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Ivenika [448]
3 years ago
10

If you run at a constant speed of 7.5 m/s, how long does it take for you to finish a 100 m race ? show your work

Physics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

13s

Explanation:

(7.5m/s)(t)=(100m)

t=(100/7.5)s=13s

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4 0
3 years ago
A 0.12-kg metal rod carrying a current of current 4.1 A glides on two horizontal rails separation 6.3 m apart. If the coefficien
Neporo4naja [7]

Answer:

The magnetic field is B  =  8.20 *10^{-3} \  T

Explanation:

From the question we are told that

   The  mass of the metal rod is  m  = 0.12 \ kg

    The current on the rod is  I  = 4.1 \ A

    The distance of separation(equivalent to length of the rod ) is L   = 6.3 \ m

     The coefficient of kinetic friction is \mu_k  =  0.18

      The kinetic frictional force is  F_k  = 0.212 \ N

     The constant speed is v  = 5.1 \ m/s

Generally the magnetic force on the rod is mathematically represented as  

      F  =  B * I  *   L

For  the rod to move with a constant velocity the magnetic force must be equal to the kinetic frictional force so

        F_ k  =  B*  I  *  L

=>      B  =  \frac{F_k}{L  *  I  }

=>       B  =  \frac{0.212}{ 6.3   *  4.1   }

=>       B  =  8.20 *10^{-3} \  T

7 0
3 years ago
Which of these is not a greenhouse gas?
Temka [501]

Answer:

C should be the correct answer,

Explanation:

The gas which produce heat in the atmosphere as it is increased is called a greenhouse gas.  Gases like argon , nitrogen, and Oxygen etc. is not a greenhouse gas. Since O3 is not a greenhouse gas it cannot produce heat in the atmosphere .

Hope you understand,

3 0
2 years ago
Eli's gross income as a painter is $30,000 per year, which places him in the 15% approximate tax bracket. How much does he pay i
Umnica [9.8K]

Answer: $4,500

Explanation: 1% of $30,000 would be $300. If you multiply that by 15, you get $4,500, so 15% of 30,000 is 4,500.

3 0
2 years ago
The force of attraction between two objects, which is related to the object's mass is the definition of
Andrews [41]
This would be the definition of gravitational force, I believe. The force of attraction between 2 objects based on the mass of the objects.
7 0
2 years ago
Read 2 more answers
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