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
Vinil7 [7]
3 years ago
12

If a.b= 0 what is the angle between a and b​

Physics
1 answer:
Vlad1618 [11]3 years ago
6 0

Answer:

π/2 (90°)

Explanation:

The dot product of two vectors equals the product of their magnitudes and the cosine of the angle between them.

a·b = ||a|| ||b|| cos θ

If the dot product is 0:

0 = ||a|| ||b|| cos θ

0 = cos θ

θ = π/2

The angle between a and b is π/2 (90°).

You might be interested in
An object is released from rest and falls a distance h during the first second of time. How far will it fall during the next sec
Viefleur [7K]

Answer:

E. 3h

Explanation:

We know that

u = 0 m/s.

velocity after t = 1s

v = u+gt = 0+9.81 x 1s= 9.81 m/s

distance covered in 1st sec

= =>> ut+0.5 x g x t²

=>>0 + 0.5x 9.81 x 1 = 4.90m

Let 4.90 be h

distance travelled in 2nd second will now be used

So velocity after t = 1s

=>>1 x t+ 0.5 x g x t²

=>9.81x 1 + 0.5 x 9.81 x 1 = 3 x 4.90

So since h= 4.90

Then the ans is 3x h = 3h

3 0
3 years ago
URGENT PLZ HELPPP!
Dovator [93]

λ = 3.125 m

λ = 2.83 m

<h3>Further explanation</h3>

Given

Frequency of radio : 96 MHz and 106 MHz

Required

The wavelength

Solution

Wavelength : from the crest to the crest of the next wave or the trough to the trough

Frequency (f): number of waves in one second

v = λ x f

λ = v : f

Input the value :

f = 96 MHz = 96 x 10⁶ Hz

λ = v : f

λ = 3 x 10⁸ :  96 x 10⁶

λ = 3.125 m

f = 106 MHz = 106 x 10⁶ Hz

λ = v : f

λ = 3 x 10⁸ :  106 x 10⁶

λ = 2.83 m

6 0
3 years ago
I'll give the brainliest!
Vaselesa [24]

Answer:

Explanation:

1. Althea Gibson

2. Nathon Green

3. jeff carter

4 conused

5.Norm Duke- At 18

          Hope this helps!!

8 0
3 years ago
Which of the following happens when a substance melts?
Bess [88]

Answer:

hola como estas hablas español

Explanation:

3 0
3 years ago
Given that the electromagnetic force is far stronger than gravity on a per-particle basis, why doesn't the electromagnetic force
Kaylis [27]

Explanation:

The electro magnetic force is given by

F = \frac{k.q_{1}.q_{2}}{r^{2}}

where q_{1} and q_{2} are charged particles

           k =Coulombs constant

          r = distance between two charges

And gravitational force is given by

F = \frac{G.m_{1}.m_{2}}{r^{2}}

where m_{1} and m_{2} are masses

           G =Garvitation constant

          r = distance between two masses

Now since the planets, stars and galaxies are electrically neutral, therefore they have zero electrical charge and so electro magnetic forces have no affect on  these planets, stars and heavenly bodies.

     Whereas the masses of the heavenly bodies are very large, so they are largely affected by the gravitational force since Gravitational force is directly proportional to the product of the masses of a body.

Therefore, though the electromagnetic force is stronger than the gravitational force, the electromagnetic force does not dominate the forces in the heavenly bodies as they as not electrically charged.

8 0
4 years ago
Other questions:
  • If a box of supplies is dropped from the cargo hold of an airplane travelling at an altitude of 4,410 meters how long will it ta
    14·1 answer
  • ​Serdar is interested in psychopathology and wants to go to graduate school and get a doctoral degree in psychology. His choice
    12·2 answers
  • A girl is pedaling her bicycle at a speed of 0.10 km/min. What will her displacement be after two
    11·1 answer
  • As a factor of production, how is capital created?
    13·2 answers
  • . Two identical blocks, each of mass M, are connected by a massless string over a pulley of radius R and moment of inertia I. Th
    5·1 answer
  • an electron is held at a distance from a stationary, positively charged object . If the electron is released , what energy chang
    7·2 answers
  • A car drives to the east in a time of 4 hours. Then, immediately (not realistic, but just assume this is the case for this probl
    11·1 answer
  • When a researcher wants to correlate tension with depression, she develops tests that measure these two emotional states. The te
    5·2 answers
  • Calculate the velocity of a car (in m/s) that starts from rest and accelerates at 5 m/s^2 for 6 seconds.
    12·1 answer
  • at what pressure range does the technician valve off the vacuum pump when evacuating to a deep vacuum?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!