Suppose that you find the volume of all the oceans to be 1.4×109km3 in a reference book. To find the mass, you can use the density of water, also found in this reference book, but first you must convert the volume to cubic meters. What is this volume in cubic meters?

Answers

Answer 1

Answer: 152.600.000
1 km3 = 1000.000m3

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List five different institutional sources of contracts that you know

Answers

The contract of citizenship, the contract of merriage, the contract of loan, the contract of power, and the contract of health care. All these are examples of a contract on institutional level

Two positively charged objects are located so they are 0.20 m apart. If the objects are separated until their centres are 0.40 m apart, by what factor will the electrostatic force between them change?

Answers

The electrostatic force is inversely proportional to the square of the distance that separates the center of the charges. Then if the distance is multiplied by 2, the force will be divided by a factor of 2^2 = 4 or multiplied by 1/4.

What is the difference in electrical potential energy between two places in an electric field?A. current
B. resistance
C. potential difference
D. induction

Answers

I am pretty sure that non of the listed options above is correct. Current
, resistance, potential difference and induction all don't have the dimension of an energy that difference in electrical potential energy should have. Quite a tricky question, be careful.

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has a mass of 0.15kg

Answers

Answer:

120

Explanation:

KE = (mv^2)/2

= ((0.15)(40)^2)/2

= ((0.15)(1600))/2

= 240/2

A coffee maker uses 7 amps of current and 110 volts. How much power does it use?

Answers

Power=Amperage*Voltage
P=I*V
now power= 7amps*110volts
Power coffee maker uses is 770 watts.

Answer: The correct answer is 770 W.

Explanation:

The expression of the power in terms of potential and current is as follows;

P=VI

Here, P is the power, V is the potential and I is the current.

It is given in the problem that A coffee maker uses 7 amps of current and 110 volts.

Calculate the power of a coffee maker.

P=VI

Put I= 7 A and V= 110 V.

P=(110 V)(7 A)

P= 770 W

Therefore, the power of the coffee maker is 770 W.

A ramp makes pulling a cart up a hill easier. Less force is needed to pull the cart up alonger hill. How can you tell if this is mechanical efficiency?

Answers

The correct answer is that the longer the hill, the larger the output force. If a ramp makes pulling a cart up a hill easier, that is because it has less force needed to pull the cart up along the hill. It is mechanical efficient simply because the longer the hill, the larger the output force being exerted.

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