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Kamila [148]
3 years ago
7

What is 1 over 5th plus 1 over 3hs

Physics
1 answer:
uysha [10]3 years ago
4 0
21 because if 1 has to be more than 5 and ur going 3 hours and multiple it it's 21.
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1. *A car is going over the top of a hill whose curvature approximates a circle of radius 200 m. At
Greeley [361]

Answer:

The velocity of motion at which the occupants of the car appear to weigh 20% less than their normal weight is approximately 19.81 m/s

Explanation:

The given parameters are;

The curvature of the hill, r = 200 m

Due to the velocity, v, the occupants weight = 20% less than the normal weight

The outward force of an object due to centripetal (motion) force is given by the following equation;

F_c = \dfrac{m \times v^2}{r}

Where;

r = The radius of curvature of the hill = 200 m

Given that the weight of the occupants, W = m × g, we have;

F_c = 0.2 \times W = 0.2 \times m \times g

\therefore 0.2 \times m \times g = \dfrac{m \times v^2}{r}

v = √(0.2 × g × r)

By substitution, we have;

v = √(0.2 × 9.81 × 200) ≈ 19.81

The velocity of motion at which the occupants of the car appear to weigh 20% less than their normal weight ≈ 19.81 m/s.

3 0
3 years ago
A device that uses electromagnetic induction to transfer electrical energy from one circuit to another is a(n)_____.
Nutka1998 [239]

A device that uses electromagnetic induction to transfer electrical energy from one circuit to another is a transformer.

<h3>Which device uses electromagnetic induction to transfer electrical energy from one circuit to another?</h3>

  • A transformer is an electrical device that transfers energy from one electric circuit to another using the electromagnetic induction principle.
  • It is intended to change the AC voltage between the circuits while keeping the current's frequency constant.
  • A transformer work on the principle of electromagnetic induction in which flux is linked from primary to secondary.
  • Transformers accomplish this without establishing a conductive link between the two circuits. This is made feasible by using Faraday's Law of Induction, which explains how an electric circuit will interact with a magnetic field to produce an electromotive force (EMF).

To learn more about transformers refer:

brainly.com/question/25886292

#SPJ4

3 0
2 years ago
The driver of a car hears the siren of an ambulance that is moving away from her. If the actual frequency of the siren is 2000 h
MatroZZZ [7]
The answer is A.) 1,900 Hz
8 0
3 years ago
Read 2 more answers
The world record for a woman running a marathon is approximately 2.25 hours. If a marathon's distance is 26.2 miles (42164.81 me
netineya [11]

Answer:

11.6mph South East

Explanation:

Given parameters:

Time = 2.25hrs

Displacement  = 26.2miles south east

Unknown:

Velocity = ?

Solution:

Velocity is the displacement divided by the time taken. It is a vector quantity with both magnitude and direction.

 Now;

       Velocity  = \frac{displacement}{time taken}

       Velocity  = \frac{26.2}{2.25}   = 11.6mph South East

8 0
3 years ago
Read 2 more answers
The lead nucleus has a diameter of 14.2 fm. What is the electric field strength at the surface of a lead nucleus
Snowcat [4.5K]

Answer:

E = kQ / r^2 = 2.34*10^21 V/m

where k = 8.99*10^9 m/F

Q = 82 * 1.6*10^-19 C

r = 7.1*10^-15 m

Explanation:

14.2 FM = 2.34×10^21 V/m

6 0
3 years ago
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