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3 years ago

Is ‘velocity’the displacement of an object during specific unit of time?

Physics

2 answers:

babunello [35]3 years ago

5 0

Answer:

Yes

Explanation:

The displacement covered by a body in unit time is called velocity.

Nataliya [291]3 years ago

5 0

Answer:

Yes

Explanation:

The velocity vector is used to determine the velocity in a given time interval. It is calculated by dividing the displacement by the elapsed time, according to the following formula: We must remember that velocity is a vector. Therefore, it has magnitude and direction. Answer: Velocity is the displacement of an object during a specific unit of time.

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Can someone help me with universal gravation

Nesterboy [21]

States that particles are attracts with every other particle. wich force is directily proportional product of two masses and inversely proportional to the distance between the centers.

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3 years ago

The ratio of the output work to input force is the _ of the machine ?

Colt1911 [192]

<h3><u>Answer;</u></h3>

Mechanical advantage

<h3><u>Explanation;</u></h3>

Mechanical advantage is the ratio of force output from a machine divided by the force input into the machine.
Mechanical advantage measures the machine's force-magnifying effect. It is an advantage gained by using simple machines to accomplish work with less effort.
The formula is; M.A = output force/ Input force

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3 years ago

Read 2 more answers

2. A portion of the body receives 0.15 mGy from radiation with a quality factor Q = 6 and 0.22 mGy from radiation with Q = 10. (

DiKsa [7]

Answer with Explanation:

We are given that

$D_1=0.15mGy$

$D_2=0.22mGy$

$Q_1=6$

$Q_2=10$

a.We have to find the total dose

Total dose= $D=D_1+D_2$

Using the formula then, we get

$D=0.15+0.22$

$D=0.37mGy$

b.We have to find the total dose equivalent

Total dose equivalent=H= $D_1Q_1+D_2Q_2$

Using the formula

$H=0.15(6)+0.22(10)$

H=3.1mSv

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3 years ago

A microwave oven operates on the principle that application of a high-frequency field causes electrically polarized molecules su

Tema [17]

Answer:

The time it would take the beef to reach a temperature of 0⁰C is t= 662 sec = 11.93 min

The time it would take to heat the beef to uniform temperature of 80⁰C is

t = 365 sec =5.93 min

Efficient absorption of Microwave power is in regions of liquid water . Hence if the food or the microwave irradiation is not uniform, the power will be absorbed non-uniformly, resulting in a non-uniform temperature rise. Defrost region will absorb more energy per unit volume than frozen region.if food is of low thermal conductivity, there will be insufficient time for heat conduction to make the temperature more uniform.Use of low power allows more time for conduction to occur.

Explanation:

The explanation is shown on the first second and third uploaded image

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3 years ago

Why are some forces considered to be noncontact forces? A. Objects must be far apart in order to exert a force. B. Objects do no

kompoz [17]

Answer:

B. Objects do not have to touch each other to experience a force.

Explanation:

For example ..One of the noncontact forces is magnetic force whereby a magnetic object will be attracted to another magnetic object of oppsite charged particles, through waves called electromagnetic waves. On the other hand, the two magnetic objects of similar charged particles can repel through electromagnetic waves..

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3 years ago