3 years ago

I need help ASAP PLEASE!!!

Physics

1 answer:

Setler79 [48]3 years ago

3 0

Answer:

A. O and Fe

Explanation:

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Decide whether each activity is aerobic or anaerobic exercise. sprinting to catch the bus

arsen [322]

Answer:

Anaerobic

Explanation:

aerobic: relating to, involving, or requiring free oxygen.

anaerobic: relating to, involving, or requiring an absence of free oxygen.

6 0

4 years ago

Two masses are joined by a mass less string. A 33-N force applied vertically to the upper mass gives the system a constant upwar

lisov135 [29]

Lower mass: 1.20 kg, upper mass: 1.28 kg

Explanation:

In order to solve the problem, we consider the forces acting on the upper mass only first.

The upper mass is acted upon three forces:

The applied force $F_a=33 N$ , upward
The weight of the mass itself, $m_u g$ , where $m_u$ is the upper mass and $g=9.8 m/s^2$ is the acceleration of gravity, downward
The tension in the string, $T=16 N$ , downward

Therefore, the equation of the forces for the upper mass is:

$F_a - m_u g - T = m_u a$

where

$a=3.5 m/s^2$ is the acceleration (upward)

Solving for $m_u$ ,

$m_u = \frac{F_a-T}{a+g}=\frac{33-16}{3.5+9.8}=1.28 kg$

Now we can find the lower mass by considering the forces acting on it:

The tension in the string, T = 16 N, upward
The weight of the mass itself, $m_L g$ , where $m_L$ is the lower mass, downward

So the equation of the forces is

$T-m_L g = m_L a$

And solving for the mass,

$m_L = \frac{T}{a+g}=\frac{16}{3.5+9.8}=1.20 kg$

Learn more about acceleration and forces:

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7 0

3 years ago

Please help. I don’t understand

Irina18 [472]

The answer to your thing is d

6 0

3 years ago

Draw a model diagram to represent water

satela [25.4K]

Answer:

hope this will help

please give brainliest if correct

5 0

3 years ago

A microscope has an objective lens with a focal length of 14.0mm . A small object is placed 0.80mm beyond the focal point of the

Nikolay [14]

Answer:

A. 260 mm

B. - 18

C. 175

Explanation:

The expression for the lens equation is

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v}$

$\frac{1}{14.0mm} = \frac{1}{14.80 mm} + \frac{1}{v}$

$\frac{1}{v} = \frac{1}{14.0} - \frac{1}{14.80}$

v = 259 mm

= 260 mm or 26 cm (to 2 s.f)

check the attached files for additional solution

3 0

3 years ago