All of the following are true of models except

Answers

Answer 1

Answer: I did this.
If your answers look like this...
a. models have the ability to communicate
b. models have the ability to correctly predict all outcomes
c. model have the ability to test predictions
d. models have the ability to save time
Then it's D

Answer 2

Answer:

Final answer:

Models are representations that help us understand and analyze real-life situations, but they may have limitations or assumptions that make some statements not universally true.

Explanation:

Models are representations of real-life situations or things that help us understand and analyze them better. However, the statement, 'all of the following are true of models except,' implies that there are some characteristics that do not apply to models. Different models may have different purposes, limitations, or assumptions that may make some statements not universally true. For example, while models can provide insights and predictions, they cannot capture the full complexity of the real world or account for all variables. Models are valuable tools in various fields and disciplines, including social studies, as they help us simplify, analyze, and communicate complex phenomena and processes.

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In Act III, Scene 1, who hears these words from Titania?Thou art as wise as thou art beautiful.
A. Puck
B. Oberon
C. Bottom
D. Peaseblossom

Answers

C. Bottom

Titania speaks these words as she is under the enchantment of the magic flower, it makes her fall in love with the first thing she sees. It's comedic because Bottom is also enchanted to have the head of a donkey, so she's claiming that this peasant with a donkey head is both wise and beautiful. The reality being that he is as wise as he is beautiful, in that he is neither beautiful nor wise.

A fulcrum is? A. A support for an inclined plain. B. The place where a lever is supported. C. Measured in Newton-meters. D. Measured in joules.

Answers

a fulcrum is the point which a lever rests or is supported on which it pivots, so B. hope this helps!!

a bullet of mass m is fired into a block of mass m that is at rest. the block, with the bullet embedded, slides distance d across a horizontal surface. the coefficient of kinetic friction is μk.

Answers

The expression for the bullet's speed vbullet is $v=\sqrt{(2\mu_k (m+M)gd)/(m)}$ and the speed of a 9.0 g bullet is v=16.8 m/s

Explanation:

A bullet of mass m is fired into a block of mass m that is at rest. the block, with the bullet embedded, slides distance d across a horizontal surface. the coefficient of kinetic friction is μk.

The initial kinetic energy of the bullet is given by

$K_i = (1)/(2)mv^2$

where

m is the mass of the bullet

v is the initial speed of the bullet

The expression for the bullet's speed vbullet is

$F=\mu_k (m+M) g$

where

$\mu_k$ is the coefficient of kinetic friction

g is the acceleration of gravity

The work done by the force of friction is

$W=-Fd = -\mu_k (m+M)g d$

where d is the displacement of the block+bullet.

Because the final kinetic energy is zero (the bullet with the block comes at rest), we can write:

$W=K_f - K_i = -K_i$

And so

$-\mu_k (m+M) g d = -(1)/(2)mv^2$

By solving for v, the solution for the bullet speed:

$-\mu_k (m+M) g d = -(1)/(2)mv^2\nv=\sqrt{(2\mu_k (m+M)gd)/(m)}$

The speed of a 9.0 g bullet that, when fired into a 12 kg stationary wood block causes the block to slide 5.4 cm across a wood table. Assume that k=0.20.

We have:

the mass of the bullet, m = 9.0 g = 0.009 kg

the mass of the block, M = 12 kg

the distance covered by the block+bullet, d = 5.4 cm = 0.054 m

the coefficient of friction, $\mu_k = 0.20$

the acceleration of gravity, $g = 9.8 m/s^2$

By substituting, we got

$v=\sqrt{(2 (0.20) (0.009 kg+12 kg)(9.8 m/s^2)(0.054 m))/(0.009 kg)}=16.8 m/s$

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uk=2m*the normal force
the distance d is needed only if you were asked about work

True or false:when a plant falls from a window it's thermal energy is transformed into kinetic energy.

Answers

FALSE. The energy transformation is from gravitational potential energy (due to height) to kinetic energy (due to speed).

Which of these units results when a distance of 35 m is multiplied by a force of 27 n, and then divided by a time of 5s? a newtom n is kg * m/s2 in si base units?

Answers

Answer:

SI unit for Joule per second is $(kg m^(2) )/(s^(2) )$ .

Explanation:

When a distance of 35 m is multiplied by a force of 27 N.

Force × distance = 27 N × 35 m = 945 Joule

945 Joule = 945 $(kg m)/(s^(2) ) * m$

945 joule = 945 $(kg m^(2) )/(s^(2) )$

This is SI unit for force multiplied by distance.

The above quantity is divided by 5 s.

$(945)/(5) (Joule)/(s)$ = 189 $(kg m^(2) )/(s^(3) )$

SI unit for Joule per second is $(kg m^(2) )/(s^(2) )$ .

Answer:

$(F * d)/(t) = 189 (kg m^2)/(s^3)$

Explanation:

Here first we multiplied the force with the distance so we have

F = 27 N

distance = 35 m

so the product is given as

$F* d = 27 N * 35 m$

$F* d = 945 N m$

now we have to divide it by time

so we have

$(F * d)/(t) = (945)/(5)$

$(F * d)/(t) = 189 Nm/s$

so it is

$(F * d)/(t) = 189 (kg m^2)/(s^3)$

Calculate the man’s mass. (Use PE = m × g × h, where g = 9.8 N/kg.)A man climbs a wall that has a height of 8.4 meters and gains a potential energy of 4,620 joules. His mass is about
kilograms

Answers

Answer:

mass=56.12kg

Explanation:

PE=mgh

4620=m×9.8×8.4

make msubject of the formula...

m =4620/(9.8×8.4)

m=4620/82.32

m=56.12kg

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