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
iris [78.8K]
3 years ago
8

Help me please. I’ll select brainliest!

Physics
2 answers:
pishuonlain [190]3 years ago
8 0

Answer:

90 degrees

Explanation:

the answer is 90 because angle a has a square on the angle which means it is 90 degrees

fomenos3 years ago
6 0

Answer:

90°

Explanation:

It is so because

the square shaped angle means 90°

You might be interested in
If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This
7nadin3 [17]

Answer:

1. Plateau where the temperature stays constant

2. Melting

3. Boiling points of the substance

Explanation:

The relationship between kinetic energy and temperature is given as follows;

\overline E = \dfrac{3}{2} \times \dfrac{R}{N_A} \times T

Where;

\overline E = The average kinetic energy of the atom

R = The universal gas constant

N_A = Avogadro's number

T = The temperature in Kelvin

Therefore, the kinetic energy increases as the temperature increases, however when the energy is not being converted into kinetic energy, the energy is stored as internal potential energy in the melted or evaporated state of the substance

Therefore, we have;

If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This will be represented by a 1. <u>plateau where the temperature stays constant</u> on a heating curve, which occur at the 2. <u>melting</u> and 3. <u>boiling points of the substance.</u>

3 0
3 years ago
Hy would you expect sodium (Na) to react strongly with chlorine (Cl)?
erastova [34]
Chlorine needs to gain one electron and sodium needs to lose one electron
8 0
3 years ago
Ayuda plisss, es urgente
kramer

(Lo siento si mi español es malo, no es mi primera lengua )

1. velocidad media = desplazamiento/tiempo

desplazamiento = 0 porque el athelete vuelve al punto inicial en un círculo

velocidad media = desplazamiento/tiempo = 0/10 = 0

2. la distancia entre A y B es 5 cm porque

a^2 + b^2 = c^2 (el teorema de Pitágoras) así:

rapidez media = distancia/tiempo = 5/5 = 1 cm/s o 0.01 m/s

y yo no se cómo hacer 3-5 :( lo siento

3. Creo que es dos triángulo s AB y CD menos la línea de fondo

5. Creo que es E + F porque B y D b y d cancelarse el uno al otro y C y C tambien pero no lo sé con seguridad.

8 0
2 years ago
What is the frequency of a wave with a wavelength of 7.88 x 10^(-8) m?
dedylja [7]

Answer:

f = 23.64 Hz

Explanation:

From the wave equation, the relationship between frequency and wavelength is given by;

f = cλ

Where;

λ is wavelength

c is speed of light with a constant value of 3 × 10^(8) m/s

f is frequency

We are given wavelength of 7.88 x 10^(-8) m

Thus;

f = 7.88 x 10^(-8) × 3 × 10^(8)

f = 23.64 Hz

4 0
2 years ago
What is the speed of light
Inessa05 [86]

In vacuum and empty space, it's 299,792,458 meters per second
(186,282.4 miles per second).

In any material stuff, it's somewhat less.  How much less depends on
what stuff it is ... it's different in each material "medium".

5 0
3 years ago
Other questions:
  • A car moving with a velocity of 20 meters/second has 1.8**10^5 joules of kinetic energy what is the mass of the car?
    10·1 answer
  • The diagram below shows a flat mirror reflecting
    8·2 answers
  • An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.00 above the horizontal. What is
    7·1 answer
  • Can someone give me tips for science camp!! Please
    8·2 answers
  • Why is it impossible to create a perpetual motion machine?
    14·1 answer
  • Explain the intermittent reinforcement schedules in your own words
    14·1 answer
  • A ball of mass 0.500 kg is carefully balanced on a shelf that is 2.70 m above the ground. What is its gravitational potential en
    10·1 answer
  • A car driver spends 3hrs driving at an average speed of 80km/hr, stops for 30 minutes to
    15·1 answer
  • Which two statements describe force?
    8·1 answer
  • A 200 g mass, attached to a 30 cm long string, travels at a speed of 1.3 ms-1 along horizontal circular path. Relative to the ce
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!