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3 years ago

Plzzz HELP MEEEE.

Physics

1 answer:

galina1969 [7]3 years ago

7 0

Answer:

D. The state of motion of an object with mass

Explanation:

Specifically, momentum is mv, mass times velocity

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Identify and explain the role of all the parts of the female reproductive system.

vekshin1

Answer:

Explanation:

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5 0

3 years ago

Jerry the mouse is running along a straight desert road at a constant velocity of 18 m/s. If a certain Tom cat wants to capture

Kruka [31]

Answer:

a) t = 1.75 s

b) x = 31.5 m

Explanation:

a) The time at which Tom should drop the net can be found using the following equation:

$y_{f} = y_{0} + v_{oy}t - \frac{1}{2}gt^{2}$

Where:

$y_{f}$ : is the final height = 0

y₀: is the initial height = 15 m

g: is the gravity = 9.81 m/s²

$v_{0y}$ : is the initial vertical velocity of the net = 0 (it is dropped from rest)

$0 = 15m - \frac{1}{2}9.81 m/s^{2}*t^{2}$

$t = \sqrt{\frac{2*15 m}{9.81 m/s^{2}}} = 1.75 s$

Hence, Tom should drop the net at 1.75 s before Jerry is under the bridge.

b) We can find the distance at which is Jerry when Tom drops the net as follows:

$v = \frac{x}{t}$

$x = v*t = 18 m/s*1.75 m = 31.5 m$

Then, Jerry is at 31.5 meters from the bridge when Jerry drops the net.

I hope it helps you!

3 0

3 years ago

The total potential and kinetic energy of the particles in an object is called

bekas [8.4K]

It can also be called the thermal kinetic energy. The internal energy of a system is the total thermal kinetic energy and thermal potential energy of all its atoms and molecules. The Kinetic Theory of Matter is explains the kinetic energy of particles in an object.

3 0

3 years ago

Read 2 more answers

What Gestalt principle illustrates our tendency to group items together based on how close they are to each other?

vladimir2022 [97]

Hey there,

Your correct answer would be proximity. Proximity is <span>principle illustrates our tendency to group items together based on how close they are to each other.

~Jurgen</span>

3 0

3 years ago

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An electric motor is used to run an elevator. The total mass of the elevator car and passenger is 1600 kg. The elevator moves up

Masja [62]

Answer:

Approximately $2.7 \times 10^{4}\; {\rm W}$ , assuming that $g = 9.81\; {\rm m\cdot s^{-2}}$

Explanation:

The weight of the elevator is:

$\begin{aligned}& \text{weight} \\ =\; & m\, g \\ =\; & 1600\; {\rm kg} \times 9.81\; {\rm m \cdot s^{-2}} \\ \approx\; & 15700\; {\rm N}\end{aligned}$ .

Since the speed of the elevator is constant, the acceleration of this elevator would be $0$ .

By Newton's Second Law of Motion, the net force on the elevator (proportional to acceleration) would also be $0\!$ . All external forces on the elevator need to be balanced in every direction.

The only two vertical forces on the elevator are:

the weight of the elevator (downward gravitational pull from the earth,) and
the upward pull from the motor.

These two forces need to balance one another. Since the weight of the elevator is approximately $15700\; {\rm N}$ , the upward pull of the motor would be $15700\; {\rm N}\!$ . in magnitude.

The direction of this upward pull is the same as the direction of the motion of this elevator. Thus, the work that the motor did on the elevator would be positive:

$\begin{aligned}& \text{work} \\ =\; & F\, s \\ \approx\; & 15700\; {\rm N} \times 15.0\; {\rm m} \\ \approx\; & 2.35 \times 10^{5}\; {\rm J}\end{aligned}$ .

Since the velocity of the elevator is constant, instantaneous power output of the motor would be equal to the average power of the motor:

$\begin{aligned}& \text{power} \\ =\; & \frac{\text{work}}{t} \\ \approx\; & \frac{2.35 \times 10^{5}\; {\rm J}}{8.82\; {\rm s}} \\ \approx\; & 2.7 \times 10^{4}\end{aligned}$ .

4 0

3 years ago