Answer:
divide by mass and volume
Explanation:
density=mass/volume
or in symbols:p=m/v
Answer:
0.229 seconds
Explanation:
Given:
y₀ = 80.6 m
v₀ = 0 m/s
a = -9.8 m/s²
We need to find the difference in times when y = 10.8 m and y = 2.10 m.
When y = 10.8 m:
y = y₀ + v₀ t + ½ at²
10.8 = 80.6 + (0) t + ½ (-9.8) t²
10.8 = 80.6 − 4.9 t²
4.9 t² = 69.8
t = 3.774
When y = 2.10 m:
y = y₀ + v₀ t + ½ at²
2.10 = 80.6 + (0) t + ½ (-9.8) t²
2.10 = 80.6 − 4.9 t²
4.9 t² = 78.5
t = 4.003
The difference is:
4.003 − 3.774 = 0.229
The man has 0.229 seconds to get out of the way.
The right answer for the question that is being asked and shown above is that: "D) The magnetic north and south poles of Earth are interchanged." The statement that best describes an effect of changes in Earth's magnetic field is that D) The magnetic north and south poles of Earth are interchanged.<span>
</span>
Ionic bond is formed due to the transfer of electrons from one atom to the other. In this bond, one atoms (the donor) loses (donates) one or more electron(s) to the other atom (the acceptor) in order for both to become stable.
Examining the choices we have, we will find that K needs to lose one electron while Br needs to gain one electron in order for both to be stable. Therefore, K loses one electron that is gained by Br.
Based on this, the bond in KBr is considered ionic.
The right choice is:
<span>K and Br </span>
Answer:
The the coefficient of kinetic friction between the horizontal surface and the block is 0.536.
Explanation:
Given that,
Spring constant = 105 N/m
Mass of block = 2.00 kg
Compress = 0.100 m
Distance = 0.250 m
We need to calculate the coefficient of kinetic friction
Using relation between friction force and restoring force
Put the value into the relation
Hence, The the coefficient of kinetic friction between the horizontal surface and the block is 0.536.
