answer

watching

views

rubysnake808Lv1

11 Dec 2019

What is the most likely consequence of open pit mining on plant life?

a. a dramatic reduction in the variety of plant species

b. an increase in the number of plant species

c. the complete loss of plant life in the area occupied by the surface mine

d. a temporary decrease in plant populations

answer

watching

1,032

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Trinidad TremblayLv2

7 Apr 2020

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Related questions

Part A

What property of objects is best measured by their capacitance?

a. the ability to conduct electric current

b. the ability to distort an external electrostatic field

c. the ability to store charge

Part B

Consider an air-filled charged capacitor. How can its capacitance be increased?

a. Increase the charge on the capacitor.

b. Decrease the charge on the capacitor.

c. Increase the spacing between the plates of the capacitor.

d. Decrease the spacing between the plates of the capacitor.

e. Increase the length of the wires leading to the capacitor plates.

Part C

Consider a charged parallel-plate capacitor. How can its capacitance be halved?

Check all that apply.

a. Double the charge.

b. Double the plate area.

c. Double the plate separation.

d. Halve the charge.

e. Halve the plate area.

f. Halve the plate separation.

Part D

Consider a charged parallel-plate capacitor. Which combination of changes would quadruple its capacitance?

a. Double the charge and double the plate area.

b. Double the charge and double the plate separation.

c. Halve the charge and double the plate separation.

d. Halve the charge and double the plate area.

e. Halve the charge separation and double the plate area.

f. Double the plate separation and halve the plate area.

grayant910

4. An open cart on a level surface is rolling without frictionalloss through a vertical downpour of rain, as shown above. As thecart rolls, an appreciable amount of rainwater accumulates in thecart. The speed of the cart will
(A) increase because of conservation of momentum (B) increasebecause of conservation of mechanical energy
(C) decrease because of conservation of momentum (D) decreasebecause of conservation of mechanical energy
(E) remain the same because the raindrops are falling perpendicularto the direction of the cart's motion

9. A child pushes horizontally on a box of mass m which moves withconstant speed v across a horiÂ¬zontal floor. The coefficient offriction between the box and the floor is Âµ. At what rate does thechild do work on the box?
(A) Âµmgv (B) mgv (C) Âµmg/v (D) Âµmg/v (E) Âµmv2

13. Which of the following is true about the net force on anuncharged conducting sphere in a uniform electric field?
(A) It is zero. (B) It is in the direction of the field.
(C) It is in the direction opposite to the field.
(D) It produces a torque on the sphere about the direction of thefield.
(E) It causes the sphere to oscillate about an equilibriumposition.

A 10.0-kg microwave oven is pushed 6.00 m up the sloping surface of a loading ramp inclined at an angle of above the horizontal, by a constant force with a magnitude 110 N and acting parallel to the ramp. The coefficient of kinetic friction between the oven and the ramp is 0.250.

(a) What is the work done on the oven by the force ?

(b) What is the work done on the oven by the friction force?

(d) Use your answers to parts (a), (b), and (c) to calculate the increase in the oven’s kinetic energy.

(e) Use to calculate the oven’s acceleration. Assuming that the oven is initially at rest, use the acceleration to calculate the oven’s speed after the oven has traveled 6.00 m. From this, compute the increase in the oven’s kinetic energy, and compare it to your answer for part (d).