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3 years ago

Vectors Have

Physics

2 answers:

agasfer [191]3 years ago

8 0

Answer:

Explanation:

Vectors have both magnitude and direction.

A scalar quantity is something that has magnitude only.

hram777 [196]3 years ago

7 0

Explanation:

There are two types of physical quantities i.e. vector quantities and scalar quantities.

The type of quantities that have both magnitude as well as direction are called vectors. While, the quantities having only magnitude are called scalars.

For example, if we say the ball is moving with a speed of 5 m/s towards north. It shows both direction and magnitude. Here, 5 m/s shows magnitude of speed and North shows the direction.

Hence, the correct option is (b) "magnitude and direction".

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The amount of friction divided by the weight of an object forms a unit less number called the

Romashka [77]

Answer:

Coefficient of friction.

Explanation:

The amount of friction divided by the weight of an object is equal to the coefficient of friction. It is a dimensional less number. It can be given by :

$F=\mu N$

N is normal force.

$\mu$ = coefficient of friction

$\mu=\dfrac{F}{N}$

3 0

3 years ago

A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 235 Hz. A person on the pl

zysi [14]

Answer: 2.9 m/s

Explanation:

The frequency of the beat is 4 Hz

The relative Doppler frequency is 235 + 4 = 239 Hz

We would be solving this question, using the formula for Doppler's effect

f(d) = f(v+vr)/(v-vs), where

F = 235 Hz

F(d) = 239 Hz

v = 344 m/s and vr = vs

239 = 235 (344 + vr) / (344 - vr)

239 ( 344 - vr) = 235 (344 + vr)

82216 - 239 vr = 80849 + 235 vr

82216 - 80849 = 235 vr + 239 vr

1376 = 474 vr

vr = 1376/474

vr = 2.9 m/s

Thus the speed the platform should move is 2.9 m/s

5 0

3 years ago

What is -0.000000698 in scientific notation

dangina [55]

-6.98 × 10-^7 is the answer <3

6 0

3 years ago

The measure of an object's mass and velocity is called __________.

tamaranim1 [39]

By definition, we have to:

$p = m * v$

Where,

p: linear momentum

m: mass of the object

v: object speed

Therefore, knowing the mass of an object and its speed, we have the linear momemtum of the object.

In general, it is useful to calculate the momentum of objects in conservation problems to find the velocity before or after the collision of two objects.

Answer:

The measure of an object's mass and velocity is called momentum.

d. momentum

7 0

4 years ago

Read 2 more answers

When tightening a bolt, you push perpendicularly on a wrench with a force of 170 N at a distance of 0.155 m from the center of t

Thepotemich [5.8K]

Answer:

Explanation:

T=fd

f=170N

d=0.155m

T=170*0.155

T=26.35Nm⁻

i don't know how to convert to pound foot

the answer is correct in newton meters anyway(Nm⁻¹)

4 0

3 years ago