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IgorC [24]
3 years ago
7

The term heredity is best defined as A. the ability of a species to reproduce. B. the hair color of a person's parents and grand

parents. C. the habits and skills that are learned from the previous generation. D. the genetic instructions passed from one generation to the next.
Physics
1 answer:
suter [353]3 years ago
6 0

Answer:

I think it's D :)

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A 21.0 kg shopping cart is moving with a velocity of 4.0 m / s. It strikes a 7.0 kg box that is initially at rest. They stick to
jonny [76]

Explanation:

Given that,

Mass of the shopping cart, m_s=21\ kg

Initial speed of the shopping cart, u_s=4\ m/s

Mass of the box, m_b=7\ kg

Initial speed of the box, u_b=0 (at rest)

They stick together and continue moving at a new velocity. It is a case of inelastic collision.

(a) The momentum of the shopping cart before the collision is given by :

p_s=m_s\times u_s\\\\p_s=21\times 4\\\\p_s=84\ kg-m/s

(b) The momentum of the box before the collision is given by :

p_b=m_b\times u_b\\\\p_b=7\times 0\\\\p_b=0

(c) The velocity of the combined shopping cart/box wreckage after the collision is given by using the conservation of momentum as :

m_su_s+m_bu_b=(m_s+m_b)V\\\\V=\dfrac{m_su_s+m_bu_b}{(m_s+m_b)}\\\\V=\dfrac{21\times 4+0}{(21+7)}\\\\V=3\ m/s

Hence, this is the required solution.

8 0
3 years ago
How many half-lives have passed if a sample contains 25% of its original carbon-14?
ICE Princess25 [194]

Answer: 2 half lives

6 0
2 years ago
The Solar System is made up of eight planets, numerous comets, asteroids, and moons, and the Sun. The force that holds all of th
Marrrta [24]
Your Question:
<span>The Solar System is made up of eight planets, numerous comets, asteroids, and moons, and the Sun. The force that holds all of these objects together is _______.
A.
magnetism
B.
tension
C.
electromagnetic attraction
D.
gravity </span>
Our Teams Answer:

the force is gravity holding them


Our Teams aim's to please and We are happy to help! Its the answer is wrong please notify us quickly for we can fix it quickly! Thanks :)

-ExperimentsDIY


7 0
3 years ago
Read 2 more answers
In an experiment, students measure the position x of a cart as a function of time t for a cart that starts at rest and moves wit
Minchanka [31]

Given :

Initial velocity , u = 0 m/s² .

To Find :

The acceleration of the cart.

Solution :

Since, acceleration is constant.

Using equation of motion :

x = ut + \dfrac{at^2}{2}\\\\x = \dfrac{at^2}{2}

Putting, t = 1 s  and x = 4 m in above equation, we get :

4 = \dfrac{a(1)^2}{2}\\\\a = 8 \  m/s^2

Therefore, the acceleration of the cart is 8 m/s².

5 0
3 years ago
Which is the correct scientific notation of the number 0.000681?
Natasha2012 [34]
In scientific notation", that number would be written as

                             6.81 x 10⁻⁴ .
3 0
3 years ago
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