You didn’t put a picture bro
Answer:
The acceleration is
Explanation:
Given that,
Speed
Time t = 60.0 sec
We need to calculate the acceleration
Using formula off acceleration
We know that,
Missile goes from rest
So, Initial velocity =0
Put the value into the formula
On right hand side multiplying and dividing by g = 9.8m/s²
Put the value of g
Hence, The acceleration is
The correct option is A.
Elements are substances that are made up of atoms of the same type., while compounds are made of two or more atoms of different types.
Some common examples of elements are Iron, Sodium, oxygen, Hydrogen, while NaCl ( Sodium Chloride), Water (H_2O) , Ammonia (NH_3) are compounds.
It can be seen that the compounds are composed of atoms of different substances.
Chlorine is a diatomic molecule, where two Chlorine atoms are bonded by a covalent bond. Since both atoms in a Chlorine molecule are the same, it cannot be called a compound.
Hence Chlorine, though it has more than one atom in its molecular form, is still called element.
the pitch which you hear will be greater than 300 Hz since the sound source is approaching you. But once stopped, the pitch will be 300 Hz exactly. So the pitch must be gradually decreasing from above 300 Hz to 300 Hz during the slowing down process.
Answer:
(a) 391 N
(b) 39.89 kg
(c) 5 m/s^2
Explanation:
Reading of scale when escalator is moving up = 591 N
Reading of scale when escalator is at rest = 391 N
Le a be the acceleration of the escalator.
(a) when the escalator is at rest, it gives the weight of person.
So, mg = 391 N
Thus, the weight of person is 391 N.
(b) Weight = m g
m = Weight / g = 391 / 9.8 = 39.89 kg
Thus, the mass of the person is 39.89 kg.
(c) As it is moving up, by using the Newton's second law
R - mg = m a
591 - 391 = 39.89 a
a = 5 m/s^2
Thus, the acceleration of the elevator is 5 m/s^2.