Tim pushes a box with a constant force 250 N at an angle of 45° to the horizontal. If he pushes the box 22 meters, how much work has he done? Keep 4 significant figures.

Answer:

C

Explanation:

the image formed is real but inverted and magnified

you can remember it by R I M

hope this helps

The image results when the object is located between 2f (2 focal lengths) and f (the focal point) of a convex lens will be real, inverted, and enlarged.

An optical lens is made up of two spherical surfaces is a convex lens The lens is called a biconvex lens or simply convex lens if those surfaces are curved outwards.

Converging lens is another name for it. It's because it brings all the light rays that are parallel to the primary axis together at the focus point (F).

The image results when the object is located between 2f (2 focal lengths) and f (the focal point) of a convex lens will be real, inverted, and enlarged.

Hence, option C is correct.

To learn more about the convex lens, refer to the link;

https://brainly.com/question/1604692

#SPJ2

Answer:

Explanation:

Voltaje, tensión, corriente, resistencia, etc. son términos por diferentes investigadores (Danusso y Dupré 1987,

de un lenguaje común con el que todos estamos familia- Buchweitz y Moreira 1987, Dupin y Johsua 1987, Gauld

rizados al utilizarlos para referirnos al funcionamiento 1988, Varela, Manrique y Favieres 1988, Acevedo 1989,

de una gran cantidad de aparatos eléctricos y electróni- Andrés 1990, Licht y Thijs 1990). Las principales caraccos de nuestro entorno cotidiano. terísticas de las interpretaciones de los estudiantes sobre

los circuitos eléctricos que han destacado los investigadores

Las ideas básicas de electricidad son presentadas a los son:

estudiantes en los cursos de física del bachillerato, frecuentemente acompañadas de experimentos sencillos a) La idea de que la bombilla consume o atenúa la

con baterías y bombillas. Como consecuencia, muchos comente que circula por ella. Cuando se colocan varias

estudiantes de bachillerato, y todavía más los de universidad, bombillas en serie, los estudiantes predicen que la bombilla

son capaces, a veces, de resolver complicados circuitos más cercana al punto de donde «sale» la corriente brillará

con mallas eléctricas y de realizar montajes eléctricos con mayor intensidad que las otras, ya que la corriente se

relativamente sofisticados.

Answer:

The building is 746.666 meters high.

Explanation:

We know the total velocity of the rock ([tex]v[/tex]), in meters per second, and its horizontal speed ([tex]v_{x}[/tex]), in meters per second, at the moment right before its impact. It should be noted that the rock is experimenting a parabolic motion, which is the combination of a horizontal motion at constant speed and a free fall, which is an uniform accelerated motion due to gravity.

The final vertical speed of the rock ([tex]v_{y}[/tex]), in meters per second, is determined by the following Pythagoric formula:

[tex]v_{y} = \sqrt{v^{2}-v_{x}^{2}}[/tex] (1)

If we know that [tex]v = 123\,\frac{m}{s}[/tex] and [tex]v_{x} = 22\,\frac{m}{s}[/tex], then the final vertical speed is:

[tex]v_{y} = \sqrt{\left(123\,\frac{m}{s} \right)^{2}-\left(22\,\frac{m}{s} \right)^{2}}[/tex]

[tex]v_{y} \approx 121.017\,\frac{m}{s}[/tex]

Now we determine the height of the building ([tex]h[/tex]), in meters, by the use of the following kinematic expression:

[tex]h = \frac{v_{y}^{2}-v_{y,o}^{2}}{2\cdot g}[/tex] (2)

Where:

[tex]v_{y,o}[/tex] - Initial vertical speed of the rock, in meters per second.

[tex]g[/tex] - Gravitational acceleration, in meters per square second.

If we know that [tex]v_{y,o} = 0\,\frac{m}{s}[/tex], [tex]v_{y} \approx 121.017\,\frac{m}{s}[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then the height of the building is:

[tex]h = \frac{v_{y}^{2}-v_{y,o}^{2}}{2\cdot g}[/tex]

[tex]h = \frac{\left(121.017\,\frac{m}{s} \right)^{2}-\left(0\,\frac{m}{s} \right)^{2}}{2\cdot \left(9.807\,\frac{m}{s^{2}} \right)}[/tex]

[tex]h = 746.666\,m[/tex]

The building is 746.666 meters high.

Answer:

P= 720 watt

Explanation:

P= IV

P= (6)(120)

P= 720 watt

Answer:

No, you couldn't function the same as you do now.

Explanation:

This is because each cell follows individual tasks, and makes up specific parts of a body. For example, if all of your cells were those of an eye, you would be missing the components of arms, legs, etc.

Answer: No

Explanation: If all the cells of our body were of the same size, shape and volume, then they would all perform the same function and the multitude of other important functions cannot be carried out, without which human life itself would not be possible.

Explanation:

The teacher said to the students you can go home.

Into indirect speech

The teacher told the students that they could go home.

Hope it will help :)❤

KE = 2000 J

Explanation:

KE = (1/2)mv^2

= (1/2)(0.100 kg)(200 m/s)^2

= 2000 J

Answer:

c) star explosions.....

Answer:

look at the picture i have sent

Answer:

solution given:

frequency[f]=215.0Hz

velocity[V]=x

wave length=2.4m

we have

wave length=[tex] \frac{V}{f} [/tex]

2.4m=[tex] \frac{x}{215} [/tex]

2.4×215=[tex] \frac{x}{} [/tex]

x=516 m/s

velocity=speed =516m/s

Answer:

it is going 1.894miles in 25 hours so it travels 0.07576 miles per hour

Answer:

C. All energy in the universe is a result of mass being converted into energy.

Explanation:

Answer:

C

Explanation:

edgeee

Answer:

Definition of a scientific theory.

Answer:

theories on edge

Explanation:

Answer:

Syringes are used to take blood for blood tests. The pressure of the liquid (blood) forces the liquid to move into the syringe when its plunger is withdrawn. When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

please mark as brainliest

Answer: The area of the edge of a knife’s blade is very small

Syringes are used to take blood for blood tests.

When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

Skis have a large area to reduce the pressure on the snow.

Answer:

1. Plateau where the temperature stays constant

2. Melting

3. Boiling points of the substance

Explanation:

The relationship between kinetic energy and temperature is given as follows;

[tex]\overline E = \dfrac{3}{2} \times \dfrac{R}{N_A} \times T[/tex]

Where;

[tex]\overline E[/tex] = The average kinetic energy of the atom

R = The universal gas constant

[tex]N_A[/tex] = Avogadro's number

T = The temperature in Kelvin

Therefore, the kinetic energy increases as the temperature increases, however when the energy is not being converted into kinetic energy, the energy is stored as internal potential energy in the melted or evaporated state of the substance

Therefore, we have;

If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This will be represented by a 1. plateau where the temperature stays constant on a heating curve, which occur at the 2. melting and 3. boiling points of the substance.

Answer:

A

Explanation:

It’s a because a electrolyte reproduces

Answer:

A

Explanation:

Answer:

[tex]\mu=0.06[/tex]

Explanation:

Given that,

Mass of a block, m = 2 kg

Velocity of the block, v = 6 m/s

It stopped in 10 s

We need to find the coefficient of friction.

The frictional force is balanced by the opposing force such that,

[tex]\mu mg=ma\\\\\mu=\dfrac{a}{g}[/tex]

Where

a is acceleration, a = 6/10 = 0.6 m/s

So,

[tex]\mu=\dfrac{0.6}{10}\\\\\mu=0.06[/tex]

So, the coefficient of friction is equal to 0.06.

Answer:

I think the answer is C/ Tell me If you got it right

Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass

Answer:

the noun of deposition is the action of deposing someone, especially a monarch.

A "screen" or even just a set of parallel bars are highly reflective to electromagnetic waves as long as the open spaces are small compared to the wavelengths.

"Grid" dishes work fine ... with less weight and less wind resistance ... for frequencies below about 3 GHz. (Wavelengths of at least 10 cm.)

(I even worked on a microwave system in South America where huge grid dishes were used on a 90-mile link.)

Answer:

let the voltages of the cell be V and R the equivalent resistance of the circuit.

I1=RV∵ only one cell connected  ;

I2=RV+V=R2V∵ two cells connected in series  ;

I3=RV+RV=R2V∵ two cells connected in parallel ⇒ total current is same as sum of the currents due to each.

Now , 

LHS = 3I3I2=3R2VR2V=3(R24V2) 

RHS = 2I3(I1+I2)=2R2V(RV+R2V)=2R2VR3V=3R2therefore, LHS = RHS   

Answer:

making it easier to perform a cost-benefit analysis of a decision.reducing the marginal benefits for a particular choice.

Explanation:

Answer: Making certain choices more beneficial than others.

Explanation: Just took test - Apx

Answer:

there is no picture :o?

Explanation:

:oo

Answer:

Resistance = 15 Ohms

Explanation:

Given the following data;

Emf voltage = 18 V

Internal resistance = 3 Ohms

Potential difference = 15V

To find the resistance of the wire;

First of all, we would determine the current flowing through the wire.

Mathematically, the terminal potential difference is given by the formula;

V = E - IR

Where;

V is the terminal potential difference.

E is the electromotive force (emf).

I is the current.

R is the internal resistance.

15 = 18 - I*3

15 = 18 - 3I

3I = 18 - 15

3I = 3

I = 1 Amperes

Next, we find the resistance of the wire;

Voltage = current * resistance

Substituting into the formula, we have;

15 = 1 * resistance

Resistance = 15/1

Resistance = 15 Ohms

Answer:

The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.

Answer:

mass of block=2.7 gm

Explanation:

concept: Density=mass/volume

given:ρ=2700 kg/m^3 and v=250 cm^3 (in cm^3 not in m^3)

=> v= convert cm^3 to m^3

there fore= 1 cm^3=1 cm*1 cm*1 cm

i.e 1 cm^3=1/100*1/00*1/100 m^3 => 1 cm^3=1/1000000 m^3

ρ=m/v

=>mass=ρ*volume

=>mass=2700*1/10^-6

=>mass=2.7*10^-3 kg =>2.7 gm

Answer:

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Explanation:

Given the following data;

Original volume = V

New volume = V'

Original temperature = T

New temperature = T'

To write an expression for Charles's law;

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Answer:

the magnitude of the net force acting on the kayak is 14.77 N.

Explanation:

Given;

initial velocity of the kayak, u = 0

final velocity of the kayak, v = 0.509 m/s

distance traveled by the kayak, d = 0.555 m

combined mass of the person and kayak, m = 63.4 kg

Determine the acceleration of the kayak by using the following kinematic equation;

v² = u² + 2ad

(0.509)² = 0  +  (2 x 0.555)a

0.259081 = 1.11a

a = 0.259081 / 1.11

a = 0.233 m/s²

The magnitude of the net force acting on the kayak is calculated by using Newton's second law of motion;

F = ma

F = 63.4 x 0.233

F = 14.77 N

Therefore, the magnitude of the net force acting on the kayak is 14.77 N.