What is the recommended amount of time that a teenager should be participating in physical activity A: 30 min
B: 60 min
C: 45 min
D: 15 min

Answers

Answer 1

Answer:

The answer is B) 60 min.

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Give two ways of reversing the direction of the forces on the coil in the electric motor?

Answers

Answer:

Interchanging the poles of the magnet

Reversing the direction of the applied current

Explanation:

The working of the electric motor is associated with Fleming's left-hand rule.
It states that if a current-carrying conductor is placed inside a magnetic field, it experiences a force in the direction perpendicular to the direction of the electric current and magnetic field.
These three physical quantities are placed in a mutually perpendicular direction.
So, in order to reverse the direction of force, you have to either change the direction of the current or magnetic field.

Do you have answers for punnett square practice worksheet?

Answers

No i do not have answers for anything like that 0_0

If a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50 mi/hr?

Answers

$a= (V)/(t) \ \ \ \Rightarrow\ \ a= (60\ [mi/hr])/(8\ [s]) \n \nthe\ final\ speed\ after\ 5.0\ seconds\n \nV=50\ [mi/hr]+5\ [s]\ \cdot (60\ [mi/hr])/(8\ [s])=50\ [mi/hr] + (5)/(8) \cdot 60\ [mi/hr]=\n \n=50\ [mi/hr]+37.5\ [mi/hr]=87.5\ [mi/hr]$

$v_1=60\ (mi)/(h)\n\nt_1=8.0\ s=(8)/(3600)\ h=(1)/(450)\ h\n--------------\na=(v)/(t)\n\na=(60)/((1)/(450))\ (mi)/(h^2)=27000\ (mi)/(h^2)\n--------------\nv_o=50\ (mi)/(h)\n\nt=5.0\ s=(5)/(3600)\ h=(1)/(720)\ h\n--------------$

$v=v_o+at\n\n\nv=50\ (mi)/(h)+27000\ (mi)/(h^2)\cdot(1)/(720)\ h=50\ (mi)/(h)+37.5\ (mi)/(h)=87.5\ (mi)/(h)\leftarrow Answer$

Describe the energy transformations that occur when you bounce a ball?

Answers

The potential energy of the ball changes into kinetic energy.

the transformation is kinetic energy

How did Orion become a constellation?

Answers

While the Orion constellation is named after the hunter in Greek mythology, it is anything but stealthy. Orion, which is located on the celestial equator , is one of the most prominent and recognizable constellations in the sky and can be seen throughout the world.

What type of energy is formed when an object encounters friction?

Answers

Answer:

thermal energy

Friction does negative work and removes some of the energy the person expends and converts it to thermal energy. The net work equals the sum of the work done by each individual force. The forces acting on the package are gravity, the normal force, the force of friction, and the applied force.

Explanation:

Answer:

Explanation:

Thermal energy due to heat coming in from rubbing like rubbing your hand and it feel warm

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