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harkovskaia [24]
3 years ago
6

Help me please thank you​

Physics
2 answers:
Rus_ich [418]3 years ago
8 0

Answer:

B

Explanation:

mechanical wave that is the answer

Hope this helps plz hit the crown :D

Feliz [49]3 years ago
5 0

Answer:

B

Explanation:

The answer is the mechanical wave.

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An electron moves in the plane of this screen toward the top of the screen. A magnetic field is also in the plane of the screen
Ad libitum [116K]

Answer: the direction of the magnetic force on the electron will be moving out of the screen, perpendicular to the magnetic field.

Explanation:

The magnetic force F on a moving electron at right angle to a magnetic field is given by the formula:

F = BqVSinØ

If an electron moves in the plane of this screen toward the top of the screen. A magnetic field is also in the plane of the screen and directed toward the right. Then, the direction of the magnetic force on the electron will be perpendicular to the magnetic field

According to the Fleming's left - hand rule, the direction of the magnetic force on the electron will be moving out of the plane of the screen.

6 0
4 years ago
Is the temperature of a normal healthy old man is less than that of a normal healthy young man?
Inessa [10]

Answer:

The correct answer is no.

Explanation:

The temperature of a person changes depending on their age, the physical activity they are doing and until the time of day.

There is an established average temperature that is 98.6 ° F (37 ° C) as a healthy temperature.

If the temperature exceeds 100.4 ° F (38 ° C) it means that you may be ill or have an infection.

The difference in temperature by age is very minimal, but it is still a difference. Let's see:

  • Babies and children: from 97.9 ° F (36.6 ° C) to 99 ° F (37.2 ° C).
  • Adults: from 97 ° F (36.1 ° C) to 99 ° F (37.2 ° C).
  • Adults over age 65: 98.6 ° F (36.2 ° C).

8 0
4 years ago
5 points
Juli2301 [7.4K]

Answer:

Makes it hard to go to sleep at night

Explanation:

4 0
3 years ago
A cubical box measuring 1.29 m on each side contains a monatomic ideal gas at a pressure of 2.0 atm How much thermal energy do t
Marrrta [24]

Answer:

a) U = 652.545\,kJ, b) v \approx 659.568\,\frac{m}{s}

Explanation:

a) According to the First Law of Thermodinamics, the system is not reporting any work, mass or heat interactions. Besides, let consider that such box is rigid and, therefore, heat contained inside is the consequence of internal energy.

Q = U

The internal energy for a monoatomic ideal gas is:

U = \frac{3}{2} \cdot n \cdot R_{u} \cdot T

Let assume that cubical box contains just one kilomole of monoatomic gas. Then, the temperature is determined from the Equation of State for Ideal Gases:

T = \frac{P\cdot V}{n\cdot R_{u}}

T = \frac{(202.65\,kPa)\cdot(1.29\,m)^{3}}{(1\,kmole)\cdot(8.314\,\frac{kPa\cdot m^{3}}{kmole\cdot K} )}

T = 52.325\,K

The thermal energy contained by the gas is:

U = \frac{3}{2}\cdot (1\,kmole)\cdot (8.314\,\frac{kPa\cdot m^{3}}{kmole\cdot K})\cdot (52.325\,K)

U = 652.545\,kJ

b) The physical model for the cat is constructed from Work-Energy Theorem:

U = \frac{1}{2}\cdot m_{cat} \cdot v^{2}

The speed of the cat is obtained by isolating the respective variable and the replacement of every known variable by numerical values:

v = \sqrt{\frac{2 \cdot U}{m_{cat}}}

v = \sqrt{\frac{2\cdot (652.545 \times 10^{3}\,J)}{3\,kg} }

v \approx 659.568\,\frac{m}{s}

3 0
3 years ago
30 Pts! Answer fast please!<br> mass= 1 kg KE= 18 Joules <br> What is the velocity?
makvit [3.9K]
Its 21!! sorry i was late! :)
5 0
3 years ago
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