Dicot plant
Monocot:
~3 or a multiple of three petals (3, 6, 9, etc.)
Dicot:
~4, 5 or multiples of 4 or 5 (5, 4, 8, 10, 12, 20, 15, etc.)
^^^^^ simple explanation of the petals
Answer:
B = 2.93 x 10⁻⁵ T
Explanation:
The magnetic field due to a straight long wire carrying a current can be found by using Biot-Savart Law, as follows:
B = μ₀I/2πr
where,
B = Magnitude of the magnetic Field = ?
μ₀ = Permeability of free space = 4π x 10⁻⁷ Tm/A
r = distance from wire = 0.03 m
I = Current = 4.4 A
Therefore,
B = (4π x 10⁻⁷ Tm/A)(4.4 A)/(2π)(0.03 m)
<u>B = 2.93 x 10⁻⁵ T</u>
B. ![1.99\cdot 10^{30} kg](https://tex.z-dn.net/?f=1.99%5Ccdot%2010%5E%7B30%7D%20kg)
Explanation:
The gravitational force between the Earth and the Sun is given by:
![F=G\frac{Mm}{r^2}](https://tex.z-dn.net/?f=F%3DG%5Cfrac%7BMm%7D%7Br%5E2%7D)
where
is the gravitational constamt
M is the mass of the Sun
is the mass of the Earth
is the distance between Earth and Sun
Since we know the magnitude of the gravitational force between Earth and Sun,
(from the table given), we can re-arrange the formula and find the mass of the Sun, M:
![M=\frac{Fr^2}{Gm}=\frac{(3.53\cdot 10^{22}N)(1.50\cdot 10^{11} m)^2}{(6.67\cdot 10^{-11})(5.98\cdot 10^{24} kg)}=1.99\cdot 10^{30} kg](https://tex.z-dn.net/?f=M%3D%5Cfrac%7BFr%5E2%7D%7BGm%7D%3D%5Cfrac%7B%283.53%5Ccdot%2010%5E%7B22%7DN%29%281.50%5Ccdot%2010%5E%7B11%7D%20m%29%5E2%7D%7B%286.67%5Ccdot%2010%5E%7B-11%7D%29%285.98%5Ccdot%2010%5E%7B24%7D%20kg%29%7D%3D1.99%5Ccdot%2010%5E%7B30%7D%20kg)
C. Because the mass of the Sun is much much greater than the mass of the Moon
Explanation:
We already know the gravitational force between Earth and Sun (
. By applying the same formula as before, we can calculate the gravitational force between Earth and Moon:
![F=G\frac{Mm}{r^2}](https://tex.z-dn.net/?f=F%3DG%5Cfrac%7BMm%7D%7Br%5E2%7D)
where
is the gravitational constamt
is the mass of the Earth
is the mass of the Moon
is the distance between Earth and Moon
Substituting into the formula, we find
![F=\frac{(6.67\cdot 10^{-11})(5.98\cdot 10^{24} kg)()7.35\cdot 10^{22} kg)}{(3.84\cdot 10^8 m)^2}=1.99\cdot 10^{20} N](https://tex.z-dn.net/?f=F%3D%5Cfrac%7B%286.67%5Ccdot%2010%5E%7B-11%7D%29%285.98%5Ccdot%2010%5E%7B24%7D%20kg%29%28%297.35%5Ccdot%2010%5E%7B22%7D%20kg%29%7D%7B%283.84%5Ccdot%2010%5E8%20m%29%5E2%7D%3D1.99%5Ccdot%2010%5E%7B20%7D%20N)
And we see that this is smaller than the force exerted by the Sun.
Answer: Looked it up but
Explanation:
When the skater lands on the track, the vertical component of his kinetic energy is converted to thermal energy. You can do experiments where there is no loss to thermal energy (only PE and KE conversions) by turning friction off and by making sure the skater doesn't leave the track.
Answer:
Higher launch angles have higher maximum height
Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.