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3 years ago

You indicate that a symbol

Physics

1 answer:

Goryan [66]3 years ago

8 0

Answer:

B. over the symbol.

Explanation:

vectors are represented with a symbol carrying an arrow head with also indicates direction

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What SI unit is used to measure mechanical energy

VashaNatasha [74]

The SI unit of energy is the Joule .

Any kind of energy ... electrical, mechanical, nuclear, solar,
wind etc. It's easy to change from one form to another ... we
do it every day ... and they all have the same unit.

7 0

4 years ago

Read 2 more answers

An element's atomic number is the

Zepler [3.9K]

the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.

Hope this helped

8 0

3 years ago

Go around your house and hit (or tap) ten different objects. The objects should be different shapes and made of different materi

Blababa [14]

Answer:

Explanation:

go around your house and tap random objects. For example, a sink. What noise did it make? was it loud or quiet? was it soft or hard? I hope this helps

4 0

3 years ago

Read 2 more answers

The distance covered by a car at a time, t is given by x = 20t + 6t4, calculate

Anni [7]

Answer:

(i) v = 44 m/s

(ii) a = 72 m/s^2

Explanation:

You have the following equation for the potion of a car:

$x=20t+6t^4$

(i) The instantaneous velocity is the derivative of x in time:

$\frac{dx}{dt}=20+(6)(4)t^3=20+24t^3$

for t = 1 is:

$v(t=1)=\frac{dx}{dt}=20+24(1)^3=44m/s$

(ii) The instantaneous acceleration is the derivative of the velocity:

$\frac{dv}{dt}=24(3)t^2=72t^2$

for t = 1

$a(t=1)=\frac{dv}{dt}=72(1)^2=72m/s^2$

8 0

4 years ago

Several days after snowfall , the roofs of some homes on your street have almost no snow on them, while the roofs on other homes

Alina [70]

Explanation:

This due to thermal insulation of some of the roof.

An insulator is body is a poor conductor of heat and will require high thermal energy to cause temperature changes.

A house with a roof that is thermally insulated will have poor heat conduction.
Since little heat is conducted, there wont be enough thermal energy to melt the snow.
Thermal energy is directly related to heat.
A house that is not insulated will absorb a lot of heat.
This will cause the snow to melt very fast.

Learn more:

Electrical conductors and insulators brainly.com/question/3874443

#learnwithBrainly

5 0

3 years ago