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nignag [31]
3 years ago
8

Which is better for prying open a stuck cover from a can of paint- a screwdriver with a thick handle or one with a long handle?

Which is better for turning stubborn screws? Explain
Physics
1 answer:
horsena [70]3 years ago
4 0
Stubborn screws would be better with a long handle screw driver because it gives you more torque. A paint can would be better with the thick one because more energy would go the lid as the screwdriver wouldn't bend as much.

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A rubber ball with a mass of 0.145 kg is dropped from rest. From what height (in m) was the ball dropped, if the magnitude of th
Elena-2011 [213]

Answer:

1.55 m

Explanation:

Momentum: This can be defined as the product of  mass of a body and it velocity. the S.I unit of momentum is kgm/s.

Mathematically,

Momentum can be represented as,

M = mv................................. Equation 1

Where m = mass of the body, v = velocity of the body, M = momentum.

Making v the subject of the equation,

v = M/m........................................... Equation 2

Given: M = 0.80 kg.m/s, m = 0.145 kg.

Substituting into equation 2,

v = 0.8/0.145

v = 5.52 m/s.

Using the equation of motion,

v² = u² + 2gs ....................... Equation 3.

Where v = final velocity of the rubber ball, u = initial velocity of the rubber ball, s = distance, g = acceleration due to gravity.

Given: v = 5.52 m/s, u = 0 m/s, g = 9.81 m/s².

Substituting into equation 2

5.52² = 0² + 2(9.81)s

30.47 = 19.62s

s = 30.47/19.62

s = 1.55 m.

Thus the ball was dropped from a height of 1.55 m

8 0
4 years ago
a net force of 25 newtons is applied horizontally to 10. -kilogram block resting on a table. what is the magnitude of the accele
Pavel [41]

Answer:2.5m/s^2

Explanation:

Acceleration=force/mass

A=25/10

A=2.5

4 0
3 years ago
The dosage of technetium-99m for a lung scan is 20. μCi /kg of body mass. How many millicuries of technetium-99m should be given
expeople1 [14]

Explanation:

Below is an attachment containing the solution.

7 0
3 years ago
What is the frequency of a wave that has a wavelength of 0.39 m and a speed
gogolik [260]

Answer:

<h3>The answer is option B</h3>

Explanation:

The frequency of a wave can be found by using the formula

f =  \frac{c}{ \lambda}  \\

where

c is the velocity

From the question

wavelength = 0.39 m

c = 86 m/s

We have

f =  \frac{86}{0.39}  \\  = 220.512820...

We have the final answer as

<h3>200 Hz</h3>

Hope this helps you

7 0
3 years ago
The value of acceleration due to gravity (g) on a point. 10,000 kilometers above sea level is about. 1.49 meters/second2. How mu
crimeas [40]
We are given with 98 Newton weight of an object on the surface of the earth with an acceleration equal to 9.8 m/s2. This means the mass of the object is equal to 98/9.8 or 10 kg. Hence the weight of the object 10,000 kilometers above sea level where acceleration is 1.49 m/s2 is 14.9 Newtons. 
8 0
3 years ago
Read 2 more answers
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