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
weqwewe [10]
3 years ago
5

During physical activity of moderate intensity, your heart will beat at a percentage of its maximum rate. What is the target hea

rt rate for moderate-intensity activity?
Physics
1 answer:
Phoenix [80]3 years ago
8 0
The target heart rate for moderate-intensity activity is 80%
You might be interested in
If you change the number of loops in a solenoid, what happens to the strength of the magnetic field of an electromagnet?
zhenek [66]

The strength of the magnetic field is proportional to the number of turns in the solenoid; this means that the strength of the field will increase or decrease as you increase or decrease the number of turns in the coil, respectively - they are directly related.

Hope this helps!

6 0
3 years ago
If the specific surface energy for magnesium oxide is 1.0 J/m2 and its modulus of elasticity is (225 GPa), compute the critical
alexdok [17]

Answer:

The critical stress required for the propagation of an initial crack              \sigma_{c} =  21.84 M pa

Explanation:

Given data

Modulus of elasticity E = 225 × 10^{9} \frac{N}{m^{2} }

Specific surface energy for magnesium oxide is \gamma_{s} = 1 \frac{J}{m^{2} }

Crack length (a) = 0.3 mm = 0.0003 m

Critical stress is given by \sigma_{c}^{2} } = \frac{2 E \gamma}{\pi a} -------- (1)

⇒ 2 E \gamma_{s} = 2 × 225 × 10^{9} × 1 = 450 × 10^{9}

⇒ \pi a = 3.14 × 0.0003 = 0.000942  

⇒ Put these values in equation 1 we get

⇒ \sigma_{c}^{2} } = \frac{450  }{0.000942} 10^{9}

⇒ \sigma_{c}^{2} } = 4.77 × 10^{14}

⇒ \sigma_{c} = 2.184 × 10^{7} \frac{N}{m^{2} }

⇒ \sigma_{c} =  21.84 \frac{N}{mm^{2} }

⇒ \sigma_{c} =  21.84 M pa

This is the critical stress required for the propagation of an initial crack.

4 0
3 years ago
What part of the water cycle is the ocean part of?
Anna11 [10]
The hydrological cycle
6 0
3 years ago
If two overlapping waves have the same amplitude then what happens?
KonstantinChe [14]

I think the answer could be that it could result in resonance.

There is not much to go from in this question. Specify whether the are on the same wave length or on separate.

If the 2 waves are on the same wave length and going towards each other with the same amplitude, that would result in them colliding and forming a larger amplitude, or something called constructive interference.

I hope this helps you!

5 0
3 years ago
A child swings a sling with a rock of mass 1.3 kg, in a radius of 0.6. From rest to an angular velocity of 6 rad/s. What is the
mezya [45]

Answer:

8.42Joules

Explanation:

The rotational kinetic energy, denoted by E(rotational), can be calculated using the formula:

E(rotational) = 1/2 × I × ω²

Where;

I = moment of inertia (kgm²)

ω = angular velocity (rad/s)

However, we need to calculate the moment of inertia in this question by using the formula:

I = m × r²

Where;

m = mass (1.3kg)

r = radius (0.6m)

I = 1.3 × 0.6²

I = 1.3 × 0.36

I = 0.468 kgm²

Since I = 0.468 kgm², ω = 6 rad/s, we can calculate rational kinetic energy using:

K.E(rotational) = 1/2 × I × ω²

K.E(rotational) = 1/2 × 0.468 × 6²

K.E(rotational) =1/2 × 0.468 × 36

K.E(rotational) = 18 × 0.468

K.E(rotational) = 8.424

K.E(rotational) = 8.42Joules

4 0
3 years ago
Other questions:
  • a plane being propelled due east is actually moving at 225mph an angle of 40 degrees north of east, how fast is the crosswind th
    14·1 answer
  • Photons are also known as beta particles. (true or false)
    7·1 answer
  • Which is true regarding diffusion and osmosis? Question 3 options:
    7·1 answer
  • Which are causes of desertification?
    13·2 answers
  • Based on what you know, please list at least 4 characteristics of weather. IDK IF RIGHT SUBJECT
    7·1 answer
  • In a chemical reaction, molecules of hydrogen gas (H2) react with molecules of oxygen gas (O2) in a sealed reaction chamber to p
    5·1 answer
  • What are 3 facts you learned about the periodic table:
    11·1 answer
  • To start a great night of doing physics homework, you sit down to pour yourself a good cup of coffee. Your coffee mug has a mass
    7·1 answer
  • PLZ HELP why do the planets move in a way that promotes life?​
    10·1 answer
  • A race horse can run a mile race in just under 2 minutes. Is it possible for
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!