3 A ball is thrown haizonatally
oft a 7m building at omis
A man wants to catch the
ball in a basket 1sm of the
ground How ker away from the
building should he stand with
the basket
?

Answer:

0.375 m/s

Explanation:

The average speed of an object or a body is given by:

                      total distance traveled/total time taken

In the case of the teacher who walked back and fort:

Total distance traveled = 4.0 + 2.0 + 3 = 9 meters

Total time taken= 24 s

Hence,

Average speed of the teacher = 9/24

                             = 0.375 m/s

Answer:

171.5Watts

Explanation:

Given parameters:

Mass  = 5kg

Distance  = 28m

Time  = 8s

Unknown:

Power = ?

Solution:

Power is the rate at which work is done;

       Power  = [tex]\frac{work done }{time taken}[/tex]

Work done  = force x distance = mg x d =

  m is the mass

   g is the acceleration due to gravity

   d is the distance

  Work done  = 5 x 9.8 x 28 = 1372J

     Power = [tex]\frac{1372}{8}[/tex]   = 171.5Watts

Answer:

The telescope is adjusted to receive parallel rays by turning it towards a distant object and adjusting the distance between the objective lens and the eyepiece to get a clear image on the cross wire.

The telescope is turned towards a far-off object, and the distance between the objective lens and the eyepiece is adjusted to produce a clear image on the cross wire.

A telescope is a tool for creating enlarged views of far-off things. The telescope is without a doubt the most significant research tool in astronomy. It offers a way to gather and examine radiation coming from astronomical objects, even those at the edge of the cosmos.

When Galileo used the telescope to investigate alien bodies in the early 17th century, he revolutionized astronomy.

Magnification tools had never been employed for this purpose before until that point. The distance between the objective lens and the eyepiece is adjusted to provide a crisp image on the cross wire as the telescope is pointed towards a distant object.

Learn more about telescope here:

https://brainly.com/question/556195

#SPJ2

Answer:

C. all of the above.

Explanation:

up at the top it says solar power bank.

in the boxes below it says LED flashlight and solar energy.

it is all of the above.

Inertia is a force which brings all objects to a rest position. Fast-moving objects have more inertia than slow-moving objects. False - The speed of an object has no impact upon the amount of inertia that it has. Mostly True - Two objects of the same mass can weigh differently if they are located in different locations.

I don't know if this will help

Answer:

 v = 344.1 m / s    

 d = 1720.5 m

Explanation:

For this problem we must calculate the speed of sound in air at 22ºC

           v = 331 RA (1+ T / 273)

we calculate

           v = 331 RA (1 + 22/273)

           v = 344.1 m / s

the speed of the wave is constant,

           v = d / t

           d = v t

we calculate

           d = 344.1   5

           d = 1720.5 m

Answer:

False

Explanation:

The softball is bigger, but it is lighter, which means it has a better chance of getting farther way faster with a lighter amount of force. On the other hand, the golfball is heavier, which would take more force to move it a certain distance.

Answer: false

Explanation:

• Defines what the “natural” states of motion are, either at rest and constant

velocity. In essence, the first law sets up the basis to define what accelerated

motion is, which we address with Newton’s 2nd law.

• Defines the type of coordinate systems so that Newton’s laws are valid. These

coordinate systems are called inertial reference frames.

Answer:

The truck

Explanation:

Kinetic energy is directly proportional to mass. Since the truck has more mass, it will have more energy.

I think your answer is b.

Answer:

P = 101292.8

Explanation:

Use

Pressure p = H D g

H = height ( in metric)

D = density ( in metric )

g = gravity

So

H = 76 cm = 0.76 m

D = 13600 kg/m3

And g = 9.8

P = HDg

= 0.76× 13600×9.8

= 101292.8 pascal

Or = 1.012928 × 10^5

Answer:

sudeep is correct hope it's help you have a great day ☺☺keep smiling be happy stay safe

Answer:

[tex]v_x=10.72\ m/s[/tex]

Explanation:

Projectile Motion

It's the type of motion that experiences an object launched near the Earth's surface and moves along a curved path exclusively under the action of gravity.

Being vo the initial speed of the object, and θ the initial launch angle, the two components of the velocity are given by:

[tex]v_x=v_o\cos\theta[/tex]

[tex]v_y=v_o\sin\theta-g.t[/tex]

The soccer ball is kicked at an angle of 40° with an initial speed of vo=14 m/s.

The horizontal component is:

[tex]v_x=14\cos 40^\circ[/tex]

Calculating:

[tex]v_x=14\cdot 0.766[/tex]

[tex]\mathbf{v_x=10.72\ m/s}[/tex]

Answer:

1. The horizontal component of the velocity is approximately 271.89 m/s

The vertical component of the velocity is approximately 126.79 m/s

2. The time the bullet spends in the air is approximately 25.85 seconds

3. The maximum height reached by the bullet is approximately 819.35 meters

4. The horizontal distance is approximately 7028.36 meters

Explanation:

The initial velocity of the bullet = 300 m/s

The angle at which the bullet was fired, θ = 25° from the horizontal

1. The horizontal component of the velocity vₓ = The component of the velocity in the x-direction

vₓ = v × cos(θ)

Substituting gives;

vₓ = 300 × cos(25°) ≈ 271.89 m/s

The vertical component of the velocity [tex]u_y[/tex] = The component of the velocity in the y-direction

[tex]v_y[/tex] = v × sin(θ)

Substituting gives;

[tex]u_y[/tex] = 300 × sin(25°) ≈ 126.79 m/s

2. The time the bullet takes to maximum height, t = 1/2 × The time the bullet spends in the air

The following is the relevant kinematic equation for the vertical motion of the bullet;

v = u - g × t

Where;

[tex]v_y[/tex] = The final velocity vertical velocity = (0 at maximum height)

[tex]u_y[/tex] = The initial vertical velocity ≈ 126.79 m/s

g = The acceleration due to gravity = 9.81 m/s²

t = The time in flight of the bullet

Substituting gives;

0 = 126.79 - 9.81 × t

t ≈ 126.79/9.81 ≈ 12.924 s

The time the bullet spends in the air = 2 × The time the bullet takes to maximum height

∴ The time the bullet spends in the air ≈ 2 × 12.924 ≈ 25.85

The time the bullet spends in the air ≈ 25.85 seconds

3. The maximum height reached is given from the following kinematic equation;

[tex]u_y[/tex]² = 2 × g × h

Where;

h = The maximum height reached by the bullet

∴ h = [tex]u_y[/tex]²/(2 × g)

h = 126.79²/(2 × 9.81) = 819.35

The maximum height reached by the bullet = h = 819.35 meters

4. The horizontal distance travelled by the bullet = Horizontal component of the velocity of the bullet × The time the bullet spends in the air

∴ The horizontal distance travelled by the bullet = 271.89 × 25.85 ≈ 7028.36

The horizontal distance travelled by the bullet ≈ 7028.36 meters.

Answer:

The answer is Producer. Hope this helps!

Answer:

Producer

Explanation:

They keep the food chain stable... without producers there wouldnt be and animals. They are the key to the food chain.

Answer:

from the sea towards the land

Answer:

sea to land

Explanation:

because the tide is coming in

Answer:

1.

A:Time (minutes)

B: Temp(degrees c)

2. Downward trend (temperature goes down as time goes on )

3.

A: not sure

B: temperature

4.the temperature is going down

5. Closes off any open airways

Answer:

No, because objects have the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities. The average velocity of an object moving in a constant direction is calculated with the formula: velocity = distance/time.

Explanation:

Look at my comment if you are still confused. I think this article will help with acceleration and velocity.

Answer:

Im pretty sure 1 is gravity, 2 is force

Explanation:

Answer:

chemical change

Explanation:

Answer:

The centripetal acceleration acting on the ball is 10.24 m/s²

Explanation:

Given;

mass of the ball, m = 3 kg

radius of the swing arm, r = 1 m

speed of the ball, v = 3.2 m/s

centripetal acceleration is given by;

a = v² / r

a = (3.2)² / 1

a = 10.24 m/s²

Therefore, the centripetal acceleration acting on the ball is 10.24 m/s²

Answer:

Because the hiker walked directly west and then directly north the two legs of the hike forms a right triangle. Therefore we can use the Pythagorean Theorem to solve this problem.

c=5

The hiker is 5km from camp and should head in a generally south-east direction

i hope it helped thanks

Answer:

When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall. (i) Name the force exerted ...

Answer:

0.7kg

Explanation:

Given parameters:

Force on the rock  = 8.68N

Acceleration  = 12.4m/s²

Unknown:

Mass of the rock  = ?

Solution:

From newton's second law of motion, the net force on a body is the product of mass and acceleration

  Net force  = mass x acceleration

Now insert the parameters and solve the problem;

         8.68  = mass x 12.4

          mass = [tex]\frac{8.68}{12.4}[/tex]  = 0.7kg

Answer:

See explanation

Explanation:

Nuclear energy refers to energy trapped in the nucleus of atoms. Nuclear energy holds the greatest promise for large scale electricity generation. For instance, the amount of energy released by a given mass of uranium is 2.5 million times the energy released by combustion of an equal mass of carbon.One gram of uranium produces the same energy as 1 ton of coal, 17000 cubic feet of natural gas, 5000 pounds of wood and 149 gallons of oil.

Nuclear energy does not pollute the atmosphere as fossil fuels do. However, the challenges of effective control of the nuclear reactor and disposal of radioactive waste still remain a serious concern.

However, exploitation of nuclear energy as a source of electricity remain expensive and it is not quite easy to set up a nuclear power plant. Not many countries can afford to pay for the services of experts who operate nuclear energy plants talk more of providing the required equipment.

There is some evidence that regular static stretching outside periods of exercise may increase power and speed, and reduce injury. The best time to stretch is when the muscles are warm and pliable. This could be during a yoga or pilates class, or just after exercising.

Answer:

C. 6,000

Explanation:

Answer:

1. Attacking the person

2. Stress fractures

Explanation:

If this helps this is on my opinion and I need do my best to help you:)

Answer:

[tex]\boxed{\text{\sf \Large 50 N}}[/tex]

Explanation:

Sum of the vertical forces is zero

F₁ + F₂ - Z = 0

Z is negative since Z acts in the opposite direction from F₁ and F₂

30 + 20 - Z = 0

Z = 50

Answer:f^n=m(a+g)

Explanation:khan academy said