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
makkiz [27]
4 years ago
7

You do a certain amount of work on an object initially at rest, and all the work goes into increasing the object’s speed. If you

do work WITH, suppose the object’s final speed is v. What will be the object’s final speed if you do twice as much work?1. 4 v2. 2 v3. still v4. v/25. v.2
Physics
1 answer:
mezya [45]4 years ago
7 0

Answer:

v_{f2} = √ 2 v_{f}

Explanation:

Work and kinetic energy are related by

       W = ΔK

The formula for work is

    W = F . d

The formula for kinetic energy is

      K = ½ m v²

     W = K_{f} - K₀

Since the body starts from rest, the initial velocity is ro and therefore the kinetic energy is zero.

       W = K_{f}

       W = ½ m v_{f}²

       v_{f} = √ 2W / m

       

    If  W = 2 W₀

       v_{f2} = √ 2 (2W₀) / m

       v_{f2} = √ 2  √2W₀ / m

       v_{f2} = √ 2 v_{f}

You might be interested in
If two different theories describe experimental observations equally well, can one be said to be more valid than the other (assu
Andreas93 [3]

Answer:

No

Explanation:

In such situations we cannot determine which one is more valid as both serves the purpose well.

Two theories are carried out in different environment and circumstance keeping different parameters and one can opt for any number of ways to carry out that experiment but what matter at the end is the accuracy they bring.

Each of the theory is a new discovery and follows all the possible logical rules hence it is not possible to decide which one is more valid.

3 0
3 years ago
How dose an atom change if all of its electrons are removed
Anni [7]

Answer:

When all the electrons are removed from an atom, it becomes something as a positively charged particles also known as alpha particles.

<u>Explanation: </u>

The bare nucleus which is positively charged help in scattering experiments as it has high penetrating powers. <em>An atom is made up of electrons, protons and neutrons. We need huge energy to separate the electrons from their parent atom, still making it separated brings you a particle with a positive charge and only mass having high penetrating power. </em>

7 0
3 years ago
In an aqueous solution where the H+ concentration is 1 x 10-6 M, the OH concentration must be:
vesna_86 [32]

Answer:

D. 1×10⁻⁸ M

Explanation:

[H⁺] [OH⁻] = 10⁻¹⁴

(1×10⁻⁶) [OH⁻] = 10⁻¹⁴

[OH⁻] = 1×10⁻⁸

6 0
3 years ago
Assume a solar cell would produce a current of 500mA and 3 V. What is the power of this solar cell?
defon

Answer:

the power of the solar cell is 1.5 watts

Explanation:

Recall that power is defined as the product of the voltage (V) times the running current (I): Power = V * I.

The only thing we have to take care of before actually performing the operation, is to convert milliamps into Amps, so our answer comes directly in the appropriate units (Watts). 500 mAmps can be written as 0.5 Amps, then, the product becomes:

Power = V * I = 3 V * 0.5 Amps = 1.5 watts

8 0
3 years ago
Radiation transfers thermal energy through_________. Which accurately complete the statement waves direct contact of particles i
evablogger [386]

Answer:

waves

Explanation:

There are three major ways in which heat or thermal energy is transferred namely: conduction, convection and radiation. Please find the description of each below;

- Conduction is the method of heat transfer which involves a physical contact between the substances involved.

- Convection, on the contrary, occurs via a liquid medium

- RADIATION is a method of heat transfer which involves neither physical contact or liquid medium (matter) but occurs through WAVES e.g electromagnetic waves. For example, the sun transfers heat to the Earth via RADIATION.

5 0
3 years ago
Read 2 more answers
Other questions:
  • NEEDD SOME HELP ASAP HELP MEHHH<br> 50 pOINTS
    7·2 answers
  • The two major parts of the optical telescope
    10·1 answer
  • An ice cube floats in a glass of water. Which of the following statements is true? Heat will flow from the water into the ice. H
    5·2 answers
  • The reverse process of changing a liquid to a solid is called ............... or .................... . When a liquid change to
    7·2 answers
  • What is the elevation of Y and Z? Y=3250, Z=2950 Y=3200, Z=2900 Y=3250, Z=2900 Y=3000, Z=2850
    13·1 answer
  • An unbalanced force of 15 N is applied to a 13 kg mass. What is the acceleration of the mass?
    7·1 answer
  • A 37 N object is lifted to a height of 3 meters, What is the potential energy of this object?
    7·1 answer
  • Point charges q1 = 14 µC and q2 = −60 µC are fixed at r1 = (5.0î − 4.0ĵ) m and r2 = (9.0î + 7.5ĵ) m. What is the force (in N) of
    9·1 answer
  • What is the actual depth of rainfall shown in this rain gauge?
    10·2 answers
  • A plane flies with an average
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!