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
pickupchik [31]
3 years ago
7

3. Infer A car is travelling down a

Physics
1 answer:
Zinaida [17]3 years ago
8 0

Answer:

because the car is broken.

Explanation:

You might be interested in
As a delivery truck travels along a level stretch of road with constant speed, most of the power developed by the engine is used
velikii [3]

Answer:

128 N

Explanation:

Power can be defined as

P = F\cdot v

<em>F</em> is the force and <em>v</em> is the velocity.

F = \dfrac{P}{v}

According to the question, <em>P</em> = 5.15 hp = 5.15 × 746 W.

<em>v</em> = 30 m/s

F = \dfrac{5.15\times 746\text{ W}}{30\text{ m/s}} = 128 \text{ N}

Since most of the power is used to compensate for the energy transformations due to friction forces, the total frictional is 128 N

8 0
3 years ago
B) A non-inductive load takes a current of 15 A at 125 V. An inductor is then connected
levacccp [35]

Answer:

i. 43.5 mH ii.  16 Ω. In phasor form Z = (8.33 + j13.66) Ω iii 58.64°

Explanation:

i. The resistance , R of the non-inductive load R = 125 V/15 A = 8.33 Ω

The reactance X of the inductor is X = 2πfL where f = frequency = 50 Hz.

So, x = 2π(50)L = 100πL Ω = 314.16L Ω

Since the current is the same when the 240 V supply is applied, then

the impedance Z = √(R² + X²) = 240 V/15 A

√(R² + X²) = 16 Ω

8.33² + X² = 16²

69.3889 + X² = 256

X² = 256 - 69.3889

X² = 186.6111

X = √186.6111

X = 13.66 Ω

Since X = 314.16L = 13.66 Ω

L = 13.66/314.16

= 0.0435 H

= 43.5 mH

ii. Since the same current is supplied in both circuits, the impedance Z of the circuit is Z = 240 V/15 A = 16 Ω.

So in phasor form Z = (8.33 + j13.66) Ω

iii. The phase difference θ between the current and voltage is  

θ = tan⁻¹X/R

= tan⁻¹(314.16L/R)

= tan⁻¹(314.16 × 0.0435 H/8.33 Ω)

= tan⁻¹(13.66/8.33)

= tan⁻¹(1.6406)

= 58.64°

3 0
2 years ago
If 1 foot is 30.28 centimeters.how many cm is 130 feet
uranmaximum [27]

Answer:3,936.4

Explanation:

If 1 foot is 30.28 centimeters multiply 30.28 by 130

6 0
3 years ago
Assuming the ball's initial velocity was 51 ∘ above the horizontal and ignoring air resistance, what did the initial speed of th
Umnica [9.8K]

horizontal distance of home run is 400 ft = 122 m

height of the home run is 3 ft = 0.9 m

now the angle of the hit is 51 degree

now we have equation of trajectory of the motion

x = vcos\theta * t

y = v sin\theta * t - \frac{1}{2} gt^2

solving above two equations we have

y = xtan\theta - \frac{gx^2}{2v^2cos^2\theta}

now here we will plug in all data

0.9 = 122 tan51 - \frac{9.8 * 122^2}{2*v^2 * cos^251}

0.9 = 150.65 - \frac{184150.2}{v^2}

\frac{184150.2}{v^2} = 149.75

v = 35.1 m/s

<em>so the ball was hit with speed 35.1 m/s from the ground</em>

8 0
3 years ago
1. Which of the following is an example of deduction? a. Hector calls the weather service to find out if the temperature outside
Ann [662]

Answer:

b

Explanation:

she made a conclusion based off of her own observation, and isnt dumb enough to call a weather station

5 0
3 years ago
Other questions:
  • Why sodium &amp;pottasium are kept under kerosine
    10·1 answer
  • A runner starts at point A runs around a 1 mile track and finishes the run back at point A. Which of the following statement is
    15·1 answer
  • The rate at which current flows is measured in .
    12·2 answers
  • Which characteristics describe the troposphere? Select two options.
    5·2 answers
  • Who was the man who lived from 460B.C.–370B.C. and was among the first to suggest the idea of atoms?
    6·1 answer
  • Suppose that it takes 0.6 seconds for a mass on a spring to move from its
    7·1 answer
  • Which of the following is a result of a limiting factor in an ecosystem?
    10·2 answers
  • 16. Why does the number of carts matter when designing a roller coaster track? (Hint: PE = mass x gravity x height and KE = /2 m
    7·1 answer
  • What is the frequency of a raido wave with a wavelength of 1.0 mm?
    13·1 answer
  • If a ball is tossed straight up into the air, at what position is its potential energy the greatest? Question 3 options: When it
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!