Given:

v1 (initial velocity)= 0 m/s (cz its at rest)

v2 (final velocity)= 25 m/s

t = 4s

a = ?

d = ?

to determine  acceleration

a = (v2 - v1)/ t

= (25m/s - 0m/s)/4s

= 6.25 m/s/s

to determine distance traveled

d = 1/2(v1 + v2)t

=1/2(0m/s+25m/s)(4s)

=50 m

Answer:

Answer in explanation.

Explanation:

Using Equation

[tex]v = u + at[/tex]

where v is the final velocity

u is initial velocity

a is acceleration

t is time taken

given u = 0, v = 25, t = 4,

[tex]25 = 0 + 4a \\ 4a = 25 \\ a = 6.25 \frac{m}{ {s}^{2} } [/tex]

Now, using equation

[tex]v {}^{2} = {u}^{2} + 2as[/tex]

where v and u remains the same, a = 6.25 and s is the distance,

[tex](25) {}^{2} = \: {0}^{2} + 2(6.25)s \\ 12.5s = 625 \\ s = \frac{625}{12.5} \\ s = 50m[/tex]

Compare and contrast chemical reactions and nuclear reactions in terms of particles involved . Select all the statements that apply Both chemical and nuclear equations are written with equal signs. Nuclear reactions create a difference in the number of protons, neutrons, and electrons after the reaction. A chemical reaction is the rearranging of atoms to form new substances. E=mc^ aleph 2 applies to both chemical and nuclear reactions. In a nuclear reactionparticles can transmute into others. Chemical reactions produce energy on levels comparable to nuclear reactions The total number of protons, neutrons, and electrons stay the same throughout the chemical reaction.

Answers

Answer:

. A chemical reaction is the rearranging of atoms to form new substances. E=mc^ aleph

Explain what happens to the path of light as it hits a piece of black paper, a glass mirror, and a glass
of water. Explain why the light behaves the way it does as it hits each object.

1. Light is _________ by the black paper.

2. Light is _________ by the mirror.

3. Light is _________ by the glass of water.​

Answers

1: absorbed
2: reflected
3: i forgot the last one

A 16 lb weight stretches a spring 6 inches in equilibrium. It is attached to a damping mechanism with constant c. Find all values of c such that the free vibration of the weight has infinitely many oscillations.

Answers

Answer:

[tex]-8<c<8[/tex]

Explanation:

Given data:

Weight W = 16 lb

length l = 6/12 = 0.5 ft

hence, spring constant  k = W/l = 16/0.5 = 32 lb/ft

The equation of motion of spring is

[tex]mx''+cx+kx=0\\0.5x''+cx'+32x=0[/tex]

the auxiliary equation can be written as

[tex]0.5r^2+cr+32=0\\r^2+2cr+64=0[/tex]

The discriminate of equation is

[tex]D =(2c)^2+-4(1)(64)\\=4(c^2-64)[/tex]

To get the value of the damping constant,

[tex]D<0\\4(c^2-64)<0\\c>-8, c<8\\-8<c<8[/tex]

According to Newton’s second law of motion, weight depends on an object’s mass and the net force acting on the object. True or false

Answers

Answer:

true..

Explanation:

Newton's 2nd law of motion is greater the mass of an object the more force it will take to accelerate the object

According to Newton’s second law of motion, weight depends on an object’s mass and the net force acting on the object. The given statement is true.

What is force?

Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.

The following equation help to understand the statement;

Force is defined as the product of mass and acceleration. Its unit is Newton.

F=ma

F=mg

W=mg

The weight of an item is determined by its mass and the net force exerted on it, according to Newton's second rule of motion. The provided assertion is correct.

Hence,the given statement is true.

To learn more about the force, refer to the link;

https://brainly.com/question/26115859

#SPJ2

A quantum dot may be modeled as an electron in a spherical well with perfectly reflecting walls. Design a quantum dot whose characteristic frequency of emission is 10 GHz, where characteristic frequency corresponds to decay from the first excited state to the ground state. In other words, obtain the radius a of the spherical cavity that has this property

Answers

Answer:

radius = 37.69 mm

Explanation:

Calculate the radius a of the spherical cavity that has this property

Frequency of emission = 10 GHz

This problem is similar to infinite spherical wall potential

first step:

Express the energy eigenvalue of the system : [tex]E_{100} =E_{Is} = \frac{9.87h^2}{2ma^2}[/tex]

First excited state energy can be expressed as : E[tex]_{IP}[/tex] = 20.19 h^2 / 2ma^2

Given that the frequency of emission (γ )   = 10 GHz

next step :

calculate the energy of emitted photon ( E ) = h γ

= 6.626 * 10^-36 * 10 * 10^9

= 6.626 * 10^-24 joules

E[tex]_{IP}[/tex]  - E[tex]_{IS}[/tex] = 6.626 * 10^-24

∴ a^2 = 1.42 * 10^-13  m^2

hence a = √ 1.42 * 10^-13 m^2   = 37.69 * 10^-6 m ≈  37.69 mm

Can you help with these physics questions about motion? Please!!!!

Answers

Answer:

Explanation:

5-) in the 1st system the right side is heavier, the system is moving in that way with a 9.8k m^2/s

in the 2nd system right side is heavier too, the system is moving in that way with a 9.8k m^2/s

in the 3rd system both sides got the same weight so the system isn't moving in anyway. 0 m^2/s

Calculate the induced electric field in a 54-turn coil with a diameter of 19.5 cm that is placed in a spatially uniform magnetic field of magnitude 0.5 T so that the face of the coil and the magnetic field are perpendicular. This magnetic field is reduced to zero in 0.1 seconds. Assume that the magnetic field is cylindrically symmetric with respect to the central axis of the coil.

Answers

Answer:

E = 3.049 N/C

Explanation:

Induced electric field = e/2 *(pi) *r

Induced electric field = e /(3.14 *19.5)  - Eq (1)

e = (pi)r^2*B/t

= 3.14 * (19.5/2*100)^2 * 0.50 T/ 0.1

= 1.867 V

Substituting this value in equation 1, we get –  

E = 1.867 V/(3.14 *19.5/100)  

E = 3.049 N/C

17
If 225 grams of water is to be heated from 25.0°C to 100.0°C to make a cu
tea, how much heat must be added? The specific heat of water is 4.18 J/g.
(5 Points)
63536)
70538)
117562)
705)

Answers

Answer:

Heat energy required (Q) = 70,537.5 J

Explanation:

Given:

Mass of water (m) = 225 grams

Initial temperature of water =  25.0°C

Final temperature of water = 100.0°C

Specific heat of water (c) = 4.18 J/g

Find:

Heat energy required (Q)

Computation:

Change in temperature Δt = Final temperature of water - Initial temperature of water

Change in temperature Δt = 100 - 25

Change in temperature Δt = 75°C

Using Heat energy formula

Q = (m)(c)(Δt)

Heat energy required (Q) = (225)(4.18)(75)

Heat energy required (Q) = 70,537.5 J

If the third harmonic produced by a musical instrument is 300 HZ, then the first overtone will be?​

Answers

Answer:

the first overtone is 200 Hz

Explanation:

The computation of the first overtone would be given below:

The following formula should be applied

n_1 = n_3 ÷ 3

= 300 ÷ 3

= 100 Hz

Now n_2 is

= 2 × 100

= 200 Hz.

Hence, the first overtone is 200 Hz

we simply applied the above formula and the same would be relevant

Which of Newton's laws
describes why an elephant
has a large amount of inertia?
A. Newton's 1st Law
B. Newton's 2nd Law
C. Newton's 3rd Law

Answers

Answer:

Newton's 2nd law think soo

It is a “a” because if something stays at rest it stay but if has movement then it will move

As amplitude of a wave increases, the
_____ of the wave also increases.

frequency

wave speed

wavelength

energy

Answers

i think so it is frequency

which instrument is accurate in measuring the dimensions of an object​

Answers

Vernier Caliper

Vernier Caliper

It is counted in the list of quality measuring instruments, which are used to measure small parameters with high accuracy. It has got two different jaws to measure outside and inside dimensions of an object. It can be a scale, dial or digital type Vernier calliper

Answer:

Vernier Caliper

It is counted in the list of quality measuring instruments, which are used to measure small parameters with high accuracy.


A boy weighs 50 kg and is running with 225 J of energy, what is his velocity?

Answers

0.22 Is the answer. Have a great day!

The statement "if I raise the temperature of
a cup of water, then an increased amount of
sugar will be dissolved" is an example of
A. an observation
B. a hypothesis.
C. a theory

Answers

B is the answer for this here question

Consider the two-slit interference experiment. Electromagnetic radiation passes through the two slits that are a distance 0.0287 mm apart. The path to the fourth-order bright fringe on the nearby screen forms an angle with the horizontal. What is the wavelength of the light?
409 nm

164 nm

570 nm

655 nm

Answers

Explanation:

Consider the two-slit Interference experiment. Electromagnetic radiation passes through the two slits that are a distance 0.0287 mm apart. The path to the fourth-order bright fringe on the nearby screen forms an angle with the horizontal. What is the wavelength of the light? (1 point) O 655 nm O 570 nm O 164 nm O 409 nm

COMPANY

Water flows through a garden hose which is attached to a nozzle. The water flows through hose with a speed of 1.81 m/s and through the nozzle with a speed of 18.3 m/s. Calculate the maximum height (in m) to which water could be squirted if it emerges from the nozzle and emerges with the nozzle removed. (a) Emerges from the nozzle. m (b) Emerges with the nozzle removed, assuming the same flow rate. m

Answers

Answer:

a) 17.086m

b) 0.1671 m

Explanation:

Given data: speed of water through the hose  = 1.81 m/s

through the nozzle = 18.3 m/s

We know that maximum height of an object with upward velocity v is given by,

a) H = v^2/2g

where H is the maximum height water emerges  

= 18.3^2/(2×9.8) = 17.086 m answer

b) Again,  

H = v^2/2g

= 1.81^2/(2×9.8) = 0.1671 m

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