By definition we have that momentum is the product of the mass of the object by the velocity of the object. In other words:
p = m * v
Both objects have the same speed because they reach the ground at the same time.
However, object a is heavier than object b. The weight of the objects is:
a = 2m
b = m
Therefore the momentum of a and b is
pa = 2mv
pb = mv
Object a has the greatest momentum
Answer
pa> pb
2mv> mv
Answer:
Explanation:
One thing we need to remember is that at the max height of parabolic motion, the velocity is 0 (because the object has to stop for a millisecond in the air to turn around and head back down). Use the one-dimensional motion equation
v = v₀ + at and filling in:
0 = 30 + (-9.8)(t) and
-30 = -9.8t so
t = 3 seconds
Answer:
The beat frequency is 0.0019 MHz.
Explanation:
Given that,
Velocity = 0.32 m/s
Frequency = 4.40 MHz
Speed of wave = 1540 m/s
We need to calculate the frequency
Case (I),
Observer is moving away from the source
Using Doppler's effect
Where, v' = speed of observer
Put the value into the formula
Case (II),
Cell is as the source of sound of frequency f' and it moving away from the observer.
Using formula of frequency
We need to calculate the beat frequency
Hence, The beat frequency is 0.0019 MHz.
Q = mcθ
Where m = mass of water in kg.
c = specific heat capacity in kJ/kg⁰C, c for water = 4200 kJ/kg⁰C
θ = temperature rise in ⁰C
Q = 100*4200* 20 Note here the temperature rise is 20 ⁰C
Q = 8 400 000 J
In calories, 4.2 J = 1 Calorie
= 8 400 000 / 4.2 = 200 000
Q = 200 000 Calories
Answer:
» 30 N
Explanation:
<u>Given</u> :
Mass → m → 6kg
Acceleration → a →
<u>To</u><u> </u><u>find</u> :
The formula for force
F = m • a
F = 6 • 5
F = 30 N