Answer:
Yes it is. So
B. True
Explanation:
Earth's surface is constantly changing. Wind, water, and ice break down large rocks and move sediments on the surface. It usually takes years for weathering, erosion, and deposition to cause noticeable changes. Some events, though, change Earth's surface much more quickly.
Specific heat capacity is the amount of energy required to raise the temperature of 1kg of a substance by 1 degree. Therefore, the higher the number, the more energy is required.
Hence, Steel will raise the most, since less energy is required to raise its temperature.
Answer:
Explanation:
The total charge is distributed over the two objects:
The plate and the rod must have . So the charge transferred from the plate to the rod is:
Number of electrons:
Answer:
Speed of the ambulance is 32.7 metres per second.
Explanation:
Let the actual frequency of the siren be .
Frequency observed by me when ambulance is approaching = 540 Hz
Frequency observed by me when ambulance is moving away = 446 Hz
Let be the speed of sound and be the speed of ambulance.Then according to Doppler effect:
When source is moving towards observer,frequency observed is given as
= 540 Hz
When source is moving away from observer,frequency observed is given as
= 446 Hz
Taking and solving the above two equations by eliminating ,
we get
Answer:
the distance covered by the car is 95.4 m.
Explanation:
Given;
initial velocity of the car, u = 36 m/s
acceleration of the car, a = -2.8 m/s²
time of motion of the car, t = 3 s
The distance covered by the car is calculated as;
s = ut + ¹/₂at²
s = 36(3) + ¹/₂ x (-2.8)(3)²
s = 108 - 12.6
s = 95.4 m
Therefore, the distance covered by the car is 95.4 m.