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
USPshnik [31]
4 years ago
14

I NEED HELP WITH NUMBER 7 I WILL GIVE U BRAINLIEST

Physics
1 answer:
grigory [225]4 years ago
3 0

Answer:

the blue one

Explanation:

You might be interested in
What is the planet that scientists are exploring now?​
mina [271]

Answer:

Mars

Explanation:

In the 1960s, humans set out to discover what the red planet has to teach us. Now, NASA is hoping to land the first humans on Mars by the 2030s. Mars has captivated humans since we first set eyes on it as a star-like object in the night sky.

good luck

please mark me as a brainliest

5 0
3 years ago
Explain the difference between impulse and impulsive force?
ExtremeBDS [4]
An impulsive force is a force that is acting only during a short time, I mean, for an instant. Impulse is a physics magnitude define by the product of the impulsive force and the time that it was acting.

Is there any mistake in my English? Please, let me know.
7 0
3 years ago
The Greek scientist who concluded that the sun is the center of the solar system, and that the Earth revolves around the Sun, wa
statuscvo [17]

Answer:

<em>a. Aristarchus</em> was the Greek scientist who concluded that the sun is the centre of the solar system, and that the Earth revolves around the Sun

Explanation:

<em>Aristarchus</em> was a Greek scientist who studied astronomy. He concluded that the sun is the centre of the solar system, and that the Earth revolves around the Sun (that it was Heliocentric).

6 0
4 years ago
A flat roof is very susceptible to wind damage during a thunderstorm and/or tornado. If a flat roof has an area of 500 m2 and wi
Evgesh-ka [11]

Answer: The magnitude of the force exerted on the roof is 490522.5 N.

Explanation:

The given data is as follows.

Below the roof, v_{1} = 0 m/s

At top of the roof, v_{2} = 39 m/s

We assume that P_{1} is the pressure at lower surface of the roof and P_{2} be the pressure at upper surface of the roof.

Now, according to Bernoulli's theorem,

P_{1} + 0.5 \times \rho \times v^{2}_{1} = P_{2} \times 0.5 \rho \times v^{2}_{2}

P_{1} - P_{2} = 0.5 \times \rho \times (v^{2}_{2} - v^{2}_{1})

             = 0.5 \times 1.29 \times [(39)^{2} - (0)^{2}]

             = 0.645 \times 1521

             = 981.045 Pa

Formula for net upward force of air exerted on the roof is as follows.

          F = (P_{1} - P_{2})A

             = 981.045 \times 500

             = 490522.5 N

Therefore, we can conclude that the magnitude of the force exerted on the roof is 490522.5 N.

5 0
3 years ago
Real-world efficiencies are generally very high, in the 90 percent range. Please select the best answer from the choices provide
Vesna [10]

Answer:

i think it truth

Explanation:

4 0
4 years ago
Other questions:
  • What happens when charged object is brought near uncharged object?<br> Attract or Repel ?
    14·2 answers
  • Charlie throws a ball up into the air. While the ball is airborne, which is the greatest force acting on the ball to slow it dow
    7·2 answers
  • g If the interaction of a particle with its environment restricts the particle to a finite region of space, the result is the qu
    14·1 answer
  • The synthesis of nitrogen trihydride from nitrogen gas and hydrogen gas is shown by which balanced chemical equation?
    15·2 answers
  • Which of the following statements are true? Check all that apply. Check all that apply. The gravitational force between two obje
    7·2 answers
  • A 1200 kg car traveling east at 4.5 m/s crashes into the side of a 2100 kg truck that is not moving. During the collision, the v
    14·1 answer
  • What is the power of a motor that transfers 450 J of energy in 9s?
    5·1 answer
  • Does inertia depend on mass?​
    10·2 answers
  • Q4. Olly Murs pushes a car uphill. He pushes
    8·1 answer
  • Assume that each cubic centimeter of water has a mass of exactly 1.00 g. what is the mass of one cubic meter of water in kilogra
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!