Using echos to find an object

Answers

Answer 1

Answer: Using echoes to find and object is called echo location.

Answer 2

Answer: The answer is Echolocation

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NEED ASAP PLEASE !!! Suppose that a block is pulled 16 meters across a floor. What amount of work is done if the force used to drag the block is 22 N?

A. 200 J
B. 330 J
C. 352 J
D. 220 J

Answers

Answer: Option (C) is the correct answer.

Explanation:

Work is defined as the energy required when force is applied in a certain direction.

The expression for work, force and distance is as follows.

W = F × d

where, W = work

F = force

d = distance

It is given that force applied to drag the box is 22 N and distance is 16 meters. Therefore, calculate work done as follows.

W = F × d

= 22 N × 16 meters

= 352 Nm (1 Newton meter = 1 joule)

or, W = 352 J

Thus, we can conclude that amount of work done is 352 J.

work = force x distance
22N x 16m = 352 J

Surgeons, engineers, carpenters, plumbers, electricians, and furniture movers all rely on trained experience with visual thinking. Describe how one of these tradespeople or someone in another occupation uses visual thinking in his or her work.

Answers

Answer:

by drawing in their minds pictures of the events.

Explanation:

A surgeon for example can imagine the size, length, width that need to use or cut in a body if he/she can figure out tridimentional models, in this way if is going to connect a heart pump can imagine how is going to be.

An engineer, can imagine how is going to be a new building. He can visualize where to put some electric plug depending the needs and the capacity of the building.

In this way all the projects that they have in their minds can put together the different parts by a drawing in their heads.

Answer:

by drwaing in their minds pictures of the events

Explanation:

On a highway, a car is driven 80. kilometersduring the first 1.00 hour of travel,
50. kilometers during the next 0.50 hour, and
40. kilometers in the final 0.50 hour. What is the
car’s average speed for the entire trip?
(1) 45 km/h (3) 85 km/h
(2) 60. km/h (4) 170 km/h

Answers

The average speed of the car for the entire trip can be calculate by using:

$v=(S)/(t)$

where S is the total distance covered by the car, and t is the total time taken.

The total distance travelled by the car is:

$S=80 km+50 km+40 km=170 km$

while the total time taken is:

$t=1.00 h+0.50 h+0.50 h=2.00 h$

so, the average speed of the car is:

$v=(S)/(t)=(170 km)/(2.00 h)=85 km/h$

so, the correct answer is (3) 85 km/h.

The average speed of the car for entire trip is $\boxed{85\text{ km/h}}$ .

Further Explanation:

Speed is the measure of a quantity of an object the tells how fast the object is moving in the other words we can define the speed that it is the distance covered by an body divided by the time taken to cover that distance. It is a quantity with only magnitude so it is a scalar quantity.

The average speed is defined as the sum of all the distance traveled by the body divided by the sum of time taken to travel that distance.

Given:

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ .

The distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ .

The distance travel by the car is $40\text{ km}$ for .

$0.50\text{ hours}$ .

Concept:

The expression for the average can be written as:

S = $\frac{{{\text{sum of distances }}}}{{{\text{sum of time}}}}$ …… (1)

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ , distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ and distance travel by the car is $40\text{ km}$ for $0.50\text{ hours}$ .

The sum of the distance is:

$\begin{aligned}D&=80{\text{ km}}+{\text{50 km}}+40{\text{ km}}\n&=170{\text{ km}}\end{aligned}$

The sum of time taken to travel the distance is:

$\begin{aligned}t&=1.00{\text{ h}} + 0.50{\text{ h}} + 0.50{\text{ h}}\n&=2.00{\text{ h}}\end{aligned}$

Substitute $170\text{ km}$ for total distance and $2.00\text{ h}$ for total time in equation (1).

$\begin{aligned}S&=\frac{{{\text{170 km}}}}{{2.00{\text{ h}}}}\n&=85{\text{ km/h}}\end{aligned}$

Therefore, the average speed of the car for entire trip is $\boxed{85\text{ km/h}}$ .

Learn more:

1. Find the net force. https://brainly.in/question/8668644

2. Find the velocity. https://brainly.in/question/4502003

3. Calculate average speed brainly.com/question/11597590

Answer Details:

Grade: Middle school

Subject: Physics

Chapter: Kinematics

Keywords:

Highway, car, driven, 80 km, 1.00 hour, 1.00 hr, 1.00 h, 50 km, 0.50 hour, 0.50 hr, 0.50 h, 50 km, average speed, entire, trip, 85 km/hr.

A man pushes on a box at an angle of 30.0° with a force of 20.0 N and the box moves across the floor. Which of the following component of the force do you use to calculate work?

Answers

Not sure what the given options are, but the answer is the horizontal component. This is given by Force x cos(angle), or Fcos(θ), where θ is the angle. In this case that would be 20cos(30) = 17.32N

A small package is attached to a helium-filled balloon rising at 2 m/s. The package drops from the balloon when it is 14 meters above the ground. What is the velocity of the package just before it hits the ground?

Answers

The velocity of the package just before it hits the ground is 16.7 m/s.

What is velocity?

The change of distance with respect to time is defined as speed. Speed is a scalar quantity. It is a time-based component. Its unit is m/sec.

Initial velocity(u)=2 m/s

V(velocity of hitting)=?

S(distance travelled)= 14 meters

The velocity of the package just before it hits the ground is found as;

From the Newton's third equation of motion;

v²=u²+2as.

v²=(-2)²+2(9.81)(14)

v=16.7 m/s

Hence,the velocity of the package just before it hits the ground is 16.7 m/s.

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

brainly.com/question/862972

#SPJ2

I would assume air resistance is negligible and so the acceleration of the package would be approximately 9.81 m/s².

Taking downwards as positive, use v²=u²+2as.
v²=(-2)²+2(9.81)(14)
v=16.7 m/s

If a plane can travel 450 miles per hour with the wind and 410 miles per hour against the wind, find the speed of the plane without a wind and speed of the wind. I need help with this one :(

Answers

The speed of the plane without a wind is 430 miles/hr and speed of the wind is 20 miles/hr.

What is Speed ?

Speed is a rate of change of distance with respect to time. i.e. v=dx÷dt. Speed can also be defined as distance over time

i.e. speed= distance ÷ time

it is denoted by v and its SI unit is m/s. it is a scalar quantity.

Speed shows how much distance can be traveled in unit time.

To find dimension for speed is, from formula

Speed = Distance ÷ Time

Dimension for distance is [L¹] ,

Dimension for Time is [T¹],

Dividing dimension of distance by dimension of time gives,

{L¹] ÷ [T¹] = [L¹T⁻¹]

Dimension for speed is [L¹T⁻¹].

Consider,

Speed of the plane = v

Speed of the wind = u

Speed of the wind in the direction of wind is,

v + u = 450 miles/hr.....1

Speed of the wind in the opposite direction of wind is,

v - u = 410 miles/hr.....2

Adding equation 1 and 2

2v = 860

v = 430 miles/hr

Subtracting equation 1 and 2

2u = 40

u = 20 miles/hr

Hence the speed of the plane without a wind is 430 miles/hr and speed of the wind is 20 miles/hr.

To know more about Speed :

brainly.com/question/28224010

#SPJ2.

the plane is 430 and the wind it 20miles

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