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m_a_m_a [10]
3 years ago
15

When lava cools, which type of rock forms?

Physics
1 answer:
finlep [7]3 years ago
8 0
Igneous rocks<span> are </span>formed<span> from </span>lava<span> or magma. Magma is molten </span>rock<span>that is underground and </span>lava<span> is molten </span>rock<span> that erupts out on the surface. The two main </span>types<span> of igneous </span>rocks<span> are plutonic </span>rocks<span> and volcanic </span>rocks<span>. Plutonic </span>rocks<span> are </span>formed<span> when magma </span>cools<span> and solidifies underground</span>
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During a certain time interval, the angular position of a swinging door is described by θ = 4.91 + 9.7t + 2.06t2, where θ is in
polet [3.4K]

Explanation:

a)

θ = 4.91 + 9.7t + 2.06t² when t = 0

θ = 4.91 rad

θ = 4.91 + 9.7t + 2.06t²

ω = dθ/dt = 9.7 + 2.06t, when t =0

ω = dθ/dt = 9.7 + 0

ω = 9.7 rad/s

α = d²θ/dt² = 2.06

α= 2.06 rad/s²

b) please use same method above for t = 2.94 s

3 0
4 years ago
What is an appraisal of an employee's performance in the workplace?
Diano4ka-milaya [45]

Answer:

B. evaluation

Explanation:

An employee can be defined as an individual who is employed by an employer of labor to perform specific tasks, duties or functions in an organization.

Basically, an employee is saddled with the responsibility of providing specific services to the organization or company where he is currently employed while being paid a certain amount of money hourly, daily, weekly, or monthly depending on the contractual agreement between the two parties (employer and employee).

Hence, while an employer may be the owner of a business firm or company, an employee is a subordinate employed to provide unwavering services to the employer while also, being professional and diligent at all times.

Human resources management (HRM) can be defined as an art of managing, controlling and improving the number of people (employees or workers), functions, evaluation of employees, activities which are being used effectively and efficiently by an organization.

Hence, human resources managers are saddled with the responsibility of recruiting, evaluating, managing and improving the welfare and working conditions of the employees working in an organization.

Basically, the human resources manager carry out appraisals on the performance of the various employees working in an organization. These informations about employees are typically used for promotional purposes, allowances and other benefits or form of rewards.

6 0
3 years ago
Please help! i'm horrible at this
frez [133]

Answer:

a = Δv/t = (vf - vi)/t = (0 - 5)/4 = -1.25 m/s²

Explanation:

You may or may not need the negative sign, depending on how the question designer was thinking about the problem.

4 0
4 years ago
Can someone please help me with this !!!!
lukranit [14]

Answer:

I'm not sure but I think it's 4.5 v

3 0
3 years ago
A radioactive atom has just undergone nuclear decay. Its mass number is now four less than the original atom. Which type of nucl
fredd [130]

Answer:

Explanation:

mass number is now 4 times less than the original value so alpha decay occur during alpha decay the mass number is decreased 4 times and atomic number decreased 2 times than the original value

4 0
3 years ago
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