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
lara31 [8.8K]
3 years ago
9

A DC voltmeter may be used directly to measure a) frequency b)polarity c) power factor d) power

Physics
1 answer:
pshichka [43]3 years ago
6 0
A DC voltmeter may be used directly to measure B. Polarity
You might be interested in
This boy uses a force to lift a heavy rock. (He is carrying it.) What can the boy do if he wants to lift the same rock more quic
lutik1710 [3]
I nthink the  answer is c may be
5 0
3 years ago
Read 2 more answers
A car of mass 875 kg is traveling 30.0 m/s when the driver applies the brakes, which lock the wheels. The car skids for 5.60 s i
AleksAgata [21]

Explanation:

It is given that,

Mass of the car, m = 875 kg

Initial speed of the car, u = 30 m/s

Brakes are applied i.e. v = 0

The car skids for 5.60 s in the positive x - direction before coming to rest, t = 5.6

(a) Acceleration of the car, a=\dfrac{v-u}{t}

a=\dfrac{0-30}{5.6}

a=-5.35\ m/s^2

(b) Force, F = ma

F=875\ kg\times -5.35\ m/s^2

F = -4681.25 N

So, the force of 4681.25 N is acting on the car.

(c) Let x is the distance covered by the car. So,

v^2-u^2=2ax

0-u^2=2ax

x=\dfrac{-u^2}{2a}

x=\dfrac{-(30\ m/s)^2}{2\times -5.35\ m/s^2}

x = 84.11 meters

So, the distance covered by the car is 84.11 meters. Hence, this is the required solution.

7 0
3 years ago
You travel in a circle, whose circumference is 8kilometers, at an average speed of kilometer/hour. If you stop at the same point
dimaraw [331]

You skipped over a number in the question, and you didn't tell me what my average speed is. Lucky for you, my average speed has NO EFFECT on the answer to the question.

When you calculate velocity, you only use the straight-line distance between the start-point and the end-point. It doesn't matter what route the thing took to get there, or how much ground it actually covered.

If I travel in a circle and stop at the same point I started from, then the size of the circle doesn't matter, and neither does my speed. The distance between my start-point and my end-point is zero, and my average velocity is zero.

3 0
4 years ago
A column of soldiers, marching at 114 steps per minute, keep in step with the beat of a drummer at the head of the column. It is
kipiarov [429]

Answer:

length of column is 140.42 m

Explanation:

in 1 min the soldiers travels 114 steps

so to complete 1 step the time taken by the soldiers =

t =  \dfrac{1\ min}{114}

t =  \dfrac{60}{114}  

t = 0.526 s

speed of sound = 343 m/s

length of the column = v × t

                                   = 343 m/s × 0.526 s

                                   = 140.42 m

hence the length of column is 140.42 m

5 0
3 years ago
A ball rolls 60 centimeters along a sidewalk in 5 seconds what is the speed of the ball.
meriva

Answer:

12 cm/s

Explanation:

Quite simply, you are looking for  cm/s

  so   60 cm / 5s   = 12 cm/s

6 0
2 years ago
Read 2 more answers
Other questions:
  • The first and second coils have the same length, and the third and fourth coils have the same length. They differ only in the cr
    8·1 answer
  • Consider two examples of electromagnetic radiation: one with a wavelength of 500 nm, and the other with a wavelength of 2 cm. Fo
    7·2 answers
  • A light plane is headed due south with a speed of 200 km/h relative to still air. After 1.00 hour, the pilot notices that they h
    8·1 answer
  • Suppose there is a sample of xenon in a sealed rectangular container. The gas exerts a total force of 6.05 N perpendicular to on
    7·1 answer
  • a 1500 kg car traveling at 15 m/s to the south collides with a 4500 kg truck that is intially at rest at a spotlight. The car an
    8·2 answers
  • Which of the following is a benefit of urbanization
    6·2 answers
  • What force is needed to accelerate a child on a sled at 1.25 m/s² is the total mass of the child and sled is 60 kg?
    11·1 answer
  • A skydiver falls out of a plane from rest, and experiences no air resistance. Eventually, this skydiver reaches a velocity of 33
    13·1 answer
  • .A 0.6 kg basketball is thrown straight up at a velocity of 4 m/s. What is the initial kinetic energy of the basketball?
    15·1 answer
  • 12.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!