All categories

3 years ago

Plz I need help........................

Physics

2 answers:

Kazeer [188]3 years ago

4 0

Answer:

Echolocation

Explanation:

.....................................

Natali [406]3 years ago

4 0

The location of objects by reflected sound, in particular that used by animals such as dolphins and bats.

You might be interested in

Which of these stars has the hottest core? (a) a white main-sequence star (b) an orange main-sequence star (c) a red main-sequen

Nata [24]

the answer is A) a white main-sequence star.

5 0

4 years ago

Read 2 more answers

Refer to the image. Calculate the magnitude of change in velocity of the cue ball.

valkas [14]

Answer:

If you add the 2 velocity vectors you get the velocity of the third vector which is the (change in) velocity of the cue ball after striking the cushion

V * 2 * cos 45 = 4 * cos 45 = 2.83 m/s

6 0

2 years ago

A pottery wheel, initially at rest, is assumed to be a uniform disk of mass 3.0 kg and radius 20.0 cm. A 25.0 N force is applied

miv72 [106K]

Answer:

a) 83.33 rad/s^2

b) 2500 rad/s

c) 6187.5 rad

Explanation:

Given data:

radius of wheel = 20.0 cm

mass of wheel = 3.0 kg

force = 25 N

a) angular acceleration

we know torque is given as

$T = I \times \alpha$

$F\times R = I \times \alpha$

$F\times R = \frac{1}{2} mR^2 \times \alpha$

solving for angular acceleration $\alpha$

$\alpha = \frac{2F}{mR} = \frac{2*25}{3*0.2} = 83.33 rad/s^2$

b) angular velocity

duartion of force applied = 30.0 sec

$\omega_{30} = \omega_0 +alpha t$

= o + 83.33 *30 = 2500 rad/sec

c) angular displacement

$\theta_{15} = = \omega_0 +\frac{1}{2} alpha t_{15}^2 = 0 + \frac{1}{2} 83.33 \times 15^2$

$\theta_{30} = \omega_0 +\frac{1}{2} alpha t_{30}^2 = 0 + \frac{1}{2} 83.33 \times 30^2$

$\Delta \theta = \theta_{30} - \theta_{15}$

$\Delta \theta = 6187.5 rad$

3 0

3 years ago

15. A machine must move an object 15.1 meters by exerting a 121 Newton force. If the machine

Tcecarenko [31]

The power provided by the machine is 13.24 W.

Answer:

Explanation:

Power is determined as the ratio of work done by the system or on the system to the time interval. As the work done is equal to the product of force acting on the system or by the system with the displacement experienced by the system. The power provided by the machine will be

Power = Work done /Time

As the force is given as 121 N and the displacement is given as 15.1 m in a time interval of 2.3 minutes. The time interval should be changed to seconds for each solving ability.

Time taken = 2.3 * 60 s = 138 s

Power = (121×15.1)/138 = 13.24 W.

So the power provided by the machine is 13.24 W.

6 0

3 years ago

a central concept in quantum mechanics is that both matter and are alternate forms of the same entity and therefore both exhibit

Stels [109]

In quantum mechanics, a central concept is that both matter and <u>energy</u> are alternate forms of the same entity and therefore both exhibit dual characteristics of particles and of <u>waves</u>.

Matter can be defined as anything that has mass and is able to occupy space.

Thus, any physical object or substance that is found on Earth is typically composed of matter.

Similarly, energy is highly affected by the mass of a any physical object or substance just like matter,

Hence, both energy and matter are known to be made up of atoms and as a result of this fact, exhibit dual characteristics of particles and of waves.

A wave can be defined as a disturbance in a medium that progressively transports energy from a source location to another location without the transportation of matter.

In conclusion, this central concept makes it easier for us to better understand the behavior of tiny particles such as electrons.

Find more information: brainly.com/question/17203857

4 0

3 years ago

Read 2 more answers