1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tomtit [17]
3 years ago
14

Please , physics. A and B

Physics
1 answer:
stepladder [879]3 years ago
7 0

Answer:

a. -5,4

b. 28

Explanation:

(see how to solve in pic)

You might be interested in
Which condition is a neuron in when the outside of the neuron has a net positive charge and the inside has a net negative charge
White raven [17]
The condition is a neuron in when the outside of the neuron has a net positive charge and the inside has a net negative charge (due to accumulation of more sodium ions) is C. resting potential. T<span>he </span>resting membrane<span> </span>potential<span> of a </span>neuron<span> is approximately -70 mV (mV=</span><span>millivolt)</span>
8 0
3 years ago
Read 2 more answers
Which of the following is correct for speed?
Olin [163]

Answer:

Speed is a "scalar" quantity

(C) is the correct answer

An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.

4 0
2 years ago
There are 8.8 liters of gas in a piston at a pressure of 1.75 atmospheres. The temperature remains constant, and the gas is comp
saveliy_v [14]

The new pressure P2 is 2.48 atmosphere.

<u>Explanation:</u>

Here, the one of the product of pressure and volume is equal to the products of pressure and volume of other.

By using Boyles's law,

               pressure is inversely proportional to volume,

                                         P1 V1 = P2 V2

where P1, V1 represents the first pressure and volume,

           P2, V2 represents the second pressure and volume

                                              P2 = (P1 V1) / V2

                                                    = (1.75 \times 8.8) / 6.2

                                              P2  = 2.48 atmosphere.  

         

5 0
3 years ago
In the child's game of tetherball, a rope attached to the top of a tall pole is tied to a ball. Players hit the ball in opposite
Eddi Din [679]

Answer:

option C

Explanation:

the ball is moving circular around the pole

Angular momentum of the system is constant

              J = I ω

now,

               \omega\ \alpha\ \dfrac{1}{I}

               \omega\ \alpha\ \dfrac{1}{mr^2}

               \omega\ \alpha\ \dfrac{1}{r^2}

the rope radius is decreasing as it revolving around the pole

angular speed is inversely proportional to radius.

so, the angular speed will increase.

The correct answer is option C

7 0
3 years ago
The tungsten filament of a light bulb has an operating temperature of about 2 100 K. If the emitting area of the filament is 1.0
Murljashka [212]

Answer:

75 W

Explanation:

T = temperature of the filament = 2100 K

A = Emitting area of the filament = 1 cm² = 10⁻⁴ m²

e = Emissivity = 0.68

\sigma = Stefan's constant = 5.67 x 10⁻⁸ Wm⁻²K⁻⁴

Using Stefan's law, Power output of the light bulb is given as

P = \sigma e AT^{4} \\P = (5.67\times10^{-8}) (0.68) (10^{-4}) (2100)^{4}\\P = 75 W

5 0
3 years ago
Other questions:
  • In a collision, a 15 kg object moving with a velocity of 3 m/s transfers some of its momentum to a 5 kg object. What would be th
    5·1 answer
  • GUESS WHAT? I'LL MAKE YOU BRAINLIEST!!! PLEASE ANSWER THING QUICKLY!
    7·1 answer
  • State True or False:If the positive x-axis points to the right and the x-component of velocity is negative, the cart must be mov
    11·1 answer
  • One of the 63.5-cm-long strings of an ordinaryguitar is tuned to produce the note {\rm B_3}(frequency 245 Hz) when vibrating ini
    7·1 answer
  • How the relative motion and relative position of the Sun, Earth and Moon affect the seasons, phases of the moon and eclipses?
    9·1 answer
  • when a human cannon ball shoots in the air for 9 seconds, she travels 37 meters before ut lands. Caculate the speed​
    7·1 answer
  • What is Friction<br>short note on friction​
    7·1 answer
  • A What quantity is equal to​
    13·1 answer
  • Explain how star clusters help us understand the stages of stellar evolution
    8·1 answer
  • A spring toy jumps up from the floor and comes back down to the floor. Its initial speed is 12 m/s. What is the
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!