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Leni [432]
4 years ago
9

Which are the three types of mutations?

Physics
1 answer:
WITCHER [35]4 years ago
7 0
Replication, Multiplication, and Substitution.
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An object of mass 2 kg rests on the floor, as shown in the picture. A force of 45 N, making an angle of 60° to the vertical, is
MA_775_DIABLO [31]

Answer:B

Explanation:

I just did that

6 0
4 years ago
A 28 g bullet pierces a sand bag 29 cm thick. If the initial bullet velocity was 55 m/s and it emerged from the sandbag with 18
Bumek [7]

The correct answer to the question is 130.4 N.

CALCULATION;

The mass of the bullet is given as m = 28 gram = 0. 028 kg.

The initial velocity of the bullet u = 55 m/s

The final velocity of the bullet  v = 18 m/s.

The distance covered by the bullet through the sand bag s = 29 cm.

                                                                                                   = 0.29 m

Let the acceleration of the bullet is a .

From equation of kinematics, we know that-

                                         v^2-u^2=\ 2as

                                        ⇒ a=\ \frac{v^2-u^2}{2s}

                                               =\ \frac{(18)^2-(55)^2}{2\times 0.29}\ m/s^2

                                              =\ -4656.897\ m/s^2

The negative sign is used due to the fact that force is opposing in nature. Its velocity is decreasing with time.

From Newton's second law of motion, we know that net force on a body is equal to the product of mass with acceleration.

Mathematically F = ma.

Hence, the frictional force exerted on the bullet is calculated as -

                                              F = m × a

                                                 = 0.028 × (-4656.897) N

                                                 = -130.4 N                     [ANS]

Here, N ( newton) stands for the unit of force.

8 0
3 years ago
What are elements made up of?<br><br> atoms<br><br> matter<br><br> Hydrogen<br><br> substance
gavmur [86]
Elements are made up of atoms
7 0
3 years ago
The amount of light energy absorbed by an object depends on what two factors?
IRISSAK [1]

Answer:

It depends on the electro-magnetic frequency of the light and object's nature of atoms.

8 0
3 years ago
The mass of a football player who weighs 1250N
Readme [11.4K]


Ah hah !  That depends on where he weighs 1250N, because
weight depends not only on mass but also on the local gravity.
So the same mass can have different weights in different places,
and the same weight can indicate different mass in different places.

       Weight = (mass) x (acceleration of gravity) .

Note:  1250N  is almost exactly  281 pounds.

-- If he weighs 1250N on Mars, then his mass is  336.8 kg.

-- If he weighs 1250N on Earth, then his mass is  127.5 kg.

-- If he weighs 1250N on the Moon, then his mass is  770.2 kg.

5 0
4 years ago
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