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# Recently Posted Questions in Physics

Nuclear reactions result in tremendous amounts of a. uranium. b. energy. c. fission. d. mass.

I believe the correct answer from the choices listed above is option B. Nuclear reactions result in tremendous amounts of energy. nuclear reaction is considered to be the process in which two nuclear particles interact to produce two or more nuclear particles or ˠ-rays. Hope this answers the question.

Which tools would be use to find an irregularly shaped object’s mass and volume?

Scales for weight
Any beaker to measure the volume of liquid displaced

The colors of the visual spectrum

violetbluegreenyelloworange red

The stress force that causes a mass of rock to pull or twist in opposite directions in called ______.

Shearing

The stress force that causes a mass of rock to pull or twist in opposite directions is called shearing.

Hope this helps! :)

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If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat was lost in joules?

Please, you have to apply the formula below:

Q=c∗m∗Δt

where Q is the energy lost,

c is the specific heat of water,

m is the mass of water involved,

so m=3.75 *10^-1 Kg

c=4,184 J/(Kg*°C)

delta t=37.5 °C

I hope my answer has come to your help. God bless and have a nice day ahead!

The heater in the thermostat control circuit in the cooling mode is active when the ____.

Here is the correct answer that would best complete the given statement above. The heater in the thermostat control circuit in the cooling mode is active when the heat anticipator in the thermostat control circuit is in the heating mode. Hope this is the answer that you are looking for.

1. How many correct experiments do we need to disprove a theory? How many do we need to prove a theory? Explain. 2. A guidebook describes the rate of climb of a mountain trail as 120 meters per kilometer. How can you express this as a number with no units?

1.  You can never prove a theory. All theories and laws and scientific knowledge in general is provisional. If your theory is inconsistent with an experiment (and you are sure the experiment is correct), your theory needs to be pitched or modified.

2.
change the meters to kilometers;

120 m/km = .12 km/km = .12

or the kilometers to meters;

120 m/km = 120 m/1000m = .12

This sounds like its telling you how far you climb vertically (.12 km) for every 1 km that you walk along the slanted, winding trail.

The unitless number ".12" is usefull because now you can think of the rate of climb in any units you want. So you rise vertcally .12 miles for every mile you walk the trail, or you rise .12 ft for every foot you walk the trail, etc.

Gravitational force between two objects depends on

SIZE AND DISTANCE BETWEEN THEM

What are the characteristics of weight

Shape or texture...im just try....

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Where do plants get energy to live and grow?

From the sun, i think thats what it is.

Will upvote!! True or False- The parts of a mixture keep their own properties when they are combined.

I believe the correct answer is false. The parts of a mixture do not keep their own properties when they are combined. When they are combined, they exhibit or behave with different properties since each atom is bonded which gives them unique properties. Hope this helps.

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An object accelerates at 5 m/s2, over a 3 second time period to a final velocity of 20 m/s. What is the initial velocity?

Using kinematic equation, v =u +at, u= v-at = 20- 3x5 = 5m/s. Initial velocity = 5 m/s

. How much work in joules is done by a person who uses a force of 25 N to move a desk 3.0 m?

We Know, W = F * s
here, F = 25 N
s = 3 m

Substitute it into the expression,
W = 25 * 3
W = 75 Joule

Hope this helps!

In a transverse wave the peak of the wave is the crest and the lowest spot is the trough

That statement is "TRUE"

Hope this helps!

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What happens during evaporation

During Evaporation, Liquid get transferred from it's phase to "Gases Phase"

And remember it happens within certain limit of temperature, 'cause if you increase temperature, it will start "Boiling", which is different!

Hope this helps!

How can matter be exchanged between spheres

Spheres are open systems. Matter and energy are constantly exchanged between the spheres via chemical reactions, radioactive decay, radiation (light&heat), growth and decay of organisms.

A 4.3 kg bowling ball is initially at rest. If a 15 N force acts on it for 0.85 s, what is the final velocity of the bowling ball?

According to Newton's 2nd law of motion, F = ma ==> a = F / m =15/4.3 = 3.48 m/s^2. Now using kinematic equation, v=u+at => v= 0 + 3.48x0.85 => V= 2.958 m/s

What force is exerted on a machine?

input force :) k have a good day

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