Answer:
A
Explanation:
Momentum is mass times velocity.
A. 275 kg × 0.55 m/s = 151.25 kgm/s
B. 2.7 kg × 7.5 m/s = 20.25 kgm/s
C. 91 kg × 1.4 m/s = 127.4 kgm/s
D. 1.8 kg × 6.7 m/s = 12.06 kgm/s
So A has the greatest momentum.
Answer:
And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.
Answer:
0.4cm
Explanation:
First, you calculate the dis acceleration of the electron generated by the potential difference between the plates:
(1)
q: charge of the electron = 1.6*10^-19 C
V: potential difference between plates = 100V
m: mass of the electron
d: distance between parallel plates = 1cm = 0.01m
by replacing the values of the parameters you obtain:
you use this value in the following kinematic equation:
(2)
v: final velocity = 0m/s (until the electron stops)
from the equation (2) you calculate x, the distance traveled by the electron. But before you calculate the initial velocity of the electron by using the following equation:
Next, you replace vo in (2) to obtain x:
Then, the electron travels 0.1cm from the middle of the region between the parallel plates, hence, the distance between the electron and the negatve plate is:
0.5cm-0.1cm=0.4cm
The ovum, plural ovae (latin) produced in the female bodies of mammals ovaries are the female sex cells.
The sperm are the male sex cells. Produced in the testes.
When sperm and ovum meet, there is a chance that they could join together and thus start a new life. Process is called fertilisation
Answer:
a)3.86 ×10³m/s
b)4.83× 10⁷ s
Explanation:
a)
The speed that a satellite at a given radius must travel so as to orbit in the presence of gravity is given by;
where;
G is the universal gravitational constant given as 6.67 × 10⁻¹¹ N.m²/kg²
m is mass of Earth given as 5.972×10²⁴kg
r is the radius at which the satellites orbit
v is the speed of satellite
r is obtained by the sum of distance from center of Earth and height of satellite from earth
Height of satellite from earth= 11000 nautical miles
1 nautical mile=1.852 km
11000 nautical miles =?
11000*1.852 = 20372 km
1 km = 1000 m
20372 km=?
=20372000m
=2.04×10⁷ m
r= 6.38×10⁶ m +2.04×10⁷ m
r=2.68×10⁷ m
Substitute values in equation;
b)The formula for period is
where T is the period of the satellite
Substituting values