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
MissTica
2 years ago
13

By lubricating the pulley, the work needed was decreased from 50 J down to

Physics
1 answer:
Vinvika [58]2 years ago
8 0

Before lubrication:

\tt \dfrac{40}{50}\times 100\%=80\%

The efficiency of the pulley after lubrication becomes:

\tt \dfrac{40}{44}\times 100\%=91\%

You might be interested in
Lamp power with what is the current through the lamp when it is connected to a battery ?
shtirl [24]

Answer:

lamp power with what is the current through the lamp when it is connected to a battery ?

Explanation:

If the light bulbs are connected in parallel, the current flowing through the light bulbs combine to form the current flowing in the battery, while the voltage drop is 6.0 V across each bulb and they all glow. One bulb burning out in a series circuit breaks the circuit.

4 0
3 years ago
Your odometer of your car says 54 123 miles when you start your trip, your watch says 9 45 AM When you get to your
strojnjashka [21]

Answer:

27 mph

Explanation:

9:45 to 11:45 = 2 hours

odometer says you traveled 54 miles in 2 hours or 27 mph

5 0
3 years ago
The two types of grip in table tennis are 1. ___________ and 2. _____________.
pshichka [43]
  1. The two types of grip in table tennis are <u>penhold grip</u> and <u>shakehand grip</u>.
  2. A <u>serve</u> is a stroke that starts a rally.
  3. A <u>receive</u> is a stroke to reply to a <u>serve</u>.
  4. A let is a <u>rally</u> of which the result is <u>not scored</u>.
  5. A point is a rally of which the result is scored.

<h3>What is table tennis?</h3>

Table tennis can be defined as an indoor sport and recreational activity in which two (2) or four (4) players hit a ping-pong ball back and forth on a table that is divided into halves by a low net, especially through the use of a small-solid bat (racket).

<h3>Types of grip in table tennis.</h3>

Generally, there are two (2) main types of grip in table tennis and these include:

  • Shakehand grip
  • Penhold grip

<h3>The fundamental skills of table tennis.</h3>

Basically, there are four (4) fundamental skills used in table tennis and these are:

  1. Forehand drive
  2. Backhand drive
  3. Backhand push
  4. Forehand push.

Read more on table tennis here: brainly.com/question/17358010

8 0
2 years ago
At time t = 1, a particle is located at position (x, y) = (5, 2). If it moves in the velocity field F(x, y) = xy − 1, y2 − 11 fi
Amanda [17]

Answer:

Its approx location is (5.18,1.9)

Explanation:

Using F( 5,2) = ( xy-1, y²-11)

= ( 5*2-¹, 2²-11)

= (9,-5)

= so at point t=1.02

(5,2)+(1.02-1)*(9,-5)

(5,2)+( 0.02)*(9,-5)

(5+0.18, 2-0.1)

= ( 5.18, 1.9)

3 0
4 years ago
Differentiate the following functions with respect to x <br>xsin x​
gtnhenbr [62]

Answer:

Here is your answer

Hope it helps

6 0
3 years ago
Read 2 more answers
Other questions:
  • Before lava reaches the surface the molten material is called what
    10·2 answers
  • Explain why this statement is incorrect: “If I find something on the Internet, that means it is for public use, and I can do any
    7·2 answers
  • An action potential in a particular cell has the same amplitude. True or False
    9·1 answer
  • What is quantum physics ?
    13·2 answers
  • A capacitor is discharged through a 30.0 Ω resistor. The discharge current decreases to 26.0% of its initial value in 3.00 ms .
    8·1 answer
  • Jay fills a wagon with sand (about 20 kg) and pulls it with a rope 40 m along the beach. He holds the rope 25â above the horizon
    11·1 answer
  • Two long parallel wires are separated by 11 cm. One of the wires carries a current of 54 A and the other carries a current of 45
    7·1 answer
  • Wave power is free, sustainable, renewable, and produces zero waste. Therefore, it can contribute to reducing our carbon footpri
    13·1 answer
  • Explain the concept of energy conversion as applied to the generation of electricity also known as electrical energy.​
    9·1 answer
  • A surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the op
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!