A gymnast performs an amazing flip! He lands on the floor and his feet put a force downwards on the floor. Newton’s Third Law reaction force is:

(A)The weight of gravity on the gymnast
(B)The weight of gravity on the floor
(C)The force of the floor upwards on his feet
(D)The force of the floor downwards on his feet

Answer: 0.24 atm

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.  

The equation given by this law is:

[tex]P_1V_1=P_2V_2[/tex]

where,

[tex]P_1[/tex] = initial pressure of gas = 1.0 atm

[tex]V_1[/tex] =  initial volume of gas = [tex]0.80 m^3[/tex]

[tex]P_2[/tex] = final pressure of gas= ?

[tex]V_2[/tex] = final volume of gas = [tex]3.32m^3[/tex]

Putting values in above equation, we get:

[tex]1.0\times 0.80m^3=P_2\times 3.32m^3[/tex]

[tex]P_2=0.24atm[/tex]

Thus the atmospheric pressure of the gas is 0.24 atm

Answer:

The ratio of lengths of the two mathematical pendulums is 9:4.

Explanation:

It is given that,

The ratio of periods of two pendulums is 1.5

Let the lengths be L₁ and L₂.

The time period of a simple pendulum is given by :

[tex]T=2\pi \sqrt{\dfrac{l}{g}}[/tex]

or

[tex]T^2=4\pi^2\dfrac{l}{g}\\\\l=\dfrac{T^2g}{4\pi^2}[/tex]

Where

l is length of the pendulum

[tex]l\propto T^2[/tex]

or

[tex]\dfrac{l_1}{l_2}=(\dfrac{T_1}{T_2})^2[/tex] ....(1)

ATQ,

[tex]\dfrac{T_1}{T_2}=1.5[/tex]

Put in equation (1)

[tex]\dfrac{l_1}{l_2}=(1.5)^2\\\\=\dfrac{9}{4}[/tex]

So, the ratio of lengths of the two mathematical pendulums is 9:4.

Answer:

i think its b

Explanation:

its been awhile since I've worked on Newton's first law

Answer:

The answer is 20 miles

Explanation:

You would use a^2+b^2=c^2 to get the displacement.

So 16^2+12^2=c^2

400=c^2

c=20

Answer:

B. o J

hope it helps......

Answer:

A. 4800J

Explanation:

use the formula of work u also can get answer

Answer:

it's answer is Compound chemical energy

hope it helps you

ice hokey, indoor soccer

Answer:

The circumference of the bromine atom is 628 pm

Explanation:

The formula for the circumference of a circle is 2πr.

Where π is 3.14 and r is the radius of the circle.

Since atoms have a circular shape. The formula above can be used to determine the circumference of an atom (bromine atom in particular).

circumference of the bromine atom is 2πr (where r is 100 pm)

2 × 3.14 × 100 = 628 pm.

The circumference of the bromine atom is 628 pm

Answer:

hope it helps......

Explanation:

Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.

Shockers acts as a shock absorber in the vehicle making the ride comfortable. When vehicle goes on rough road then it gets shocks from the road deformities the springs present in the shockers provide counter force and thus making the vehicle stable ride without shock.

[I copied this from the internet, but hope it helps!]

Explanation:

In Asexual reproduction , part of parent plant is detached and grows to become a complete plant. In this process plant produced is generally identical to the its parent plant. It has ALL the same characteristics that the parent plant has. However, this is not true in case of sexual reproduction of plants.

Answer:

an elastic wave in the earth produced by an earthquake or other means

Explanation:

Answer:

They carry energy

Explanation:

Answer:

26

Explanation:

Answer:

A

Explanation:

because newton's second law states that if a resultant force acts on an object then, it will accelerate in the direction of the resultant force

Answer:

ttrftyrdy

Explanation:

tytrterte

Answer:

B= nimbus clouds

Answer:

B= nimbus clouds

Answer:

velocity of all electromagnetic waves are

[tex] \huge3 \times {10}^{8} m {s}^{ - 1} [/tex]

So, the ratio is equal to 1.

Answer:

1) A = lost volts, B = lower, C = a small pressure, D, = Newtons kg, E = Modulation.

2) A = True(?), B = true, C = True, D = True, E = not sure sorry.

Explanation:

Answer:

The answer for the first question is: 3,000,000 N/m

The answer for the second question is: If the question was, "Which of the following is the best example of kinetic energy being transformed into potential energy?" then the answer is winding the spring on a toy car

Explanation:

For the first question: I have no explanation, I just got it right on my test so I thought i'd help you out.

For the second question: (i'll try to explain the best I can).

Kinetic energy = energy in motion

Potential energy = stored energy

so when winding the spring of a car you are using energy in motion (kinetic energy) to create stored energy (potential energy) that will be used to move the car. So it goes something like:

kinetic energy > potential energy > kinetic energy

Answer:

Following are the solution to the given question:

Explanation:

Please find the complete question in the attached file.

[tex]a_x = 0\\\\a_y = -g = -9.81\ \ \frac{m}{s^2} \\\\v_{iy} = 0 \\\\y = v_{iy} \times t+ \frac{1}{2ay} \times t^2 \\\\ 15 = \frac{1}{2} \times 9.8 \times t^2 \\\\t = \sqrt{(2 \times \frac{15}{9.8})} \\\\[/tex]

  [tex]= 1.75 \ sec \\\\[/tex]

Distance:

[tex]x = v_{ix} \times t \\\\[/tex]

  [tex]= 8 \times 1.75\\\\= 14 m[/tex]

Using the concept of motion, the answers to the question posed on the motion of a dropped ball are :

The vertical component of acceleration is denoted as [tex]a_{y} [/tex] :

The gravitational force acting on the ball in the downward direction has an acceleration of - 9.8 m/s². Hence,

Gravitational force only acts downwards along the vertical, hence, horizontal component of acceleration will be Zero.

then the vertical component of x, will be 0

The initial vertical velocity ; [tex]V_{iy} is Zero [/tex] :

The time taken :

S = 0.5gt² ; S = distance = 15 meters ; g = - 9.81

15 = 0.5(9.8)t²

15 = 4.9t²

t² = (15 ÷ 4.9)

t² = 3.061

t = √3.061

t = 1.75 seconds

Landing Distance from building :

Horizontal speed × time taken

[tex]V_{ix} \times 1.75 [/tex]

[tex]8 \times 1.75 = 14 meters [/tex]

Therefore, the ball landed 14 meters away from the building.

Learn more : https://brainly.com/question/13981527

Answer:

Yes the valency of oxygen is 2

Answer:

#1. decrease

#2. increases

#3. increases

#4.increases

Explanation:

Answer:

90.44 m

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 30 m/s

Angle of projection (θ) = 40°

Acceleration due to gravity (g) = 9.8 m/s²

Range (R) =?

The range of the ball can be obtained as follow:

R = u² Sine 2θ / g

R = 30² Sine (2×40) / 9.8

R = 900 Sine 80 / 9.8

R = 900 × 0.9848 / 9.8

R = 886.32 / 9.8

R = 90.44 m

Therefore, the range of the tennis ball is 90.44 m

Answer:

Explanation:

Average velocity is expressed as;

Average velocity = Displacement/Time

Get the displacement

If a pizza delivery car, parked 200 m East of a restaurant and moves to a position 600 m West

The displacement = 600 -200

Displacement = 400m

Time = 18s

Substitute and get the velocity;

Average velocity = 400/18

Average velocity = 22.2m/s

Hence the average velocity of the delivery car in moving to its new position is 22.2m/s

Answer:

Im sorry i can't read it is to small

Answer:

aluminum foil and cotton

Explanation:

It was found that the aluminum foil and cotton were the best insulators for keeping the water cold while the Styrofoam sheets and the bubble wrap were the worst two insulators for keeping the water cold.

Answer:

(i) Effort = 250 N

(ii) Velocity ratio = 6.667

(iii) work output = 20 000 Nm

Explanation:

Given: efficiency = 60%, mechanical advantage = 4.

(i) Mechanical advantage = [tex]\frac{Load}{effort}[/tex]

Load = 1000 N

⇒ Effort = [tex]\frac{Load}{Mechanical advantage}[/tex]

             = [tex]\frac{1000}{4}[/tex]

             = 250 N

Effort = 250 N

(ii) Efficiency = [tex]\frac{Mechanical advantage}{velocity ratio}[/tex] x 100%

Velocity ratio = [tex]\frac{Mechanical advantage}{Efficiency}[/tex] x 100%

                      = [tex]\frac{4}{60}[/tex] x 100

                      = 6.667

Velocity ratio = 6.667

(iii) Work output = Load x distance moved by load

                         = 1000 x 20

                         = 20 000

Work output = 20 000 Nm

Answers:

The transportation industry is no stranger to the manipulation of everyday physics. Cars and trains utilize the wheel, which provides a smooth, steady motion.

The ears hear sounds which occur through the movement of air molecules, and the chemistry that drives all of biology depends on the physics of energy and molecules. Every day, for example, plants absorb sunlight, water, and carbon dioxide, creating glucose and releasing oxygen as a byproduct.

Brainlist pls!