1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kolezko [41]
3 years ago
11

When Danny Diver who weighs 500 N steps off a diving board 10 m above the water, he hits the water with kinetic energy of

Physics
1 answer:
Andreas93 [3]3 years ago
8 0

Answer:

5000 J

Explanation:

Given that,

Weight of Danny Diver, F = 500 N

He steps off a diving board 10 m above the water

We need to find the kinetic energy of the water with which it hits. Let its is K. It is given by :

E = mgh

Where g is acceleration due to gravity

E=500\ N\times 10\ m\\\\=5000\ J

So, he hits the water with kinetic energy of 5000 J.

You might be interested in
A uniform 2.50m ladder of mass 7.30kg is leaning against a vertical wall while making an angle of 51.0degree with the floor. A w
Zigmanuir [339]

Answer:

19.95 J

Explanation:

The center of mass of the ladder is initially at a height of:

h_1=\frac{L}{2}sin\theta

The center of mass of the ladder ends at a height of:

h_2= \frac{L}{2}sin90 =L/2

So, the work done is equal to the change in potential energy which is:

W = PE = mg(h_2-h_1)

now h_2-h_1= 1-sin\theta

therefore

W = [mgL/2]×[1 - sin(theta)]

W = [(7.30)(9.81)(2.50)/2]×[1-sin(51°)]

solving this we get

W = 19.95 J

8 0
3 years ago
Which best describes the surface of a concave mirror? It is flat. It is textured. It curves outward. It curves inward.
Sonja [21]

The concave mirror is a spherical-shaped mirror that has an inner curved surface. Hence, option (4) is correct.

What is a concave mirror?

The concave mirrors are spherical-shaped mirrors that are painted on the outward surface. It is also known as the converging mirror, having the recessed inner reflecting surface.

  • The concave mirrors are generally used for the purpose to focus the light. For that, they might have a reflecting surface, curved inwards, and the reflection of light is limited to the single focal point.
  • The reflecting surface of the concave mirror has its vertex or midpoint lying farther away from the objects than the edges.

Thus, we can conclude that the surface of the concave mirror is curved inward. Hence, option (4) is correct.

Learn more about the concave mirror here:

brainly.com/question/13300307

8 0
2 years ago
What happens to acceleration if forces are balanced
Vikentia [17]

Answer:

No acceleration.

Explanation:

If the forces are Balanced it means they are in equilibrium and there will be  no net force, therefore the object will not accelerate and the velocity will remain constant.

5 0
3 years ago
Read 2 more answers
"The wave" is a particular type of pulse that can
scoray [572]

Answer:

t = 36π seconds

Explanation:

For resolving this problem, we are going to consider a representative stadium of the United States. The Mercedes-Benz Stadium located in Atlanta, Georgia has an average radius of 90 m.

Then, its circumference measures:

L = 2πr

L = 2π(90)

L = 180π m

First, we estimate the wave's velocity: the average width of an person is 0.5 m, then the velocity is:

v = x/t

                 Where x: person's width

                             t: time

v = 0.5/0.1 = 5 m/s

The time required for the pulse to make one circuit around the stadium is:

t = x/v = 180π/5 = 36π seconds

4 0
3 years ago
What is a Super Massive Black Hole?
Serggg [28]

Answer:

I dont really know much but i know that it swallow anything it comes across in space.

4 0
3 years ago
Other questions:
  • What is the name of the effect that causes water to travel at an angle to trade winds?
    12·1 answer
  • Assume that the same amount of current passes through the electromagnets shown. Identify which electromagnet is stronger than th
    7·2 answers
  • A baseball with a mass of 142 grams is thrown across a field. It accelerates at a rate of 8 m/s^2. What is the force acting on t
    13·1 answer
  • Astronomers observe two separate solar systems each consisting of a planet orbiting a sun. The two orbits are circular and have
    14·1 answer
  • A 50 Ohm resistance causes a current of 5 milliamps to flow through a circuit connected to a battery. What is the power in the c
    6·2 answers
  • What is center of mass?
    14·1 answer
  • If i click on a mouse does that show energy transfer?
    14·2 answers
  • Which excerpt from The Number Devil best conveys that the author's purpose for writing is to entertain?
    9·2 answers
  • HELP ME ASAP PLZ!
    11·1 answer
  • What is the wavelength associated with 0.113kg ball traveling with velocity of 43 m/s?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!