Velocity= 1/4 = 0.25 m/s towards the ball
W is the noble gas having atomic number 10 and configuration (2,8)
x, y and z are the s block elements. They have 2,2 and 1 electrons in their outermost shell respectively.
Atomic size decreases across the period and increases down the group. Element z is having more atomic size.
Hope it helps you!!!!
Answer:
(a) The length of the pendulum on Earth is 36.8cm
(b) The length of the pendulum on Mars is 13.5cm
(c) Mass suspended from the spring on Earth is 0.37kg
(d) Mass suspended from the spring on Mars is 0.36kg
Explanation:
Period = 1.2s, free fall acceleration on Earth = 9.8m/s^2, free fall acceleration on Mars = 3.7m/s^2
( a) Length of pendulum on Earth = [( period ÷ 2π)^2] × acceleration = (1.2 ÷ 2×3.142)^2 × 9.8 = 0.0365×9.8 = 0.358m = 35.8cm
(b) Length of the pendulum on Mars = (1.2÷2×3.142)^2 × 3.7 = 0.0365×3.7 = 0.135cm = 13.5m
(c) Mass suspended from the spring on Earth = (force constant×length in meter) ÷ acceleration = (10×0.358) ÷ 9.8 = 0.37kg
(d) Mass suspended from the spring on Mars = (10×0.135)÷3.7 = 0.36kg
Answer:
1.92 m/s
Explanation:
Velocity is defined as the distance moved per unit time with consideration of the direction. The direction aspect differentiates speed from velocity since for speed, we don't need to consider the direction.
Distance moved for circular path is equal to its circumference and the circumference is given by 
where r is the radius and substituting for d then
Substituting 5.5 m for r and 18 s for t then
To the nearest hundredth, the velocity is 1.92 m/s
Answer: The correct answer is option (C).
Explanation:
Law of reflection:
- Angle of incident is equal to angle of reflection;∠i=∠r
- Incident ray, reflected ray and normal to the reflecting interface at the point of incidence all lie in same plane.
When light ray from candle strikes a mirror at an angle of 40° with the normal, then the angle at which ray reflected back will 40°.
