When the direction of an object changes, what happens to its velocity?

How much work is done by the force lifting a

Ann [662]

The work done in lifting the hamburger is equal to the increase in gravitational potential energy of the hamburger, given by

$W=\Delta U=mg \Delta h$

where

m=0.1 kg is the mass of the hamburger

$g=9.81 m/s^2$ is the gravitational acceleration

$\Delta h=0.3 m$ is the increase in height of the hamburger

Substituting numbers into the equation, we find

$W=(0.1 kg)(9.81 m/s^2)(0.3 m)=0.3 J$

So, the correct answer is

(3) 0.3 J

3 0

4 years ago

The product of voltage times amperage is known as what?

Usimov [2.4K]

Answer:

Power=V*I which corresponds to the second option shown: "voltage times amperage"

Explanation:

The electric power is the work done to move a charge Q across a given difference of potential V per unit of time.

Since such electrical work is the product of the potential difference V times the charge that moves through that potential, and this work is to be calculated by the unit of time, we need to divide the product by time (t) which leads to the following final simple equation

$Power=\frac{V\,Q}{t} =V\,\frac{Q}{t} = V\, I$

5 0

3 years ago

What is the resultant force acting on an object? The first force is 45 N West and the second is 23 N East.

Paul [167]

Answer:

22N West

Explanation:

45-23 because they are in opposite directions.

4 0

3 years ago

Which plate is covering most of two continents ? what two continents?

ololo11 [35]

The plate that is covering most of the two continents is the Eurasian plate.
The continents are 
1. Europe 
2. Asia
The Eurasian plate is a tectonic plate that amasses the whole continent of what others call as “Eruasia”. It takes part of the oceanic crust that starts from the Mid-Atlantic Ridge and extends itself to northward of the Gakkel Ridge. The size of this plate is for about 67,800,000 km according to statistics and geography.

3 0

3 years ago

Read 2 more answers

Two square air-filled parallel plates that are initially uncharged are separated by 1.2 mm, and each of them has an area of 190

julia-pushkina [17]

Answer:

$5.5\cdot 10^{-11} C$