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3 years ago

Which two options describe physical properties of matter?

Physics

2 answers:

Elina [12.6K]3 years ago

7 0

Answer:

D, B

Explanation:

Pavlova-9 [17]3 years ago

6 0

Answer:

A. (Buoyancy) and D. (Temperature)

Explanation:

I took itttttttttttttttt

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Negative attitudes that are tinged with fear, hatred, or suspicion is a definition of:

11Alexandr11 [23.1K]

Answer:

Below:

Explanation:

It's the definition of "Cognitive Dissonance".

6 0

3 years ago

Two bullets have masses of 3.0 g and 6.0 g respectively. Both are fired with a speed of 40.0 m/s.(a) Which bullet has more kinet

Stolb23 [73]

Answer:

(a) The bullet with a mass of 6.0 g

(b) $\frac{K_2}{K_1}=2$

Explanation:

(a) Kinetic energy is defined as:

$K=\frac{mv^2}{2}$

So, we have:

$K_1=\frac{3*10^{-3}kg(40\frac{m}{s})^2}{2}\\K_1=2.4J$

$K_2=\frac{6*10^{-3}kg(40\frac{m}{s})^2}{2}\\K_2=4.8J$

The bullet with a mass of 6.0 g have more kinetic energy

(b) We have $m_2=2m_1(1)$ and $v_1=v_2(2)$ . So:

$K_1=\frac{m_1v_1^2}{2}\\K_2=\frac{m_2v_2^2}{2}\\\frac{K_2}{K_1}=\frac{\frac{m_2v_2^2}{2}}{\frac{m_1v_1^2}{2}}(3)$

Replacing (1) and (2) in (3):

$\frac{K_2}{K_1}=\frac{\frac{2m_1v_1^2}{2}}{\frac{m_1v_1^2}{2}}\\\frac{K_2}{K_1}=2$

4 0

3 years ago

At 20 degrees Celsius, conducting wires made of different materials have the same length and the same diameter. Which wire has t

DENIUS [597]

Answer:

Aluminium

Explanation:

Aluminium has the least resistance since It has 3 free electrons per atom. Its resistivity is low compared to other metals provided in the choices (gold, nichrome, tungsten). Low resistivity of metals means a high conductance of the metal referred to.

7 0

4 years ago

A cat runs and jumps from one roof top to another which is 5 m away and 3 m below. Calculate the minimum horizontal speed with w

icang [17]

ThIs is the same type of problem
find out the time value
3 = 1/2*a*T^2
6/10 = t^2
t = 0.77 seconds
and the distance is given 5 m
thus speed ,= distance/time
speed = 5/0.77
= 6.45 m/s

6 0

3 years ago

Gauss's law combines the electric field over a surface with the area of the surface. From Coulomb's law we know that the electri

Romashka-Z-Leto [24]

The change in surface area of Gaussian surface with radius (r) is 8πr.

<h3>Electric field from Coulomb's law</h3>

The electric field experienced by a charge is calculated as follows;

$E = \frac{Q}{4\pi \varepsilon_o r^2}$