The best evidence of Earths rotation is provided by

Answers

Answer 1

Answer: The direction of a freely swinging pendulum changes during the day. That is also how we were able to prove that the Earth rotates.

Related Questions

classify the following substances as acidic, basic, or neutral: a. a soapy solution, pH = 9 b. a sour liquid, pH = 5 c. a solution with four times as many hydronium ions as hydroxide ions
Suppose that now you want to make a scale model of the solar system using the same ball bearing to represent the sun. How far from it would you place a sphere representing the earth? (Center to center distance please.) The distance from the center of the sun to the center of the earth is 1.496×10111.496×1011 m and the radius of the sun is 6.96×1086.96×108 m.
A closed conducting loop through which an electrical current can flow is which of the following?a. resistance b. circuit c. voltage d. electrical pressure
Two cars collide at an intersection. Car A, with a mass of 1900 kg, is going from west to east, while car B, of mass 1500 kg, is going from north to south at 17.0 m\s. As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an expert witness, you inspect the scene and determine that, after the collision, the enmeshed cars moved at an angle of 60.0degrees south of east from the point of impact.Part A WAS: How fast were the enmeshed cars moving just after the collision? I got 8.66 for velocity in part a which was CORRECT but i can't figure out PART B??...Part B:How fast was car A going just before the collision
When_____forces act on an object, they cause the object to move.A. Balanced B. Unbalanced C. friction D net B?

At a constant pressure and a temperature of 280 K, the gas in a cylinder has a volume of 10.0 liters. If the volume of the gas is increased to 20.0 liters, what is the new temperature? 2800 K 28 K 140 K 560 K

Answers

560K I believe is the answer

a 5 v battery is connected to a resistor which draws a 2 a current. What is the power used by this circuit

Answers

Electrical power = (voltage) x (current)

= (5 volts) x (2 amperes) = 10 watts.

The gravitational strength on Earth is less than the gravitational strength on Jupiter. What will happen to a satellite when it travels from Earth to Jupiter? a Its mass will increase. b Its mass will decrease. c Its weight will increase. d Its weight will decrease.

Answers

Answer:

weight will decrease

Explanation:

this is because mad stays the same no matter what so it was between this and weight increases

Answer:

Its weight will decrease.

Explanation:

just because

What is the kinetic energy of a 108 kg object that is moving with a speed of 11.1 m/s ?

Answers

Answer:

6,653.34 J

Explanation:

Kinetic energy can be found using the following formula.

$KE=(1)/(2) mv^2$

where m is the mass in kilograms and v is the velocity in m/s.

The object is 108 kilograms and is moving at a speed of 11.1 m/s. Therefore, the mass is 108 kg and the velocity is 11.1 m/s.

m=108 kg

v=11.1 m/s

Substitute these values into the formula.

$KE=(1)/(2)*108*11.1^2$

Evaluate the exponent first. 11.1^2 is the same as 11.1*1.11, which is equal to 123.21

$KE=(1)/(2) *108*123.21$

Multiply 108 and 123.21

$KE=(1)/(2)*13306.68$

Multiply 1/2 and 13306.68

$KE=6653.34$

The kinetic energy of the object is 6,653.34 Joules (kg m2/s^2)

A ping pong ball rolls off a 5.Om high table and lands on the floor, 3.0maway from the table. How long is the ball in the air?

Answers

Answer:

The ball was 1.01 seconds in the air

Explanation:

Horizontal Motion

When an object is thrown horizontally with a speed v from a height h, the range or maximum horizontal distance traveled by the object can be calculated as follows:

$\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}$

If we know the value of d and h, we can solve the equation for v:

$\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}$

Since the horizontal speed is constant, we can calculate the time the ball was in the air by using the equation:

$\displaystyle t=(d)/(v)$

The ping pong ball rolls from a height of h=5 m and lands on the floor a distance of d= 3 m away from the table. Calculate the speed:

$\displaystyle v=3\cdot\sqrt{\frac {9.8}{2\cdot 5}}$

$\displaystyle v=3\cdot\sqrt{\frac {9.8}{10}}$

Calculating:

$v=2.97\ m/s$

Now calculate the time:

$\displaystyle t=(3)/(2.97)$

$t=1.01\ sec$

The ball was 1.01 seconds in the air

Note: The time does not depend on the distance d at all. If we borrow the equation from free-fall motion, the time can be calculated with:

$\displaystyle t=\sqrt{\frac {2h}{g}}=\sqrt{\frac {10}{9.8}}=1.01\ sec$

What is the time required for an object startingfrom rest to fall freely 500. meters near Earth’s
surface?
(1) 51.0 s (3) 10.1 s
(2) 25.5 s (4) 7.14 s