How much physical activity do adults need?

Answers

Answer 1
Answer: Aerobic activity. Get at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous aerobic activity a week, or a combination of moderate and vigorous activity.
Answer 2
Answer: 30? Physical activity

Related Questions

What type of lens is used to make objects appear smaller and clearer convex or concave?
What is a barrier island? A. A ridge of sand that forms between the mainland and an island connecting the island to the mainland B. A long ridge of sediment that forms when a spit closes off a bay C. A narrow bank of sand that projects into the water from a bend in the coastline D. A long ridge of sediment deposited by the longshore current and separated from the mainland
Voltage sources are used to sustain a. the flow of protons b. chemical reactions c. resistance d. the movement of electric charge
The ozone layer _____. is part of the troposphere is used to send radio signals protects the earth from UV radiation is made of charged ions and free electrons
The coordinates of a bird flying in the xy-plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2.part a:Calculate the velocity vector of the bird as a function of time. Give your answer as a pair of components separated by a comma. For example, if you think the xcomponent is 3 and the y component is 4, then you should enter 3,4.part b:Calculate the acceleration vector of the bird as a function of time. Give your answer as a pair of components separated by a comma. For example, if you think the x component is 3 and the y component is 4, then you should enter 3,4

Mass is measured using _____.scales
a triple beam balance
a mass meter
all of the above

Answers

Answer;

-A triple beam balance

Explanation;

-Mass is the amount of matter in an object. Move to a different planet and an object's weight will change, but its mass will be the same. There are a couple of ways to measure mass. The Mass of an object doesn't change when an object's location changes. Weight, on the other hand does change with location.

-Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale.

Mass is measured using scales, a triple beam balance, or a mass meter.

What are scales used for?

Scales are commonly used for everyday measurements, where an object's weight is indirectly measured by the force it exerts on a spring or load cell.

A triple beam balance is a type of mechanical balance that uses a combination of sliding weights to determine mass.

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If a car travels 30.0 mi. north for 30.0 min., 50.0 mi. east for 1.00 hour, and 30.0 mi. south for 30.0 min., what is the average speed of the car over the total trip

Answers

Speed = (total distance covered) / (time to cover the distance) .

The direction at any time during the trip doesn't matter.

This car traveled  (30mi + 50mi + 30mi) = 110 miles .

The trip took  (30min + 60min + 30min) = 120 minutes

The average speed for the trip was

                           (110 miles) / (120 minutes)

                      =    (110 miles) / (2 hours)

                      =              55 miles/hour  .

Answer:

the answer is 55 mph

Explanation:

hope this helped

Which of the following do waves carry?a) matter
b) energy
c) matter and energy
d) the medium

Answers

Waves carries energy among the given options. Hence, option (b) is correct.

What is wave?

A wave is a dynamic disturbance that propagates and causes a change in equilibrium of one or more parameters in physics, mathematics, and related subjects. Quantities may oscillate regularly around an equilibrium (resting) value at certain frequency if a wave is periodic.

A travelling wave is one in which the entire waveform moves in one direction; in contrast, a standing wave is one in which two periodic waves are overlaid and move in the opposing directions. In a standing wave, there are some points where the wave amplitude seems reduced or even zero, and these positions have null vibration amplitudes.

Wave equations (standing wave fields of two opposing waves) or one-way wave equations (single wave propagation in a certain direction) are frequently used to describe waves.

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i would go with energy, because they give alllooooot of energy, from the waves.
hope that this would help you! =)

Problem 5. A bullet leaves a rifle with a velocity of 452 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.93 m. Determine the acceleration of the bullet.

Answers

Answer:

1.1 x 10⁵m/s²

Explanation:

Given parameters:

Velocity  = 452m/s

distance  = 0.93m

Unknown:

Acceleration of the bullet  = ?

Solution:

To solve this problem, we use one of the kinematics equation which is given below:

           V² = U²  + 2aS

V is the final velocity

U is the initial velocity  = 0m/s

a is the unknown acceleration

S is the distance traveled  

 So;

          452²   = 0²  + (2 x a x 0.93)

          204304  = 1.86a

               a  = 1.1 x 10⁵m/s²

Final answer:

The acceleration of the bullet in the gun barrel can be calculated using the kinematic equation for motion. By substituying the given values into the equation, we find the acceleration to be approximately 1.095 x 10^5 m/s^2.

Explanation:

The subject of this question is Physics, specifically a topic under mechanics known as kinematics. The problem given can be solved using kinematic equations which are used to describe the motion of an object without considering the forces that cause it to move. In this case, the final velocity (vf) of the bullet is given as 452 m/s, the initial velocity (vi) is assumed to be 0 as it starts from rest, and the distance (d) is given as 0.93 m. We are asked to determine the value of acceleration (a).

Using the kinematic equation vf2 = vi2 + 2ad and substituting the given values, we get (452 m/s)2 = 0 + 2*a*0.93 m. We can rearrange to solve for acceleration to get: a = (452 m/s)2 / (2*0.93 m) = 109523.66 m/s2.

So, the acceleration of the bullet in the gun barrel is approximately 1.095 x 105 m/s2.

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The perspective that focus's on human growth and flourishing. Based on Abraham Maslow's Hierarchy of Needs and self actualization.Group of answer choices

social/cultural

behavioral

biological

humanistic

Answers

The perspective that focuses on human growth and flourishing, based on Abraham Maslow's Hierarchy of Needs and self-actualization, is known as:

Humanistic

True or False, a sonographer can adjust the duration of an acoustic pulse since it depends upon the pulse's propagation speed.

Answers

Answer: True

Explanation: A sonographer can adjust the duration of an acoustic pulse because it depends on the pulse's propagation speed.